BD28411MUV-EVK-001 - Rohm Semiconductor

〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays

1/37 TSZ02201-0C1C0E900220-1-2

TSZ22111 • 14 • 001

www.rohm.com

Low Consumption Power Class D Amplifier

9W+9W Analog Input

Class D Speaker Amplifier

BD28411MUV

General Description

BD28411MUV is 9W+9W stereo class D amplifier which

does not require an external heat sink.

This IC is incorporated with a precise oscillator to

generate multiple switching frequencies that can avoid

the AM radio interference. In addition, 2.1Ch audio

system can be realized by master and slave operation

without beat noise caused by interference between two

ICs. Furthermore, this IC realizes lower power

consumption during small power output, so this product

is most suitable for battery equipped speaker systems

such as wireless speakers.

Features

 Analog Differential Input

 Low Standby Current

 Output Feedback Circuitry prevents sound quality

degradation caused by power supply voltage

fluctuation, achieves low noise and low distortion,

eliminates the need of large electrolytic-capacitors

for decoupling.

 Power limit function

(Linearly-programmable)

 Selectable switching frequency

(AM avoidance function)

 Synchronization control is supported

(Selectable Master and Slave operation)

 Parallel BTL (PBTL) is supported

 Wide voltage range (VCC=4.5V to 13V)

 High efficiency and low-heat-generation make the

system smaller, thinner, and more power-saving

 Pop noise prevention during power supply ON/OFF

 High reliability design by built-in protection circuits

- Overheat protection

- Under voltage protection

- Output short protection

- Output DC voltage protection

 Small package (VQFN032V5050) achieves mount

area reduction

Applications

 Wireless speaker, Small active speaker,

Portable audio equipment, etc.

Key Specifications

 Supply Voltage Range: 4.5V to 13V

 Speaker Output Power: 9W+9W (Typ)

(VCC=12V, RL=8Ω, PLIMIT=0V)

 Total Harmonic Distortion Ratio:

0.03% (Typ) @Po=1W

(VCC=11V, RL=8Ω, PLIMIT=0V)

 Crosstalk: 100dB (Typ)

 PSRR: 55dB (Typ)

 Output Noise Voltage: -80dBV (Typ)

 Standby Current: 0.1µA (Typ)

 Operating Current: 16mA (Typ)

(No load or filter, No signal)

 Operating Temperature Range: -25°C to +85°C

Package W(Typ) x D(Typ) x H(Max)

Ty pical Application Circuit

PLIMIT

IN2P

IN1N

PDX

IN1P

Audio Source

MUTEＸ

ERROR

OUT1P

OUT1N

OUT2P

OUT2N

IN2N

BSP2P

BSP1P

BSP1N

BSP2N

FSEL<2:0>

PDX

MUTEＸ

Other

device

SYNC

GAIN_

MS_SEL

TEST

SP ch1

(Lch)

SP ch2

(Rch)

V

QFN032V5050

5.00mm x 5.00mm x 1.00mm

Figure 1. Typical Application Circuit

Datashee

t

Datasheet

2/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Pin Configuration

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

GNDA

REGG

GAIN_MS_SEL

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

MUTEX

NC

VCCP2

BSP2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

VCCA

VCCP1

BSP1P

OUT1P

NC

Figure 2. Pin Configuration

(TOP VIEW)

Datasheet

3/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Pin Description

No. Pin Name IO Function Internal Equivalent Circuit

1 IN1P I

Positive input pin for Ch1

2 IN1N I

Negative input pin for Ch1

3 PLIMIT I

Power limit level setting pin

4 GNDA -

GND pin for Analog signal

5 REGG O

Internal power supply pin for Gate driver

Please connect a capacitor.

*The REGG terminal of BD28411MUV should not be

used as external supply. Therefore, do not connect

anything except the capacitor for stabilization and the

resistors for setting of GAIN_MS_SEL and PLIMIT.

6 GAIN_MS_SEL I

Gain and Master/Slave mode Setting pin

7 IN2P I

Positive input pin for Ch2

8 IN2N I

Negative input pin for Ch2

9 SYNC I/O

Clock input/output pin to synchronize

multiple class D amplifiers

Datasheet

4/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Pin Description – continued

10 FSEL0 I

PWM frequency setting pin

11 FSEL1 I

PWM frequency setting pin

12 FSEL2 I

PWM frequency setting pin

13 MUTEX I

Speaker output mute control pin

H: Mute OFF

L: Mute ON

14 NC -

Non connection

15 VCCP2 -

Power supply pin for Ch2 PWM signal

Please connect a capacitor.

16 BSP2N O

Boot-strap pin of Ch2 negative PWM signal

Please connect a capacitor.

17 OUT2N O

Output pin of Ch2 negative PWM signal

Please connect to output LPF.

18 GNDP2 -

GND pin for Ch2 PWM signal

19 OUT2P O

Output pin of Ch2 positive PWM signal

Please connect to output LPF.

20 BSP2P O

Boot-strap pin of Ch2 positive PWM signal

Please connect a capacitor.

21 BSP1N O

Boot-strap pin of Ch1 negative PWM signal

Please connect a capacitor.

22 OUT1N O

Output pin of Ch1 negative PWM signal

Please connect to output LPF.

23 GNDP1 -

GND pin for Ch1 PWM signal

24 OUT1P O

Output pin of Ch1 positive PWM signal

Please connect to output LPF.

25 BSP1P O

Boot-strap pin of Ch1 positive PWM signal

Please connect a capacitor.

26 VCCP1 -

Power supply pin for Ch1 PWM signal

Please connect a capacitor.

27 VCCA -

Power supply pin for Analog signal

Please connect a capacitor.

28 NC -

Non connection

29 NC -

Non connection

30 TEST I

Test pin

Please connect to GND.

10

4

100k

Datasheet

5/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Pin Description – continued

31 PDX I

Power down setting pin

H: Active

L: Standby

32 ERROR O

Error flag pin

Please connect to pull-up resistor.

H: Normal

L: Error detected

*An error flag is outputted when Output Short

Protection, DC Voltage Protection, and High

Temperature Protection are operated. This flag shows

IC condition during operation.

The numerical value of internal equivalent circuit is typical value, not guaranteed value.

Datasheet

6/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Block Diagram

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

GNDA

REGG

GAIN_MS_SEL

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

MUTEX

NC

VCCP2

BSP2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

VCCP1

BSP1P

OSC

REGGREGG

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT

CONTROL

I/F OUT1P

VCCA

CONTROL I/F

LDO

Figure 3. Block Diagram

Datasheet

7/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Absolute Maximum Ratings (Ta = 25°C)

Parameter Symbol Rating Unit Applied pins and Conditions

Supply Voltage(Note 1) VCCMAX -0.3 to +15.5 V VCCA,VCCP1,VCCP2

Power Dissipation(Note 2) Pd

3.26(Note 3) W

Please refer to Power Dissipation for details.

4.56(Note 4) W

Input Voltage1(Note 1) V

IN -0.3 to +VREGG V

IN1P, IN1N, IN2P, IN2N, PLIMIT, GAIN_MS_SEL,

PLIMIT, SYNC(Note 5), FSEL0, FSEL1, FSEL2,

PDX, MUTEX

Input Voltage2(Note 1) V

ERR -0.3 to +7 V ERROR

Pin Voltage1(Note 1) (Note 6) V

PIN1 -0.3 to +VCCMAX V

OUT1P, OUT1N, OUT2P, OUT2N

Operating Temperature Topr -25 to +85 °C

Storage Temperature Tstg -55 to +150 °C

Junction Temperature Tjmax +150 °C

(Note 1) The voltage that can be applied reference to GND (Pin4, 18, 23).

