ROHM BD6735FV, BD6736FV Technical data

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

1 to 2ch Lens Drivers
for Single-Lens Reflex Cameras

BD6735FV, BD6736FV

No.09014EAT03

●Description

The BD6735FV motor driver provides 2 Full-ON Drive H-bridge channels, while BD6736FV provides 1 Full-ON Drive H-bridge
channel. ROHM’s lens driver series features high voltage resistance and large current output in a compact surface mount
package, making it ideally suited for smaller systems such as Single-Lens Reflex with Interchangeable Lenses.

●Features

1) Low ON-Resistance Power MOS output: Full-ON Drive block with 1.0Ω Typ. (BD6735FV)
Full-ON Drive block with 0.35Ω Typ. (BD6736FV)

2) DMOS output allowing a range power supply: 2.0V to 8.0V (BD6735FV), 2.0V to 9.0V (BD6736FV)

3) Built-in step-up circuit for the DMOS gate voltage drive

4) Drive mode switching function

5) H bridge maximum output current: DC maximum 1.0A (BD6735FV and BD6736FV), Peak maximum 3.2A (BD6736FV)

6) UVLO (Under Voltage Lockout Protection) function

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

8) Standby current consumption: 0μA Typ.

●Absolute Maximum Ratings

Parameter Symbol

BD6735FV BD6736FV

Limit

Unit

Power supply voltage VCC -0.5 to +10.0 -0.5 to +10.0 V

Motor power supply voltage VM -0.5 to +10.0 -0.5 to +10.0 V

Charge pump step-up power supply voltage VBST -0.5 to +15.0 -0.5 to +15.0 V

Control input voltage VIN -0.5 to VCC+0.5 -0.5 to VCC+0.5 V

Power dissipation Pd 810

1

※

810

1

※

mW

Operating temperature range Topr -30 to +75 -30 to +75 ℃

Junction temperature Tjmax +150 +150 ℃

Storage temperature range Tstg -55 to +150 -55 to +150 ℃

2

H-bridge output current (DC) Iout -1000 to +1000

※

-1000 to +1000

H-bridge output current (Peak) Ipeak - -3200 to +3200

※1 Reduced by 6.48mW/°C over 25℃, when mounted on a glass epoxy board (70mm  70mm  1.6mm).
※2 Must not exceed Pd, ASO, or Tjmax of 150℃
※3 Peak=100msec

2

※

mA/ch

3

※

mA/ch

●Operating Conditions (Ta=-30 to +75℃)

Parameter Symbol

BD6735FV BD6736FV

Limit

Power supply voltage VCC 2.0 to 8.0 2.0 to 9.0 V

Motor power supply voltage VM 2.0 to 8.0 2.0 to 9.0 V

Control input voltage VIN 0 to VCC 0 to VCC V

Logic input frequency FIN 0 to 100 0 to 100 kHz

Min. logic input pulse width TIN 0.5 0.5 μs

Unit

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

1/8

2009.06 - Rev.A

BD6735FV, BD6736FV

Technical Note

●Electrical Characteristics

1) BD6735FV and BD6736FV Electrical Characteristics (Unless otherwise specified, Ta=25°C, VCC=5.0V, VM=5.0V)

Parameter Symbol

Min. Typ. Max.

Limit

Unit Conditions

Overall
Circuit current

during standby operation

ICCST - 0 1 μA PS=0V

Circuit current (BD6735FV) ICC 0.5 2.0 4.0 mA PS=H, FIN=100kHz
Circuit current (BD6736FV) ICC 0.5 1.5 4.0 mA PS=H, FIN=100kHz
Power saving (PS)
High-level input voltage VPSH 2.0 - VCC V
Low-level input voltage VPSL -0.3 - 0.5 V
High-level input current IPSH 25 50 100 μA VPSH=5V
Low-level input current IPSL -1 0 1 μA VPSL=0V
Control input (BD6735FV; INxA, INxB, PWMEN, and BD6736FV; INA, INB, PWM)
High-level input voltage VINH 2.0 - VCC V
Low-level input voltage VINL -0.3 - 0.7 V
High-level input current IINH 25 50 100 μA VINH=5V
Low-level input current IINL -1 0 1 μA VINL=0V
UVLO
UVLO voltage VUVLO 1.5 - 1.9 V
BD6735FV Full-ON Drive block (ch1 and ch2)
Output ON-Resistance RON - 1.0 1.35 Ω Io=700mA on high and low sides in total
BD6736FV Full-ON Drive block (ch1)
Output ON-Resistance RON - 0.35 0.5 Ω Io=500mA on high and low sides in total

