Hi guyz howz all??? i want to control a dc motors speed and direction im using H bridge circuit for that based on B.J.T transistors. But im confused at one point the motors specifications show that its rated current in 500mA but as i change the speed with PWM the current will also change through the motor and i want to design a H bridge for that so what current should i choose for Ic saturation as i am confused that if the current will change through the motor the transistors will leave saturation and go into active mode and dissipiate more power and heat what is the solution for this please help me