1
TPF6
32
A
/
TPF
605
A
/
TPF
607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
Features
3-VRMS Output into 2.5kΩ Load with 5V Supply
2-VRMS Output into 2.5kΩ Load with 3.3V Supply
Integrated Charge Pump Generates Negative
Supply Rail
SNR Enhanced
PVDD Power Off Delay Function
Low THD+N: 0.001%
Drives 600Ω Load
Stable with 220pF Capacitive Load
Pop-Free Under-Voltage Protection
(TPF632A/605A)
Pop-Free Enable Control
–40°C to 85°C Operation Range
Robust 8kV (Output-Pin) HBM ESD Rating On All
Pins
Robust 2kV CDM ESD Rating
Green, Popular Type Package
Applications
Set-Top Box
Blue-ray and HD DVD Players
PDP TV and LCD TV
Description
The 3PEAK TPF632A/605A/607A are 3-VRMS
pop-free stereo line drivers with the integrated
charge pump generating the negative supply rail
which allows the removal of the output DC-blocking
capacitors. The devices are capable of driving
3-VRMS into a 2.5-kΩ load with single 5V supply
voltage. The TPF632A has differential inputs, the
TPF605A/607A support single-ended inputs, and all
can use external resistors for flexible gain setting.
The 3PEAK TPF632A/605A/607A has built-in
enable/shutdown control for pop-free on/off control.
The TPF632A/605A has an external under-voltage
detector that mutes the output when monitored
voltage drop below set value. Using the
TPF632A/605A/607A in audio products can reduce
component count considerably compared to
traditional methods of generating a 3-VRMS output.
The device needs only a single 5V supply to
generate 8.5-VPP output while traditional op-amp
requires a split-rail power supply to achieve same.
The device is ideal for single-supply electronics
where size and cost are critical design parameters.
3PEAK and the 3PEAK logo are registered trademarks of
3PEAK INCORPORATED. All other trademarks are the property
of their respective owners.
Pin Configuration
(Top View)
Audio Line Drivers
Part
Number Package Remarks
TPF632A TSSOP-14 5V/3.3V,Differential inputs
TPF605A MSOP-10-EP 5V/3.3V, Single-ended inputs
TPF607A MSOP-10 Single-ended inputs, no UVP
control
TPF632A
14-Pin TSSOP
14
13
12
11
10
9
8
6
5
7
3
2
1
4
+INR
OUTR
-INR
+INL
OUTL
-INL
CN
EN
PVSS
CP
PGND
PVDD
UVP
GND UVP
Charge
Pump
TPF605A
10-Pin MSOP-EP
TPF607A
10-Pin MSOP
10
9
8
7
65
3
2
1
4
OUTR
-INR
OUTL
-INL
CN
EN
PVSS
CP
PVDD
UVP
UVP
Charge
Pump
GND
10
9
8
7
65
3
2
1
4
OUTR
-INR
OUTL
-INL
CN
EN
PVSS
CP
PVDD
GND
Charge
Pump
2
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
Order Information
Model Name Order Number Package Transport Media, Quantity Marking
Information
TPF632A TPF632A-TR 14-Pin TSSOP Tape and Reel, 3000 TPF632A
TPF605A TPF605A-VR 10-Pin MSOP-EP Tape and Reel, 3000 TPF605A
TPF607A TPF607A-VR 10-Pin MSOP Tape and Reel, 3000 TPF607A
Absolute Maximum Ratings
Note 1
Supply Voltage: V+ – V–....................................6.0V
Input Voltage............................. V– – 0.3 to V+ + 0.3
Input Current: +IN, –IN, SHDN Note 2.............. ±10mA
EN Pin Voltage……………………………V– to V+
Output Current: OUT.................................... ±20mA
Output Short-Circuit Duration Note 3…......... Indefinite
Operating Temperature Range.......–40°C to 125°C
Maximum Junction Temperature................... 150°C
Storage Temperature Range.......... –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ......... 260°C
Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum
Rating condition for extended periods may affect device reliability and lifetime.
