I have a 8S4P LiFePO4 pack being controlled by the ISL94202 but our BMS board doesn’t use a MCU so it’s dependent on the 94202 chip. Currently we have a LED controlled by the /SD line. If there’s an error the LED lights and let’s the end user know something is wrong.
The issue is why does the /SD line go active when the unit goes into SLEEP mode? We need the chip go go into a low current state to keep the battery from going low when the unit isn’t being used. But since the /SD line is active during SLEEP mode we can’t use that to control the error LED.
Is there any way to be able to indicate to the end user that an error has occurred but not during SLEEP mode?