ZWS050911009KLX000 - VISHAY

○Product structure：Silicon monolithic integrated circuit○This product is not designed for protection against radioactive rays

.

1/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

TSZ22111・14・001

www.rohm.com

Datashee

t

DC Brushless FAN Motor Drivers

Three-phase Full-wave

Fan Motor Driver

BD6346FV

●General Description

BD6346FV is a three phase, sensorless motor 1chip driver

with integrated power DMOS MOSFETs. Its feature is

sensor-less drive which doesn’t require a hall device as a

location detection sensor. Furthermore, introducing a PWM

soft switched driving mechanism achieves silent

operations and low vibrations.

●Features

 Integrated Power DMOS FET driver

 Sensorless PWM soft switched drive

 Lock protection and automatic restart

 DC voltage/direct PWM input ,speed control

 Current limit

 Soft-Start function

 Quick-Start function

 Rotating speed pulse signal(FG)output

 UVLO

●Applications

 Refrigerator, Sever, Desktop, cooling Fan for general

consumer equipment

●Package(s) W (Typ.) x D (Typ.) x H (Max.)

SSOP-B20 6.50mm x 6.40mm x 1.45mm

●Absolute maximum ratings

Parameter Symbol Limit Unit

Supply voltage VCC 20 V

Power dissipation Pd 1200*1 mW

Operating temperature Topr -40 to +100 ℃

Storage temperature Tstg -55 to +150 ℃

Output voltage Vomax 20 V

Output Current Iomax 1.2*2 A

FG signal output voltage VFG 20 V

FG signal output current IFG 10 mA

REF current ability IREF 8 mA

Input voltage 1 (COM) Vin1 20 V

Input voltage2 (CONT, MIN, SS, OSC, TOSC, SEL) Vin2 6.5 V

Junction temperature Tjmax 150 °C

*1 Reduce by 9.6mW/°C, over Ta=25°C (on 70.0mm×70.0mm×1.6mm glass epoxy board)

*2 This value is not exceed Pd and ASO

●Recommended operating conditions

Parameter Symbol Limit Unit

supply voltage range Vcc 5.5 to 17.0 V

Input voltage (CONT) Vcont 0 to Vref V

Input voltage (MIN) Vmin Voscl to Vref V

Input frequency (CONT, OSC=GND setting) Fcont 20 to 50 kHz

SSOP-B20

Datasheet

2/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Pin Configuration(s) ●Pin description

P/No. T/Name Function

1 GND GND terminal (signal GND)

2 GND GND terminal (signal GND)

3 GND GND terminal (signal GND)

4 SS

Soft-Start capacitor connecting

terminal

5 REF Reference voltage terminal

6 CONT Output duty control terminal

7 MIN

Minimum rotating speed setting

terminal

8 SEL Output slope current select terminal

9 U Motor output U terminal

10 RNF

Output current detecting terminal

(Motor GND)

11 V Motor output V terminal

12 W Motor output W terminal

13 Vcc Power Supply terminal

14 COM Motor central tap terminal

15 TOSC

Oscillating capacitor connecting

terminal for synchronous driving

16 OSC

Oscillating capacitor connecting

terminal for output PWM operation

17 FG

Rotating speed pulse signal output

terminal

18 GND GND terminal (signal GND)

19 GND GND terminal (signal GND)

20 GND GND terminal (signal GND)

GND pin is shorted all GND pin (1-3, 18-20) on board

●Block diagram

GND

REF

TOSC

MIN COM

OSC

GND

FG

CONT

GND

SS

SEL

1

2

3

4

5

6

7

Vcc

GND

8

19

20

U W

RNF

18

V

17

9

10

15

16

14

13

12

11

Fig. 1 Pin configuration

(TOP VIEW)

V

c

SOFT START

& CURRENT

LIMIT

COM P

DET.

COM P

TOSC

OSC

W

Vcc

V

COM

FG

GND

SS

SEL

MIN

CONT

U

RNF

GND

REF

Vcl

V

c

V

c

PWM

COM P

CONTROL

LOGIC

SIGNAL

OUTPUT

LOCK

PROTECT

150° SOFT

SWITCH

QUICK

START

PRE DRIVER DETECT

LEVEL

UVLO

TOSC

TSD

BEMF

DETECT

REF OSC

1

2

3

4

5

6

7

15

16

8

14

12

11 10

9

13

20

19

18

17

REF

Fig. 2 Block diagram

Datasheet

3/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Electrical characteristics(Unless o t herwise specified Ta=25°C, Vcc=12V)

Parameter Symbol Limit Unit

Min.

Conditions

Typ.

Ref.

data

Min. Typ. Max.

