Datasheet > ML4835

ML4835

更新时间： 2024-02-06 09:53:39

品牌	Logo	应用领域
MICRO-LINEAR		电子控制器
页数	文件大小	规格书
17页	381K
描述
Compact Fluorescent Electronic Dimming Ballast Controller

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中文翻译

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ML4835 数据手册

July 2000

PRELIMINARY

ML4835*

Compact Fluorescent Electronic Dimming

Ballast Controller

GENERAL DESCRIPTION

FEATURES

The ML4835 is a complete solution for a dimmable or a

non-dimmable, high power factor, high efficiency

electronic ballast especially tailored for a compact

fluorescent lamp (CFL). The Bi-CMOS ML4835 contains

controllers for “boost” type power factor correction as

well as for a dimming ballast with end-of-lamp life

detection.

■ Power detect for end-of-lamp-life detection

■ Low distortion , high efficiency continuous boost, peak

or average current sensing PFC section

■ Leading- and trailing-edge synchronization between

PFC and ballast

■ One to one frequency operation between PFC and

ballast

The PFC circuits uses a new , simple PFC topology which

requires only one loop for compensation. In addition,

this PFC can be used with either peak- or average-current

mode. This system produces a power factor of better than

0.99 with low input currentTHD.

■ Programmable start scenario for rapid/instant start lamps

■ Triple frequency control network for dimming or

starting to handle various lamp sizes

■ Programmable restart for lamp out condition to reduce

ballast heating.

The ballast controller section provides for programmable

starting sequence with individual adjustable preheat and

lamp out-of-socket interrupt times. The ML4835 provides

a shut down for both PFC and ballast controllers in the

event of end-of-life for the CFL.

■ Internal over-temperature shutdown

■ PFC over-voltage comparator eliminates output

“runaway” due to load removal

■ Low start-up current; < 0.55mA

(* Indicates Part is End Of Life as of July 1, 2000)

BLOCK DIAGRAM

INTERRUPT

RAMP

CONTROL

AND

GATING

LOGIC

PIFBO

PIFB

LAMP FB

ANTI-FLASH

COMPENSATION

AND

POWER

FACTOR

CONTROLLER

LEAO

PEAO

POWER DIMMING LEVEL

INTERFACE

PVFB/OVP

OUT A

OUT B

VARIABLE FREQUENCY

OSCILLATOR

SET

R /C

OUTPUT

PFC OUT

THREE-FREQUENCY

CONTROL SEQUENCER

DRIVERS

PGND

VCO

PRE-HEAT AND

INTERRUPT TIMERS

R /C

LAMP OUT DETECT

AND

END-OF-LAMP DETECT

AND

POWER SHUTOFF

UNDER-VOLTAGE

AND

THERMAL SHUTDOWN

PWDET

AUTOMATIC LAMP

RESTART

AGND

REF

12 3 4 5 6 7...17

中文翻译

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与ML4835相关器件

型号	品牌	获取价格	描述	数据表
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
ML4836	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller
ML4836CP	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller
ML4836CS	MICRO-LINEAR	获取价格	Compact Fluorescent Electronic Dimming Ballast Controller
ML483-G	TRIQUINT	获取价格	0.7-10GHz HIgh IP3 Mixer with Integrated LO AMP
ML483-PCB	TRIQUINT	获取价格	0.7-10GHz HIgh IP3 Mixer with Integrated LO AMP
ML483PYA	COILCRAFT	获取价格	High Reliability Power Inductors
ML483PYA102MLH	COILCRAFT	获取价格	General Purpose Inductor, 1uH, 20%, 2625
ML483PYA102MLZ	COILCRAFT	获取价格	High Reliability Power Inductors

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