MC44608 查看數據表（PDF） - Motorola => Freescale

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MC44608

Few External Components Reliable and Flexible GreenLine™ Very High Voltage PWM Controller

Motorola => Freescale 

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MC44608

Advance Information

Few External Components

Reliable and Flexible

GreenLine™ Very High Voltage

PWM Controller

The MC44608 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 1W while

delivering 300mW in a 150W SMPS.

FEW EXTERNAL COMPONENTS

RELIABLE AND FLEXIBLE

GreenLine™

VERY HIGH VOLTAGE

PWM CONTROLLER

SILICON MONOLITHIC

INTEGRATED CIRCUIT

• Integrated Start–Up Current Source

• Lossless Off–Line Start–Up

• Direct Off–Line Operation

• Fast Start–Up

General Features

• Flexibility

• Duty Cycle Control

• Undervoltage Lockout with Hysteresis

• On Chip Oscillator Switching Frequency 40, 75, or 100kHz

• 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

GreenLine™ Controller

• Pulsed Mode Techniques for a Very High Efficiency Low Power Mode

• Lossless Startup

• Low dV/dT for Low EMI Radiations

8

1

P SUFFIX

PLASTIC PACKAGE

CASE 626

(DIP–8)

PIN CONNECTIONS

Demag 1

Isense 2

Control Input 3

Gnd 4

8 Vi

7

6 Vcc

5 Driver

(Top View)

GreenLine is a trademark of Motorola, Inc.

ORDERING INFORMATION

Device

Switching

Frequency

Package

MC44608P40

40kHz

Plastic DIP–8

MC44608P75

75kHz

Plastic DIP–8

MC44608P100

100kHz

Plastic DIP–8

This document contains information on a new product. Specifications

ManOdTinOfoRrmOatLioAn hAerNeinAaLreOsGubjIeCctDtoEchVaInCgEe wDithAoTuAt notice.

© Motorola, Inc. 1999

Rev 0, 07/1999

1

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