Circuit current Icc 3.6 6 8.4 mA P.4

<REF>

REF voltage Vref 4.65 5.00 5.35 V Iref=–2mA P.4

<TOSC>

TOSC high voltage Vtosch 2.3 2.5 2.7 V P.4

TOSC low voltage Vtoscl 0.80 1.05 1.20 V P.4

TOSC Charge current Ictosc –80 –60 –40 µA P.5

TOSC Discharge current Idtosc 40 60 80 µA P.5

<CONT, MIN>

CONT input high voltage Vconth 2.8 - - V Vosc=0V -

CONT input low voltage Vcontl - - 1.0 V Vosc=0V -

CONT input bias current Icont - - –1 µA P.6

CONT input frequency Fcont 20 - 50 kHz -

MIN input bias current Imin - - –1 µA P.6

<OSC>

OSC High voltage Vosch 2.3 2.5 2.7 V P.6

OSC Low voltage Voscl 0.80 1.05 1.20 V P.6

OSC Charge current Icosc –40 –30 –20 µA P.6

OSC Discharge current Idosc 20 30 40 µA P.6

Current limit voltage Vcl 200 250 300 mV P.7

<Soft-Start>

SS charge current Icss 1.35 1.9 2.45 µA Vss=0V P.7

<FG>

FG output Low voltage Vfgl - 0.3 0.4 V Ifg=5mA P.5

FG output leak current Ifgl - - 10 µA Vfg=20V P.5

Lock detect ON time Ton 0.5 1 1.5 s TOSC_CAP=1000pF -

Lock detect OFF time Toff 2.5 5 7.5 s -

Output high voltage Vohh - 0.15 0.20 V Io=–200mA,for VCCvoltage P.7

Output low voltage Voll - 0.09 0.16 V Io=+200mA P.8

About a current item,define the inflow current to IC as a positive notation, and the outflow current from IC as a negative notation.

Datasheet

4/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Typical performance curves(Ref erence data)

0

2

4

6

8

10

0 5 10 15 20

Supplyvoltage:Vcc[V]

Circuitcurrent:Icc[mA]

2

3

4

5

6

0 5 10 15 20

Supplyvoltage:Vcc[V]

REFvoltage:VREF[V]

Fig. 3 Circuit current

Operating range

25°C

-40°C

100°C

Fig. 4 REF voltage

Operating range

100°C

25°C

-40°C

2.0

3.0

4.0

5.0

6.0

0246810

Outputsourcecurrent:IREF[mA]

REFvoltage:VREF[V]

0.5

1.0

1.5

2.0

2.5

3.0

0 5 10 15 20

Supplyvoltage:Vcc[V]

TOSCH/Lvoltage:VTOSCH/VTOSCL[V]

Fig. 5 REF voltage current ability (Vcc=12V)

25°C

-40°C

100°C

Fig. 6 TOSC High/Low voltage

25°C

-40°C

100°C

25°C

-40°C

100°C

Operating range

Datasheet

5/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Typical performance curves(Ref erence data)

-100

-50

0

50

100

0 5 10 15 20

Supplyvoltage:Vcc[V]

TOSCCharge/Dischargecurrent:

ICTOSC/IDTOSC[uA]

Fig. 7 TOSC charge/discharge current

-40°C

100°C

-40°C

100°C

25°C

0.0

0.2

0.4

0.6

0.8

0246810

FGsinkcurrent:IFG[mA]

FGlowvoltage:VFG[V]

Fig. 8 FG low voltage (Vcc=12V)

100°C 25°C

-40°C

0.0

0.2

0.4

0.6

0.8

0246810

FGsinkcurrent:IFG[mA]

FGlowvoltage:VFG [V]

Fig. 9 FG low voltage (Ta=25℃)

17V

12V

5.5V

0.0

2.0

4.0

6.0

8.0

10.0

0 5 10 15 20

Supplyvoltage:Vcc[V]

FGleakcurrent:IFG [uA]

Fig. 10 FG leak current

Operating range

100°C

25°C

-40°C

Operating range

25°C

Datasheet

6/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Typical performance curves(Ref erence data)

0.5

1.0

1.5

2.0

2.5

3.0

0 5 10 15 20

SupplyVoltage:Vcc[V]

OSChigh/lowvoltage:Vosch/Voscl[V]

-0.8

-0.6

-0.4

-0.2

0.0

0.2

0 5 10 15 20

SupplyVoltage:Vcc[V]

CONTinputbiascurrent:Icont[uA]

-0.8

-0.6

-0.4

-0.2

0.0

0.2

0 5 10 15 20

Supply Voltage : Vcc[V]

MIN input bias current : Imin[uA]

100°C

25°C

-40°C

100°C

25°C

-40°C

100°C

25°C

-40°C

25°C

100°C

-60

-40

-20

0

20

40

60

0 5 10 15 20

Supplyvoltage:Vcc[V]

OSCCharge/Dischargecurrent:

ICOSC/IdoscOSC[uA]

100°C

25°C

-40°C

25°C

100°C

Fig. 11 CONT input bias current Fig. 12 CONT input bias current

Fig. 13 OSC high/low voltage Fig. 14 OSC charge/dischar ge current

Datasheet

7/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Typical performance curves(Ref erence data)

0.00

0.05

0.10

0.15

0.20

0 50 100 150 200

Outputsourcecurrent:IO[mA]

OutputHivoltage:VOH [V]

Fig. 17 Output Hi voltage (Vcc=12V)

100°C

25°C

-40°C

Fig. 18 Output Hi voltage (Ta=25℃)

0.00

0.05

0.10

0.15

0.20

0 50 100 150 200

Outputsourcecurrent:IO[mA]

OutputHivoltage:VOH [V]

5.5V

12V

17V

0

1

2

3

4

0 5 10 15 20

Supplyvoltage:Vcc[V]

SSchargecurrent:Isscha[uA]

100

150

200

250

300

350

400

0 5 10 15 20

Supplyvoltage:Vcc[V]

Currentlimitvoltage:Vcl[mV]

Fig. 15 SS charge current Fig. 16 Current limit voltage

Datasheet

8/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Typical performance curve (Reference data)

0.00

0.05

0.10

0.15

0.20

0 50 100 150 200

Outputsinkcurrent:IO[mA]

OutputLovoltage:VOL[V]

0.00

0.05

0.10

0.15

0.20

0 50 100 150 200

Outputsinkcurrent:IO[mA]

OutputLovoltage:VOL[V]

100°C

25°C

-40°C

Fig.19 Output Lo voltage (Vcc=12V) Fig. 20 Output Lo voltage (Ta=25℃)

12V

5.5V

17V

Datasheet

9/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Application circuit example (Constant values are for reference)

1) Vcc control motor variable speed for application

ex. Vcc input voltage control motor constant speed , not necessary to set minimum rotation speed.