(Note 2) Do not exceed Pd and Tjmax=150°C.

(Note 3) Derate by 26.1mW/℃ for operating above Ta=25°C when mounted on 74.2mm × 74.2mm × 1.6mm, FR4, 4-layer glass epoxy board

(Top and bottom layer back copper foil size: 20.2mm2, 2nd and 3rd layer back copper foil size: 5505mm2). There are thermal vias on the board.

(Note 4) Derate by 36.5mW/℃ for operating above Ta=25°C when mounted on 74.2mm × 74.2mm × 1.6mm, FR4, 4-layer glass epoxy board

(Copper area: 5505mm2). There are thermal vias on the board.

(Note 5) SYNC pin is I/O pin. It is specified for input mode.

(Note 6) Please use under this rating including the AC peak waveform (overshoot) for all conditions.

Only undershoot is allowed at condition of ≦15.5V by the VCC reference and ≦10nsec (cf. Figure 4)

Figure 4. Overshoot and Undershoot

Caution: Operating the IC over the absolute maximum ratings may damage the IC. The damage can either be a short circuit between pins or an open circuit

between pins and the internal circuitry. Therefore, it is important to consider circuit protection measures, such as adding a fuse, in case the IC is operated over

the absolute maximum ratings.

Recommended Operating Conditions (Ta= -25°C to +85°C)

Parameter Symbol Min Typ Max Unit Applied pins and Conditions

Supply Voltage VIN 4.5 - 13 V

VCCA, VCCP1, VCCP2

Minimum Load Impedance(Note 7) RL1 5.4 - - Ω BTL

RL2 3.2 - - Ω PBTL

High Level Input Voltage VIH 2.0 - - V

FSEL0, FSEL1, FSEL2,

MUTEX, PDX

Low Level Input Voltage VIL 0 - 0.8 V

FSEL0, FSEL1, FSEL2,

MUTEX, PDX

Low Level Output Voltage VOL - - 0.8 V

ERROR, IOL=0.5mA

(Note 7) Pd should not be exceeded.

15.5V

(

Max

)

15.5V

(

Max

)

GND

VCC

≦10nsec

Overshoot from GND

Undershoot from VCC

Datasheet

8/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Electrical Characteristics

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

Parameter Symbol Min Typ Max Unit Applied pins and Conditions

Quiescent Standby Current ICC1 - 0.1 25 µA

No load or filter,

PDX=L, MUTEX=L

Quiescent Mute Current ICC2 - 10 20 mA

No load or filter,

PDX=H, MUTEX=L

Quiescent Operating Current ICC3 - 16 32 mA

No load or filter, No signal,

PDX=H, MUTEX=H

Regulator Output Voltage VREGG 4.45 5.55 6.05 V PDX=H, MUTEX=H

Input Pull Down Impedance 1 RIN1 70 100 130 kΩ

MUTEX, PDX,

FSEL0, FSEL1, FSEL2,

SYNC(Slave mode only),

Input Pull Down Impedance 2 RIN2 140 200 260 kΩ PLIMIT

Output Power(Note 8) P

O1 - 9 - W VCC=12V, THD+N=10%

Gain 1(Note 8) G

V1 19 20 21 dB

Po=1W,

GAIN_MS_SEL= 0V

Gain 2(Note 8) G

V2 25 26 27 dB

PO=1W ,

GAIN_MS_SEL= 2/9 × VREGG

Gain 3(Note 8) G

V3 31 32 33 dB

PO=1W,

GAIN_MS_SEL= 3/9 × VREGG

Gain 4(Note 8) G

V4 35 36 37 dB

PO=1W,

GAIN_MS_SEL= 4/9 × VREGG

Total Harmonic Distortion(Note 8) THD - 0.03 - %

Po=1W,

BW=20 to 20kHz (AES17)

Crosstalk(Note 8) CT 60 100 - dB Po=1W, 1kHz BPF

PSRR(Note 8) PSRR - 55 - dB Vripple=0.2 VP-P, f=1kHz

Output Noise Level(Note 8) V

NO - -80 -70 dBV Po=0W, BW=IHF-A

PWM (Pulse Width Modulation)

Frequency

fPWM1 564 600 636 kHz

FSEL2=H,

FSEL1=L,

FSEL0=H

fPWM2 470 500 530 kHz

FSEL2=H,

FSEL1=L,

FSEL0=L

fPWM3 376 400 424 kHz

FSEL2=L,

FSEL1=H,

FSEL0=H

(Note 8) The value is specified as typical application. Actual value depends on PCB layout and external components.

Datasheet

9/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

Figure 7. Efficiency vs Output Power

(RL=8Ω)

Figure 8. Efficiency vs Output Power

(RL=6Ω)

0

10

20

30

40

50

60

70

80

90

100

02468101214

Output Power [W/Ch]

Efficiency [%]

VCC=5V VCC=9V VCC=12V

RL=8Ω

0

10

20

30

40

50

60

70

80

90

100

02468101214

Output Power [W/Ch]

Efficiency [%]

RL=6Ω

VCC=5V VCC=9V VCC=12V

0

5

10

15

20

25

30

35

40

45

4 6 8 10 12 14

Current Consumption : I

CC2

, I

CC3

[mA]

Supply Voltage : V

CC

[V]

Figure 5. Circuit Current vs Supply Voltage

(PD)

Figure 6. Circuit Current vs Supply Voltage

(MUTE, ACTIVE)

0

1

2

3

4

5

6

7

8

9

10

4 6 8 101214

Supply Voltage : VCC [V]

Current Consumption : I CC1 [µA]

No load or filter

No signal

“PD”

No load or filter

No signal

“MUTE”

“ACTIVE”

A

CTIVE

with snubber

MUTE

A

CTIVE

without snubbe

r

Datasheet

10/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

0

10

20

30

40

50

60

70

80

90

100

02468101214161820

Output Power [W/Ch]

Efficiency [%]

Figure 9. Efficiency vs Output Power

(PBTL, RL=4Ω)

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

0

2

4

6

8

10

12

14

16

468101214

Supply Voltage : VCC [V]

Output Power [W/Ch]

THD+N=10%

THD+N=1%

Figure 10. Output Power vs Supply Voltage

(RL=8Ω)

RL=8Ω

0

2

4

6

8

10

12

14

16

468101214

Supply Voltage : VCC [V]

Output Power [W/Ch]

Figure 11. Output Power vs Supply Voltage

(RL=6Ω)

RL=6Ω

0

2

4

6

8

10

12

14

16

18

20

22

24

468101214

Supply Voltage : VCC [V]

Output Power [W/Ch]

Figure 12. Output Power vs Supply Voltage

(PBTL, RL=4Ω)

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

THD+N=10%

THD+N=1%

THD+N=10%

THD+N=1%

VCC=5V VCC=9V VCC=12V

Datasheet

11/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

0

0.5

1

1.5

2

2.5

02468101214

Output Power [W/Ch]

Current Consumption : I

CC

[A]

Figure 13. Circuit Current vs Output Power

(RL=8Ω)

RL=8Ω

VCC=5V

VCC=9V

VCC=12V

0

0.5

1

1.5

2

2.5

02468101214

Output Power [W/Ch]

Current Comsumption : I

CC

[A]

Figure 14. Circuit Current vs Output Power

(RL=6Ω)

RL=6Ω

VCC=5V

VCC=9V

VCC=12V

0

0.5

1

1.5

2

2.5

02468101214161820

Output Power [W/Ch]

Current Consumption : I

CC

[A]

Figure 15. Circuit Current vs Output Power

(PBTL, RL=4Ω)

VCC=5V

VCC=9V

VCC=12V

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

Datasheet

12/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

-140

-120

-100

-80

-60

-40

-20

0

10 100 1k 10k 100k

Freq [Hz]

Noise FFT [dBV]

No Signal

RL=8Ω

OUT1

OUT2

16

21

26

31

36

10 100 1k 10k 100k

Freq [Hz]

Voltage Gain [dB]

Figure 16. FFT of Output Noise Voltage

(RL=8Ω)

Figure 17. Voltage Gain vs Freq.

