TIDA-01385: startup

Intellectual 925 points

Replies: 3

Views: 40

Part Number: TIDA-01385

Hello,

the Startup of the circuit at low CT output current (e.g. 50mA) is not successful. Below is the waveforms of TL431, the 1mF capacitor voltage and the boost output voltage (set point at 3.3V). as can be seen TL431 has not reached its 2.5V expected output.

However, It works well for high currents like 1A.

I tied to leave the simulation for a longer time but I get the following result:

The sy

Is there some way to overcome this problem please?

Regards,

Amr

3 Replies