Control input terminal setting of Vcc control motor variable speed for ap plication

In case of Vcc control with OSC terminal is shorted GND, control input terminal (CONT, MIN) is showed in Fig.

22,23.

Pay attention to design board

a) IC Vcc, Motor Output, Motor GND line is as wide as possible

b) IC GND line is common to other application GND without motor GND. Wire from near the (-) land.

c) bypass-capacitor, Diode must be routed Vcc terminal as near as possible.

Fig. 21 Vcc control application

()

()

MIN terminal is connected REF

terminal, invalidate minimum

output duty setting.

Absolute Output Voltage 20V

Absolute Output Current 1.2A

FG open collector protection

Connect a pull-up external

resistor

Detect current to limit motor

current, pay attention to

wattage. Because large current

is present.

Stable REF for provision

Provision for Vcc-rise by kick-back

the bypass capacitor, diode must be

routed Vcc terminal as near as

possible.

Against reverse FAN

connector for provision

Vcc control,

OSC terminal is shorted

GND.

Soft-Start time setting

Sync-Startup time setting

Its necessary to choose the

best capacitor value for

optimum start-up operation

Select slope current setting

Open input setting

4.7µF to

0.47µF

to 4.7µF

0.1µF to

V

c

DET.

COMP

TOSC

OSC

W

Vcc

V

COM

FG

GND

SS

SEL

MIN

CONT

U

RNF

GND

REF

Vcl

V

c

Vc

c

PWM

COMP

SIGNAL

OUTPUT

LOCK

PROTECT

150° SOFT

SWITCH

QUICK

START

PRE DRIVER DETECT

LEVEL

UVLO

TOSC

TSD

BEMF

DETECT

REF OSC

＋

−

SIG

1

2

3

4

5

6

7

15

16

8

14

12

11 10

9

13

20

19

18

17

680pF to

2200pF

0.22Ω to

REF

0Ω to

to 10kΩ

SOFT START

& CURRENT

LIMIT

COMP

CONTROL

LOGIC

Setting Pull-down

(Prohibition: torque is OFF)

REF

CONT

NG

CONT

REF

Setti n g CO N T input, u nd er Hi gh

Voltage.(prohibition:Input is

irregular)

NG

REF

OK

Setting Pull-up

( torq ue i s ON )

CONT

Fig. 22 Vcc control (OSC terminal is shorted GND), CONT terminal setting

REF

OK

Setting OPEN (internal

resistance Pull-up,torque is ON)

CONT

REF

OK

Setting Pull-up

( torq ue i s OFF )

MIN

Setting Pull-down

(proh ibition: test-mode inpu t)

REF

MIN

NG

Fig. 23 Vcc control application (OSC terminal is shorted GND), MIN terminal setting

REF

NG

Setting OPEN

(Prohibition:Input is irregular)

MIN

REF

Setti ng unde r REF vol tag e

(proh ibi tion: input unrel ated

control)

NG

Datasheet

10/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Application circuit example(Constant values are for reference)

2) PWM control motor variable speed for application by PWM duty con vert input DC voltage

ex. external PWM signal convert DC voltage, control rotation speed for application. Possible to set minimum rotation

speed.

Control input terminal setting of PWM control motor variable speed for app lication

In case of PWM control with OSC terminal is shorted GND, control input terminal (CONT, MIN) is showed in Fig.

25,26.But CONT,MIN terminal setting Pull-up are state of Motor stop.

MIN

REF

Setti n g under OSC Hi g h voltage

( torque is ON )

OK

REF

NG

Setting OPEN

(prohib ition:input is irregular)

CONT

REF

OK

Setting Pull-up

( torq ue i s OFF )

CONT

Setting Pull-dowm

( torq ue i s ON )

OK REF

CONT

REF

Input variable DC under RE F

voltage ( torque is ON/OFF )

OK

LPF

PWM

Fig. 24 PWM duty convert DC voltage application

Fig. 25 PWM control by input DC voltage(OSC terminal is CAP to GND), CONT terminal

REF

OK

Setting Pull-up

( torq ue i s OFF)

MIN

Setting Pull-down

(proh ibiti o n:te st-mode in put)

REF

MIN

NG

Fig. 26 PWM control by input DC voltage (OSC terminal is CAP to GND), MIN terminal setting

REF

NG

Setting OPEN

(prohib ition:input is irregular)

MIN

()

()

Soft-Start time setting

Absolute Output Voltage 20V

Absolute Output Current 1.2A

FG open collector protection

Connect a pull-up external

resistor

Detect current to limit motor

current, pay attention to

wattage. Because large current

is present.

Stable REF for provision

Provision for Vcc-rise by kick-back

the bypass capacitor, diode must be

routed Vcc terminal as near as

possible.

Against reverse FAN

connector for provision

Minimum input duty setting

Output PWM frequency setting

Select slope current setting

Sync-Startup time setting

Its necessary to choose the

best capacitor value for

optimum start-up operation

PWMduty convert DC voltage

circuit

4.7µF to

0.47µF

to 4.7µF

0.1µF to

V

c

DET.