Note 2: The inputs are protected by ESD protection diodes to each power supply. If the input extends more than 500mV beyond the power supply, the input
current should be limited to less than 10mA.
Note 3: A heat sink may be required to keep the junction temperature below the absolute maximum. This depends on the power supply voltage and how many
amplifiers are shorted. Thermal resistance varies with the amount of PC board metal connected to the package. The specified values are for short traces
connected to the leads.
ESD, Electrostatic Discharge Protection
Pin Symbol Parameter Condition Minimum Level Unit
All HBM Human Body Model ESD MIL-STD-883H Method 3015.8 8 kV
All CDM Charged Device Model ESD JEDEC-EIA/JESD22-C101E 2 kV
Thermal Resistance
Package Type θJA θJC Unit
14-Pin TSSOP 130 49 °C/W
10-Pin MSOP 120 45 °C/W
10-Pin MSOP-EP 70 10 °C/W
3
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
5V Electrical Characteristics
Specifications are at TA = 27°C. VDD = 5V, RL = 2.5kΩ, CPUMP=CPVSS=1F, CIN =10F, RIN = 10kΩ, RFB = 20kΩ, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VDD Supply Voltage Range 2.7 5.5 V
VOS Output Offset Voltage Input grounded, unity gain. -4 4 mV
IQ Quiescent Current No load 4.6 mA
IQ(off) Supply Current in Shutdown 0.2 mA
VO Output Voltage VDD=3.3V, f=1kHz, THD=1% 2.05 VRMS
VDD=5V, f=1kHz, THD=1% 3.05 VRMS
THD+N Total Harmonic Distortion Plus
Noise VO=3VRMS, f=1kHz 0.001 %
VENH High-level Threshold Voltage(EN) VDD=3.3V, EN Low to High Transition 1 V
VDD=5V, EN Low to High Transition 1 V
VENL Low-level Threshold voltage(EN) VDD=3.3V, EN High to Low Transition 0.5 V
VDD=5V, EN Low to High Transition 0.6 V
|IENH| High-level input current(EN) VDD = 5 V, VI = VDD 0.1 μA
|IENL| Low-level input current(EN) VDD = 5 V, VI = 0 V 1 μA
XTALK Crosstalk VO=3VRMS, f=1kHz -110 dB
ISC Short Circuit Current VDD=5V 20 mA
RIN Input Resistor Range 1 10 47 k
SR Slew Rate 5 V/μs
CL Maximum Capacitive Load 220 pF
CF Flying Capacitor 0.1 0.33 2.2 μF
VN Noise Output Voltage BW=20Hz to 20kHz 4.3 μVRMS
SNR Signal to Noise Ratio VO=3VRMS, f=1kHz, BW=20kHz 117 dB
GBW Unity Gain Bandwidth No load 10 MHz
AVOL Open-Loop Voltage Gain No load 130 dB
VUVP External Under-voltage Detection VDD=3.3V 1.18 1.23 1.28 V
VDD=5V 1.23 1.27 1.30 V
IHYS External Under-voltage Detection
Hysteresis Current 4.7 μA
fCP Charge Pump Frequency 330 kHz
4
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
Typical Performance Characteristics
Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Output Voltage
0.0001
0.001
0.01
0.1
1
10
0.1 1 10
Output Voltage (V
rms
)
THD+N (%)
V
DD
=3.3V
R
L
=100kΩ
f=1kHz
0.0001
0.001
0.01
0.1
1
10
0.1 1 10
Output Voltage (V
rms
)
THD+N (%)
V
DD
=5V
R
L
=100kΩ
f=1kHz
Total Harmonic Distortion + Noise vs. Output Voltage Total Harmonic Distortion + Noise vs. Output Voltage
0.0001
0.001
0.01
0.1
1
10
0.1 1 10
Output Voltage (V
rms
)
THD+N (%)
V
DD
=3.3V
R
L
=2.5kΩ
f=1kHz
0.0001
0.001
0.01
0.1
1
10
0.1 1 10
Output Voltage (V
rms
)
THD+N (%)
V
DD
=5V
R
L
=600Ω
f=1kHz
Total Harmonic Distortion + Noise vs. Frequency Total Harmonic Distortion + Noise vs. Frequency
