ROHM BD6757KN, BD6889GU Technical data

System Lens Driver Series for Digital Still Cameras / Single-lens Reflex Cameras

7ch System Lens Drivers for
Digital Still Cameras / Single-lens Reflex Cameras

BD6757KN, BD6889GU

No.09014EAT04

●Description

BD6757KN and BD6889GU motor drivers provide 6 Full-ON Drive H-bridge channels and 1 Linear Constant-Current Drive
H-bridge channel. Stepping motors can be used for the auto focus, zoom, and iris, making it possible to configure a
sophisticated, high precision lens drive system. ROHM’s motor drivers are both compact, multifunctional, and enable
advanced features such as lens barrier and anti shock.

●Features

1) Subminiature grid array package: 5.0  5.0  1.2mm

3

(BD6889GU)

2) DMOS output allowing a range power supply: 2.0V to 8.0V (BD6757KN)

3) Low ON-Resistance Power MOS output:
Full-ON Drive block with 1.3Ω Typ. and Linear Constant-Current Drive block with 0.9Ω Typ. (BD6757KN, BD6889GU)

4) Built-in two digital NPN transistor circuits for photo-interrupter waveform shaping:
Input-dividing type with output pull-up resistance (BD6757KN)

5) Built-in four digital NPN transistor circuits for photo-interrupter waveform shaping:
Input-dividing type with output pull-up resistance (BD6889GU)

6) Built-in four digital PNP transistor circuits for photo-interrupter waveform shaping:
Input-dividing type with output pull-down resistance (BD6889GU)

7) Built-in voltage-regulator circuit for photo-interrupter (BD6889GU)

8) Built-in two-step output current setting switch for the Linear Constant-Current Drive block (BD6757KN)

9) 0.9V±2% high-precision reference voltage output

10) Constant-Current Drive block features phase compensation capacitor-free design

11) Built-in ±3% high-precision Linear Constant-Current Driver

12) Built-in charge pump circuit for the DMOS gate voltage drive(BD6757KN)

13) UVLO (Under Voltage Lockout Protection) function

14) Built-in TSD (Thermal Shut Down) circuit

15) Standby current consumption: 0μA (Typ.)

●Absolute Maximum Ratings

Parameter Symbol

BD6757KN BD6889GU

Limit

Unit

Power supply voltage VCC -0.5 to +7.0 -0.5 to +7.0 V
Motor power supply voltage VM -0.5 to +10.0 -0.5 to +7.0 V
Charge pump voltage VG 15.0 None V
Control input voltage VIN -0.5 to VCC+0.5 -0.5 to VCC+0.5 V
Power dissipation Pd 950

Operating temperature range Topr -25 to +75 -25 to +85 °C

1

※

980

2

※

mW

Junction temperature Tjmax +150 +150 °C
Storage temperature range Tstg -55 to +150 -55 to +150 °C
H-bridge output current Iout -800 to +800

※1 Reduced by 7.6mW/°C over 25°C, when mounted on a glass epoxy board (70mm  70mm  1.6mm).
※2 Reduced by 7.84mW/°C over 25°C, when mounted on a glass epoxy board (70mm  70mm  1.6mm).
※3 Must not exceed Pd, ASO, or Tjmax of 150°C.

3

※

-800 to +800

3

※

mA/ch

●Operating Conditions (Ta=-25 to +75°C(BD6757KN), -25 to +85°C(BD6889GU))

Parameter Symbol

BD6757KN

Limit

BD6889GU

Unit

Power supply voltage VCC 2.5 to 5.5 2.5 to 5.7 V
Motor power supply voltage VM 2.5 to 8.0 2.5 to 5.7 V
Control input voltage VIN 0 to VCC 0 to VCC V
H-bridge output current Iout -500 to +500

※4 Must not exceed Pd or ASO.

4

※

-500 to +500

4

※

mA/ch

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© 2009 ROHM Co., Ltd. All rights reserved.

