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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/1559262/bq24702-u4-function
工具/软件：
您好的团队、
U4 的功能是什么？
您好、Enhui、
U4 是 Batfet、在不存在有效适配器时将电池连接到系统。
二极管未连接、但有助于保护 BATFET 栅极免受电过应力的影响。
此致、
基督教。
