TEA2016 LLC-Half-bridge failure

JuVen — Sat, 16 Nov 2024 06:12:03 GMT

Hi Sir：

I have a Li-ion battery charger project that uses the TEA2016 . It need to outputs 28V to 42V.

The scenarios that need to be applied are 28V to 41.5V constant 5A current .

when battery is 42V ,It need constant voltage.

At present, 42V constant voltage output, current 0A to 5A adjustable, the test is OK.

But, when the constant current 5A output and the voltage is adjusted from 28V to 41.5V, It happen a question LLC-GANMOS Half bridge damaged .

lower bridge and the half-bridge damaged.

I tested a report that the voltage can be output from 28V to 42V when the current loop is limited to a constant 2A output.

But, TEA2016 will automatically adjust the HP-LP mode, and the resonant current waveform and half-bridge voltage waveform in LP mode are confused.

At present, it is speculated that the 5A output in LP mode will disturb GANMOS-GS.（see pg1）

There is also a case where the current loop limits 5A constant current output, and when the load machine adjusts 7Ω in CR mode, the theoretical output voltage is at this moment: 5A*7Ω=35V. In reality, however, the TEA2016 chip stopped working. （see pg2）

See attachment for pictures of current loop 2A limitation（see pg3-pg6）

SCH see PDF,During the test, in order to avoid the instability of the operation amplifier power supply, 13V is an independent power supply

I have asked for the technical support of the agent, but there is no solution at present. I was hoping you could help.

Re: TEA2016 LLC-Half-bridge failure

guoweisun — Tue, 19 Nov 2024 10:04:50 GMT

Hi JuVen

我想问下您有没有用过附件的计算表格，假如没有的话我还是建议您先review一下原理图根据这个计算表格，调整下里面不一样的具体参数。

Thanks
BR

Re: TEA2016 LLC-Half-bridge failure

zjhzjhzjhzjh — Fri, 09 May 2025 01:57:27 GMT

您好，我在使用tea2016调试过程中也遇到与您类似的问题，请问您是否解决？可否提供帮助，谢谢！

Re: TEA2016 LLC-Half-bridge failure

JuVen — Mon, 12 May 2025 07:18:22 GMT

Hi
May I have a look at your schematic diagram and PCB layout.
At that time, my problem was caused by the feedback loop and the SNSCAP loop.

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TEA2016 LLC-Half-bridge failure

Re: TEA2016 LLC-Half-bridge failure

Re: TEA2016 LLC-Half-bridge failure

Re: TEA2016 LLC-Half-bridge failure