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cross mob
jsyloving
Level 1
Level 1
5 replies posted 5 sign-ins First reply posted

7805739b581dd858db8c72a4cb6b444.png76b30a354f3dd04130d7022fc8df5b2.pnga1bdceff7c44432d5a5d5daa782c328.png55980688180e4b68222a89634d59ecd.png4182e03739d8e16d7cd59549192813a.pngThe DC-DC module that supplies power to the driver chip is normal, the IGBT module is F3L200R12W2H3_B11, and the driver chip selected is 1ED020I12-F2 , and the driver circuit is shown in the figure. When the upper voltage is 300v, 9 of the 12 driver chips are bad. After replacing the 9 new driver chip, power on, give the duty cycle, a single measurement of G1 and E1 output signal, (1) three of them only output is -8V, replace the regulator diode (such as: D7) can work normally. (2) but some no output, measured the driver chip's left and right side of the circuit found that the OUT output resistor is broken, some resistors shorted. After re-soldering found that the chip began to get hot, the newly soldered resistors began to blacken. (3) There is also an output of about 1-2V output. May I ask the technician what is the reason for the above three situations? Why -8V is the diode bad. And what is the reason for the hot chip? The hot chip driven by the tube is T2/T3, T6/T7. are the middle IGBT, this is not a bad IGBT, because my DC port voltage in 300v, the middle IGBT voltage withstand value is in 450v, T1/T4 in 1200V.

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1 解答
Rachel_G
Moderator
Moderator
Moderator
500 replies posted 50 likes received 250 solutions authored

Hello  

It is recommended that please do not submit the same question , please refer to the reply to the other question you asked:

https://community.infineon.com/t5/IGBT/%E9%A9%B1%E5%8A%A8%E8%8A%AF%E7%89%87%E5%8F%91%E7%83%AB%E4%B8%...

Thanks!

Best regards,

Rachel

在原帖中查看解决方案

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1 回复
Rachel_G
Moderator
Moderator
Moderator
500 replies posted 50 likes received 250 solutions authored

Hello  

It is recommended that please do not submit the same question , please refer to the reply to the other question you asked:

https://community.infineon.com/t5/IGBT/%E9%A9%B1%E5%8A%A8%E8%8A%AF%E7%89%87%E5%8F%91%E7%83%AB%E4%B8%...

Thanks!

Best regards,

Rachel

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