准备做一个升压电路,要求有过流保护功能,请推荐个过流保护芯片,谢谢
输出电压:40V
输出电流:0.5A
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Hi
升压芯片自身都是自带过流保护的。
例如同步升压芯片TPS43060: http://www.ti.com/lit/ds/symlink/tps43060.pdf
The TPS4306x provides cycle-by-cycle current limit protection that turns off the low-side MOSFET when the inductor current reaches the current limit threshold. The cycle-by-cycle current limit circuitry is reset at the beginning of the next switching cycle. During an overcurrent event, the output voltage begins to droop as a function of the load on the outpu
Hi
内置MOS,电流限制都是不可调的,也就是说很可能到达1A以上才能过流保护。
如果要准确的0.5A左右保护,又是内置MOS,可能没有合适的。