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技术支持

Other Parts Discussed in Thread: UC3845

 您好!想借鉴网络向您咨询一个有关技术方面的问题。 附件是一份电源驱动电路,驱动芯片为UC3845,请查看。问题点;当成品正常工作在15W有效功率时,从几分钟到十几分钟后,驱动芯片无输出,被保护,测量壳内温度30-100度。不现良率占30%。紧急情况,还请帮忙一起分析下。谢谢!