BD6373GW Ver la hoja de datos (PDF) - ROHM Semiconductor

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componentes Descripción

Fabricante

BD6373GW

6ch System Lens Drivers for Digital Still Cameras / Single-lens Reflex Cameras

ROHM Semiconductor 

BD6373GW, BD6873KN, BD6753KV

Bypass filter Capacitor for

power supply input. (p.14/16)

Power-saving (p.8/16)

H : Active

L : Standby

Motor control input

(p.8/16)

Drive mode selection

(p.8/16)

H : EN/IN

L : IN/IN

Motor control input

(p.8/16)

Drive mode selection

(p.8/16)

H : EN/IN

L : IN/IN

Motor control input

(p.8/16)

Drive mode selection

(p.8/16)

H : EN/IN

L : IN/IN

Motor control input

brake function (p.8/16)

H : Brake

PS 38

IN1A 47

IN1B 48

IN2A 1

IN2B 2

SEL1 3

IN3A 4

IN3B 5

IN4A 8

IN4B 9

SEL2 10

IN5A 11

IN5B 12

SEL3 13

BRK1 14

Power Save

Logic12

Logic34

Logic5

1～100uF

VCC

6

TSD & UVLO

Level Shift

&

Pre Driver

Level Shift

&

Pre Driver

Level Shift

&

Pre Driver

BandGap

H bridge

Full ON

H bridge

Full ON

H bridge

Full ON

H bridge

Full ON

H bridge

Full ON

Motor control input

(p.8/16)

EN1 36

IN6 37

Logic6

VREF

Level Shift

&

Pre Driver

Selector

H bridge

Const. Current

When using the VREF voltage (1.2V) resistance division

value as VLIMH and VLIML input value, select R1, R2, and R3

values such that,

2kΩ≦R1+R2+R3≦20kΩ (p.9/16)

23

26

VREF

VLIMS

24

25

VLIMH VLIML

R1

R2

R3

7

GND

Output current selection

(p.10/16)

H : VLIML

L : VLIMH

Fig.19 BD6873KN Application Circuit Diagram

Technical Note

Bypass filter Capacitor for

power supply input. (p.14/16)

1～100uF

41

VM1

39 OUT1A

M

40 OUT1B

45 OUT2A

46 OUT2B

44 PGND1

1～100uF

17

VM2

15 OUT3A

M

16 OUT3B

21 OUT4A

22 OUT4B

20 PGND2

1～100uF

34

VM3

32 OUT5A

35 OUT5B

33 PGND3

1～100uF

28

VM4

27

OUT6A

31 OUT6B

RNF

29

30

0.1Ω~5.0Ω

SENSE

Bypass filter Capacitor for

power supply input. (p.14/16)

Bypass filter Capacitor for

power supply input. (p.14/16)

Bypass filter Capacitor for

power supply input. (p.14/16)

The output current is converted to a voltage with

the RNF external resistor and transmitted to the

SENSE pin. (p.10/16)

Iout[A] = (VLIMH or VLIML[V])÷RNF[Ω]

3) H-bridge

The 6-channel H-bridges of can be controlled independently. For this reason, it is possible to drive the H-bridges

simultaneously, as long as the package thermal tolerances are not exceeded.

The H-bridge output transistors of the BD6373GW, BD6873KN and BD6753KV consist of Power CMOS, with the motor

power supply VM, and Power DMOS, with the charge pump step-up power supply VG, respectively. The total H-bridge

ON-Resistance on the high and low sides varies with the VM and VG voltages, respectively. The system must be

designed so that the maximum H-bridge current for each channel is 800mA or below.

4) Drive system of Linear Constant-Current H-bridge (BD6873KN: ch6)

BD6873KN (ch6) enables Linear Constant-Current Driving.

(1) Reference voltage output (with a tolerance of ±3%)

The VREF pin outputs 1.2V, based on the internal reference voltage. The output current of the Constant-Current Drive

block is controllable by connecting external resistance to the VREF pin of the IC and applying a voltage divided by the

resistor to the output current setting pins (VLIMH and VLIML pins). It is recommended to set the external resistance to

2kΩ or above in consideration of the current capacity of the VREF pin, and 20kΩ or below in order to minimize the

fluctuation of the set value caused by the base current of the internal transistor of the IC.

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9/17

2009.06 - Rev.A

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