Introduces the ML4824's features, including internally synchronized PFC and PWM, low total harmonic distortion, reduces ripple current in the storage capacitor between the PFC and PWM sections, average current, continuous boost leading edge PFC, voltage loop fast transconductance error amp, high efficiency trailing edge PWM can be configured for current mode or voltage mode operation, average line voltage compensation with brownout control, PFC overvoltage comparator eliminates output “runaway” due to load removal, current fed gain modulator for improved noise immunity, overvoltage protection, UVLO, and soft start
This document describes the Fairchild ML4824 Power Factor Correction (PFC) and PWM controller. It includes a feature list, functional description, and block diagrams that explain the integrated PFC and PWM operation, protection features, and gain modulation.
The datasheet contains detailed pin assignments, absolute maximum ratings, electrical characteristics, typical performance curves, mechanical dimensions, ordering information, and legal notices. It is intended for designers who need to select, integrate, and evaluate the ML4824 in switched‑mode power supplies.
| Package options | 16‑Pin PDIP (P16) and 16‑Pin Wide SOIC (S16W) |
|---|---|
| Peak PFC OUT current | 500 mA |
| Peak PWM OUT current | 500 mA |
| Junction temperature (max) | 150 °C |
| Maximum PWM frequency | 250 kHz |
The ML4824 is offered in a 16‑Pin PDIP (P16) and a 16‑Pin Wide SOIC (S16W) package.
The PWM section can operate at frequencies up to 250 kHz.