1/15

2009.06 - Rev.A

BD6757KN, BD6889GU

●Electrical Characteristics

1) BD6757KN Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=3.0V, VM=5.0V)

Parameter Symbol

Min. Typ. Max.

Limit

Unit Conditions

Overall

Technical Note

Circuit current
during standby operation

ICCST - 0 10 μA PS=0V

Circuit current ICC - 1.0 3.0 mA PS=VCC with no signal

Control input (IN=PS, IN1A to IN7B, and LIMSW)

High level input voltage VINH 2.0 - - V

Low level input voltage VINL - - 0.7 V

High level input current IINH 15 30 60 μA VINH=3V

Low level input current IINL -1 0 - μA VINL=0V

Pull-down resistor RIN 50 100 200 kΩ

Charge pump

Charge pump voltage VCP 10 11 - V

UVLO

UVLO voltage VUVLO 1.6 - 2.4 V

Full-ON Drive block (ch1 to ch6)

Output ON-Resistance RON - 1.3 1.6 Ω

Io=±400mA on high and low sides
in total

Pulse input response tp 100 - - ns With an input pulse with of 200ns

Linear Constant-Current Drive block (ch7)

Output ON-Resistance RON - 0.9 1.1 Ω

Io=±400mA on high and low sides
in total

VREF output voltage VREF 0.88 0.90 0.92 V Iout=0~1mA

Output limit current 1 IOL1 388 400 412 mA

Output limit current 2 IOL2 285 300 315 mA

Output limit current 3 IOL3 190 200 210 mA

RNF=0.5Ω with a load of 10Ω
VLIMH(L)=0.2V, LIMSW=0V(3V)
RNF=0.5Ω with a load of 10Ω
VLIMH(L)=0.15V, LIMSW=0V(3V)

RNF=0.5Ω with a load of 10Ω
VLIMH(L)=0.1V, LIMSW=0V(3V)

Digital NPN transistor block for photo-interrupter waveform shaping

Input current ISIH - - 0.1 mA SIx=3V

Low level output voltage VSOL - 0.1 0.25 V SIx=3V, ISO=0.5mA

Input dividing resistance RSIL 70 100 130 kΩ

Output pull-up resistance RSOH 5 10 20 kΩ

5

※

5

※

Input dividing resistance
comparison

※5 Design target value (Not all shipped devices are fully tested.)

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© 2009 ROHM Co., Ltd. All rights reserved.

- 0.8 1.0 1.2 -

2/15

Division resistance comparison
between SIx and GND

5

※

2009.06 - Rev.A

BD6757KN, BD6889GU

Technical Note

2) BD6889GU Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=3.0V, VM=5.0V)

Parameter Symbol

Min. Typ. Max.

Limit

Unit Conditions

Overall

Circuit current
during standby operation

ICCST - 0 10 μA PS=0V

Circuit current ICC - 1.5 3.0 mA PS=VCC with no signal

Control input (IN=PS, IN1A to IN7B, SW, DSW, DSEL1, and DSEL2)

High level input voltage VINH 2.0 - - V

Low level input voltage VINL - - 0.7 V

High level input current IINH 15 30 60 μA VINH=3V

Low level input current IINL -1 0 - μA VINL=0V

Pull-down resistor RIN 50 100 200 kΩ

UVLO

UVLO voltage VUVLO 1.6 - 2.4 V

Full-ON Drive block (ch1 to ch6)

Output ON-Resistance RON - 1.3 1.6 Ω

Io=±400mA on high and low sides
in total

Pulse input response tp 100 - - ns With an input pulse with of 200ns

Linear Constant-Current Drive block (ch7)

Output ON-Resistance RON - 0.9 1.1 Ω

Io=±400mA on high and low sides
in total

VREF output voltage VREF 0.88 0.90 0.92 V Iout=0~1mA

Output limit current 1 IOL1 388 400 412 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.2V

Output limit current 2 IOL2 285 300 315 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.15V

Output limit current 3 IOL3 190 200 210 mA RNF=0.5Ω with a load of 10Ω, VLIM=0.1V

