ADP8140 Vin range

Hi

I have a question about ADP8140 Vin range.

If VIN is 5V and VOUT is 16V (sink is a few voltage),

Are there any caution?

Because some characteristics is over 5.7V (channel ovp),

Nearest case is Figure 35 (and external 5V input to VIN)

Best regards 

Thank you very much

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  • 0
    •  Analog Employees 
    on Jan 17, 2019 6:23 AM

    Hi m-kun,

    The ADP8140 should always control the power stage, in Figure 35 the ADP8140 controls the boost power stage via ADP1612's FB pin from its own COMP pin. This means that you shouldn't hit the OVP fault since the ADP8140 will adjust the output of ADP1612 to the drop on your LEDs plus a small headroom.

    Regards,
    Doc

Reply
  • 0
    •  Analog Employees 
    on Jan 17, 2019 6:23 AM

    Hi m-kun,

    The ADP8140 should always control the power stage, in Figure 35 the ADP8140 controls the boost power stage via ADP1612's FB pin from its own COMP pin. This means that you shouldn't hit the OVP fault since the ADP8140 will adjust the output of ADP1612 to the drop on your LEDs plus a small headroom.

    Regards,
    Doc

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