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參數(shù)資料
| 型號： | ML4830 |
| 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)： | 1/15頁 |
| 文件大?。?/td> | 134K |
| 代理商： | ML4830 |
March 1997
ML4830
*
Electronic Ballast Controller
GENERAL DESCRIPTION
The ML4830 is a complete solution for a dimmable, high
power factor, high efficiency electronic ballast.
Contained in the ML4830 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 ML4830 to increase system noise immunity by using a
high amplitude oscillator, and a gain modulator. An over-
voltage protection comparator stops the PFC section in
the event of sudden load decrease.
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 or Pulse Width control using
lamp current feedback.
The ML4830 is designed using Micro Linear‘s Semi-
Standard tile array methodology. Customized versions of
this IC, optimized to specific ballast architectures can be
made available. Contact Micro Linear or an authorized
representative for more information.
FEATURES
I
Complete Power Factor Correction and Dimming
Ballast Control on one IC
I
Low Distortion, High Efficiency Continuous Boost,
Average Current sensing PFC section
I
Programmable Start Scenario for Rapid or Instant Start
Lamps
I
Selectable Variable Frequency dimming and starting
I
Programmable Restart for lamp out condition to
reduce ballast heating
I
Over-Temperature Shutdown replaces external heat
sensor for safety
I
PFC Over-Voltage comparator eliminates output
“runaway” due to load removal
I
Large oscillator amplitude and gain modulator
improves noise immunity
*This Part Is End Of Life As Of August 1, 2000
BLOCK DIAGRAM
7
R(SET)
OSCILLATOR
9
R(T)/C(T)
12
R(X)/C(X)
PRE-HEAT
AND INTERRUPT
TIMERS
PWM OR
FREQUENCY
MODULATOR
10
INTERRUPT
11
OVP/INHIBIT
POWER
FACTOR
CONTROLLER
UNDER-VOLTAGE
AND THERMAL
SHUTDOWN
OUTPUT
DRIVERS
2
IA OUT
1
IA–
4
IA+/I(LIM)
3
I(SINE)
20
EA OUT
19
EA–
GND
13
PFC OUT
16
V
REF
18
VCC
17
OUT B
14
OUT A
15
LFB OUT
6
LAMP F.B.
5
MODE
8
REV. 1.0 10/12/2000
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ML4830CP | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Electronic Ballast Controller |
| ML4830CS | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Electronic Ballast Controller |
| ML4831 | 制造商:MICRO-LINEAR 制造商全稱:MICRO-LINEAR 功能描述:Electronic Ballast Controller |
| 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: |
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