aerobotics

Dual-channel DC motor drive module-RZ7899+optical coupler isolation

 
Overview

Product Introduction

This module uses two RZ7899 as driver chips. Each chip can withstand 3A drive current and 3V-25V drive voltage.
The MCU pins can be used to directly control the OUTA and OUTB output states.
Both outputs can independently control a DC motor to move forward, backward, and brake; the combination of the two outputs can drive a two-phase four-wire stepper motor.
Applications include: DC motor drive; automatic valve motor drive; electromagnetic door lock drive; semiconductor refrigeration chip drive, etc.

Pin function table

Symbol
Description
VCC, GND
DC motor power input, 3V-25V
DVCC, DGND
PWM logic input reference voltage
A1, A2
PWM logic input, control OUTA output, <25kHz
B1, B2
PWM logic input, control OUTB output, <25kHz
OUTA
output terminal OUTA
OUTB
output terminal OUTB
[ +3.3 VI +5 ]
Optocoupler input terminal Current limiting resistor select shorting cap, short [ +3.3 VI ] Current limiting resistor is R9, short [ VI +5 ] Current limiting resistor is R10
[ DVCC VO VCC ]
Optocoupler output terminal VCE power supply select shorting cap, short [ DVCC VO ] VCE power supply is DVCC, short [ VO VCC ] VCE power supply is VCC, it is recommended to select VCC for VCE power supply
[ DGND GND ]
Common ground select shorting cap, no soldering is required
Improvement Description

This module adds EL357N based on the original project As optocoupler isolation




参考设计图片
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Update:2025-07-03 22:26:14

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