Question Mosfet Driver

Discussion in 'General Electronics Chat' started by WillieW, Mar 17, 2009.

  1. WillieW

    Thread Starter New Member

    Mar 17, 2009

    I've been using the Mosfet driver TC4427A ( to drive a Lego 9V mini motor (Lego 43362) based on PWM. I-max here is 350 mA, so that shouldn't be a problem. PWM driving signal is generated by an Atmel Atmega, about 3kHz. All went quite well for a minute or so, then smoke :eek: started coming out of the TC4427A. The Vdd of the TC4427A was powered directly by a 9v DC (unstabilized) wall wart, without extra capacitors, maybe switching the TC on and of 100x per second ... could that be the problem ? So I need a 9V voltage regulator with some capacitors ? Any suggestions ?
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    A circuit diagram would be most helpful in trying to understand the cause of the failure.