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TL1454A: Dual boost application

KIM Andy
Expert 2530 points
Part Number: TL1454A
Other Parts Discussed in Thread: LM5155

Hi

My customer applied the TL1454A and configured it for the following specifications.
Input: 7.4 ~ 8.4v
Output 1: 24V
Output 2: 5V

In the new version of the circuit configuration, you want to configure the output 2 to be BOOST Type at 12V.
On TL1454A Datasheet, output2 is configured as a buck.
Do you have any recommended parts?

  • 0
    TI__Guru 68675 points
    Hi Kim,

    Thank you for considering the TL1454A. Sorry, OUTPUT2 is configured to drive a high side PFET which is in the buck configuration. If you want to use it for boost, the OUTPUT2 logic needs to be inverted as the PWM signal for low side FET, and you need external driver to drive the MOSFET.

    I would recommend you use use a separate boost controller like the LM5155 to implement the boost function. The LM5155 is our latest boost device. Please take a look at TI.com.

    Thanks,
    Youhao Xi, Applications Engineering