TECHNICAL DATA

External Components Reliable and Flexible SMPS Controller

IL44608N

DESCRIPTION

The IL44608N is a high performance voltage mode controller designed

for off–line converters. This high voltage circuit that integrates the start–up

current source and the oscillator capacitor, requires few external components

while offering a high flexibility and reliability.

The device also features a very high efficiency stand–by management

consisting of an effective Pulsed Mode operation. This technique enables the

reduction of the stand–by power consumption to approximately 1.0 W while

delivering 300 mW in a 150 W SMPS.

● Integrated Start–Up Current Source

● Lossless Off–Line Start–Up

● Direct Off–Line Operation

● Fast Start–Up

General Features

● Flexibility

● Duty Cycle Control

● Under-voltage Lockout with Hysteresis

● On Chip Oscillator Switching Frequency 40, 75, or 100 kHz

● Secondary Control with Few External Components

Protections

● Maximum Duty Cycle Limitation

● Cycle by Cycle Current Limitation

● Demagnetization (Zero Current Detection) Protection

● “Over VCC Protection” Against Open Loop

● Programmable Low Inertia Over Voltage Protection against Open Loop

● Internal Thermal Protection

SMPS Controller

● Pulsed Mode Techniques for a Very High Efficiency Low Power Mode

● Lossless Startup

● Low dV/dT for Low EMI Radiations

Ordering Information

Device

Switching Frequency

Package

IL44608N40

40 kHz

Plastic

DIP–8

IL44608N75

75 kHz

Plastic

DIP–8

IL44608N100

100 kHz

Plastic

DIP–8

Pin Connection

PACKAGE

PDIP-8

1