TPS1H200A-Q1: how to calculate the norminal DC current ?

Hi User,

This DC current is based on the thermals of the part. We specify the nominal DC load of this device based on JEDEC 2s2p standard board to avoid hitting thermal shutdown.

There is no dedicated formula but you can use the power formula as:

P_dissipated = (Tj - Ta)/ R_t,j,a

where Power is also I^2 * R_on

Thanks,

Shreyas

Hi User,

The R,t,j,a specification is provided in the datasheet along with a graph that shows Ron variation with temperature.

Back calculating the value shows this DC current is at 70C ambient.

The Ron in this situation is roughly 0.27Ohm and the maximum Tj is taken as 150C as this is the largest recommended temperature for the junction.

Thanks,

Shreyas

Hi User,

This device can be used at higher temperatures and can push larger currents but it depends on the thermal sinking capabilities of the board. Please note that our thermals are based of JEDEC 2s2p.

Thanks,

Shreyas