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Original question:

UC3842: UC3842

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, 

  • 0
    TI__Mastermind 29805 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 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 in reply to Sadik Cinik
    TI__Mastermind 29805 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