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TPS61196: Could you tell me about TPS61196's specification value of electrical characteristic?

Part Number: TPS61196

Hi, team.

I have a question about TPS61196's specification value of electrical characteristic.

Could you tell me?

The recommended VOUT range of this device is VIN (MIN) to 120 V (MAX).

Is this 120 V decided by the boost ratio that comes from the minimum on time and the duty cycle?

<The question from the customer is this>

Although it is thought the rated voltage value of the IC is not related ( think from the peripheral circuit ),

How is the maximum value of the boost voltage decideed?

Best regards,

Masumi Sekiguchi

  • Hi Masumi,
    Consider the input voltage and max duty cycle, the output voltage could be even higher. However, consider the LED load off periode, usually we recommand to connect a 10M ohm resistor from IFBx to gnd as application circuit, the leakage current will make the LED light, the higher the output voltage, the leakage current is higher. So 120V is recommended so that we believe no leakage current will light up LED during off time.
  • Thank you for reply.

    In other words, considering only the step-up ratio of this IC, even higher voltages are available.

    But considering leakage current at LED OFF, it became 120V.

    Is my understanding correct ?

  • Hi Masumim

    Your  understanding is correct.