Infineon TLE 8444SL四路半桥马达驱动方案

Infineon 公司的TLE 8444SL是四路半桥马达驱动IC,四路半桥功率输出,导通电阻小于1.3欧姆,并行接口控制半桥输出,反相和同相输入以减少MC的连接数量,睡眠模式的功耗很低,不到5uA,3.3V/5V兼容输入,具有短路,超温保护以及内置诊断特性如过压和欠压锁住,开路检测等, 目标应用在单极或双极负载,步进马达以及DC有刷马达.本文介绍TLE 8444SL主要特性, 方框图, 短路保护和开路检测简化电路图, 误差标识产生电路图, DC有刷马达负载应用电路以及双极步进马达负载应用电路.

The TLE 8444SL is a protected Quad-Half-Bridge-IC targeted towards automotive and industrial motion control applications. It is a monolithic die based on Infineon’s smart mixed technology SPT which combines bipolar and CMOS control circuitry with DMOS power devices.

DC-Motors can be driven in forward (cw), reverse (ccw), brake and high impedance modes where as Stepper-Motors can be driven in No-Current, negative / positive output current modes. These various modes can easily be achieved via standard parallel interface of the device to a microcontroller.

The PG-SSOP-24-7 package is advantageous as it saves PCB-board space and costs. The integrated short circuit and over-temperature protection as well as it’s built-in diagnosis features such as over- and under voltage-lockout and open load detection improves system reliability and performance.

TLE 8444SL主要特性:

• 4 Half-Bridge Power Outputs (1.3Ù RDS(ON)MAX @ Tj=150°C)

• Minimum Overcurrent Shutdown at 0.9A

• Simple parallel interface control of Half-Bridge Outputs

• Inverted and Non-inverted Inputs to minimize number of microcontroller connections

• Very low current consumption in sleep mode (max. 5μA)

• Error Flag Diagnosis

• Open Load Diagnosis in ON-state for all outputs

• Outputs protected against overcurrent

• Over temperature protection with hysteresis

• Over and Under voltage lockout

• 3.3V / 5V compatible inputs with hysteresis

• No crossover current

• Internal freewheeling diodes

• Thermally enhanced package (fused leads)

• Green Product (RoHS compliant)

• AEC Qualified

TLE 8444SL目标应用:

• Unipolar or Bipolar Loads

• Stepper Motors (e.g. Idle Speed Control)

• DC brush Motors

图1.TLE 8444SL方框图

图2.TLE 8444SL在LS开关中的短路保护和开路检测简化电路图

图3.TLE 8444SL在HS开关中的短路保护简化电路图

图4.TLE 8444SL误差标识产生概念电路图

图5.DC有刷马达负载应用电路

图6.双极步进马达负载应用电路