Datasheet > ML4831

ML4831

更新时间： 2024-01-30 16:18:51

品牌	Logo	应用领域
MICRO-LINEAR		电子控制器
页数	文件大小	规格书
14页	195K
描述
Electronic Ballast Controller

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ML4831 数据手册

JULY 2000

ML4831*

Electronic Ballast Controller

GENERAL DESCRIPTION

FEATURES

The ML4831 is a complete solution for a dimmable, high

power factor, high efficiency electronic ballast. Contained

in the ML4831 are controllers for “boost” type power

factor correction as well as for a dimming ballast.

■

Complete Power Factor Correction and Dimming

Ballast Control on one IC

Low Distortion, High Efficiency Continuous Boost,

Average Current sensing PFC section

The Power factor circuit uses the average current sensing

method with a gain modulator and over-voltage

protection. This system produces power factors of better

than 0.99 with low input current THD at > 95%

efficiency. Special care has been taken in the design of the

ML4831 to increase system noise immunity by using a

high amplitude oscillator, and a current fed multiplier. An

over-voltage protection comparator inhibits the PFC

section in the event of a lamp out or lamp failure

condition.

Programmable Start Scenario for Rapid or Instant Start

Lamps

■

Lamp Current feedback for Dimming Control

Variable Frequency dimming and starting

Programmable Restart for lamp out condition to

reduce ballast heating

■

Over-Temperature Shutdown replaces external heat

sensor for safety

The ballast section provides for programmable starting

scenarios with programmable preheat and lamp out-of-

socket interrupt times. The IC controls lamp output

through either frequency modulation using lamp current

feedback.

PFC Over-Voltage comparator eliminates output

“runaway” due to load removal

Large oscillator amplitude and gain modulator

improves noise immunity

The ML4831 is designed using Micro Linear‘s Semi-

Standard tile array technology. Customized versions of this

IC, optimized to specific ballast architectures can be made

available. Contact Micro Linear or an authorized

representative for more information.

* This product is End Of Life as of July 1, 2000

BLOCK DIAGRAM

INTERRUPT

R(SET)

LAMP F.B.

OSCILLATOR

LFB OUT

R(T)/C(T)

OUTPUT

DRIVERS

OUT A

PRE-HEAT

AND INTERRUPT

TIMERS

R(X)/C(X)

CONTROL

GATING LOGIC

OUT B

PFC OUT

IA OUT

IA+

POWER

FACTOR

CONTROLLER

I(SINE)

EA OUT

EA–/OVP

PGND

VCC

UNDER-VOLTAGE

AND THERMAL

SHUTDOWN

REF

GND

12 3 4 5 6 7...14

中文翻译

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与ML4831相关器件

型号	品牌	获取价格	描述	数据表
ML4831CP	MICRO-LINEAR	获取价格	Electronic Ballast Controller
ML4832	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4832CP	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4832CS	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4833	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4833CP	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4833CS	MICRO-LINEAR	获取价格	Electronic Dimming Ballast Controller
ML4835	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller
ML4835CP	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller
ML4835CS	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller

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