COMP

TOSC

OSC

W

Vcc

V

COM

FG

GND

SS

SEL

MIN

CONT

U

RNF

GND

REF

Vcl

Vcc Vcc

PWM

COMP

SIGNAL

OUTPUT

LOCK

PROTECT

150° SOFT

SWITCH

QUICK

START

PRE DRIVER DETECT

LEVEL

UVLO

TOSC

TSD

BEMF

DETECT

REF OSC

＋

−

SIG

1

2

3

4

5

6

7

15

16

8

14

12

11 10

9

13

20

19

18

17

680pF to

2200pF

100pF to

1000pF

0.22Ω to

REF

0Ω to

PWM

to 10kΩ

SOFT START

& CURRENT

LIMIT

COMP

CONTROL

LOGIC

Datasheet

11/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Application circuit example(Constant values are for referenc e)

3) PWM control motor variable speed for application by input pulse signal (direct PWM input)

ex. external PWM signal duty control directly rotation speed for application. Its not necessary to set minimum

rotation speed.

Control input terminal setting of PWM control motor variable speed by pulse input for application

In case of PWM control with OSC terminal is shorted GND, control input terminal (CONT, MIN) is showed in Fig.

28,29. But CONT terminal setting Pull-up or OPEN, Motor is state of constant rotation speed.

REF

OK

Setting Pull-up

( torq ue i s ON )

CONT

Setting Pull-down

(pro h ibi tion: torque is OFF)

REF

CONT

NG

CONT

REF

Pulse input within CONT

input voltage range

OK

PWM

Fig. 27 Direct PWM application

Fig. 28 PWM control by input pulse signal (OSC terminal is shorted GND), CONT terminal setting

REF

OK

Setting OPEN(torque is

ON,internal resistance Pull-up)

CONT

REF

OK

Setting Pull-up

( torq ue i s ON )

MIN

Setting Pull-down

(proh ibition: test-mode inpu t

REF

MIN

NG

Fig. 29 PWM control by input pulse signal (OSC terminal is shorted GND), MIN terminal setting

REF

NG

Setting OPEN

(prohib ition:input is irregular)

MIN

REF

Setti ng unde r REF vol tag e

(proh i bitio n: i n p ut un rela te d

control) NG

()

()

Soft-Start time setting

Stable REF for provision

Input Direct PWM

MIN terminal is connected REF

terminal, invalidate minimum

output duty setting.

Absolute Output Voltage 20V

Absolute Output Current 1.2A

FG open collector protection

Connect a pull-up external

resistor

Detect current to limit motor

current, pay attention to

wattage. Because large current

is present.

Provision for Vcc-rise by kick-back

the bypass capacitor, diode must be

routed Vcc terminal as near as

possible

Against reverse FAN

connector for provision

Input Direct PWM,

OSC terminal is shorted

Sync-Startup time setting

Its necessary to choose the

best capacitor value for

optimum start-up operation

Select slope current setting

PWM

0.47µF

to 4.7µF

0.1µF to

Vcc

DET.

COMP

TOSC

OSC

W

Vcc

V

COM

FG

GND

SS

SEL

MIN

CONT

U

RNF

GND

REF

Vcl

V

c

cVcc

PWM

COMP

SIGNAL

OUTPUT

LOCK

PROTECT

150° SOFT

SWITCH

QUICK

ST ART

PRE DRIVER DETECT

LEVEL

UVLO

TOSC

TSD

BEMF

DETECT

REF OSC

＋

−

SIG

1

2

3

4

5

6

7

15

16

8

14

12

11 10

9

13

20

19

18

17

4.7µF to

680pF to

2200pF

0.22Ω to

REF

0Ω to

to 10kΩ

SOFT START

& CURRENT

LIMIT

COMP

CONTROL

LOGIC

Datasheet

12/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Description of operations

1) Sensorless Drive

BD6346FV is a motor driver IC for driving a three-phase brushless DC motor without a hall sensor.

Synchronized start-up and BEMF detection driving

Synchronized start-up way, when BEMF signal isn’t detected for constant time at start-up, synchronized start-up

mechanism outputs output logic forcibly by using standard synchronized signal (sync signal) and makes motor

forward drive. This assistance of motor start-up as constant cycle is synchronized driving mechanism. Synchronized

frequency is standard synchronized signal. Driving mechanism changes to BEMF detection driving after detect

BEMF signal. Fig. 30, the timing chart (outline) is shown.

FG signal fixed High (masking) during 1.1s (typ.) after Vcc on.

Synchronized time (TOSC)

The TOSC terminal starts a self-oscillation by connecting a capacitor between the TOSC terminal and GND terminal. It

becomes a start-up frequency, and synchronized time can be adjusted by changing external capacitor. When the

capacitor value is small, synchronized time becomes short. It is necessary to choose the best capacitor value for

optimum start-up operation. For example external capacitor is 1000pF, synchronized time is 96ms (typ.).1000pF is

recommended for setting value . Relationship between external capacitor and synchronized time is shown in below.

TOSC Capacitor‐Synchronized time Table (ref. Val)

TOSC Capacitor

(Ctosc) [pF]

Synchronized time

(Tosc) [ms]

680 65

1000 96

2200 211

Ttosc[s] = {Ctosc[F] x (|Idtosc[A]| + |Ictosc[A]|) x (Vtosch[V] – Vtoscl[V])} / (|Idtosc[A] x Ictosc[A]|)

Tosc [s] = 2000 x Ttosc[s]

(ex.) When Ctosc = 1000[pF], TOSC period is nearly 48us, Synchronized time is nearly 96ms.

Ttosc[s] = {1000[pF] x (|60[µA]| + |–60[µA]|) x (2.5[V] – 1.05[V])} / {|60[µA] x (–60[µA])|}

= 48 x 10-6[s]

Tosc[s] = 2000 x 48[µs]

= 96 x 10-3[s]

Fig. 30 Synchronized start-up and BEMF detection driving timing chart

Fig. 31 TOSC Capacitor and IC internal circuit

SyncSig.TOSC Sig.

