CS52843 datasheet(1/9 Pages) ONSEMI

No. de pieza	CS52843

Descripción Electrónicos	Current Mode PWM Control Circuit

PDF	9 Pages

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Fabricante Electrónico	ONSEMI [ON Semiconductor]

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July, 2006 − Rev. 4

1

Publication Order Number:

CS52843/D

CS52843

Current Mode

PWM Control Circuit

The CS52843 provides all the necessary features to implement

off−line fixed frequency current−mode control with a minimum

number of external components.

The CS52843 incorporates a new precision temperature−controlled

oscillator to minimize variations in frequency. An undervoltage

lockout ensures that VREF is stabilized before the output stage is

enabled. In the CS52843 turn on is at 8.4 V and turn off at 7.6 V.

Other features include low start−up current, pulse−by−pulse current

limiting, and a high−current totem pole output for driving capacitive

loads, such as gate of a power MOSFET. The output is low in the off

state, consistent with N−channel devices.

Features

• Optimized for Off−Line Control

• Internally Temperature Compensated Oscillator

• VREF Stabilized before Output Stage is Enabled

• Very Low Start−Up Current 300 μA (typ)

• Pulse−by−Pulse Current Limiting

• Improved Undervoltage Lockout

• Double Pulse Suppression

• 2.0% 5.0 Volt Reference

• High Current Totem Pole Output

http://onsemi.com

A

= Assembly Location

WL, L

= Wafer Lot

YY, Y

= Year

WW, W = Work Week

PIN CONNECTIONS AND

MARKING DIAGRAMS

SO−8

D SUFFIX

CASE 751

VREF

COMP

1

VFB

Sense

OSC

VCC

VOUT

GND

Device

Package

Shipping

ORDERING INFORMATION

CS52843ED8

SO−8

95 Units/Rail

CS52843EDR8

SO−8

CS52843ED14

SO−14

2500 Tape & Reel

CS52843EDR14

SO−14

2500 Tape & Reel

55 Units/Rail

1

8

SO−14

D SUFFIX

CASE 751A

GND

OSC

Pwr GND

NC

VOUT

Sense

VCC Pwr

NC

1

14

VCC

VFB

NC

VREF

COMP

1

14

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CS52843 Datasheet(PDF) 1 Page - ON Semiconductor

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