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CV / CC mode is applicable IC

KIM Andy
Expert 2530 points
Other Parts Discussed in Thread: TL103W

Is there a "TI" DC / DC IC with the following specifications?

1. CV / CC circuit configuration, VOUT = 300V, IOUT = 1A (MAX)

2. Operates in two current modes during operation via external signals.

     - Iout = 300mA, 1A

     - External signal: PWM, DUTY, 2 ~ 4V external voltage input

We are currently applying Onsemi's NCP4328 IC.

The NCP4328 can not change the current during operation.

So I want to review it as a TI product.

NCP4328(DATASHEET) : LINK

Thank you.

  • 0
    TI__Genius 9130 points
    KIM

    You could consider the TL103W. This is somewhat similar to the OnSemi device, it has 2 op-amps and can be configured to operate in CV/CC mode as shown on page 3 of the datasheet. But it is more generic and flexible, since the CC-mode reference can be externally supplied.

    The reference for the CC-mode section can be derived from the REF of the CV-mode opamp with an external divider to set the desired reference voltage level. An additional circuit could be added to this to allow an external signal to adjust the CC mode reference level by adding a switched pull-down resistor to give 2 different reference levels for the CC-mode section.

    I hope this helps to answer your question.

    Thanks,
    Bernard
  • 0 in reply to Bernard Keogh
    Expert 2530 points
    Hello

    Thank you so much for your reply.

    "An additional circuit could be added to an external signal to adjust the CC mode reference level by adding a switched pull-down resistor to give 2 different reference levels for the CC-mode section."

    Could you explain this answer with a schematic or a picture?
  • 0 in reply to KIM Andy
    TI__Genius 9130 points

    Kim,

    See attached example. Using the typical application diagram of TL103W, resistors R3, R4 set the reference level for the CC loop (divided down from the internal VREF). By adding R3A and NFET, the CC-loop reference level can be decreased when NFET is on, connecting R3A in parallel with R3.

    Thanks,

    Bernard

  • 0 in reply to Bernard Keogh
    Expert 2530 points
    Hello.

    Thank you very much to the quick response.

    Thanks a lot to help.