need help ir2110

Discussion in 'The Projects Forum' started by almotaz, Jun 16, 2015.

  1. almotaz

    Thread Starter New Member

    Jun 13, 2015
    2
    0
    i try to make bipolar stepper motor driver i make two h bridge with ir 2110 motor supply volt 48 V motor work with no load and low speed and very low torque and mosfet heat up fast i try work at 31 Khz and try change it to 15 Khz and same problem change bootstrap capacitor from 4.7 mF to 22 mF and 47 mF and same problem i use circuit like :
    use mosfet = IRFP064
    D1 ,D4 =BY399
    D2,D3,D5,D6 = 1N4148
    R3 ,R4 ,R7 ,R8 =1 K ohm
    R1 , R2 ,R5 ,R6 = 10 ohm and try change to 33 ohm
    C2 , C6 =100nf
    C1 , C5 =4.7 mf change 22 mf change 47mf
    Vcc 12V
    Vdd 5V
    PWM 5V
    [​IMG]
     
  2. john*michael

    Member

    Sep 18, 2014
    43
    5
    Try taking out R3 and R7 (or greatly increasing the value, maybe 100K). The high side driver bootstrap is having to provide 12 volts / 1000 ohms or 12 ma. at low frequency, the gate voltage might be drooping on the high side.
     
  3. almotaz

    Thread Starter New Member

    Jun 13, 2015
    2
    0
    i will try
     
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