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參數(shù)資料
| 型號： | ML4831 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Electronic Ballast Controller(電子整流器控制器) |
| 中文描述： | 電子鎮(zhèn)流器控制器（電子整流器控制器） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大小： | 165K |
| 代理商： | ML4831 |
GENERAL DESCRIPTION
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.
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.
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.
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
FEATURES
I
Complete Power Factor Correction and Dimming
Ballast Control on one IC
Low Distortion, High Efficiency Continuous Boost,
Average Current sensing PFC section
I
I
Programmable Start Scenario for Rapid or Instant Start
Lamps
I
Lamp Current feedback for Dimming Control
I
Variable Frequency dimming and starting
Programmable Restart for lamp out condition to
reduce ballast heating
I
I
Over-Temperature Shutdown replaces external heat
sensor for safety
I
PFC Over-Voltage comparator eliminates output
“runaway” due to load removal
Large oscillator amplitude and gain modulator
improves noise immunity
I
BLOCK DIAGRAM
JU
L
Y 2000
ML4831
*
Electronic Ballast Controller
1
7
R(SET)
OSCILLATOR
8
R(T)/C(T)
10
R(X)/C(X)
PRE-HEAT
AND INTERRUPT
TIMERS
CONTROL
&
GATING LOGIC
2
IA OUT
4
IA+
POWER
FACTOR
CONTROLLER
UNDER-VOLTAGE
AND THERMAL
SHUTDOWN
OUTPUT
DRIVERS
3
I(SINE)
1
EA OUT
18
EA–/OVP
V
REF
17
PFC OUT
15
GND
11
VCC
16
PGND
12
OUT B
13
OUT A
14
LFB OUT
6
LAMP F.B.
5
INTERRUPT
9
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ML483-1 | 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR 136KG 4" SWIVEL/BRAK 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC, For Use With:Industrial and Material Handling Applications, Carrying Capacity:136kg, Wheel Diameter:100mm , RoHS Compliant: NA |
| ML4831CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
| ML483-1W | 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR 136KG 4" SWIVEL/BRAK 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC 制造商:CLARKE INTERNATIONAL 功能描述:CASTOR, 136KG, 4", SWIVEL/BRAKE, PLASTIC, For Use With:Industrial and Material Handling Applications, Carrying Capacity:136kg, Wheel Diameter:100mm , RoHS Compliant: NA |
| ML4832 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Electronic Dimming Ballast Controller |
| ML4832CP | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Fairchild Semiconductor Corporation 功能描述: |
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