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Created Jun 09, 2025 by jizh@jizhMaintainer

LKS32MC452FPCT8芯片PWM通道配置问题

  1. LKS32MC452FPCT8为合封6N预驱的芯片,经过测试后发现芯片的HO和LO输出逻辑正好反了。

当软件配置上管输出25%高电平时,上管输出的是75%的高电平,下管为25%的高电平。

与梅秀杰沟通后发现芯片内部PWM的P/N通道与6931预驱的HIN和LIN打线是反的,即芯片的PWM_P连接到了6931的LIN,PWM_N连接到了6931的HIN,具体细节见附件的截图与芯片打线设计文件。

建议该设计在LKS32MC45x_6N_DS手册中进行标注,推荐用户软件配置使能PWM的PN通道交换,不然实际输出的PWM逻辑会错误。 452+693145x_+_BP6931x2__QFP80_LKS32MC452FPCT8_2023.11.01.pdf

2.另外还发现 LKS32MC45x_6N_DS手册中标注了芯片有6个OPA资源,实际452芯片只有5个OPA资源,需要手册进行修改。452_OPA

Edited Jun 09, 2025 by jizh
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