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在上图电路中，出现失效时，使用芯片TPS2553与TPS2553-1有什么区别？
TPS255x parts enter constant current mode during current limit condition; TPS255x-1 parts latch off。
另外，在datasheet 9.3.1 Overcurrent Conditions部分也有详细介绍二者区别。
www.ti.com/.../tps2553.pdf
