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LM2622: LM2622 design check

Rence
Prodigy 180 points
Part Number: LM2622

Dear TI :

We have one design using LM2622. The power level is boosted to 8V from 3.8V using battery.

1. Use 1.25 MHz applications, L = 4.7uF_1.9A

2. RFB1 = 75KOhm, RFB2 = 10KOhm

3. Rc = 56KOhm, Cc =2.2nF

Please provide your suggestion.

Thanks

  • +1
    TI__Genius 10060 points

    Hi Rence,

    Here are my comment for your reference:

    1. In the schematic, there is no output capacitor, 22uF Cout is recommended;
    2. The ratio of RFB1/RFB2 is not correct for a 8V Vout. You may use RFB1 = 160kOhm, RFB2 = 30kOhm;
    3. More conveniently, you may refer to the schematic in the datasheet:

    Regards

    Lei