UC3842: UC3842

Sadik Cinik

Prodigy 30 points

Part Number: UC3842
Other Parts Discussed in Thread: UC2825

Hi,

Is there any current mode controller that supports up to 600V input voltage and external reference set?

Thanks,

over 3 years ago

0 Steven Mappus1 over 3 years ago

TI__Mastermind 27555 points

Sadik,

All TI general purpose PWM controllers can support 600-V start-up and higher. The AC/DC PWM controllers with integrated high-voltage start-up have a VIN limit given in the data sheet but general purpose PWM controllers can start-up from any line voltage as long as the start-up resistors between the high-voltage input and VCC are sized correctly.

Regards,

Steve M

0 Sadik Cinik over 3 years ago in reply to Steven Mappus1

Prodigy 30 points

Hi Steve,

Thanks for the reply. I was confused with the max VCC rating (30V) specified in the datasheet.

My second question is about setting the non-inverting input pin of the error amplifier externally. Is there any current mode controller with this feature?

0 Steven Mappus1 over 3 years ago in reply to Sadik Cinik

TI__Mastermind 27555 points

Sadik,

UC2825 is one example where we allow access to all three pins of the voltage error amp. However, this is for a double-ended PWM controller.

Steve M

Power management

Power management forum

UC3842: UC3842