ML4823CS datasheet(1/9 Pages) MICRO-LINEAR

Nome de Peças	ML4823CS

Descrição Electrónicos	High Frequency Power Supply Controller

PDF	9 Pages

Scroll/Zoom	100%

Fabricante Electrônico	MICRO-LINEAR [Micro Linear Corporation]

Página de início	http://www.microlinear.com

Logo

1 / 9 page

May 1997

ML4823

*

High Frequency Power Supply Controller

FEATURES

s

Practical operation at switching frequencies to 1.0MHz

s

High current (2A peak) totem pole output

s

Wide bandwidth error amplifier

s

Fully latched logic with double pulse suppression

s

Pulse-by-pulse current limiting

s

Soft start and max. duty cycle control

s

Under voltage lockout with hysteresis

s

5.1V trimmed bandgap reference

s

Low start-up current (1.1mA)

s

Pin compatible improved replacement for UC3823

s

Fast shut down path from current limit to output

s

Soft start latch ensures full soft start cycle

s

Outputs pull low for undervoltage lockout

GENERAL DESCRIPTION

The ML4823 High Frequency PWM Controller is an IC

controller optimized for use in Switch Mode Power

Supply designs running at frequencies to 1MHz.

Propagation delays are minimal through the comparators

and logic for reliable high frequency operation while slew

rate and bandwidth are maximized on the error amplifier.

This controller is designed for single-ended applications

using voltage or current mode and provides for input

voltage feed forward.

A 1V threshold current limit comparator provides cycle-

by-cycle current limit and exceeding a 1.4V threshold

initiates a soft-start cycle. The soft start pin doubles as a

maximum duty cycle clamp. All logic is fully latched to

provide jitter-free operation and prevent multiple pulsing.

An under-voltage lockout circuit with 800mV of hysteresis

assures low startup current and drives the outputs low

during fault conditions.

This controller is an improved second source for the

UC3823 controller; however, the ML4823 includes

features not found on the 3823. These features are set in

*Some Packages Are Obsolete

italics.

BLOCK DIAGRAM (Pin Configuration Shown for 16-Pin Version)

5

6

OSC

RT

CT

4

7

3

RAMP

E/A OUT

COMP

+

–

+

1.25V

S

R

Q

13

14

12

ERROR

AMP

+

–

2

1

NI

INV

POWER VC

OUTPUT

POWER GND

CLOCK OUT

8

SOFT START

V+

+

–

1V

11

9

ILIM REF

ILIM/S.D.

+

–

1.4V

–

+

S

R

Q

4V

5.1V

+

–

16

5.1V VREF

+

–

ENABLE

VREF

15

VCC

UNDER

VOLTAGE

LOCKOUT

9V

VREF GEN

10

SIGNAL GND

INTERNAL

BIAS

1

Nº de peça semelhante - ML4823CS

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Fairchild Semiconductor	ML4823CS	121Kb / 9P	High Frequency Power Supply Controller

More results

Descrição semelhante - ML4823CS

Fabricante Electrônico	Nome de Peças	Folha de dados	Descrição Electrónicos
Fairchild Semiconductor	ML4823	121Kb / 9P	High Frequency Power Supply Controller
Micro Linear Corporatio...	ML4810	165Kb / 12P	High Frequency Power Supply Controller
Micro Linear Corporatio...	ML4825	172Kb / 9P	High Frequency Power Supply Controller
JILIN SINO-MICROELECTRO...	3CG5401	187Kb / 6P	High frequency switching power supply
	3DG9013	179Kb / 5P	High frequency switching power supply
	BDW93C	220Kb / 5P	High frequency switching power supply
	BDW94C	227Kb / 5P	High frequency switching power supply
	HBR20S45	290Kb / 6P	High frequency switch power supply
	HBR20S45S	293Kb / 6P	High frequency switch power supply
	HBR4060	315Kb / 8P	High frequency switch power supply

More results

ML4823CS Folha de dados(PDF) 1 Page - Micro Linear Corporation

ML4823CS Folha de dados(HTML) 1 Page - Micro Linear Corporation

Nº de peça semelhante - ML4823CS

Descrição semelhante - ML4823CS

Html Pages

1 2 3 4 5 6 7 8 9

Folha de dados Download

Ligação URL