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MC44608P100G

Few External Components Reliable and Flexible SMPS Controller

ON Semiconductor 

MC44608

Few External Components

Reliable and Flexible

SMPS Controller

The MC44608 is a high performance voltage mode controller

designed for off--line converters. This high voltage circuit that

integrates the startup 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 standby management

consisting of an effective Pulsed Mode operation. This technique

enables the reduction of the standby power consumption to

approximately 1.0 W while delivering 300 mW in a 150 W SMPS.

General Features

 Integrated Startup Current Source

 Lossless Off--Line Startup

 Direct Off--Line Operation

 Fast Startup

 Flexibility

 Duty Cycle Control

 Undervoltage Lockout with Hysteresis

 On Chip Oscillator Switching Frequency 40 or 75

 Secondary Control with Few External Components

 These are Pb--Free Devices*

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

*For additional information on our Pb--Free strategy and soldering details, please

download the ON Semiconductor Soldering and Mounting Techniques

Reference Manual, SOLDERRM/D.

http://onsemi.com

8

1

PDIP--8

P SUFFIX

CASE 626

MARKING DIAGRAM

8

MC44608Pxx

AWL

YYWWG

1

MC44608Pxx

A

WL

YY

WW

G

= Device Code

xx = 40 or 75

= Assembly Location

= Wafer Lot

= Year

= Work Week

= Pb--Free Package

PIN CONNECTIONS

Demag 1

Isense 2

Control Input 3

GND 4

8 Vi

7

6 VCC

5 Driver

(Top View)

ORDERING INFORMATION

See detailed ordering and shipping information in the package

dimensions section on page 2 of this data sheet.

 Semiconductor Components Industries, LLC, 2010

1

December, 2010 -- Rev. 10

Publication Order Number:

MC44608/D

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