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© 2018 ROHM Co., Ltd. All rights reserved.

11.Dec.2018 Rev.001

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TSZ22111 • 15 • 001

BD64220EFV

TSZ02201-0P2P0C302010-1-2

Function Explanation

○PS/ Power Save Pin

The PS pin can make circuit standby state and make motor output OPEN.

When PS=L→H, be careful because there is a

delay of 40

μs (Max) before it is returned from standby state to normal state and the motor output becomes ACTIVE.

PS

Status

L

Standby state

H

ACTIVE

○IN1A, IN1B, IN2A, IN2B/ H bridge Control Pin

This is the pin to decide output pin logic.

Input

Output

Status

PS

IN1A

IN2A

IN1B

IN2B

OUT1A

OUT2A

OUT1B

OUT2B

L

X

(Note 1)

X

(Note 1)

OPEN

OPEN

POWER SAVE (STANDBY)

H

L

L

OPEN

OPEN

STOP

H

H

L

H

L

FORWARD

H

L

H

L

H

REVERSE

H

H

H

L

L

BREAK

(Note 1) x = Low or High

○VCC1, VCC2/ Power Supply Pin

Motor’s drive current is flowing in it, so the wire is thick, short and has low impedance. Voltage VCC may have great

fluctuation due to counter electromotive force of the motor, PWM switching noise etc. So arrange the bypass capacitor of 100

µF to 470 µF as close to the pin as possible and adjust the voltage VCC is stable. Increase the capacity as needed especially,

when a large current is used or those motors that have great back electromotive force are used.

In addition, for the purpose of reducing of power supply’s impedance in wideband, it is recommended to set parallel

connection of multi-layered ceramic capacitor of 0.01 µF to 0.1 µF etc. Extreme care must be used to make sure that the

voltage VCC does not exceed the rating even for a moment. VCC1 and VCC2 are shorted inside IC, but be sure to short

externally VCC1 and VCC2 when using. If used without shorting, malfunction or destruction may occur because of

concentration of current routes etc. Still more, in the power supply pin, there is built-in clamp component for preventing of

electrostatic destruction. When a steep pulse signal or voltage such as a surge the absolute maximum rating or more is

applied, this clamp component operates, as a result there is the danger of destruction, so be sure that the absolute

maximum rating must not be exceeded. It is effective to mount a Zener diode of about the absolute maximum rating.

Moreover, the diode for preventing of electrostatic destruction is inserted between the VCC1, VCC2 and GND pin, as a result

there is the danger of IC destruction if reverse voltage is applied between the VCC1, VCC2 and GND pin, so be careful.

○GND/ Ground Pin

In order to reduce the noise caused by switching current and to stabilize the internal reference voltage of IC, the wiring

impedance from this pin is made as low as possible to achieve the lowest electrical potential no matter what operating state it

can be. Moreover, design patterns not to have any common impedance with other GND patterns.

○OUT1A, OUT1B, OUT2A, OUT2B/ H Bridge Output Pin

Motor’s drive current is flowing in it, so the wire is thick, short and has low impedance. It is also effective to add a Schottky

diode if output has positive or negative great fluctuation when large current, for example, counter electromotive voltage etc.,

is used. Moreover, in the output pin, there is built-in clamp component for preventing of electrostatic destruction. When a

steep pulse signal or voltage such as a surge exceeding the absolute maximum rating is applied, this clamp component

operates, as a result there is the danger of even destruction, so be sure that the absolute maximum rating must not

exceeded.

Connect the resistor of 0.1 Ω to 0.3 Ω for current detection between this pin and GND. Determine the resistor so that power

low impedance and does not have a common impedance with other GND patterns because motor’s drive current flows in the

not flow either, so do not let it open.

(Note 2) x = 1 or 2