(RL=8Ω)

0.001

0.01

0.1

1

10

0.01 0.1 1 10 100

Po [W]

THD+N [%]

fIN=6kHz

fIN=100Hz

fIN=1kHz

0.001

0.01

0.1

1

10

10 100 1k 10k 100k

Freq [Hz]

THD+N [%]

OUT1

OUT2

Figure 18. THD+N vs Output Power

(RL=8Ω)

Figure 19. THD+N vs Freq.

(RL=8Ω)

PO=1W

RL=8Ω

OUT1

OUT2

fIN=1kHz

fIN=100Hz

fIN=6kHz

BW=20 to 20kHz AES17

RL=8Ω

PO=1W

BW=20 to 20kHz AES17

RL=8Ω

Datasheet

13/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

16

21

26

31

36

10 100 1k 10k 100k

Freq [Hz]

Voltage Gain [dB]

-120

-100

-80

-60

-40

-20

0

0.01 0.1 1 10 100

Po [W]

Crosstalk [dB]

OUT1 to OUT2

OUT2 to OUT1 RL=8Ω

-120

-100

-80

-60

-40

-20

0

10 100 1k 10k 100k

Freq [Hz]

Crosstalk [dB]

OUT1 to OUT2

OUT2 to OUT1 PO=1W

RL=8Ω

Figure 20. Crosstalk vs Output Power

(RL=8Ω)

Figure 21. Crosstalk vs Freq.

(RL=8Ω)

-140

-120

-100

-80

-60

-40

-20

0

10 100 1k 10k 100k

Freq [Hz]

Noise FFT [dBV]

No Signal

RL=6Ω

OUT1

OUT2

Figure 22. FFT of Output Noise Voltage

(RL=6Ω)

PO=1W

RL=6Ω

OUT1

OUT2

Figure 23. Voltage Gain vs Freq.

(RL=6Ω)

Datasheet

14/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

0.001

0.01

0.1

1

10

10 100 1k 10k 100k

Freq [Hz]

THD+N [%]

0.001

0.01

0.1

1

10

0.01 0.1 1 10 100

Po [W]

THD+N [%]

-120

-100

-80

-60

-40

-20

0

0.01 0.1 1 10 100

Po [W]

Crosstalk [dB]

-120

-100

-80

-60

-40

-20

0

10 100 1k 10k 100k

Freq [Hz]

Crosstalk [dB]

BW=20 to 20kHz AES17

RL=6Ω

fIN=6kHz

fIN=100Hz

fIN=1kHz

fIN=100Hz

fIN=6kHz

PO=1W

BW=20 to 20kHz AES17

RL=6Ω

OUT1

OUT2

OUT1 to OUT2

OUT2 to OUT1 RL=6ΩOUT1 to OUT2

OUT2 to OUT1 PO=1W

RL=6Ω

Figure 24. THD+N vs Output Power

(RL=6Ω)

Figure 25. THD+N vs Freq.

(RL=6Ω)

Figure 26. Crosstalk vs Output Power

(RL=6Ω)

Figure 27. Crosstalk vs Freq.

(RL=6Ω)

Datasheet

15/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

0.001

0.01

0.1

1

10

10 100 1k 10k 100k

Freq [Hz]

THD+N [%]

0.001

0.01

0.1

1

10

0.01 0.1 1 10 100

Po [W]

THD+N [%]

16

21

26

31

36

10 100 1k 10k 100k

Freq [Hz]

Voltage Gain [dB]

-140

-120

-100

-80

-60

-40

-20

0

10 100 1k 10k 100k

Freq [Hz]

Noise FFT [dBV]

Figure 28. FFT of Output Noise Voltage

(PBTL, RL=4Ω)

Figure 29. Voltage Gain vs Freq.

(PBTL, RL=4Ω)

Figure 30. THD+N vs Output Power

(PBTL, RL=4Ω)

Figure 31. THD+N vs Freq.

(PBTL, RL=4Ω)

No Signal

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

PO=1W

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

BW=20 to 20kHz AES17

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

fIN=6kHz

fIN=100Hz

fIN=1kHz

fIN=100Hz

fIN=6kHz

PO=1W

BW=20 to 20kHz AES17

PBTL

RL=4Ω

Output LC filter:

L=10μH, C=2.2μF

Datasheet

16/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Typical Performance Curv es

(Unless otherwise specified, Ta=25°C, VCC=11V, fPWM=600kHz, fIN=1kHz, RL=8Ω, PDX=3.3V, MUTEX=3.3V, PLIMT=0V,

Gain=26dB, Output LC filter: L=15μH, C=1μF

when VCC>11V, snubber circuit is added: C=680pF, R=5.6Ω)

0.001

0.01

0.1

1

10

10 100 1k 10k 100k

Freq [Hz]

THD+N [%]

0.001

0.01

0.1

1

10

0.01 0.1 1 10 100

Po [W]

THD+N [%]

fPWM=400kHz

BW=20 to 20kHz AES17

RL=8Ω

fIN=6kHz

fIN=100Hz

fIN=1kHz

fIN=100Hz

fIN=6kHz

fPWM=400kHz

PO=1W

BW=20 to 20kHz AES17

RL=8Ω

OUT1

OUT2

Figure 32. THD+N vs Output Power

(fPWM=400kHz, RL=8Ω)

Figure 33. THD+N vs Freq.

(fPWM=400kHz, RL=8Ω)

OUT1

OUT2

fIN=1kHz

Datasheet

17/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Power up / down sequence

VCCP1

VCCP2

REGG

Speaker

BTL output

(After LC filter)

① Power up VCCP1, VCCP2, VCCA simultaneously.

t

④ Input audio signal.

t

MUTEX

t

IN1P

IN1N

IN2P

IN2N

OUT1P

OUT1N

OUT2P

OUT2N

PDX

②After VCC rises,

please set PDX to High.

t

VCCA

More than

50msec

③After input rises,

please set MUTEX to High.

⑤ Stop audio signal.

⑦ Set PDX to Low.

⑧ Power down VCCP1, VCCP2, VCCA simultaneously.

⑥After input signal stops,

please set MUTEX to Low.

Figure 34. Power Up / Down Sequence

Datasheet

18/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Function Description

(1) Power down and Mute setting

PDX MUTEX

Normal ERROR Detection

PWM output

OUT1P, 1N, 2P, 2N ERROR(Note 10) PWM output

OUT1P, 1N, 2P, 2N ERROR(Note 10)

L L/H

High-Z_Low

(N

o

t

e

9

)

(Power down) H High-Z_Low

(N

o

t

e

9

)

(Power down) H

H L

High-Z_Low

(N

o

t

e

9

)

(MUTE_ON) H High-Z_Low

(N

o

t

e

9

)

(MUTE_ON) L

H H Active

(MUTE_OFF) H High-Z_Low

(N

o

t

e

9

)

(MUTE_ON) L

(Note 9) All power transistors are OFF and output terminals are pulled down by 40kΩ (Typ).

(Note 10) ERROR pin is pulled up by 10kΩ resistor.

(2) Gain and Master/Slave setting

Master/slave and gain are set by GAIN_MS_SEL pin voltage.

REGG

GAIN_MS_SEL

R1

R2

REGG

Setting cannot be changed when IC is active, but it can be set by rebooting (PDX=H to L to H).

