ML4821
Overview
The ML4821 provides complete control for a “boost” type power factor correction system using the average current sensing method. Special care has been taken in the design of the ML4821 to increase system noise immunity.
- Average current sensing for lowest possible harmonic distortion
- Average line compensation with brown-out control
- Precision buffered 5V reference
- 1A peak current totem-pole output drive
- Overvoltage comparator eliminates output “runaway” due to load removal
- Wide common mode range in current sense comparators for better noise immunity
- Large oscillator amplitude for better noise immunity
- Output driver internally limited to 17V
- “Sleep mode” shutdown input
