ML4819CS datasheet(1/15 Pages) MICRO-LINEAR

Teilenummer	ML4819CS

Bauteilbeschribung	Power Factor and PWM Controller Combo

PDF	15 Pages

Scroll/Zoom	100%

Hersteller	MICRO-LINEAR [Micro Linear Corporation]

Direct Link	http://www.microlinear.com

Logo

1 / 15 page

May 1997

ML4819

*

Power Factor and PWM Controller “Combo”

1

GENERAL DESCRIPTION

The ML4819 is a complete boost mode Power factor

Controller (PFC) which also contains a PWM controller.

The PFC circuit is similar to the ML4812 while the PWM

controller can be used for current or voltage mode control

for a second stage converter. Since the PWM and PFC

circuits share the same oscillator, synchronization of the

two stages is inherent. The outputs of the controller IC

provide high current (>1A peak) and high slew rate to

quickly charge and discharge MOSFET gates. Special care

has been taken in the design of the ML4819 to increase

system noise immunity.

The PFC section is of the peak current sensing boost type,

using a current sense transformer or current sensing

MOSFETs to non-dissipatively sense switch current. This

gives the system overall efficiency over average current

sensing control method.

The PWM section includes cycle by cycle current limiting,

* Some Packages Are Obsolete

precise duty cycle limiting for single ended converters,

and slope compensation.

BLOCK DIAGRAM

+

–

RT

ISENSE B

ISENSE A

INV A

OVP

EA OUT A

–

ISINE

RAMP COMP

CT

ERROR

AMP

+

5V

IEA

IMULT

OSC

SLOPE

COMPENSATION

UNDER

VOLTAGE

LOCKOUT

S

R

Q

S

R

Q

DUTY CYCLE

ILIM

PWM B

OUT B

PGND B

PGND A

VREF

VCC

GND

OUT A

GM OUT

5V

0.7V

1V

10

20

12

7

11

9

8

14

18

17

16

15

13

1

3

2

5

4

6

19

GAIN MODULATOR

PWM

CONTROLLER

POWER FACTOR

CONTROLLER

+

–

FEATURES

s

Two 1A peak current totem-pole output drivers

s

Precision buffered 5V reference (±1%)

s

Large oscillator amplitude for better noise immunity

s

Precision duty cycle limit for PWM section

s

Current input gain modulator improves noise immunity

s

Programmable Ramp Compensation circuit

s

Over-Voltage comparator helps prevent output

“runaway”

s

Wide common mode range in current sense

compensators for better noise immunity

s

Under-Voltage Lockout circuit with 6V hysteresis

Please

See Ml48

24 for New

Designs

Ähnliche Beschreibung - ML4819CS

Hersteller	Teilenummer	Datenblatt	Bauteilbeschribung
Fairchild Semiconductor	ML4800	154Kb / 14P	Power Factor Correction and PWM Controller Combo
	ML4804	145Kb / 14P	Power Factor Correction and PWM Controller Combo
	ML4824	150Kb / 16P	Power Factor Correction and PWM Controller Combo
Micro Linear Corporatio...	ML4804	246Kb / 14P	Power Factor Correction and PWM Controller Combo
Micro Linear Corporatio...	ML4824	262Kb / 16P	Power Factor Correction and PWM Controller Combo
Fairchild Semiconductor	ML4824	105Kb / 15P	Power Factor Correction and PWM Controller Combo
	ML4800_0109	119Kb / 14P	Power Factor Correction and PWM Controller Combo
	ML4824CS2X	109Kb / 15P	Power Factor Correction and PWM Controller Combo
Linear Technology	LT1508	311Kb / 16P	Power Factor and PWM Controller
Linear Technology	LT1509	301Kb / 16P	Power Factor and PWM Controller

More results

ML4819CS Datenblatt(PDF) 1 Page - Micro Linear Corporation

ML4819CS Datenblatt(HTML) 1 Page - Micro Linear Corporation

Ähnliche Teilenummer - ML4819CS

Ähnliche Beschreibung - ML4819CS

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Datenblatt Download

Link URL