TIDA-010208: TIDA-010208; Protection ; MOS DSG

Ahmed MOSRATI

Prodigy 135 points

Part Number: TIDA-010208
Other Parts Discussed in Thread: BQ76952

Hi ,

-i have a question concerning this bloc (disharge protection) :

-whats the role of each component in circle below?

thanks in advance,

Best regards,

Ahmed.

over 1 year ago

0 Ryan Tan over 1 year ago

TI__Expert 3295 points

Ahmed,

The circuit is to speed up DSG MOSFET turn off timing and protect BQ76952 under minus PACK side voltage.

Ryan Tan

0 Ahmed MOSRATI over 1 year ago in reply to Ryan Tan

Prodigy 135 points

Hi Ryan Tan,

thanks for your reply,

another question:

-how to determine current to calculate the power dissipation in Res R130, R132, R133,?

-why chose 2 res (R132 & R133 ) in series 511OHM and not one Res 1K?

thanks,

Best Regards,

Ahmed.

+1 Yebohr Zhao over 1 year ago

TI__Prodigy 285 points

Hi Ahmed

How to choose the resistance value of R130 R132 and R133 depends on the requirements of your system for turn on MOSFET time. you can definitely use 1K resistor to replace it. at the same time, you can also refer to datasheet 7.25 High-side NFET Drivers, you can find different resistor correspond to different turn on time. there is a microampere level of current when driving, so the dissipation of R130 R132 and R133 is very small.

Best Regards

Yebohr zhao

0 Ahmed MOSRATI over 1 year ago in reply to Yebohr Zhao

Prodigy 135 points

Thanks Ryan Tan, & Yebohr Zhao

this resolved my issue

Best Regards,

Ahmed.

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TIDA-010208: TIDA-010208; Protection ; MOS DSG