1、Infineon TLE 8444SL四路半橋馬達驅動方案Infineon 公司的TLE 8444SL是四路半橋馬達驅動IC,四路半橋功率輸出,導通電阻小于1.3歐姆,并行接口控制半橋輸出,反相和同相輸入以減少MC的連接數量,睡眠模式的功耗很低,不到5uA,3.3V/5V兼容輸入,具有短路,超溫保護以及內置診斷特性如過壓和欠壓鎖住,開路檢測等, 目標應用在單極或雙極負載,步進馬達以及DC有刷馬達.本文介紹TLE 8444SL主要特性, 方框圖, 短路保護和開路檢測簡化電路圖, 誤差標識產生電路圖, DC有刷馬達負載應用電路以及雙極步進馬達負載應用電路.The TLE 8444SL is a p

2、rotected Quad-Half-Bridge-IC targeted towards automotive and industrial motion control applications. It is a monolithic die based on Infineons 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),

3、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 s

4、pace and costs. The integrated short circuit and over-temperature protection as well as its 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

5、°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. 5A) Error Flag Diagnosis Open Load Diagnosis in ON-state for all

6、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 QualifiedTLE 8444SL目標應用: Unipolar or Bipolar Loads Stepper Motors (e.g. Idle Speed Control) DC brush Motors圖1.TLE 8444SL方框圖圖2.TLE 8444SL在LS開關中的短路保護和開路檢測簡化電路圖圖3.TLE 8444SL在HS開關中的短路保護簡化電路圖圖4.TLE 8444SL誤差標識產生概念電路圖圖5.DC有刷馬達負載應用電路AO-Ele