0.0001
0.001
0.01
0.1
10 100 1k 10k 100k
Frequency (Hz)
THD+N (%)
V
DD
=3.3V
R
L
=2.5kΩ
Vo=2Vrms
0.0001
0.001
0.01
0.1
10 100 1k 10k 100k
Frequency (Hz)
THD+N (%)
V
DD
=5V
R
L
=100kΩ
Vo=2Vrms
5
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
Pin Functions
PIN
I/O Description
Name Number
+INR 1 I Positive input of the right channel OPAMP
-INR 2/1 I Negative input of the right channel OPAMP
OUTR 3/2 O Output of the right channel OPAMP
GND 4/EP/8 P Ground
EN 5/3 I Enable
PVSS 6/4 P Negative supply generated with integrated charge pump
CN 7/5 I/O Negative terminal of the flying capacitor of the charge
CP 8/6 I/O Positive terminal of the flying capacitor of the charge
PVDD 9/7 P Positive supply
PGND 10 P Ground for charge pump
UVP 11/8 I Under-voltage protection input
OUTL 12/9 O Output of the left channel OPAMP
-INL 13/10 I Negative input of the left channel OPAMP
+INR 14 I Positive input of the left channel OPAMP
Applications Information
Typical Application Circuit
VOUTR
CIN
-VINR
RIN RFB
Charge Pump
UVP
CIN
-VINL
RIN
VOUTL
CN CP
PVDDPVSS
PGNDEN
UVPGND
RFB
1µF
0.33µF
1µF
Figure 2 Typical Application Circuit of TPF632A
6
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
CIN
-VINR
RIN RFB
Charge Pump
UVP
CIN
-VINL
RIN
VOUTL
CN CP
PVDDPVSS
EN UVP
RFB
1μF 1μF
Figure 3 Typical Application Circuit of TPF605A（Left）and TPF607A（Right）
Typical application circuits are shown as above. TPF632A/605A/607A operates from a single supply voltage PVDD.
It integrated charge pump generates a negative supply –PVDD at the PVSS pin. The Line driving amplifiers work with
dual supplies: PVDD and –PVDD. Therefore, the DC level of the audio output can be designed to be 0V. A
DC-blocking capacitor typically seen in a single-supplied driver is not necessary.
The supply range of the TPF632A/605A/607A is 2.7V to 5.5V. For a 3VRMS output, the recommended supply voltage is
5V. For a 2VRMS output, the recommended supply voltage is 3.3V.
RIN of 2.5k and RFB of 5k set the inverting gain of 2. Because of the exceptional noise performance of
TPF632A/605A/607A, the dominant noise source is actually from RIN. To get better noise performance, lower input
resistance and feedback resistance may be used.
Integrated Charge Pump
The integrated charge pump in TPF632A/605A/607A generates negative power supply from a single supply PVDD. A
flying capacitor for the charge pump shall be applied between CP and CN. At the same time a decoupling capacitor
shall be applied between PVSS and ground. Typical value for the flying capacitor is 0.33uF. Typical value of the
decoupling capacitor shall be same as or larger than that of the flying capacitor. Low-ESR capacitors are
recommended for the flying capacitor and the decoupling capacitor.
Audio Signal Amplification Gain Setting
The main application of the TPF632A/605A/607A is to amplify/buffer audio signals and drive audio lines with very low
distortion. Typical application circuits with inverting gain are shown in Figure. 4.
Non-inverting amplification of audio signals is also possible with same low distortion.
