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參數(shù)資料
| 型號(hào)： | ML4835 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Compact Fluorescent Electronic Dimming Ballast Controller(小型熒光管整流器控制器) |
| 中文描述： | 緊湊型熒光燈電子調(diào)光鎮(zhèn)流器控制器（小型熒光管整流器控制器） |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大小： | 214K |
| 代理商： | ML4835 |
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July 2000
PRELIMINARY
ML4835
*
Compact Fluorescent Electronic Dimming
Ballast Controller
GENERAL DESCRIPTION
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.
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 current THD.
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.
BLOCK DIAGRAM
FEATURES
I
Power detect for end-of-lamp-life detection
I
Low distortion , high efficiency continuous boost, peak
or average current sensing PFC section
I
Leading- and trailing-edge synchronization between
PFC and ballast
I
One to one frequency operation between PFC and
ballast
I
Programmable start scenario for rapid/instant start lamps
I
Triple frequency control network for dimming or
starting to handle various lamp sizes
I
Programmable restart for lamp out condition to reduce
ballast heating.
I
Internal over-temperature shutdown
I
PFC over-voltage comparator eliminates output
“runaway” due to load removal
I
Low start-up current; < 0.55mA
7
RSET
9
RT/CT
8
RT2
13
CRAMP
4
PIFBO
3
PIFB
2
PEAO
1
PVFB/OVP
12
PWDET
10
INTERRUPT
5
LAMP FB
6
LEAO
17
OUT A
16
OUT B
18
PFC OUT
15
PGND
11
RX/CX
19
VCC
20
REF
14
AGND
OUTPUT
DRIVERS
PRE-HEAT AND
INTERRUPT TIMERS
LAMP OUT DETECT
AND
AUTOMATIC LAMP
RESTART
UNDER-VOLTAGE
AND
THERMAL SHUTDOWN
END-OF-LAMP DETECT
AND
POWER SHUTOFF
ANTI-FLASH
COMPENSATION
AND
POWER DIMMING LEVEL
INTERFACE
CONTROL
AND
GATING
LOGIC
THREE-FREQUENCY
CONTROL SEQUENCER
VCO
VARIABLE FREQUENCY
OSCILLATOR
POWER
FACTOR
CONTROLLER
(* Indicates Part is End Of Life as of July 1, 2000)
REV. 1.0 10/12/2000
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ML4836 | Compact Fluorescent Electronic Dimming Ballast Controller(小型熒光管整流器控制器) |
| ML4841 | Variable Feedforward PFC/PWM Controller Combo(前饋可變PFC/PWM控制器組合芯片) |
| ML4851 | Low Current, Voltage Boost Regulator(小電流升壓穩(wěn)壓器) |
| ML4854IT | Adjustable, Low-Current, 2-Cell Boost Regulator with Shutdown and Low Battery Detect |
| ML4854 | Adjustable, Low-Current, 2-Cell Boost Regulator with Shutdown and Low Battery Detect |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4835CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Compact Fluorescent Electronic Dimming Ballast Controller |
| ML4835CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Compact Fluorescent Electronic Dimming Ballast Controller |
| ML4836 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Compact Fluorescent Electronic Dimming Ballast Controller |
| ML4836CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Compact Fluorescent Electronic Dimming Ballast Controller |
| ML4836CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Compact Fluorescent Electronic Dimming Ballast Controller |
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