Dear experts, I use the TPS70930 to drive LED. The input voltage of TPS70930 is 24V and output voltage of TPS70930 is 3V. The package of TPS70930 is SOT23-5(5 Pin). Contiune output currenr is less than 20mA.
What is the continuous Max.power dissipation that TPS70930 can wistand? I calculate the max. power is about (24V-3V)*20mA=0.42W. Will it will damage the TPS70930? Regards.
Dear Stephen, if I change the package from SOT-23 to WSON, will it will be helpful to the life of TPS709? Then, please refer to below figure, the two circule in the red retangle are GND VIA? If they are GND VIA, can I add more VIAs to improve the heat dissicipation? Thanks.
Hi Jason,
Yes the WSON package will be a better choice and we would recommend placing as many thermal vias from the ground pad to a ground plane as you can fit. 2 vias are shown here but if the fabrication house you will be using can fit 3 or more vias, that will offer you better thermal management and improved MTBF. Additionally you can extend the ground copper on the same layer as the components are placed and add thermal vias from the surface copper as well.
Thanks,
- Stephen
