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TPS53681控制其3路A通道PWM输出相应的电压

Other Parts Discussed in Thread: TPS53681

您好,目前我们使用了TPS53681电源芯片,原理图设置是期望通过PMBus的SDA和SCL软件控制其A通道的PWM1/PWM2/PWM3可输出0.42V左右的电压,电流范围较大有10多安培,IIC读写寄存器都是OK的, 将0X00寄存器设置为0X00,0x02寄存器设置为0x13,0x01寄存器设置为0x80,0x21寄存器设置为0x001D,对应VID为0.39V左右,其它寄存器使用默认值,但是在PWM输出端未测得任何电压值,所以咨询下,通过发送命令操作TPS53681使其PWM输出相应电压的控制流程应该是怎样的,或者有没有相应的开发DEMO,望回复,谢谢