LM2623: Inductance Value

ikon

Genius 5355 points

Part Number: LM2623
Other Parts Discussed in Thread: TPS61088

Hi Support,

Vin: 2V

Vout: 12V

Iout: 500mA

For Inductor value, if our output voltage 12V(RF1=867K & RF2=100K), what is the good value of the Inductor?

As the datasheet mentioned smaller inductor good to reduce ripple and no any others calculation for Ind.

Thanks.

over 7 years ago

0 Jasper Li over 7 years ago

TI__Mastermind 46905 points

Hi iKon,

The input current in this application will reach 3~4A, so LM2623 can's support such high input current requirement. I would suggest TPS61088 if the minimum input voltage is higher than 2.7V. or using an additional TPS613222 to generate 5V for the VIN of the TPS61088

0 ikon over 7 years ago in reply to Jasper Li

Genius 5355 points

Hi Jasper,
The input is Ni-MH battery 2.4V, cut off voltage is 2V. If need output voltage 12V, what is the max output current Iout?
Thanks.

0 Jasper Li over 7 years ago in reply to ikon

TI__Mastermind 46905 points

Hi Ikon
it is 0.2A for the LM2623A, and lower for non-A version device

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LM2623: Inductance Value