AM9469

Document number: DS38810 Rev. 2 - 2

6 of 16

www.diodes.com

April 2018

© Diodes Incorporated

AM9469

Operating Characteristics

Standby and Start-Up Timing

When the PWM Pin input signal is logic

―L‖ level continuously for a longer time than tSLP, the device enters standby mode as shown below. When

the PWM P

in signal is ―H‖ level, the device turns active and operates normally. The PWM Pin is also used to control the motor speed with external

PWM signal into this pin. The lowest frequency PWM signal is defined by tSLP, i.e. the PWM duty low time has to be smaller tSLP for motor speed

control.

tSLP = 400µs typical

PWM

HB

OUT1/OUT2

VDD

Active

Stand-by

Active

Stand-by

Active

tSLP

tSLP

In Normal Operation/Rotation

PWM

O1

O2

FG

IN1-IN2

RD

HYS

HYS

Truth Table for Various Modes with PWM Pin

IN1

IN2

PWM

OUT1

OUT2

FG

MODE

H

L

H

H

L

L

Drive

L

L

L

Regenerate

L

H

H

L

H

OFF

Drive

L

L

L

Regenerate