Part Number:BQ76952
您好,
我自製的電路板,使用BQ7695202 ,目前測試FW中,測試有關電流保護部分,設定放電短路保護電流30A,當發生短路時,Safety Status A中的SCD被設定為1,此時系統自動關閉DSG,
停止輸出,但當我解除短路時,測得電流已經低於短路保護值,但Safety Status A中的SCD旗標仍然為1,無法清除,以致DSG無法動作,無法放電。
當 BQ769x2_SetRegister(EnabledProtectionsA, 0XBC, 1); 改為BQ769x2_SetRegister(EnabledProtectionsA, 0X3C, 1);時,關閉短路保護機制,DSG才能動作,但系統如果啟動短路保護,
SCD旗標仍然為1,關閉放電輸出。
因此,系統沒辦法正常運作,請問當保護機制被觸發後,Safety Status A、Safety Status B、Safety Status C中的故障旗標被設定為1後,如何排除故障旗號
謝謝!
Star Xu:
您好,请参考下面内容:
you can set the device to recover solely with a charge current. You will have to enable SCDL (Settings:Protection:Enabled Protections C:[SCDL]) and set SCDL limit (Protections:SCDL:Latch Limit) to 1, so that it triggers after a single SCD event. Then you can configure the device to recover with a charging current.
How to configure it to recover with a charging current is described in the last paragraph of Section 5.2.6 Short Circuit in Discharge Protection in the Technical Reference Manual.