Master/Slave Function

This IC has master and slave mode, and it can be synchronized by PWM frequency between two ICs. In master

mode, SYNC pin becomes output pin for synchronization and in slave mode it becomes input pin, so please

connect each SYNC pins. Please set FSEL2/FSEL1/FSEL0 pins to be same each other.

(3) Parallel BTL Function

Parallel BTL mode can be set by connecting IN2P and IN2N pins to GND.

Please short OUT1P – OUT2P, OUT1N – OUT2N near the IC as much as possible.

Parallel BTL mode cannot be set by connecting IN1P and IN1N pins to GND.

R1(Note 11)

(to REGG)

R2(Note 11)

(to GND) Master/Slave Gain Input Impedance

18kΩ Open Slave 36dB 30kΩ

18kΩ 68kΩ Slave 32dB 45.1kΩ

33kΩ 68kΩ Slave 26dB 79.3kΩ

51kΩ 68kΩ Slave 20dB 127.9kΩ

68kΩ 51kΩ Master 36dB 30kΩ

68kΩ 33kΩ Master 32dB 45.1kΩ

68kΩ 18kΩ Master 26dB 79.3kΩ

open 18kΩ Master 20dB 127.9kΩ

Figure 35. GAIN_MS_SEL Pin Setting

Stereo BTL mode Parallel BTL mode

Figure 36. Parallel BTL mode

(Note 11) Please use 1% tolerance resistor.

Datasheet

19/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(4) Power Limit Function

It is possible to limit the maximum output voltage by PLIMIT pin.

Ex.) If PLIMIT is set by R3A=12kΩ and R3B=20kΩ in “Application Information”, output power is limited to about 6.4W.

If power limit function is not needed, connect PLIMIT pin to GND.

(5) FSEL2 / FSEL1 / FSEL0 (AM avoidance function)

FSEL2 / FSEL1 / FSEL0 pins are used for PWM frequency setting. PWM frequency is near to AM radio frequency band

therefore this makes interference during AM radio is used, and may negatively affects reception of AM radio wave. This

interference can be reduced by shift of PWM frequency. Below are the recommended settings. For example, receiving AM

radio wave of 1269kHz in Asia / Europe please set PWM frequency to 500kHz.

Do not set following conditions:

FSEL2=FSEL1=FSEL0=H

FSEL2=H, FSEL1=H, FSEL0=L

FSEL2=L, FSEL1=H, FSEL0=L

FSEL2=L, FSEL1=L, FSEL0=H

FSEL2=FSEL1=FSEL0=L

AM frequency [kHz] Recommended PWM frequency setting

Americas Asia / Europe

fPWM=400kHz

FSEL2=L

FSEL1=H

FSEL0=H

fPWM=500kHz

FSEL2=H

FSEL1=L

FSEL0=L

fPWM=600kHz

FSEL2=H

FSEL1=L

FSEL0=H

522 – 540 ○ - ○

540 – 917 540 – 914 - ○ -

917 – 1125 914 – 1122 ○ - ○

1125 – 1375 1122 – 1373 - ○ -

1375 – 1547 1373 – 1548 ○ - ○

1547 – 1700 1548 – 1701 ○ - ○

Figure 37. Power Limit Figure 38. Power Limit Function [VCC=12V, RL=8Ω] (Typ)

0

2

4

6

8

10

12

0246

PLIMIT pin voltage [V]

Po [W]

Datasheet

20/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Application Information

(1) Application Circuit Example 1 (Stereo BTL, VCC=4.5 to 11V)

Overshoot of output PWM differs according to the board, and etc. Please check to ensure that it is lower than absolute

maximum ratings. If it exceeds the absolute maximum ratings, snubber circuit need to be added, the circuit example is

shown on the next page.

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

NC

BSP2N

GNDP1

OUT1N

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

OSC

REGGREGG

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

3.3V

10kΩ

15µH

Audio

Source

REGG

OUT1P

MUTEX

CONTROL I/F

LDO

1µF

RL=8Ω/6Ω

C24A

C22A

C19A

C17A

C8

C7

C5

C1

R32

R3A

R6B

R3B

R6A

L17A

L19A

L22A

L24A

C2

REGG

BSP1P

VCCP1

10µF

0.1µF

VCCA

4.7µF

0.1µF

C27A

C27B C26B

C26A

VCCVCC

BSP1N

BSP2P

0.68µF

C21

C20

VCCP2

0.1µF 10µF

C15A C15B

VCC

0.68µF

C25

C16

Figure 39. Application Circuit 1

BOM 1 (Stereo BTL, VCC=4.5 to 11V)

Parts Qty. Parts No. Description

Resistor

1 R3A Ref. Function Description (4)Power Limit Function

1 R3B

1 R6A Ref. Function Description (2)Gain and Master/Slave setting

1 R6B

1 R32 100kΩ, 1/16W, J(±5%)

Capacitor

4 C1, C2, C7, C8 1μF, 16V, B(±10%)

1 C5

(N

o

t

e

12)

1μF, 16V, B(±10%)

3 C15A, C26A, C27A

(N

o

t

e

12)

0.1μF, 25V, B(±10%)

2 C15B, C26B

(N

o

t

e

12)

10μF, 25V, B(±10%)

4 C16, C20, C21, C25

(N

o

t

e

12)

0.68μF, 16V, B(±10%)

4 C17A, C19A, C22A, C24A 1μF, 25V, B(±10%)

1 C27B

(N

o

t

e

12)

4.7μF, 25V, B(±10%)

Inductor 4 L17A, L19A, L22A, L24A 15μH, 2.1A, ±20%

(Note 12) Please place it near pin as much as possible.

Datasheet

21/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(2) Application Circuit Example 2 (Stereo BTL, VCC=11 to 13V)

Please add the snubber circuit at OUT pin when VCC=11 to 13V.

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

NC

BSP2N

GNDP1

OUT1N

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

BSP1P

OSC

REGGREGG

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

3.3V

10kΩ

15µH

Audio

Source

REGG

OUT1P

MUTEX

CONTROL I/F

LDO

1µF

RL=8Ω/6Ω

C24A

C22A

C19A

C17A

C8

C7

C1

R32

R3A

R6B

R3B

R6A

L17A

L19A

L22A

L24A

680pF

5.6Ω

C24C

C22C

R24

R22

C2

680pF

5.6Ω

C19C

C17C

R19

R17

VCCP2

0.1µF

C15A

VCC

VCCP1

10µF

0.1µF

VCCA

4.7µF

0.1µF

C27A

C27B C26B

C26A

VCCVCC

BSP1N

BSP2P

0.68µF

C21

C20

0.68µF

C25

C16

1µF

C5 REGG

Figure 40. Application Circuit 2

BOM 2 (Stereo BTL, VCC=11to 13V)

Parts Qty. Parts No. Description

Resistor

1 R3A Ref. Function Description (4)Power Limit Function

1 R3B

1 R6A Ref. Function Description (2)Gain and Master/Slave setting

1 R6B

1 R32 100kΩ, 1/16W, J(±5%)

4 R17, R19, R22, R24 5.6Ω, 1/10W, J(±5%)

Capacitor

4 C1, C2, C7, C8 1μF, 16V, B(±10%)

1 C5

(N

o

t

e

13

)

1μF, 16V, B(±10%)

3 C15A, C26A, C27A

(N

o

t

e

13

)

0.1μF, 25V, B(±10%)

2 C15B, C26B

(N

o

t

e

13

)

10μF, 25V, B(±10%)

4 C16, C20, C21, C25

(N

o

t

e

13

)

0.68μF, 16V, B(±10%)

4 C17A, C19A, C22A, C24A 1μF, 25V, B(±10%)

4 C17C, C19C, C22C,

C24C(Note 13) 680pF, 25V, B(±10%)

1 C27B

(N

o

t

e

13

)

4.7μF, 25V, B(±10%)

Inductor 4 L17A, L19A, L22A, L24A 15μH, 2.1A, ±20%

(Note 13) Please place it near pin as much as possible.

