(China (Mainland))
Product Summary
The ml4813is is a PWM controller designed for use in a discontinuous flyback or buck-boost type power factor correction (PFC) system for low power, low cost applications. The ml4813is includes a precision reference, oscillator, error amplifier, over-voltage comparator, over-current comparator, and an extra op-amp as well as a high current output. In a typical application, the ml4813is functions as a voltage mode regulator.
Parametrics
ml4813is absolute maximum ratings: (1) Supply Current: 40mA; (2) OUT Current: ±1A; (3) OUT Energy (capacitive load, per cycle) : 5μJ; (4) COMP Sink Current: 10mA; (5) CT Charging Current: 5mA; (6) Analog Input Voltage (pins 1, 3-8) : GND - 0.3V to 5.5V; (7) Junction Temperature: 150°C; (8) Storage Temperature Range: -65 to 150°C; (9) Lead Temperature (Soldering, 10 sec) :260°C; (10) Thermal Resistance (θJA) : 88°C/W (PDIP) , 105°C/W (SOIC) .
Features
ml4813is features: (1) Precision buffered 5V reference; (2) Extra op-amp for output voltage instrumentation amplifier; (3) Overcurrent comparator for switch protection; (4) Soft start and under-voltage lockout for easy low surge off-line starting; (5) 1A peak current Totem-pole output drive; (6) Overvoltage comparator eliminates output runaway due to load removal; (7) Large oscillator amplitude for better noise immunity.
Diagrams