RFB
RIN
CIN
-VIN
RFB
RIN
CIN
-VIN
RIN
CIN
+VIN
RFB
(a) (b)
Figure 4 Typical Application Circuit of TPF632A
7
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
AC-Coupling Input Capacitors
Because of the integrated charge pump that generates negative rail, TP632A/605A/607A may be used to amplify
audio signal so the output DC voltage is 0V. This usually requires the DC voltage of the input signal to be 0V. If the
input signal has a DC level other than 0V, an AC-coupling capacitor is necessary to block the DC voltage.
The AC-coupling capacitor essentially forms a high-pass filter at the input. The cut-off frequency of the filter has to be
low enough not to distort the input audio signal. For an inverting amplifier shown in Figure 4 the cut-off frequency may
be calculated as following:
(1)
If the required maximum cut-off frequency is known, the minimum AC-coupling capacitance can be determined:
(2)
Adding Low-Pass Filtering to the Gain
If low-pass filtering is necessary in addition to the audio signal amplification, a second-order filter can be implemented
as shown in Figure 5. Choice of C3, R1, R2, and R3 is based on the gain setting requirement and AC-coupling cut-off
frequency as discussed above. C1, C2 and C4 may be calculated depending on the bandwidth. Example choices of R
and C are listed in Table 1. If first-order filtering satisfies performance requirements, simply remove the C2 and C4 to
lower the component counts.
R3
C3
-VIN
(a) (b)
-VIN
+VIN
C1
C2
R1 R2
C4
R3
C1
R1 R2
R3
C1
R1 R2
C3
C3
Figure 5 Second-order filter with gain: (a) Single-ended input; (b) Differential input
Table 1 Example RC setting at different gains
Gain R1 R2 R3 C1 C2 C3 C4
G=2 576
549
1150
1nF 6.2nF 100uF 3.1nF
G=2.5 576
412
1430
1nF 6.8nF 100uF 3.4nF
G=3.75 383
301
1430
1nF 9.1nF 100uF 4.5nF
Pop-Free Power Up and Power Down
During power up or power down, the input device that provide audio source may experience significant DC level shift.
Charging of the input capacitor due to DC shift will cause pop noise. It is recommended that TPF632A/605A/607A is
disabled (EN low) during power up and power down and kept disabled until charging of the input capacitor is complete.
The sequence of EN control is illustrated below.
1
=
2
c
IN IN
f
R C
1
2
IN
IN c
C
R f
8
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
EN
Power
Figure 6 The Sequence of EN Control
Under-voltage Protection
When unexpected power off happens, the host may not have enough time to disable TPF632A/605A/607A before pop
noise is generated. The integrated under-voltage protection circuits can be used to mute and disable
TPF632A/605A/607A when the monitored supply voltage drops below certain voltage.
The recommended connection is shown below. VSUPPLY is the monitored supply voltage. The threshold voltage at the
UVP pin is 1.23V. R3 sets the hysteresis voltage and is usually much larger than R1 and R2. The turn on threshold and
hysteresis can be calculated:
VTH = 1.23V x (R1+R2)/R2 (3)
Hysteresis = 4.7uA x R3 x (R1+R2)/R2 (4)
when R3>>R1, R2 (5)
UVP
Vsupply
R1
R2
R3
Figure 7 Under-voltage Protection Circuits
ESD
TPF632A/605A/607A has reverse-biased ESD protection diodes on all inputs and outputs. Input and out pins can not
be biased more than 300mV beyond either supply rail.
Driving Large Capacitive Load
TPF632A/605A/607A is designed to drive large capacitive loads up to 220pF directly. When driving larger capacitive
loads with the TPF632A/605A/607A, a small series resistor at the output (RISO in Figure 8 ) improves the feedback
loop’s phase margin and stability by making the output load resistive at higher frequencies. Usually RISO of 50 is
sufficient.
9
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
Figure 8 Driving Circuits
Power Supply Layout and Bypass
The power supply pin of TPF632A/605A/607A should have a local bypass capacitor (i.e., 0.01μF to 0.1μF) within 2mm
for good high frequency performance. It can also use a bulk capacitor (i.e., 1μF or larger) within 100mm to provide
large, slow currents. This bulk capacitor can be shared with other analog parts.
