Datasheet

Datasheet

11/19

BD622xxx Series

TSZ02201-0P2P0B300080-1-2

25.Dec.2012 Rev.002

www.rohm.com

© 2012 ROHM Co., Ltd. All rights reserved.

TSZ22111･15･001

●Functional Descriptions

1)

Operation modes

Table 5

Logic table

FIN

RIN

VREF

OUT1

OUT2

Operation

a

L

L

X

Hi-Z*

Hi-Z*

Stand-by (idling)

b

H

L

VCC

H

L

Forward (OUT1 > OUT2)

c

L

H

VCC

L

H

Reverse (OUT1 < OUT2)

d

H

H

X

L

L

Brake (stop)

e

PWM

L

VCC

H

PWM

__________

Forward (PWM control mode A)

f

L

PWM

VCC

PWM

__________

H

Reverse (PWM control mode A)

g

H

PWM

VCC

PWM

__________

L

Forward (PWM control mode B)

h

PWM

H

VCC

L

PWM

__________

Reverse (PWM control mode B)

i

H

L

Option

H

PWM

__________

Forward (VREF control)

j

L

H

Option

PWM

__________

H

Reverse (VREF control)

* Hi-Z : all output transistors are off. Please note that this is the state of the connected diodes,

which differs from that of the mechanical relay.

X : Don’t care

a) Stand-by mode

Stand-by operates independently with the VREF pin voltage. In stand-by mode, all internal circuits are turned off,

including the output power transistors. Motor output goes to high impedance. When the system is switched to

stand-by mode while the motor is running, the system enters an idling state because of the body diodes. However,

when the system switches to stand-by from any other mode (except the brake mode), the control logic remains in the

high state for at least 50µs before shutting down all circuits.

b) Forward mode

This operating mode is defined as the forward rotation of the motor when the OUT1 pin is high and OUT2 pin is low.

When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT1 to OUT2. To operate

in this mode, connect the VREF pin to the VCC pin.

c) Reverse mode

This operating mode is defined as the reverse rotation of the motor when the OUT1 pin is low and OUT2 pin is high.

When the motor is connected between the OUT1 and OUT2 pins, the current flows from OUT2 to OUT1. To operate

in this mode, connect the VREF pin to the VCC pin.

d) Brake mode

This operating mode is used to quickly stop the motor (short circuit brake). It differs from the stand-by mode because

the internal control circuit is operating in the brake mode. Please switch to stand-by mode (rather than the brake

mode) to save power and reduce consumption.

a) Stand-by mode

b) Forward mode

c) Reverse mode

d) Brake mode

Fig.33

Four basic operations (output stage)

M

ON

OFF

OFF

ON

M

OFF

ON

ON

OFF

M

OFF

ON

OFF

ON

OFF

OFF

OFF

OFF

M