ML4821 Description
The ML4821 provides plete 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. The circuit includes a precision reference, gain modulator, average current error amplifier, output error amplifier, over-voltage protection parator, shutdown logic, as well as a high current output.
ML4821 Key Features
- Average current sensing for lowest possible harmonic distortion
- Average line pensation with brown-out control
- Precision buffered 5V reference
- 1A peak current totem-pole output drive
- Overvoltage parator eliminates output “runaway” due to load removal
- Wide mon mode range in current sense parators for better noise immunity
- Large oscillator amplitude for better noise immunity
- Output driver internally limited to 17V