Digital NPN transistor block for photo-interrupter waveform shaping

Input current ISIH - - 0.1 mA SIx=3V

Low level output voltage VSOL - 0.1 0.25 V SIx=3V, ISO=0.5mA

Input dividing resistance RSIN 70 100 130 kΩ

Output pull-up resistance RSOH 23 33 43 kΩ

Input dividing resistance
comparison

- 0.8 1.0 1.2 -

Division resistance comparison
between SIx and GND

6

※

Digital PNP transistor block for photo-interrupter waveform shaping

Input current ISIL -0.1 - - mA SIx=0V

High level output voltage VSOH VCC-0.25 VCC-0.1 - V SIx=0V, ISO=-0.5mA

Input dividing resistance RSIP 70 100 130 kΩ

Output pull-down resistance RSOL 23 33 43 kΩ

Input dividing resistance
comparison

- 0.8 1.0 1.2 -

Division resistance comparison
between SIx and VCC

6

※

Voltage-regulator for photo-interrupter

High level output voltage VREGH VCC-0.25 VCC-0.2 - V IREG=100mA

Output ON-Resistance RONREG - 2 2.5 Ω IREG=100mA

Output leak current ILPI - 0 1 μA SW=VCC

※6 Design target value (Not all shipped devices are fully tested.)

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3/15

2009.06 - Rev.A

BD6757KN, BD6889GU

●Electrical Characteristic Diagrams

1250

1000

940mW

750

570mW

500

250

Power dissipation : Pd [mW]

0

0 25 50 75 100 125 150

Ambient t emperature : Ta [° C]

Fig.1 Power Dissipation Reduction

5.0

4.0

3.0

2.0

1.0

Circuit current : ICC [mA]

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Fig.4 Circuit current

(2.5V to 5.7V)

Supply voltag e : VCC [V]

5.0

4.0

3.0

2.0

1.0

Output ON resistance : RON [Ω]

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Fig.7 Output ON-Resistance

(Full-ON Drive block)

(2.5V to 5.7V)

Supply voltag e : VM [V]

75°C

Op. range

Op. range

BD6757KN

BD6889GU

Top 8 5 ° C
Mid 25°C
Low -25°C

BD6889GU

Top 8 5 ° C
Mid 25°C
Low -25°C

1250

980mW

1000

750

510mW

500

250

Power dissipation : Pd [mW]

0

0 25 50 75 100 125 150

Ambient t emperature : Ta [° C]

BD6889GU

85°C

Fig.2 Power Dissipation Reduction

5.0

4.0

3.0

2.0

1.0

Output ON resistance : RON [Ω]

0.0

9.0 10.0 11.0 12.0 13.0 14. 0 15. 0

Supply voltag e : VG [V]

BD6757KN

Top 7 5 ° C
Mid 25°C
Low -25°C

Fig.5 Output ON-Resistance

(Full-ON Drive block)

Op. range

BD6889GU

Top 8 5 ° C
Mid 25°C
Low -25°C

5.0

4.0

3.0

2.0

1.0

Output ON resistance : RON [Ω]

0.0

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

(2.5V to 5.7V)

Supply voltag e : VM [V]

Fig.8 Output ON-Resistance

(Linear Constant-Current Drive block)

5.0

4.0

3.0

2.0

1.0

Circuit current : ICC [mA]

0.0

5.0

4.0

3.0

2.0

1.0

Output ON resistance : RON [Ω]

0.0

(Linear Constant-Current Drive block)

250

200

150

100

RNF voltage : VRNF [mV]

Technical Note

BD6757KN

Top 7 5 ° C
Mid 25°C
Low -25°C

Op. range

(2.5V to 5.5V)

0.0 1.0 2.0 3.0 4.0 5.0 6.0 7.0

Supply voltag e : VCC [V]

Fig.3 Circuit current

BD6757KN

Top 7 5 ° C
Mid 25°C
Low -25°C

9.0 10.0 11.0 12. 0 13. 0 14.0 15.0

Supply voltag e : VG [V]

Fig.6 Output ON-Resistance

BD6757KN, BD6889GU

50

0

0 50 100 150 200 250

VLIM voltage : VLIM [mV]

Fig.9 Output limit voltage

(RNF=0.5Ω)

Top 8 5 ° C
Mid 25°C
Low -25°C

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© 2009 ROHM Co., Ltd. All rights reserved.

