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Original question:

TPS61197: TPS61197

TPS61197: TPS61197 successor

Kami Huang60
Genius 3830 points
Part Number: TPS61197
Other Parts Discussed in Thread: TPS92692, TPS61196

Dear Sir/Ms.

Since TPS61197 is already NRND, my customers are looking for new solutions.
The current specification is
Vin =12V and 36V. (12V for IC Vcc) 36V for Power stage input.
A string of LED output = 72Vout (18S) / Iout 0.28A,
Output OVP and Fault fuction is needed.
The customer will use a total of four TPS61197.
Just use Digital Dimming.
Now in addition to ours, we are looking for O2's 9998H.

I have seen the specifications of TPS92692 and TPS62691 but the output voltage does not seem to meet the customer's specifications.
Can you give me some advice?

Best Regards,

Kami Huang

  • 0
    TI__Mastermind 22745 points

    Hi Kami,

        TPS61196 is a good solution, you can check whether this can meet your customer's requirement.

    Regards

    Sean

  • 0 in reply to Sean Zhou
    Genius 3830 points

    Hello Sean,

    We just discuss with customer RD. 

    The customer mentioned a few questions.
    Customers mentioned that they used a single-layer board on the TPS61197. Ask how the heat dissipation of the TPS61196 is handled. Do you have customers using the TPS61196 single-layer board? Is the heat dissipation normal?
    Another problem is
    The specification mentions 200-mA Continuous Output, which is 240mA for this customer. It seems that parallel is required. If I connect LEDs 1~3 in parallel, how do IFB1~IFB3 connect? How do I calculate the current feedback resistor?

    Best Regards,

    Kami Huang

  • 0 in reply to Kami Huang60
    TI__Mastermind 22745 points

    Hi Kami,

        I don't have the thermal data for single -layer board application. For thermal performance, you maye need to test on real board.

        For 240mA, you need just connect IFB1,  IFB2 and IFB3 pins together. And set each channel to 80mA. Use the 80mA as the target current value to calcule the current feedback resistor.

    Regards

    Sean