Snubber circuit

Datasheet

22/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(3) Application Circuit Example 3 (Monaural PBTL, VCC=4.5 to 11V)

Overshoot of output PWM differs according to the board, and etc. Please check to ensure that it is lower than absolute

maximum ratings. If it exceeds the absolute maximum ratings, snubber circuit need to be added, the circuit example is

shown on the next page.

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

NC

BSP2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

BSP1P

OSC

REGGREGG

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

3.3V

10kΩ

10µH

0.68µF

Audio

Source

REGG

OUT1P

MUTEX

CONTROL I/F

LDO

2.2µF

0.68µF

1µF

RL=4Ω

C24B

C22B

C21

C20

C1

R32

R3A

R6B

R3B

R6A

L22B

L24B

C2

VCCP2

0.1µF 10µF

C15A C15B

VCC

VCCP1

10µF

0.1µF

VCCA

4.7µF

0.1µF

C27A

C27B C26B

C26A

VCC

0.68µF

C25

C16

1µF

C5 REGG

Figure 41. Application Circuit 3

BOM 3 (Monaural PBTL, VCC=4.5 to 11V)

Parts Qty. Parts No. Description

Resistor

1 R3A Ref. Function Description (4)Power Limit Function

1 R3B

1 R6A Ref. Function Description (2)Gain and Master/Slave setting

1 R6B

1 R32 100kΩ, 1/16W, J(±5%)

Capacitor

4 C1, C2, C7, C8 1μF, 16V, B(±10%)

1 C5

(N

o

t

e

14

)

1μF, 16V, B(±10%)

3 C15A, C26A, C27A

(N

o

t

e

14

)

0.1μF, 25V, B(±10%)

2 C15B, C26B

(N

o

t

e

14

)

10μF, 25V, B(±10%)

4 C16, C20, C21, C25 0.68μF, 16V, B(±10%)

2 C22B, C24B

(N

o

t

e

14

)

2.2μF, 25V, B(±10%)

1 C27B 4.7μF, 25V, B(±10%)

Inductor 2 L22B, L24B 10μH, 2.6A, ±20%

(Note 14) Please place it near pin as much as possible.

Datasheet

23/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(4) Application Circuit Example 4 (Monaural PBTL, VCC=11 to 13V)

Please add the snubber circuit at OUT pin when VCC=11 to 13V.

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

SYNC

FSEL0

FSEL1

FSEL2

NC

BSP2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

ERROR

PDX

TEST

NC

BSP1P

OSC

REGGREGG

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

10kΩ

10µH

Audio

Source

REGG

OUT1P

MUTEX

CONTROL I/F

LDO

2.2µF

1µF

RL=4Ω

C24B

C22B

C1

R32

R3A

R6B

R3B

R6A

L22B

L24B

680pF

5.6Ω

C24C

C22C

R24

R22

C2

3.3V

VCCP2

0.1µF 10µF

C15A C15B

VCC

0.68µF

C21

C20

VCCP1

10µF

0.1µF

VCCA

4.7µF

0.1µF

C27A

C27B C26B

C26A

VCC

0.68µF

C25

C16

1µF

C5 REGG

Figure 42. Application Circuit 4

BOM 4 (Monaural PBTL, VCC=11 to 13V)

Parts Qty. Parts No. Description

Resistor

1 R3A Ref. Function Description (4)Power Limit Function

1 R3B

1 R6A Ref. Function Description (2)Gain and Master/Slave setting

1 R6B

1 R32 100kΩ, 1/16W, J(±5%)

2 R22, R24

(N

o

t

e

15

)

5.6Ω, 1/10W, J(±5%)

Capacitor

4 C1, C2, C7, C8 1μF, 16V, B(±10%)

1 C5

(N

o

t

e

15

)

1μF, 16V, B(±10%)

3 C15A, C26A, C27A

(N

o

t

e

15

)

0.1μF, 25V, B(±10%)

2 C15B, C26B

(N

o

t

e

15

)

10μF, 25V, B(±10%)

4 C16, C20, C21, C25

(N

o

t

e

15

)

0.68μF, 16V, B(±10%)

2 C22B, C24B 2.2μF, 25V, B(±10%)

2 C22C, C24C

(N

o

t

e

15

)

680pF, 25V, B(±10%)

1 C27B

(N

o

t

e

15

)

4.7μF, 25V, B(±10%)

Inductor 2 L22B, L24B 10μH, 2.6A, ±20%

(Note 15) Please place it near pin as much as possible.

Datasheet

24/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(5) Application Example 5 (MASTER/SLAVE mode, VCC=4.5 to 11V)

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

OSC

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

3.3V

10kΩ

10µH

Audio

Source

REGG2

OUT1P

CONTROL I/F

LDO

2.2µF

1µF

RL=4Ω

C24Bs

C22Bs

C1s

R32s

R3As

R6Bs

R3Bs

R6As

L22Bs

L24Bs

C2s

910 11 12 13 14 15 16

8

7

6

5

4

3

2

1

32 31 30 29 28 27 26 25

17

18

19

20

21

22

23

24

IN1P

IN1N

PLIMIT

REGG

GAIN_MS_SEL

GNDA

IN2P

IN2N

GNDP1

OUT1N

BSP1N

BSP2P

OUT2P

GNDP2

OUT2N

OSC

REGG

DRIVER

FET

DRIVER

FET

DRIVER

FET

DRIVER

FET

REGG

PWM

PLIMIT

GAIN

PROTECT CONTROL

I/F

3.3V

10kΩ

15µH

0.68µF

Audio

Source

REGG1

OUT1P

CONTROL I/F

LDO

1µF

0.68µF

1µF

RL=8Ω/6Ω

C24Am

C22Am

C21m

C20m

C19Am

C17Am

C8m

C7m

C1m

R32m

R3Am

R6Bm

R3Bm

R6Am

L17Am

L19Am

L22Am

L24Am

C2m

68kΩ

18kΩ

33kΩ

68kΩ

0.1µF 10µF

C15Am C15Bm

VCC

10µF

0.1µF

4.7µF

0.1µF

C27Am

C27Bm C26Bm

C26Am

VCC

0.1µF 10µF

C15As C15Bs

VCC

0.68µF

C25s

C16s

0.68µF

C25m

C16m

0.68µF

C21s

C20s

10µF

0.1µF

4.7µF

0.1µF

C27As

C27Bs C26Bs

C26As

VCC

1µF

C5m

REGG1

1µF

C5s

REGG2

Maste

r

Slave

Figure 43. Application Circuit 5

This GAIN_MS_SEL setting is one example,

so another Gain setting can be used.

Datasheet

25/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

About the Protection Function

Protection

Function Detecting & Releasing Condition PWM Output

OUT1P, 1N, 2P, 2N ERROR(Note 16)

Output short

protection

Detecting

condition Detecting current = 8A (Typ) High-Z_Low

(Latch)(Note17)

L

(Latch) (Note17)

DC voltage

protection

Detecting

condition

DC voltage is over 3.5V for a period of 0.33sec

to 0.66sec at speaker output

High-Z_Low

(Latch) (Note17)

L

(Latch) (Note17)

Overheat

protection

Detecting

condition Chip temperature to be over 150°C (Typ) High-Z_Low

L

Releasing

condition Chip temperature to be below 120°C (Typ) Normal

operation

Under voltage

protection

Detecting

condition Power supply voltage to be below 4.0V (Typ) High-Z_Low

H

Releasing

condition Power supply voltage to be above 4.1V (Typ) Normal

operation

(Note 16) ERROR pin is pulled up by 10kΩ resistor.

