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https://e2e.ti.com/support/power-management-group/power-management/f/power-management-forum/918327/bq21040-charge-current
你(们)好，先生
我可以使用 BQ21040来提供0.7A 充电电流吗？
我看到 RθJA 是130.8 °C/W，如果输入电压为5V，Vbat 为3V
功率耗散为(5Vin - 3Vbat)*0.7A = 1.4W
TJ=25°C+1.4*130.8 =208.12°C
我认为208°C 太热了，我有任何误解
您好 Kaile、
您将需要使用结至电路板的表征参数、即45.5 C/W
这将得出温度 Tj = 25 C + 1.4W * 45.5 C/W = 88.7 C
最棒的
