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Problem regarding Mosfet Driver IC LTC7004

Dear Sir /Mam

                         There is one issue regarding LTC Mosfet driver IC 7004. IC is working fine with input from SMPS of about 28 Volts 8 amps , But as soon as we connect Battery input of about 24 Volts , IC gets damged , I am using IC7004 as high side application driver in my application to switch 28 volts from smps or battery output of about 24 Volts. Also I am not violating the pin voltage rating of INP and VCC of the IC both are in safe margin of about 7 Volts and 12 Volts Respectively. Also I had checked the current rating of INP pin when driver IC is on it is about 11 ampere. Reply as early as possible If required I could also share the circuit schematic.

Warm Regards

Sujay Kulkarni

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  • Hi

    I have added explanation to the recommendations that I made in previous post.  See below.

    2. Add catch diode close to TS pin to GND.  See explanation below.

    3. D5, use BAS116.  See explanation below.

    4. C28, Use 1uF, 50V ceramic capacitor.  Capacitor C28 is used to charge C6 via diode D5.  Therefore, the capacitor value at C28 should be larger than the value at C6 by at least 5 to 10 times.  The recommended value is about 5 times higher than the value at C6.

Reply
  • Hi

    I have added explanation to the recommendations that I made in previous post.  See below.

    2. Add catch diode close to TS pin to GND.  See explanation below.

    3. D5, use BAS116.  See explanation below.

    4. C28, Use 1uF, 50V ceramic capacitor.  Capacitor C28 is used to charge C6 via diode D5.  Therefore, the capacitor value at C28 should be larger than the value at C6 by at least 5 to 10 times.  The recommended value is about 5 times higher than the value at C6.

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