(Note 17) Once an IC is latched, the circuit is not released automatically even after an abnormal status is gone.

The following procedures ① or ② is available for recovery.

① After turning MUTEX terminal to Low (holding time to Low = 10msec (Min)) turn back to High again.

② Restore power supply after dropping to power supply voltage VCC < 3V (10msec (Min) holding) which internal power on reset circuit activates.

Datasheet

26/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(1) Output Short Protection (short to the power supply)

This IC has the PWM output short protection circuit that stops the PWM output when the output speaker (after LC-filter) is

short-circuited to the power supply due to abnormality.

Detecting condition - It will detect when MUTEX pin is set High and the current that flows into the PWM output pin

becomes 8A(Typ) or more. If detected, the PWM output instantaneously goes to the state of

High-Z_Low and IC is latch.

Releasing method - ① After turning MUTEX terminal to Low(holding time to Low = 10msec(Min)) turn back to High

again.

② Restore power supply after the voltage dropped to internal power on reset circuit activating

power supply voltage VCC＜3V (hold for 10msec (Min)).

t

8A(Typ)

t

250nsec(Typ)

t

Short to VCC Release from short to VCC

PWM out  IC latches with High-Z_Low Released from latch state

Over-Current

Latch release

10msec(Min)

ERROR

OUT1P

OUT1N

OUT2P

OUT2N

MUTEX

Figure 44. Output Short Protection Sequence

(Short to Power Supply)

Datasheet

27/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(2) Output Short Protection (Short to GND)

This IC has the PWM output short protection circuit that stops the PWM output when the output speaker (after LC-filter) is

short-circuited to GND due to abnormality.

Detecting condition - It will detect when MUTEX pin is set High and the current that flows into the PWM output terminal

becomes 8A(Typ) or more. If detected, the PWM output instantaneously goes to the state of

High-Z_Low and IC is latched.

Releasing method - ① After turning MUTEX terminal to Low(holding time to Low = 10msec(Min)) turn back to High

again.

② Restore power supply after the voltage dropped to internal power on reset circuit activating

power supply voltage VCC＜3V (hold for 10msec (Min)).

250nsec(Typ)

t

8A(Typ)

t

Short to GND Release from short to GND

PWM out IC latches with High-Z_Low Released from latch state

Latch release

10msec(Min)

Over-Current

ERROR

OUT1P

OUT1N

OUT2P

OUT2N

MUTEX

Figure 45. Sequence of the Output short protection

(Short to GND)

Datasheet

28/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(3) DC Voltage Protection

This IC is integrated with DC voltage protection circuit. When DC voltage is input to the speaker due to abnormality,

speaker output will MUTE, and this protection will prevent the speaker from destruction.

Detecting condition - It will detect when MUTEX pin is set High and speaker output is more than 3.5V(Typ) over 0.33sec

to 0.66sec.

Once detected, The PWM output instantaneously goes to the state of High-Z_Low, and IC will latch.

Releasing method - ① After turning MUTEX terminal to Low(holding time to Low = 10msec(Min)) turn back to High

again.

② Restore power supply after the voltage dropped to internal power on reset circuit activating

power supply voltage VCC＜3V (hold for 10msec (Min)).

t

Released from latch state

PWM out : IC latches with High-Z_Low

Output stops by being inputted DC voltage twice.

Detection time is 0.33sec to 0.66sec.

Latch is released

Abnormal condition

Impress DC voltage to speaker output over 3.5V Release abnormal condition

10msec(Min)

3.5V

-3.5V

Speaker

Output

ERROR

OUT1P

OUT1N

OUT2P

OUT2N

MUTEX

Output is monitored in the

interval of 0.33sec

0.33sec 0.33sec 0.33sec 0.33sec 0.33sec 0.33sec 0.33sec 0.33sec

Figure 46. DC Voltage Protection Sequence

Datasheet

29/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(4) Overheat Protection

This IC has the overheat protection circuit that prevents thermal runaway under an abnormal state for the chip temperature

exceeded Tjmax=150°C.

Detecting condition - It will detect when MUTEX pin is set High and the temperature of the chip becomes 150°C (Typ) or

more. Speaker output turns MUTE immediately, when High temperature protection is detected.

Releasing condition - It will release when MUTEX pin is set High and the temperature of the chip becomes 120°C (Typ)

or less. The speaker output is outputted immediately when released. (Auto recovery)

Tj

Speaker

Output

High-Z_Low

150°C

120°C

ERROR

t

OUT1P

OUT1N

OUT2P

OUT2N

Figure 47. Overheat Protection Sequence

Datasheet

30/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

(5) Under Voltage Protection

This IC has the under voltage protection circuit that mutes the output speaker once extreme drop in the power supply

voltage is detected.

Detecting condition - It will detect when MUTEX pin is set High and the power supply voltage becomes lower than

4V(Typ).Speaker output turn MUTE immediately when under voltage protection is detected.

Releasing condition - It will release when MUTEX pin is set High and the power supply voltage becomes more than

4.1V(Typ).The speaker output is outputted immediately when released. (Auto recovery)

Figure 48. Under Voltage Protection Sequence

Datasheet

31/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Selecting External Components

(1) Output LC Filter Circuit

An output filter is required to eliminate radio-frequency components exceeding the audio-frequency region supplied to a

load (speaker). Because this IC uses output PWM frequencies any of 400kHz, 500kHz, or 600kHz, the high-frequency

components must be appropriately removed.

This section takes an example of an LC type LPF shown below, in which coil L and capacitor C compose a differential filter

with an attenuation property of -12dB/oct. A large part of switching currents flow to capacitor C, and only a small part of the

currents flow to speaker RL. This filter reduces unwanted emission this way. In addition, coil L and capacitor C compose a

filter against in-phase components, reducing unwanted emission further.

Use inductors with low ESR and with sufficient margin of allowable currents. Power loss will increase if inductors with

high ESR are used.

Select a closed magnetic circuit type product in normal cases to prevent emission noise.

Use capacitors with low equivalent series resistance, and good impedance characteristics at high frequency ranges

(100kHz or higher). Also, select an item with sufficient voltage rating because massive amount of high-frequency

current flow is expected.

(2) Snubber circuit constant

When overshoot / undershoot of PWM Output exceeds absolute maximum rating, or when overshoot / undershoot of PWM

output negatively affects EMC, snubber circuit is used as shown below. And if VCC>11V, the snubber circuit must be added.

Caution1: If the impedance characteristics of the speakers at high-frequency range increase rapidly, the IC might not have

stable operation in the resonance frequency range of the LC filter. Therefore, consider adding damping-circuit, etc.,

depending on the impedance of the speaker.

Caution2: Though this IC has a short protection function, when short to VCC or GND after the LC filter, over current occurs

during short protection function operation. Be careful about over/undershoot which exceeds the maximum standard

ratings because back electromotive force of the inductor will occur which sometimes leads to IC destruction.

RL L C fC

4Ω 10μH 2.2μF 34kHz

6Ω, 8Ω 15μH 1μF 41kHz

RL C R

4Ω 680pF, 25V B(±10%) 5.6Ω, 1/10W J(±5%)

6Ω 680pF, 25V B(±10%) 5.6Ω, 1/10W J(±5%)

8Ω 680pF, 25V B(±10%) 5.6Ω, 1/10W J(±5%)

Figure 49. Output LC Filter

PWM

GNDP

VCCP

R

C

Snubber

c

ir

cu

i

t

LC filter

c

ir

cu

i

t

OUT

The following table shows ROHM recommended value of

“Snubber filter constants” when using ROHM 4 layer board.

