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BQ25703A PD无法充电

Other Parts Discussed in Thread:BQ25703A

用BQ25703A设计1CELL 锂电池充电方案,目前使用TypeC接普通充电器(5V)可以充电,但是接带PD的适配器就无法充电,log显示pd disable,量测CHRG_OK在插入PD适配器后拉高,但很快就拉低了,请教下要使用PD快充,需要从哪方面来看,谢谢!2514.BQ25703A TypeC charge design.pdf

Star Xu:

您好,正在查询,稍后回复

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user5270294:

你好,针对BQ25703A chrg_ok在插上充电器后拉高,然后马上拉低的问题,可以给出一些建议吗,谢谢!

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Star Xu:

您好

Let's start by debugging why CHRG_OK is pulled low shortly after the USB PD adapter is plugged in. CHRG_OK should stay high as long as the VBUS voltage is valid (VVBUS_CONVEN < VBUS < VACOV) and there are no faults.

Can you please capture a waveform showing VBUS, CHRG_OK, REGN, and VSYS on the same graph, similar to Figure 48 in the datasheet?

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user5270294:

问题已经解决,是软件设置问题,谢谢!

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