[原创] ST L6235三相BLDC马达DMOS驱动方案

ST公司的L6235是集成了过流保护的3相DMOS马达驱动器,包括3相DMOS桥,常关时间PWM电流控制器和用来驱动单端霍尔传感器的译码逻辑,工作电压8-52V,输出峰值电流5.6A,工作频率高达100kHz,具有多种保护功能.本文介绍了L6235主要特性,框图,应用电路图和应用电路材料清单,三相BLDC马达驱动板EVAL6235PD主要特性,电路图,材料清单和PCB设计图.

The L6235 device is a DMOS fully integrated3-phase motor driver with overcurrent protection.Realized in BCD technology, the device combinesisolated DMOS power transistors with CMOS andbipolar circuits on the same chip.

The device includes all the circuitry needed todrive a 3-phase BLDC motor including: a 3-phaseDMOS bridge, a constant off time PWM currentcontroller and the decoding logic for single endedhall sensors that generates the requiredsequence for the power stage.Available in PowerDIP24 (20 + 2 + 2),PowerSO36 and SO24 (20 + 2 + 2) packages, the L6235 device features a non-dissipativeovercurrent protection on the high-side power MOSFETs and thermal shutdown.

L6235主要特性:

 Operating supply voltage from 8 to 52 V
 5.6 A output peak current (2.8 A DC)
 RDS(ON) 0.3 typ. value at Tj = 25 ℃
 Operating frequency up to 100 KHz
 Non-dissipative overcurrent detection andprotection..

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