CSD18543Q3A: Thermal information

Pranjali Andhare

Prodigy 165 points

Part Number: CSD18543Q3A
Other Parts Discussed in Thread: DRV8161

Can you please help us with RthJA value for below PCB conditions: yellow highlighted on priority
- 1oz, 2 layer
- 1oz, 4 layer
- 2oz, 2 layer
- 2oz, 4 layer

2 months ago

0 John Wallace1 2 months ago

TI__Mastermind 40620 points

Hello Pranjali,

Thanks for your interest in TI FETs. TI only provides RθJA values at the conditions specified in the datasheet. There is no data for other PCB stackup and copper weights. Please remind me, what is the application and requirements? How much power is being dissipated in the FET?

Best Regards,

John Wallace

TI FET Applications

0 Pranjali Andhare 2 months ago in reply to John Wallace1

Prodigy 165 points

Hello John, we are using this mosfet with half bridge driver DRV8161

Application: Genset controller (HMI)
Continuous load current (RMS): 6A @24V battery system
Operating temperature: -40°C to +85°C
Operating voltage: 9V to 32V

0 John Wallace1 2 months ago in reply to Pranjali Andhare

TI__Mastermind 40620 points

Hello Pranjali,

Thanks for the update. The conduction loss in the FETs is dominant at the very low PWM frequency of 1.2kHz. The calculated conduction loss in each FET at 6A rms is about 0.5W which is within the capability (~2.5W max) of the 3.3x3.3mm SON package. Please let me know if I can be of further assistance.

Thanks,

John

0 John Wallace1 2 months ago in reply to John Wallace1

TI__Mastermind 40620 points

Hello Pranjali,

Thanks again for your interest in TI FETs. Please let me know if your issue has been resolved so I can close this thread.

Thanks,

John

0 John Wallace1 1 month ago in reply to John Wallace1

TI__Mastermind 40620 points

Hi Pranjali,

Thanks again. Since I have not received a response, I assume your issue is resolved and will close this thread.

Best Regards,

John

Power management

Power management forum

CSD18543Q3A: Thermal information