TPS2662: load issue

Gary Teng

Genius 5530 points

Part Number: TPS2662

Hi Sir,

if the output is loaded first, the output will not turn on,

but if turn on the TPS2662 first, and then turn on the load, the output can be work.

1. VDET_P1 has been disconnect,

2. C9 output cap modify 1uF and remove C5.

3. dVdT modify 22nF

we want know why TPS2662 can not be started after mounting the load first? is there any problem on schematic?

0 Rakesh over 1 year ago

Hi Gary,

Schematic looks good.

What is the load ?

Can you check whether eFuse is going into current limit with load at startup? please share Vin , Vout, input current test waveform during start-up

Best Regards,

Rakesh

0 Gary Teng over 1 year ago in reply to Rakesh

Genius 5530 points

Hi Rakesh,

1. What is the load ? 40v~54v/ 0.6A, total need 24w~32.5w.

2. Vin , Vout, input current test waveform during start-up==> ok~ please wait for us.

0 Rakesh over 1 year ago in reply to Gary Teng

Hi Gary,

Please use resistive load or e-load in CR mode for evaluation

Best Regards,

Rakesh

Power management forum