Post Go back to editing

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

Parents
  • Hi

    My suggestion would be to monitor VCC pin to GND and BST pin to TS pin with a 10 MEG input impedance digital multimeter.  Typical BST to TS voltage should be around 12V.

    The LTC7004 should work as long as BST pin to TS pin voltage is maintained at around 12V.  If not, check for leakage current from BST pin to other nodes in the circuit.  Check and clear solder flux residue around the circuit.

    I would recommend putting a Schottky diode close to TS pin to GND especially the load includes long length cable. mobdro app


Reply
  • Hi

    My suggestion would be to monitor VCC pin to GND and BST pin to TS pin with a 10 MEG input impedance digital multimeter.  Typical BST to TS voltage should be around 12V.

    The LTC7004 should work as long as BST pin to TS pin voltage is maintained at around 12V.  If not, check for leakage current from BST pin to other nodes in the circuit.  Check and clear solder flux residue around the circuit.

    I would recommend putting a Schottky diode close to TS pin to GND especially the load includes long length cable. mobdro app


Children
No Data