4/15

2009.06 - Rev.A

BD6757KN, BD6889GU

Technical Note

●Pin arrangement and Pin Function

39

VG

CP4

CP3

CP2

CP1

VM3

IN4B

IN4A

SI1

SI2

OUT5A

OUT5B

PGND2

OUT6A

OUT6B

OUT7A

RNF

OUT7B

SENSE

SO2

SO1

52

IN3B

BD6757KN

IN7B

VM4

IN7A

GND

VREF

VLIMH

VM2

IN3A

IN2B

IN2A

IN1B

26

IN1A

OUT4A

OUT4B

OUT3A

OUT3B

PGND1

OUT2B

OUT2A

OUT1B

OUT1A

IN5A

IN5B

VLIML

LIMSW

VCC

VM1

PS

IN6B

IN6A

13

Fig.10 BD6757KN Pin Arrangement (Top View)

UQFN52 Package

BD6757KN Pin Function Table

No. Pin Name Function No. Pin Name Function

1 IN7B Control input pin ch7 B 27 IN2A Control input pin ch2 A
2 VM4 Motor power supply pin ch7 28 IN2B Control input pin ch2 B
3 IN7A Control input pin ch7 A 29 IN3A Control input pin ch3 A
4 GND Ground Pin 30 VM2 Motor power supply pin ch3 and ch4
5 VREF Reference voltage output pin 31 CP1 Charge pump capacitor connection pin 1
6 VLIMH Output current setting pin 1 ch7 32 CP2 Charge pump capacitor connection pin 2
7 VLIML Output current setting pin 2 ch7 33 CP3 Charge pump capacitor connection pin 3
8 LIMSW Output current setting selection pin ch7 34 CP4 Charge pump capacitor connection pin 4

9 VCC Power supply pin 35 VG Charge pump output pin
10 VM1 Motor power supply pin ch1 and ch2 36 VM3 Motor power supply pin ch5 and ch6
11 PS Power-saving pin 37 IN3B Control input pin ch3 B
12 IN6B Control input pin ch6 B 38 IN4A Control input pin ch4 A
13 IN6A Control input pin ch6 A 39 IN4B Control input pin ch4 B
14 IN5B Control input pin ch5 B 40 SI1 Digital transistor input pin 1
15 IN5A Control input pin ch5 A 41 SI2 Digital transistor input pin 2
16 OUT1A H-bridge output pin ch1 A 42 OUT5A H-bridge output pin ch5 A
17 OUT1B H-bridge output pin ch1 B 43 OUT5B H-bridge output pin ch5 B
18 OUT2A H-bridge output pin ch2 A 44 PGND2 Motor ground pin ch5 and ch6
19 OUT2B H-bridge output pin ch2 B 45 OUT6A H-bridge output pin ch6 A
20 PGND1 Motor ground pin ch1 to ch4 46 OUT6B H-bridge output pin ch6 B
21 OUT3B H-bridge output pin ch3 B 47 OUT7A H-bridge output pin ch7 A
22 OUT3A H-bridge output pin ch3 A 48 RNF Resistance connection pin for output current detection ch7
23 OUT4B H-bridge output pin ch4 B 49 OUT7B H-bridge output pin ch7 B
24 OUT4A H-bridge output pin ch4 A 50 SENSE Output current detection pin ch7
25 IN1A Control input pin ch1 A 51 SO2 Digital transistor output pin 2
26 IN1B Control input pin ch1 B 52 SO1 Digital transistor output pin 1

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5/15

2009.06 - Rev.A