Ictosc

Idtosc

TOSC

OSCILLATOR X2000

DIVIDER

Synchronized period

BEMF detect start

Synchronized start-up section BEMF detection drive section

start

.

W phase

voltage

FG

Voltage

VCC

Voltage

Sync.

signal

(IC

internal

signal)

FG output fixed High, during 1.1sec (typ.)

V phase

voltage

U phase

voltage

SS

Voltage

Soft start section

(current limit operation)

Datasheet

13/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

Setting of Appropriate capacitor value

Appropriate value of synchronized time is differ with characteristic and parameter of motor. Appropriate value

decided by start-up confirmation with various capacitor value. Recommend to TOSC_CAP with 1000pF,next confirm

to start up with 1200,1500,1700,2000,2200pF･･･,and 870,670,470,330pF･･･,etc. Appropriate capacitor value is

decided after confirm maximum start-up NG value and minimum start-up NG value. For example, small BEMF

voltage motor tends to small capacitor value. Set capacitor value after confirm sufficiently. Setting TOSC_CAP value

range is from 680pF to 2200pF.

1) Sensorless-drive (continuance)

PWM soft-switched driving

PWM soft-switched driving, When each phase changed, change smoothly each phase current. For purpose, silent

and low vibration motor driving.

In Fig. 32, the timing charts of the output signals from U,V,W phase as well as the FG terminal is shown with PWM

soft-switched driving section. Assuming that a three-slot tetrode motor is used, two pulse outputs of FG are

produced for one motor cycle. The three phases are excited in the order of U,V, and W phases.

STAGE Motor Output

Motor U output Motor V output Motor W output

① H L Hi-Z

② H Hi-Z L

③ Hi-Z H L

④ L H Hi-Z

⑤ L Hi-Z H

⑥ Hi-Z L H

note) Output pattern proceed in numeric 1→2→3 〜 6→1.

H; High, L; Low, Hi-Z; High impedance

Fig. 32 BEMF detection driving (full-torque) and PWM soft-switched driving timing

U相電圧

Position

[deg]

0 60 120 180 240 300 360

①②③④⑤⑥①②③④⑤⑥

V相電圧

W相電圧

FG電圧

U

WV

STAGE

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

PWMソフトスイッチング動作

60 120 180 240 300 360

U phase vol.

V phase vol.

W phase vol.

FG vol.

PWM soft-switched driving operation

Datasheet

14/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Description of operations

2) Lock Protection Feature, Automatic Recovery Circuit

To prevent passing a coil current on any phase when a motor is locked, it is provided with a function, which

can turn OFF the output for a certain period of time and then automatically restore itself to the normal

operation. During the motor rotation, an appropriate logic based on the induced electromotive voltage can be

continuously given to each phase; on the other hand, when the motor is locked, no induced electromotive

voltage is obtained. Utilizing this phenomenon to take a protective against locking, when the induced

electromotive voltage is not detected for a predetermined period of time (TON typ. 1.0s), it is judged that the

motor is locked and the output is turned OFF for a predetermined period of time (TOFF typ. 5.0s). In Fig. 33,

the timing chart is shown.

3)UVLO（Under voltage lock out circuit）

In the operation area under the guaranteed operating power supply voltage of 5.5V (typ.), the transistor

on the output can be turned OFF at a power supply voltage of 3.9V (typ.). A hysteresis width of 250mV is provided

and a normal operation can be performed at 4.15V(typ.). This function is installed to prevent unpredictable operations,

such as a large amount of current passing through the output, by means of intentionally turning OFF the output

during an operation at a very low power supply voltage which may cause an abnormal function in the internal circuit.

About turning off a output voltage at UVLO, It becomes a OFF mode.

(Upper MOS FET and Under MOS FET are turned OFF.)

Fig. 33 Lock protection (Internal counter way) timing chart

Recover to the

normal operation

Induced

Electromotive

Voltage

detection

Output

FG

ON OFF ON

Detectin Not

Detection

Motor lock Motor unlock

TO TOFF

Detectin

Datasheet

15/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Description of operations

4)PWM speed control

Rotation speed change by Motor output (U,V,W ) PWM duty., PWM operation are in below two ways.

a) OSC terminal connect CAP to GND, DC voltage input to CONT terminal, MIN terminal.

b) OSC terminal is shorted GND, Pulse signal input to CONT terminal.

a) PWM control, OSC terminal connect CAP to GND, DC voltage input to CONT terminal, MIN terminal.

As shown in Fig. 36, to change the output ON time, a DC input voltage from TH terminal is compared to the

triangle wave produced by the OSC circuit. MIN terminal is use to set the minimum rotational speed. ON time

is determined by either CONT terminal voltage or MIN terminal voltage, whichever is lower.

OSC voltage > CONT voltage (MIN voltage): PWM output phase ON

OSC voltage < CONT voltage (MIN voltage): PWM output phase OFF

Resistor divider of the internal regulator (REF) terminal equal to typ. 5.0V) generates OSC high and low voltage

level of typically 2.5V and 1.05V respectively, and the ratio of those voltages is designed not to fluctuate easily.

When the input voltage at TH terminal is constant, the effect of OSC H/L voltage fluctuation is large. However, an

application can be made which is not easily affected by the fluctuation of the triangular wave by generating CONT

voltage from REF. For application that requires high precision, determine the value with sufficient margin after

taking full consideration of external components. It should be detected constant value with margin for application of

more severe precision.

Output frequency setting

The PWM Frequency (Fosc) in which the motor is operated is set according to the capacitor value (Cosc)

connected to OSC terminal.

