BQ25606 STAT,PG脚问题;
电路调试测试好,不断反复充电后几周,再插上USB,USB电压正常5V,PG脚没有变低电平(有上拉电源,用的是SYS脚的),STAT脚乱闪(电池完全借入),看现象是BQ25606这几个脚损坏,是哪里引起的原因,之前一直可以用的。
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BQ25606 STAT,PG脚问题;
电路调试测试好,不断反复充电后几周,再插上USB,USB电压正常5V,PG脚没有变低电平(有上拉电源,用的是SYS脚的),STAT脚乱闪(电池完全借入),看现象是BQ25606这几个脚损坏,是哪里引起的原因,之前一直可以用的。
您好,The PG and STAT pins are not explicitly designed to support extra capacitance.
您好,请参考下面内容:
Please visit https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/890626/faq-bq25606-schematic-review-and-pcb-layout-design-tips for BQ25606: Schematic Review and PCB Layout Design Tips. Additional Information including FAQs is available http://www.ti.com/lit/an/slva924/slva924.pdf Designing A Standalone Single Cell 3-A Charger with the bq25606.
The STAT and PG pins might not work normally if not following the design guidelines.
徐工,这种情况下REGN的电压是正常的,按理来说应该PG脚是拉低呀,什么原因引起的异常?
您好,PG 和STAT如果输出异常,这取决于引脚损坏是否影响充电电路。
将BQ25606用在只有电池管理的单板上能正常工作说明芯片没有损坏。建议您检查整个应用电路。
非常抱歉目前只有论坛支持。
您好, stat high 情况如下:
Charging termination (top off timer may be running)
Sleep mode, charge disable, boost mode
您好,请参考数据手册表 9-4. STAT Pin State 描述了stat high的请况。
开始充电的条件请参考9.3.5.1 Autonomous Charging Cycle
您好,I would highly recommend a single ceramic capacitor because of the critical placement and ESR requirement. I would recommend you chose a ceramic capacitor with a high voltage rating to get the required value at the operating point. For CIN, more capacitance is better.
Using a tantalum and a ceramic capacitor might work, but I would still recommend a reasonably large ceramic capacitor if you were to use a tantalum capacitor.