Ground layout improves performance by decreasing the amount of stray capacitance and noise at the OPA’s inputs
and outputs. To decrease stray capacitance, minimize PC board lengths and resistor leads, and place external
components as close to the op amps’ pins as possible.
Proper Board Layout
To ensure optimum performance at the PCB level, care must be taken in the design of the board layout. To avoid
leakage currents, the surface of the board should be kept clean and free of moisture. Coating the surface creates a
barrier to moisture accumulation and helps reduce parasitic resistance on the board.
Keeping supply traces short and properly bypassing the power supplies minimizes power supply disturbances due to
output current variation, such as when driving an ac signal into a heavy load. Bypass capacitors should be connected
as closely as possible to the device supply pins. Stray capacitances are a concern at the outputs and the inputs of the
amplifier. It is recommended that signal traces be kept at least 5mm from supply lines to minimize coupling.
A variation in temperature across the PCB can cause a mismatch in the Seebeck voltages at solder joints and other
points where dissimilar metals are in contact, resulting in thermal voltage errors. To minimize these thermocouple
effects, orient resistors so heat sources warm both ends equally. Input signal paths should contain matching numbers
and types of components, where possible to match the number and type of thermocouple junctions. For example,
dummy components such as zero value resistors can be used to match real resistors in the opposite input path.
Matching components should be located in close proximity and should be oriented in the same manner. Ensure leads
are of equal length so that thermal conduction is in equilibrium. Keep heat sources on the PCB as far away from
amplifier input circuitry as is practical.
The use of a ground plane is highly recommended. A ground plane reduces EMI noise and also helps to maintain a
constant temperature across the circuit board.
10
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
Package Outline Dimensions
TSSOP-14
Symbol
Dimensions
In Millimeters
MIN TYP MAX
A - - 1.20
A1 0.05 - 0.15
A2 0.90 1.00 1.05
b 0.20 - 0.28
c 0.10 - 0.19
D 4.86 4.96 5.06
E 6.20 6.40 6.60
E1 4.30 4.40 4.50
e 0.65 BSC
L 0.45 0.60 0.75
L1 1.00 REF
L2 0.25 BSC
R 0.09 - -
θ 0° - 8°
E
e
E1
A1
A2
A
D
L1 L2
L
R
R1
θ
c
11
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
www.3peakic.com Rev. C
Package Outline Dimensions
MSOP-10-EP (EXPOSED PAD)
Symbol
Dimensions
In Millimeters
MIN
TYP
MAX
A 1.10
A0 4.70 - 5.10
A1 0.05 - 0.15
A2 0.75 0.85 0.95
b 0.19 - 0.28
c 0.08 0.15 0.23
D 2.90 3.00 3.10
D1 1.80REF
E1 2.90 3.30 3.10
E2 1.55REF
e 0.50BSC
L 0.40 - 0.70
L1 0.95BSC
θ 0° - 8°
aaa 0.2
bbb 0.25
ccc 0.10
ddd 0.08
12
TPF632
A
/
TPF605
A
/
TPF607
A
3
-
V
RMS
Audio Line Driver with Integrated Charge Pump
Rev. C www.3peakic.com
Package Outline Dimensions
MSOP-10 (NO EXPOSED PAD)
Symbol
Dimensions
In Millimeters
MIN
TYP
MAX
A - - 1.10
A0 4.70 5.10
A1 0.05 - 0.15
A2 0.75 0.85 0.95
b 0.19 - 0.28
c 0.08 0.15 0.23
D 2.90 3.00 3.10
D1 1.80REF
E1 2.90 3.30 3.10
E2 1.55REF
e 0.50BSC
L 0.40 - 0.70
L1 0.95BSC
θ 0° - 8°
aaa 0.2
bbb 0.25
ccc 0.10
ddd 0.08
