Dual-channel H-bridge Motor Driver Chip with RDS(ON) Resistance as Low as 610mΩ(HS+LS)

时间： 2021-07-14 来源：Zhongke Microelectronics

技术问答

Hangzhou Zhongke Microelectronics' AT8812 provides an integrated motor driver solution for printers, scanners, and other electromechanical integration applications. AT8812 has a 2-ways H-bridge driver with a maximum driving output of 32V ± 2.0A. It can drive two DC brush motors or one bipolar stepping motor. The bipolar stepping motor can run in full step,2-subdivision, 4-subdivision, or realize high subdivision by software.

The power output module of each H-bridge of AT8812 is composed of N-type power MOSFET, called the H-bridge driver. Each bridge contains a rectifier circuit and a current-limiting circuit. The device adopts an industry-standard parallel digital control interface, and the decay mode is programmable.

Internal shutdown function includes overcurrent protection, short circuit protection, under-voltage lockout protection, and overtemperature protection, and provides a fault detection output pin.

AT8812 provides an ETSSOP28 package with an exposed pad, which can effectively improve the heat dissipation performance, and is a lead-free product that meets environmental protection requirements.

Features

●Dual-channel H-bridge Motor Driver
●Drive Two DC Brushed Motors or One Stepper Motor
●Low RDS(ON) resistance, 610mΩ(HS+LS)
●2.0A Drive Output
●Wide Voltage Supply, 8V-32V
●2 bits Current Control, Providing 4 Current Steps
●Industry Standard Parallel Digital Control Interface
● PWM Winding Current Regulation and Limitation
●Internal 3.3V Reference Voltage Output
●Over-temperature Shutdown Circuit
●Short Circuit Protection
●Undervoltage Lockout Protection

Application

●POS Printer
●Security Camera
● Office Automation Equipment
● Game Console
● Robot

Typical Application Diagram

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