trouble with TPS40210 volatge booster

[sonu_srini]

hi,
i have designed a voltage booster in TI web bench using TPS40210(see attachment) where i am boosting input voltage from 10-34v to 48v and its working but i need to use this 48v to feed into transformer circuit (see attachment ) but when i connect transformer section to voltage booster circuit output voltage of booster circuit gets reduce to 20v. please help me out to get out of this problem.



Thanks.

 

[crutschow]

What is the PING signal driving the transformer?

 

[manju_gowda]

Ping is the control pulses from microcontroller. and there is issue with those signal i checked by connecting external source to it.

 

[manju_gowda]

The problem is voltage booster that i designed using TI web bench is designed for output capacitance of 150uF but i need to use 8350uF in place of it.when i tries to do so output voltage stabilizes to input voltage.

 

[crutschow]

The problem is voltage booster that i designed using TI web bench is designed for output capacitance of 150uF but i need to use 8350uF in place of it.when i tries to do so output voltage stabilizes to input voltage.

Why do you need to use the odd value of 8350μF?