(Hong Kong)
Product Summary
The ML4819CP is a complete boost mode Power factor Controller (PFC) which also contains a PWM controller. The PFC circuit is similar to the ML4812 while the PWM controller can be used for current or voltage mode control for a second stage converter. Since the PWM and PFC circuits share the same oscillator, synchronization of the two stages is inherent. The outputs of the ML4819CP provide high current (>1A peak) and high slew rate to quickly charge and discharge MOSFET gates.
Parametrics
ML4819CP absolute maximum ratings: (1)Supply Voltage (VCC): 35V; (2)Output Current, Source or Sink (RAMP COMP) DC: 1.0A; (3)Output Energy (capacitive load per cycle): 5μJ; (4)Multiplier ISINE Input (ISINE): 1.2mA; (5)Error Amp Sink Current (GM OUT): 10mA; (6)Oscillator Charge Current: 2mA.
Features
ML4819CP features: (1)Two 1A peak current totem-pole output drivers; (2)Precision buffered 5V reference (±1%); (3)Large oscillator amplitude for better noise immunity; (4)Precision duty cycle limit for PWM section; (5)Current input gain modulator improves noise immunit; (6)Programmable Ramp Compensation circuit; (7)Over-Voltage comparator helps prevent output “runaway”; (8)Wide common mode range in current sense compensators for better noise immunity; (9)Under-Voltage Lockout circuit with 6V hysteresis.
Diagrams