U相電圧

Position

[deg]

①②③④⑤⑥①②③④⑤⑥

V相電圧

W相電圧

U

WV

STAGE

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

U

WV

PWMソフトスイッチング動作 PWM可変速制御

0 60 120 180 240 300 360 60 120 180 240 300 360

MIN

REF

OSC

REF

CONT

PWM

COMP

PWM

COMP

OSC

REF

PWM

LPF Disable

Direct PWM

REF

U_vol.

CONT

5.0V

1.05V

2.5V

Low

High

0.0V

GND

Zero

Full

Motor

torque

MIN

Min.

OSC

W_vol.

Low

High

V_vol.

Low

High

Middle

Motor out ON

Fig. 36 DC input PWM control timing chart (ex. (U, V, W) = (L, M, H))

Fig. 35 DC input application

Fosc[Hz] = (|Idosc[A] x Icosc[A]|) / {Cosc[F] x (|Idosc[A]| + |Icosc[A]|) x (Vosch[V] – Voscl[V])}

(ex.) When Cosc is 330pF, the PWM output frequency is 31kHz.

Fosc[Hz] = {|30[µA] x (–30[µA])|} / {330[pF] x (|30[µA]| + |–30[µA]|) x (2.5[V] – 1.05[V])}

= 31 x 103[Hz]

Fig. 34 BEMF detection driving (PWM control) and PWM soft-switching timing chart

U phase vol.

V phase vol.

W phase vol.

PWM soft-switched driving PWM speed control

Motor out

Datasheet

16/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Description of operations

4) PWM speed control (continuance)

b) PWM control: OSC terminal is shorted GND, Pulse signal input to CONT terminal.

In Fig. 38, PWM control, pulse signal input to CONT terminal. Motor output PWM duty change by input pulse

signal duty. MIN terminal should be pulled up REF terminal.

5)Current limit

A current passing through the motor coil can be detected on the output current detection resistance to prohibit a

current flow larger than a current limit value (motor output off).The current limit value is determined by setting of the IC

internal limit(Vcl) :250mV (typ.),and the output current detection resistance value using the following in below equation.

When no-use current limit function, RNF terminal is shorted

GND.

In Fig. 40, IC small signal GND line should be separated Motor large current GND line connected R1.Same as soft

start Capacitor.(P.4 Pay attention to design board(b)) item reference)

6)Soft start

To prevent lush current, slowly up to rotation speed, when

motor start in VCC on, quick start, restart lock detect on etc.

Soft start time set by SS terminal connected CAP to charge

current. No use soft start, SS terminal set open. 1uF is

recommended for setting value at first, or 0.47uF-4.7uF.

SS

Vcl

RNF

W

V

U

IC small signal

GND line

Io

Motor large current

GND line

C1

R1

−

Vc

c

SOFT START &

CURRENT LIMIT

COMP

Icss

GND

SS

OK

Open setting

(Softstart Disable)

Connect capacitor

(Softstart Enable)

OK

SS

Io[A] = Vcl[V] / R1[Ω]

= 250[mV] / 0.33[Ω]

=0.758[A]

Fig. 40 small signal and large current GND line separate

PR[W] = Vcl[V] x Io[A]

= 250[mV] x 0.758[A]

= 0.19[W]

Fig. 41 Soft start function, SS terminal setting

Connect detect current

resistance(current limit Enable)

OK

RNF

GND sho r t setting

(current limit Disable)

OK

RNF

NG

Open settin g (prohi bit,m ot or

GND terminal)

Fig. 37 Input pulse application

MIN

REF

OSC

REF

CONT

PWM

COMP

PWM

COMP

OSC

PWM

REF Disable

Direct PWM

OSC

U_vol.

CONT

5.0V

1.05V

2.5V

Low

High

0.0V

GND

Zero

Full

Motor

torque

W_vol.

Low

High

V_vol.

Low

High

Middle

Motor output ON

MINREF

Fig. 38 Input pulse PWM control timing chart (ex. (U, V, W) = (L, M, H))

Fig. 39 Current limit function, RNF terminal setting

Datasheet

17/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Description of operations

6) Soft start (continuance)

In Fig. 40, SS terminal charge current (Icss) is 1.9uA (typ.), Set SS terminal connect Capacitor (C1) and cut motor

output current (Icut), lead to that current time(Tss) in below equation. Icss1 is reduced 1/10 SS terminal charge current

(Icss) in internal IC.

7) Quick start

When torque off logic is inputted

by the control signal over fixed

time (80us), the lock protection

function becomes off.

And the motor could restart

quickly at the timing of control

signal in input.

8) Select of drive current slope

By changing two steps PWM soft-switching section in SEL

terminal, can adjust each phase slope at motor driving. SEL

terminal pull down resistance internal IC.SEL terminal is to

pull-up REF terminal, SEL input signal is high.

When SEL terminal pull up REF terminal, PWM soft-switching

section is more wide to smoothly current slope than SEL

terminal OPEN, BEMF detection section is more narrow.

Please select to fit application.

Tss[s] = (C1[F] x Icut[A] x R1[Ω]) / Icss1[A]

(ex.) Assuming that C1 = 1.0[µF], Icut = 0.8[A], R1 = 0.1[Ω] then, soft-start time is 421ms

Tss[s] = (1.0[µF] x 0.8[A] x 0.1[Ω]) / (1.9/10)[uA]

= 421x 10-3[s]

Fig. 42 Characteristic of motor output current

at soft-start setting

Fig. 43 Characteristic of motor output current

at no soft-start setting

Vcc

Softstart capacitor di s c harg e ti me t yp. 1 .0m s

OFF

ON

0A

VCC on

Motor

Output

current

Icut

Io

Tss

Current

limit

l

VCC on

Tss

Softstart capacitor discharge time typ. 1.0ms

Quick start stand-by

Tss

Disable

Enable

torque

order OFF

ON

0%

typ. 80µs

Lock protection

Internal signal

CONT or

MIN

torque

Moto

r

Output ON

dut

y

Fig. 44 torque order and quick start, timing chart

Fig. 45 Slope of drive current, SEL setting

REF

OK

Open setting (IC in ternal

resistance pu ll- d ow n, l ow in p ut)

SEL

REF

Pull-up setting

(High input)

OK

Fig. 46 SEL open, drive waveform Fig. 47 SEL pull-up, drive waveform

0 60 120 180 240 300 360

U phase v ol.