The following shows output LC filter constants

and cutoff frequencies fC with typical load impedances.

Figure 50. Snubber circuit

RL

C

L

C

L

OUT*P

OUT*N

Datasheet

32/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Power Dissipation

Figure 51. Power Dissipation vs Temperature

Measuring instrument : TH-156(Kuwano Electrical Instruments Co, Ltd.)

Measuring conditions : Installation on ROHM’s board

Board size : 74.2mm x 74.2mm x 1.6mm(with thermal via on board)

Material : FR4

・The board on exposed heat sink on the back of package are connected by soldering.

PCB1 : 4- layer board (Top and bottom layer back copper foil size: 20.2mm2, 2nd and 3rd layer

back copper foil size: 5505mm2) , θ ja = 38.3°C/W

PCB2 : 4-layer board(back copper foil size: 5505mm2), θ ja = 27.4°C /W

Use a thermal design that allows for a sufficient margin in consideration of power dissipation (Pd) under actual operating

conditions. This IC exposes its frame of the backside of package. Note that this part is assumed to use after providing heat

dissipation treatment to improve heat dissipation efficiency. Try to occupy as wide as possible with heat dissipation pattern

not only on the board surface but also the backside.

Class D speaker amplifier has a high efficiency and low heat generation by comparison with conventional Analog power

amplifier. However, In case it is operated continuously by maximum output power, Power dissipation (Pdiss) may exceed

package dissipation. Please consider about heat design that Power dissipation (Pdiss) does not exceed Package

dissipation (Pd) in average power (Poav).

Package dissipation : Pd(W) = (Tjmax – Ta) / θ ja

Power dissipation : Pdiss(W) = Poav x (1/η – 1)

Where:

Tjmax is the maximum junction temperature=150°C,

Ta is the peripheral temperature [°C]

θ ja is the thermal resistance of package [°C /W]

Poav is the average power [W]

η is the efficiency

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

0 25 50 75 100 125 150

Ta [℃]

Pd [W]

PCB② 4.56W

PCB① 3.26W

Package:

VQFN032V5050

Datasheet

33/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Operational Notes

1. Reverse Connection of Power Supply

Connecting the power supply in reverse polarity can damage the IC. Take precautions against reverse polarity when

connecting the power supply, such as mounting an external diode between the power supply and the IC’s power supply

terminals.

2. Power Supply Lines

Design the PCB layout pattern to provide low impedance supply lines. Furthermore, connect a capacitor to ground at

all power supply pins. Consider the effect of temperature and aging on the capacitance value when using electrolytic

capacitors.

3. Ground Voltage

Ensure that no pins are at a voltage below that of the ground pin at any time, even during transient condition.

4. Ground Wiring Pattern

When using both small-signal and large-current ground traces, the two ground traces should be routed separately but

connected to a single ground at the reference point of the application board to avoid fluctuations in the small-signal

ground caused by large currents. Also ensure that the ground traces of external components do not cause variations

on the ground voltage. The ground lines must be as short and thick as possible to reduce line impedance.

5. Thermal Consideration

Should by any chance the power dissipation rating be exceeded the rise in temperature of the chip may result in

deterioration of the properties of the chip. In case of exceeding this absolute maximum rating, increase the board size

and copper area to prevent exceeding the Pd rating.

6. Recommended Operating Conditions

These conditions represent a range within which the expected characteristics of the IC can be approximately obtained.

The electrical characteristics are guaranteed under the conditions of each parameter.

7. Inrush Current

When power is first supplied to the IC, it is possible that the internal logic may be unstable and inrush current may flow

instantaneously due to the internal powering sequence and delays, especially if the IC has more than one power supply.

Therefore, give special consideration to power coupling capacitance, power wiring, width of ground wiring, and routing

of connections.

8. Operation Under Strong Electromagnetic Field

Operating the IC in the presence of a strong electromagnetic field may cause the IC to malfunction.

9. Testing on Application Boards

When testing the IC on an application board, connecting a capacitor directly to a low-impedance output pin may subject

the IC to stress. Always discharge capacitors completely after each process or step. The IC’s power supply should

always be turned off completely before connecting or removing it from the test setup during the inspection process. To

prevent damage from static discharge, ground the IC during assembly and use similar precautions during transport and

storage.

10. Inter-pin Short and Mounting Errors

Ensure that the direction and position are correct when mounting the IC on the PCB. Incorrect mounting may result in

damaging the IC. Avoid nearby pins being shorted to each other especially to ground, power supply and output pin.

Inter-pin shorts could be due to many reasons such as metal particles, water droplets (in very humid environment) and

unintentional solder bridge deposited in between pins during assembly to name a few.

11. Unused Input Terminals

Input terminals of an IC are often connected to the gate of a MOS transistor. The gate has extremely high impedance

and extremely low capacitance. If left unconnected, the electric field from the outside can easily charge it. The small

charge acquired in this way is enough to produce a significant effect on the conduction through the transistor and

cause unexpected operation of the IC. So unless otherwise specified, unused input terminals should be connected to

the power supply or ground line.

Datasheet

34/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Operational Notes – continued

12. Regarding Input Pins of the IC

This monolithic IC contains P+ isolation and P substrate layers between adjacent elements in order to keep them

isolated. P-N junctions are formed at the intersection of the P layers with the N layers of other elements, creating a

parasitic diode or transistor. For example (refer to figure below):

When GND > Pin A and GND > Pin B, the P-N junction operates as a parasitic diode.

When GND > Pin B, the P-N junction operates as a parasitic transistor.

Parasitic diodes inevitably occur in the structure of the IC. The operation of parasitic diodes can result in mutual

interference among circuits, operational faults, or physical damage. Therefore, conditions that cause these diodes to

operate, such as applying a voltage lower than the GND voltage to an input pin (and thus to the P substrate) should be

avoided.

Figure 52. Example of Monolithic IC Structure

13. Ceramic Capacitor

When using a ceramic capacitor, determine the dielectric constant considering the change of capacitance with

temperature and the decrease in nominal capacitance due to DC bias and others.

14. Thermal Shutdown Circuit (TSD)

This IC has a built-in thermal shutdown circuit that prevents heat damage to the IC. Normal operation should always be

within the IC’s power dissipation rating. If however the rating is exceeded for a continued period, the junction

temperature (Tj) will rise which will activate the TSD circuit that will turn OFF all output pins. When the Tj falls below the

TSD threshold, the circuits are automatically restored to normal operation.

Note that the TSD circuit operates in a situation that exceeds the absolute maximum ratings and therefore, under no

circumstances, should the TSD circuit be used in a set design or for any purpose other than protecting the IC from heat

damage.

15. Over Current Protectio n Circuit (OCP)

This IC has a built-in overcurrent protection circuit that activates when the output is accidentally shorted. However, it is

strongly advised not to subject the IC to prolonged shorting of the output.

Datasheet

35/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Ordering Information

B D 2 8 4 1 1 M U V

-E 2

Part Number Package

MUV: VQFN032V5050

Packaging and forming specification

E2: Embossed tape and reel

Marking Diagram

VQFN032V5050 (TOP VIEW)

D28411

Part Number Marking

LOT Number

1PIN MARK

Datasheet

36/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Physical Dimension, Tape and Reel Information

Package Name VQFN032V5050

∗

Order quantity needs to be multiple of the minimum quantity.

