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ML4836CS Compact Fluorescent Electronic Dimming Ballast Controller
型号:   ML4836CS
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描述:   Compact Fluorescent Electronic Dimming Ballast Controller
文件大小 :   308 K    15 页
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品牌   MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
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July 2000
PRELIMINARY
ML4836*
Compact Fluorescent
Electronic Dimming Ballast Controller
GENERAL DESCRIPTION
The ML4836 is a complete solution for a dimmable or a
non-dimmable high efficiency electronic ballast especially
tailored for a compact fluorescent lamp (CFL). The
Bi-CMOS ML4836 contains controllers for dimming
ballast with end-of-life detection capability.
The ballast controller section provides for programmable
starting sequence with individual adjustable preheat and
lamp out-of-socket interrupt times. The ML4836 provides
latch type shut down comparator for ballast controllers in
the event of end-of-life for the CFL.
FEATURES
s
s
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.
Internal over-temperature shutdown
Low start-up current; < 0.55mA
(* Indicates Part is End Of Life as of July 1, 2000)
s
s
s
BLOCK DIAGRAM
INTERRUPT
CONTROL
AND
GATING
LOGIC
7
LAMP FB
2
LEAO
3
ANTI-FLASH
COMPENSATION
AND
DIMMING LEVEL
INTERFACE
RSET
RT/CT
RT2
VCO
VARIABLE FREQUENCY
OSCILLATOR
THREE-FREQUENCY
CONTROL SEQUENCER
OUT A
13
OUT B
OUTPUT
DRIVERS
PGND
11
PRE-HEAT AND
INTERRUPT TIMERS
END-OF-LAMP DETECT
AND
POWER SHUTOFF
UNDER-VOLTAGE
AND
THERMAL SHUTDOWN
AGND
REF
10
1
VCC
14
LAMP OUT DETECT
AND
AUTOMATIC LAMP
RESTART
RX/CX
8
12
4
6
5
PWDET
9
1
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