●Electrical Characteristics

1000

800

810mW

BD6735FV, BD6736FV

600

486mW

400

200

Power dissipation : Pd [mW]

0

0 25 50 75 100 125 150

Ambient temperature : Ta [°C]

75°C

Fig.1 Power Dissipation Reduction

800

600

BD6735FV

Top 7 5° C
Mid 25°C
Low -30°C

400

: VDSL [mV]

DS

200

Output V

0

0 200 400 600 800 1000

Output current : I

OUT

[mA]

Fig.4 Output ON-Voltage on Low-Side

5.0

4.0

3.0

2.0

1.0

Circuit current : ICC [mA]

0.0

0.0 2.0 4.0 6. 0 8.0 10.0

Fig.2 Circuit current

250

200

150

: VDSH [mV]

DS

100

50

Output V

0

0 200 400 600 800 1000

Fig.5 Output ON-Voltage on High-Side

BD6735FV, BD6736FV

BD6736FV Op. range

(2.0V to 9.0V)

BD6735FV Op. range

(2.0V to 8.0V)

Top 7 5° C
Mid 25°C
Low -30°C

Supply voltag e : VCC [V]

Top 7 5° C
Mid 25°C
Low -30°C

Output current : I

OUT

BD6736FV

[mA]

800

600

400

: VDSL [mV]

DS

200

Output V

0

0 200 400 600 800 1000

Output current : I

Fig.3 Output ON-Voltage on High-Side

250

200

150

: VDSH [mV]

DS

100

50

Output V

0

0 200 400 600 800 1000

Output current : I

Fig.6 Output ON-Voltage on Low-Side

BD6735FV

Top 7 5° C
Mid 25°C
Low -30°C

[mA]

OUT

BD6736FV

Top 7 5° C
Mid 25°C
Low -30°C

[mA]

OUT

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

2/8

2009.06 - Rev.A

BD6735FV, BD6736FV

●Application Circuit Diagram, Pin Function, and Pin Arrangement

Bypass filter Capacitor for
power supply input. (p.7/8)

Power-saving (p.5/8)

H : Active
L : Standby

Motor control input
(p.5/8)

Drive mode selection
(p.5/8)

H : EN/IN
L : IN/IN

PS

IN1A

IN1B

IN2A

IN2B

PWME N

20

19

18

17

16

15

Power Save

Logic

Power Save

OSC Charge Pump Charge Pump

10

GND

Connecting capacitors between the CPL1 and C PL2, CPH1 and CPH2, and BST and GND pins generate a
BST voltage. Use caution to ensure that the vo ltage differential between BST and VM is 3.0V or higher, and that
the BST voltage does not exceed the absolute maximum rating of 15V, especially set the BST voltage direct
input.(p.5/8)

Fig.7 BD6735FV Application Circuit Diagram

1～100uF

Level Shift

Pre Driver

14 12 9

CPL1 CPL2

0.1μF 0.1μF 1.0μF

VCC

1

BST

&

13

No. Pin Name Function

1 VCC Power supply pin
2 MGND2 Motor ground pin 2
3 OUT4 H-bridge output pin 4
4 OUT3 H-bridge output pin 3
5 VM Motor power supply pin
6 OUT1 H-bridge output pin 1
7 OUT2 H-bridge output pin 2
8 MGND1 Motor ground pin 1

9 BST Charge pump step-up power supply pin
10 GND Ground pin
11 CPH2 Capacitor connection pin for second charge 2
12 CPH1 Capacitor connection pin for second charge 1
13 CPL2 Capacitor connection pin for first charge 2
14 CPL1 Capacitor connection pin for first charge 1
15 PWMEN Drive mode selection pin
16 IN2B Control input pin ch2 B
17 IN2A Control input pin ch2 A
18 IN1B Control input pin ch1 B
19 IN1A Control input pin ch1 A
20 PS Power-saving pin

Fig.8 BD6735FV Pin Arrangement (Top View)

BandGapTSD & UVLO

5

6

7

4

3

2

8

BST

CPH1

H bridge

Full ON

H bridge

Full ON

11

CPH2

BD6735FV Pin Function Table

1～100uF

VM

OUT1

OUT2

OUT3

OUT4

MGND2

MGND1

Technical Note

Bypass filter Capacitor for
power supply input. (p.7/8)

M

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

3/8

2009.06 - Rev.A