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User20724
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ipw90r340c3用于dcdc全桥电路上,全桥拓扑的输入电压500v左右,

一个产品用4个ipw90r340c3,分别为q0500,q0501,q0502,q0503。

s101和s103引脚接变压器的主边,变压器的副边接同步整流电路输出24v,变压器匝数比为12:1

损坏的时候一般是在满载工作时损坏,器件损坏时测试ds级短路。
且该器件损坏时都是上桥两个器件(q0500,q0502)同时损坏,
器件损坏之后只更换对应两个器件,再测试,能正常带满载,
且持续长时间测试也不再出现损坏,
测量器件峰值电压和电流都是正常的,所以无法抓到损坏瞬间的电压电流情况。

请协助分析下异常原因?电路方面设计是否合理?以及改善措施?
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User20724
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ipw90r340c3 应用电路中,输入电压500v ,选型是否合理?
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ciji_4336356
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您好,请问您是否可以用英语重复下您的问题,谢谢。
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User20724
Level 1
First question asked First reply posted
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IPW90R340C3 the devices used in DCDC full bridge circuit, full bridge topology circuit,

Input voltage 500 v,
A product with 4 IPW90R340C3, location is Q0500 Q0501, Q0502, Q0503

(bridge circuit on Q0500 Q0502) often is damaged, defective rate 1%。
(Q0500 Q0502) to replace two new devices, test, load can work normally.

And test for a relatively long time also no longer appear damaged, measuring device peak voltage and current are normal。





What reason? How to improve?
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User20724
Level 1
First question asked First reply posted
Level 1
circlejhx wrote:
您好,请问您是否可以用英语重复下您的问题,谢谢。


IPW90R340C3 the devices used in DCDC full bridge circuit, full bridge topology circuit,

Input voltage 500 v,
A product with 4 IPW90R340C3, location is Q0500 Q0501, Q0502, Q0503

(bridge circuit on Q0500 Q0502) often is damaged, defective rate 1%。
(Q0500 Q0502) to replace two new devices, test, load can work normally.

And test for a relatively long time also no longer appear damaged, measuring device peak voltage and current are normal。





What reason? How to improve?
0 Likes