Dear
I am designing a charging circuit for 24V/4Ah lead acid battery. In my design, there is no ACFET. But there is also UV/OV voltage divider resistors.
I have known, even though there is no ACFET, BQ25751 can also close the buck-boost charging circuit. Bu I test my circuit, the UV thershold is 25V, but when the input voltage is 27.5V, the charging circuit is closed.
In my design, the input power typical value is 30V, charging float voltage output is 26.4V. Max charging current is 1A.
Could you please help explain, what is the actual UV/OV protection threshold for buck-boost charging circuit?
Thanks.
Best regards
Sunny
