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LM5175: BUCK BOOST CONVERTER

Prodigy 210 points

Replies: 3

Views: 217

Part Number: LM5175

Dear Sir,

Is there any IC similar to LM5175 where I can control the output voltage from external PWM signal through micro-controller (MSP) . I want to driver 4 MOSFET switches for synchronous buck boost converter.

Ratings are as follows :

Vout - 10 to 30 V

Vin - 5 to 60 V

Iout - 20A

max switching frequency - 100Khz

  • Hi Hitesh,

    Based on the power level of the design I recommend using the LM5176. This is the next generation device after the LM5175.

    For any controller with external feedback resistor, the output voltage can be changed by sourcing or sinking current into the FB node. This can be done with a VID control such as the LM10011 or with an external filter and PWM signal as shown below.

    Let me know if you have any questions

    Thanks,

    Garrett

  • In reply to Garrett Roecker:

    As I described my application needs operating voltage of 60 V, ICLM5176 has maximum voltage rating of 60V, can u suggest any other IC which is having operating voltage of 60V which can aslo withstand voltage above 60V.
  • In reply to Garrett Roecker:

    Dear Sir,
    How can I use this IC in constant current mode, and that constant current should be controllable ?

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