Position

[deg] 0 60 120 180 240 300 360

Sof t-switching PWM operation

V phase v ol.

W phase v ol.

U phase v ol.

Position

[deg] 0 60 120 180 240 300 360

Sof t-switching PWM operation

V phase v ol.

W phase v ol.

Datasheet

18/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Safety measure

1) Reverse connection protection diode

Reverse connection of power results in IC destruction as shown in Fig. 48. When reverse connection is possible,

reverse connection protection diode must be added between power supply and VCC.

2) Measure against VCC voltage rise by back electromotive force

Back electromotive force (Back EMF) generates regenerative current to power supply. However, when reverse

connection protection diode is connected, VCC voltage rises because the diode prevents current flow to power supply.

When you use reverse connection protection diode, Please connect Zenner diode, or capacitor.

Do not exceed absolute maximum ratings Vcc=20V.

3) Problem of GND line PWM switching

Do not perform PWM switching of GND line because GND terminal potential cannot be kept to a minimum.

4) FG output

FG output is an open drain and requires pull-up resistor. Adding resistor R1 can protect the IC. An excess of absolute

maximum rating, when FG output terminal is directly connected to power supply, could damage the IC.

Internal circuit impedance is high

⇒Amperage small

V

CC

Circuit

block

GND

I/O PIN

In normal energization

Large current flows

⇒Thermal destruction

I/O PIN

V

CC

GND

Circuit

block

Reverse power connection

No destruction

I/O PIN

V

CC

GND

Circuit

block

After reverse connection

destruction

p

revention

Fig. 48 Flow of current when power is connected reversely

ON

Phase

switching

ON

Fig. 49 Vcc voltage rise by back electromotive force

ON

(A)C a pacitor (B) Zen ner dio de (C) Capacitor & Zen ner dio de

Fig. 50 Measure against Vcc voltage rise

Fig. 51 GND line PWM switching prohibited Fig. 52 Protection of FG terminal

FG

Protection

resistor

MotorUnit

driver

Pull-up

resistor

connector

SIG

Vcc

GND

prohibit

Motor

driver

M

Controler

ＰＷＭ input

Vcc

GND

prohibit

Motor

driver

M

Controler

ＰＷＭ input

Datasheet

19/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Power dissipation

Power dissipation (total loss) indicates the power that can be consumed by IC at Ta=25°C (normal temperature). IC is

heated when it consumes power, and the temperature of IC chip becomes higher than ambient temperature. The

temperature that can be accepted by IC chip depends on circuit configuration, manufacturing process, etc, and consumable

power is limited. Power dissipation is determined by the temperature allowed in IC chip (maximum junction temperature)

and thermal resistance of package (heat dissipation capability). The maximum junction temperature is in general equal to

the maximum value in the storage temperature range.

Heat generated by consumed power of IC is radiated from the mold resin or lead frame of package. The parameter which

indicates this heat dissipation capability (hardness of heat release) is called heat resistance, represented by the symbol

θja[°C/W]. This heat resistance can estimate the temperature of IC inside the package. Fig. 53 shows the model of heat

resistance of the package. Heat resistance θja, ambient temperature Ta, junction temperature Tj, and power consumption P

can be calculated by the equation below:

Thermal derating curve indicates power that can be consumed by IC with reference to ambient temperature. Power that can

be consumed by IC begins to attenuate at certain ambient temperature. This gradient is determined by thermal resistance

θja. Thermal resistanceθja depends on chip size, power consumption, package ambient temperature, packaging condition,

wind velocity, etc., even when the same package is used. Thermal derating curve indicates a reference value measured at

a specified condition. Fig. 54 shows a thermal derating curve (Value when mounting FR4 glass epoxy board

70[mm]×70[mm] ×1.6[mm] (copper foil area below 3[%]))

●Equivalent circuit ( resi stor is reference valu e )

1) Vcc,GND terminal 2) CONT terminal 3) MIN terminal 4) SEL terminal

5) REF terminal 6) OSC,TOSC terminal 7) SS terminal 8) U,V,W,RNF terminal

9) COM terminal 10) FG terminal

CONT

10

k

Ω

200kΩ

REFREF

1kΩ

θja = (Tj – Ta) / P [°C/W]

θjc = (Tj – Tc) / P [°C/W]

θja = (Tj – Ta) / P [°C/W]

600

900

Pd[mW]

0 25 50 75 100 125 150Ta [° C]

300

1200

θja=104.2 [°C/W]

10Ω

FG

Vcc

GND

40kΩ

Vcc

REF

SS

30Ω

40kΩ

Vcc

1kΩ

MIN

12kΩ

SEL

10kΩ

200kΩ

REF

OSC, TOSC

Vcc

1kΩ 1kΩ

Vcc

2kΩ

COM

V

RNF

Vcc

W

U

62kΩ

Fig. 54 Thermal derating curve

*Reduce by 9.6mW/℃ over 25℃

（On 70.0mmX70.0mmX1.6mm glass epoxy board）

Fig. 53 Thermal resistance

Datasheet

20/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Operational Notes

1) Absolute maximum ratings

An excess in the absolute maximum rations, such as supply voltage, temperature range of operating conditions, etc.,

can break down the devices, thus making impossible to identify breaking mode, such as a short circuit or an open

circuit. If any over rated values will expect to exceed the absolute maximum ratings, consider adding circuit protection

devices, such as fuses.

