Hi,
I am designing a boost convertor using LT3757A for an output of 180V, 100mA from an input of 24V. I have simulated the circuit successfully using LT spice and got the required output. But when testing in the real time I am not getting the required voltage of 180V, whereas only 100V. I could also see that no input current was drawn by the system at the time of tesing.
Problems encountered during real time testing
1) Low output Voltage of 100V instead of 180V.
2) Output is dropped to 30V when a load of 1.8K is connected.
Components used at the real time testing
1)Inductor- API Delevan( 4590R-224K) 220uH fixed inductor
2) Mosfet- (IRLI640GPBF) Vishay Semiconductors 200V VDS, 1V Vth
3) Diode- (SR320 R0G) 200V Vrrm 3A
4) Current sense resistor- .09 ohms.
5) output capacitor (A759KS475M2EAAE496) KEMET 4.7uF.
I am designing a boost convertor using LT3757A for an output of 180V, 100mA from an input of 24V. I have simulated the circuit successfully using LT spice and got the required output. But when testing in the real time I am not getting the required voltage of 180V, whereas only 100V. I could also see that no input current was drawn by the system at the time of tesing.
Problems encountered during real time testing
1) Low output Voltage of 100V instead of 180V.
2) Output is dropped to 30V when a load of 1.8K is connected.
Components used at the real time testing
1)Inductor- API Delevan( 4590R-224K) 220uH fixed inductor
2) Mosfet- (IRLI640GPBF) Vishay Semiconductors 200V VDS, 1V Vth
3) Diode- (SR320 R0G) 200V Vrrm 3A
4) Current sense resistor- .09 ohms.
5) output capacitor (A759KS475M2EAAE496) KEMET 4.7uF.