Datasheet > ML4824CS-2

ML4824CS-2

更新时间： 2024-09-27 22:15:51

品牌	Logo	应用领域
MICRO-LINEAR		功率因数校正控制器
页数	文件大小	规格书
16页	267K
描述
Power Factor Correction and PWM Controller Combo

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中文翻译

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数据手册

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ML4824CS-2 数据手册

June 1998

ML4824*

Power Factor Correction and PWM Controller Combo

GENERAL DESCRIPTION

FEATURES

The ML4824 is a controller for power factor corrected,

switched mode power supplies. Power Factor Correction

(PFC) allows the use of smaller, lower cost bulk capacitors,

reduces power line loading and stress on the switching

FETs, and results in a power supply that fully complies

with IEC1000-2-3 specification. The ML4824 includes

circuits for the implementation of a leading edge, average

current, “boost” type power factor correction and a trailing

edge, pulse width modulator (PWM).

■ Internally synchronized PFC and PWM in one IC

■ Low total harmonic distortion

■ Reduces ripple current in the storage capacitor between

the PFC and PWM sections

■ Average current, continuous boost leading edge PFC

■ Fast transconductance error amp for voltage loop

The device is available in two versions; the ML4824-1

PWM

= f ) and the ML4824-2 (f

= 2 x f ).

■ High efficiency trailing edge PWM can be configured

PFC

PWM

PFC

Doubling the switching frequency of the PWM allows the

user to design with smaller output components while

maintaining the best operating frequency for the PFC. An

over-voltage comparator shuts down the PFC section in the

event of a sudden decrease in load. The PFC section also

includes peak current limiting and input voltage brown-

out protection. The PWM section can be operated in

current or voltage mode at up to 250kHz and includes a

duty cycle limit to prevent transformer saturation.

for current mode or voltage mode operation

■ Average line voltage compensation with brownout

control

■ PFC overvoltage comparator eliminates output

“runaway” due to load removal

■ Current fed gain modulator for improved noise immunity

■ Overvoltage protection, UVLO, and soft start

BLOCK DIAGRAM

*Some Packages Are Obsolete

POWER FACTOR CORRECTOR

IEAO

VEAO

CCZ

OVP

REF

VEA

13.5V

7.5V

REFERENCE

IEA

3.5kΩ

–

2.7V

–1V

–

2.5V

–

GAIN

RMS

MODULATOR

PFC OUT

3.5kΩ

PFC I

LIMIT

SENSE

RAMP 1

OSCILLATOR

x 2

(-2 VERSION ONLY)

RAMP 2

DUTY CYCLE

LIMIT

–

1.25V

PWM OUT

–

50µA

–

2.5V

DC I

LIMIT

DC I

LIMIT

UVLO

CCZ

PULSE WIDTH MODULATOR

12 3 4 5 6 7...16

中文翻译

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与ML4824CS-2相关器件

型号	品牌	获取价格	描述	数据表
ML4824CS2X	ROCHESTER	获取价格	0.5A POWER FACTOR CONTROLLER WITH POST REGULATOR, 250kHz SWITCHING FREQ-MAX, PDSO16, SOIC-
ML4824IP1	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IP-1	MICRO-LINEAR	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IP-1	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IP2	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IP-2	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IP-2	MICRO-LINEAR	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IS1	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo
ML4824IS1	ROCHESTER	获取价格	0.5A POWER FACTOR CONTROLLER WITH POST REGULATOR, 250kHz SWITCHING FREQ-MAX, PDSO16, SOIC-
ML4824IS-1	FAIRCHILD	获取价格	Power Factor Correction and PWM Controller Combo

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