2) Connecting the power supply connector backward

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

supply lines. An external direction diode can be added.

3) Power supply line

Back electromotive force causes regenerated current to power supply line, therefore take a measure such as placing a

capacitor between power supply and GND for routing regenerated current. And fully ensure that the capacitor

characteristics have no problem before determine a capacitor value. (When applying electrolytic capacitors,

capacitance characteristic values are reduced at low temperatures)

4) GND potential

It is possible that the motor output terminal may deflect below GND terminal because of influence by back

electromotive force of motor. The potential GND terminal must be minimum potential in all operating conditions,

except that the levels of the motor outputs terminals are under GND level by the back electromotive force of the motor

coil. Also ensure that all terminals except GND and motor output terminals do not fall below GND voltage including

transient characteristics. Malfunction may possibly occur depending on use condition, environment, and property of

individual motor. Please make fully confirmation that no problem is found on operation of IC.

5) Thermal design

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

conditions.

6) Inter-pin shorts and mounting errors

Use caution when positioning the IC for mounting on printed circuit boards. The IC may be damaged if there is any

connection error or if pins are shorted together.

7) Actions in strong electromagnetic field

Use caution when using the IC in the presence of a strong electromagnetic field as doing so may cause the IC to

malfunction.

8) ASO

When using the IC, set the output transistor so that it does not exceed absolute maximum rations or ASO.

9) Thermal shut down circuit

The IC incorporates a built-in thermal shutdown circuit (TSD circuit). Operation temperature is 175°C (typ.) and has a

hysteresis width of 25°C (typ.). When IC chip temperature rises and TSD circuit works, the output terminal becomes

an open state. TSD circuit is designed only to shut the IC off to prevent thermal runaway. It is not designed to protect

the IC or guarantee its operation. Do not continue to use the IC after operation this circuit or use the IC in an

environment where the operation of this circuit is assumed.

10) Testing on application boards

When testing the IC on an application board, connecting a capacitor to a pin with low impedance subjects the IC to

stress. Always discharge capacitors after each process or step. Always turn the IC’s power supply off before

connecting it to or removing it from a jig or fixture during the inspection process. Ground the IC during assembly steps

as an antistatic measure. Use similar precaution when transporting or storing the IC.

11) GND wiring pattern

When using both small signal and large current GND patterns, it is recommended to isolate the two ground patterns,

placing a single ground point at the ground potential of application so that the pattern wiring resistance and voltage

variations caused by large currents do not cause variations in the small signal ground voltage. Be careful not to

change the GND wiring pattern of any external components, either.

12) Capacitor between output and GND

When a large capacitor is connected between output and GND, if Vcc is shorted with 0V or GND for some cause, it is

possible that the current charged in the capacitor may flow into the output resulting in destruction. Keep the capacitor

between output and GND below 100uF.

13) IC terminal input

When Vcc voltage is not applied to IC, do not apply voltage to each input terminal. When voltage above Vcc or below

GND is applied to the input terminal, parasitic element is actuated due to the structure of IC. Operation of parasitic

element causes mutual interference between circuits, resulting in malfunction as well as destruction in the last. Do not

use in a manner where parasitic element is actuated.

14) In use

We are sure that the example of application circuit is preferable, but please check the character further more in

application to a part that requires high precision. In using the unit with external circuit constant changed, consider the

variation of externally equipped parts and our IC including not only static character but also transient character and

allow sufficient margin in determining.

●status of this document

The English version of this document is formal specification. A customer may use this translation version only for a

reference to help reading the formal version.

If there are any differences in translation version of this document formal version takes priority

Datasheet

21/21 TSZ02201-0H1H0B100520-1-2

17.Jun.2013 Rev.001

www.rohm.com

TSZ22111・15・001

BD6346FV

●Physical Dimension Tape and Reel Information

(Unit : mm)

SSOP-B20

0.1

11

10

20

1

0.1± 0.1

6.4 ± 0.3

4.4 ± 0.2

6.5 ± 0.2

0.15 ± 0.1

0.22 ± 0.1

0.65

1.15 ± 0.1

0.3Min.

●Marking Diagram

BD6346

SSOP-B20

(TOP VIEW)

Part Number

LOT Number

1PIN Mark

∗

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

Notice-PGA-E 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 depending on ambient temperature. When used in sealed area, confirm that it is the use in

the range that does not exceed the maximum junction 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-PGA-E 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

A two-dimensional barcode 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 concerned goods might be fallen under listed items of export control prescribed by Foreign exchange and Foreign

trade act, please consult with ROHM 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.

2. ROHM shall not have any obligations where the claims, actions or demands arising from the combination of the

Products with other articles such as components, circuits, systems or external equipment (including software).

3. 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 Products or the information contained in this document. Provided, however, that ROHM

will not assert its intellectual property rights or other rights against you or your customers to the extent necessary to

manufacture or sell products containing the Products, subject to the terms and conditions herein.

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 by you or third parties resulting from inaccuracy or errors of or

concerning such information.

Datasheet

Part Number bd6346fv

Package SSOP-B20

Unit Quantity 2500

Minimum Package Quantity 2500

Packing Type Taping

Constitution Materials List inquiry

RoHS Yes

bd6346fv - Web Page

Distribution Inventory

Buy