Other Parts Discussed in Thread: UCC27524
Tool/software:
Dear Experts,
We encountered some issues while using BQ76952+UCC27524 to control the low side charge and discharge NMOS. We hope you can help us find the cause
1. When the MCU sends a command to turn off the charging MOS separately, the discharging MOS will also be turned off for a period of time, ranging from approximately 10ms to 200ms, before the discharging MOS returns to conduction; Similarly, when the discharge MOS is turned off separately, the charging MOS is also turned off for a period of time. What may be the reason for this
2. When discharging, adjust the resistance of the MOS gate level control current limiting resistor (R145), and control the MOS turn off time to around 100us. When the discharge current is high (around 200A), the MCU sends a command to turn off the discharge MOS, which may result in repeated turn off. In the case of high current, the first level discharge overcurrent alarm will not occur, and the discharge MOS will also repeatedly turn off
