Could someone suggest a voltage mode PWM, preferably able to source/sink up to 12V, 0.5amps, which outputs a duty cycle from 0 to > 90%, in a DIP package. It doesn't need to have very high frequency (actually I would prefere to use relatively low frequency, ~1KHz).
You can try DigiKey parametric search ("voltage mode pwm"). There are some chips that give greater than 90% duty cycle. The TL594 is apparently limited to 90% (45% each output). John