Embossed carrier tapeTape

Quantity

Direction

of feed

The direction is the 1pin of product is at the upper left when you hold

reel on the left hand and you pull out the tape on the right hand

2500pcs

E2

()

Direction of feed

Reel 1pin

Datasheet

37/37 TSZ02201-0C1C0E900220-1-2

www.rohm.com

TSZ22111 • 15 • 001

BD28411MUV

Revision History

Date Revision Changes

29.Oct.2014 001 First version

Notice-GE Rev.003

Notice

Precaution on using ROHM Products

1. Our Products are designed and manufactured for application in ordinary electronic equipments (such as AV equipment,

OA equipment, telecommunication equipment, home electronic appliances, amusement equipment, etc.). If you

intend to use our Products in devices requiring extremely high reliability (such as medical equipment (Note 1), transport

equipment, traffic equipment, aircraft/spacecraft, nuclear power controllers, fuel controllers, car equipment including car

accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or

serious damage to property (“Specific Applications”), please consult with the ROHM sales representative in advance.

Unless otherwise agreed in writing by ROHM in advance, ROHM shall not be in any way responsible or liable for any

damages, expenses or losses incurred by you or third parties arising from the use of any ROHM’s Products for Specific

Applications.

(Note1) Medical Equipment Classification of the Specific Applications

JAPAN

USA

EU

CHINA

CLASSⅢ

CLASSⅡb

CLASSⅢ

CLASSⅣ

CLASSⅢ

2. ROHM designs and manufactures its Products subject to strict quality control system. However, semiconductor

products can fail or malfunction at a certain rate. Please be sure to implement, at your own responsibilities, adequate

safety measures including but not limited to fail-safe design against the physical injury, damage to any property, which

a failure or malfunction of our Products may cause. The following are examples of safety measures:

[a] Installation of protection circuits or other protective devices to improve system safety

[b] Installation of redundant circuits to reduce the impact of single or multiple circuit failure

3. Our Products are designed and manufactured for use under standard conditions and not under any special or

extraordinary environments or conditions, as exemplified below. Accordingly, ROHM shall not be in any way

responsible or liable for any damages, expenses or losses arising from the use of any ROHM’s Products under any

special or extraordinary environments or conditions. If you intend to use our Products under any special or

extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of

product performance, reliability, etc, prior to use, must be necessary:

[a] Use of our Products in any types of liquid, including water, oils, chemicals, and organic solvents

[b] Use of our Products outdoors or in places where the Products are exposed to direct sunlight or dust

[c] Use of our Products in places where the Products are exposed to sea wind or corrosive gases, including Cl2,

H2S, NH3, SO2, and NO2

[d] Use of our Products in places where the Products are exposed to static electricity or electromagnetic waves

[e] Use of our Products in proximity to heat-producing components, plastic cords, or other flammable items

[f] Sealing or coating our Products with resin or other coating materials

[g] Use of our Products without cleaning residue of flux (even if you use no-clean type fluxes, cleaning residue of

flux is recommended); or Washing our Products by using water or water-soluble cleaning agents for cleaning

residue after soldering

[h] Use of the Products in places subject to dew condensation

4. The Products are not subject to radiation-proof design.

5. Please verify and confirm characteristics of the final or mounted products in using the Products.

6. In particular, if a transient load (a large amount of load applied in a short period of time, such as pulse. is applied,

confirmation of performance characteristics after on-board mounting is strongly recommended. Avoid applying power

exceeding normal rated power; exceeding the power rating under steady-state loading condition may negatively affect

product performance and reliability.

7. De-rate Power Dissipation (Pd) depending on Ambient temperature (Ta). When used in sealed area, confirm the actual

ambient temperature.

8. Confirm that operation temperature is within the specified range described in the product specification.

9. ROHM shall not be in any way responsible or liable for failure induced under deviant condition from what is defined in

this document.

Precaution for Mounting / Circuit board design

1. When a highly active halogenous (chlorine, bromine, etc.) flux is used, the residue of flux may negatively affect product

performance and reliability.

2. In principle, the reflow soldering method must be used on a surface-mount products, the flow soldering method must

be used on a through hole mount products. If the flow soldering method is preferred on a surface-mount products,

please consult with the ROHM representative in advance.

For details, please refer to ROHM Mounting specification

Notice-GE Rev.003

Precautions Regarding Application Examples and External Circuits

1. If change is made to the constant of an external circuit, please allow a sufficient margin considering variations of the

characteristics of the Products and external components, including transient characteristics, as well as static

characteristics.

2. You agree that application notes, reference designs, and associated data and information contained in this document

are presented only as guidance for Products use. Therefore, in case you use such information, you are solely

responsible for it and you must exercise your own independent verification and judgment in the use of such information

contained in this document. ROHM shall not be in any way responsible or liable for any damages, expenses or losses

incurred by you or third parties arising from the use of such information.

Precaution for Electrostatic

This Product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. Please take proper

caution in your manufacturing process and storage so that voltage exceeding the Products maximum rating will not be

applied to Products. Please take special care under dry condition (e.g. Grounding of human body / equipment / solder iron,

isolation from charged objects, setting of Ionizer, friction prevention and temperature / humidity control).

Precaution for Storage / Transportation

1. Product performance and soldered connections may deteriorate if the Products are stored in the places where:

[a] the Products are exposed to sea winds or corrosive gases, including Cl2, H2S, NH3, SO2, and NO2

[b] the temperature or humidity exceeds those recommended by ROHM

[c] the Products are exposed to direct sunshine or condensation

[d] the Products are exposed to high Electrostatic

2. Even under ROHM recommended storage condition, solderability of products out of recommended storage time period

may be degraded. It is strongly recommended to confirm solderability before using Products of which storage time is

exceeding the recommended storage time period.

3. Store / transport cartons in the correct direction, which is indicated on a carton with a symbol. Otherwise bent leads

may occur due to excessive stress applied when dropping of a carton.

4. Use Products within the specified time after opening a humidity barrier bag. Baking is required before using Products of

which storage time is exceeding the recommended storage time period.

Precaution for Product Label

QR code printed on ROHM Products label is for ROHM’s internal use only.

Precaution for Disposition

When disposing Products please dispose them properly using an authorized industry waste company.

Precaution for Foreign Exchange and Foreign Trade act

Since our Products might fall under controlled goods prescribed by the applicable foreign exchange and foreign trade act,

please consult with ROHM representative in case of export.

Precaution Regarding Intellectual Property Rights

1. All information and data including but not limited to application example contained in this document is for reference

only. ROHM does not warrant that foregoing information or data will not infringe any intellectual property rights or any

other rights of any third party regarding such information or data. ROHM shall not be in any way responsible or liable

for infringement of any intellectual property rights or other damages arising from use of such information or data.:

2. No license, expressly or implied, is granted hereby under any intellectual property rights or other rights of ROHM or any

third parties with respect to the information contained in this document.

Other Precaution

1. This document may not be reprinted or reproduced, in whole or in part, without prior written consent of ROHM.

2. The Products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written

consent of ROHM.

3. In no event shall you use in any way whatsoever the Products and the related technical information contained in the

Products or this document for any military purposes, including but not limited to, the development of mass-destruction

weapons.

4. The proper names of companies or products described in this document are trademarks or registered trademarks of

ROHM, its affiliated companies or third parties.

DatasheetDatasheet

Notice – WE Rev.001

General Precaution

1. Before you use our Pro ducts, you are requested to care fully read this document and fully understand its contents.

ROHM shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny

ROHM’s Products against warning, caution or note contained in this document.

2. All information contained in this docume nt is current as of the issuing date and subj ect to change without any prior

notice. Before purchasing or using ROHM’s Products, please confirm the la test information with a ROHM sale s

representative.

3. The information contained in this doc ument is provi ded on an “as is” basis and ROHM does not warrant that all

information contained in this document is accurate an d/or error-free. ROHM shall not be in an y way responsible or

liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or

concerning such information.