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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)： | 6/17頁(yè) |
| 文件大小： | 214K |
| 代理商： | ML4835 |
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ML4835
6
REV. 1.0 10/12/2000
FUNCTIONAL DESCRIPTION
The ML4835 consists of peak or average current
controlled continuous boost power factor front end section
with a flexible ballast control section. Start-up and lamp-
out retry timing are controlled by the selection of external
timing components, allowing for control of a wide variety
of different lamp types. The ballast section controls the
lamp power using frequency modulation (FM) with
additional programmability provided to adjust the VCO
frequency range. This allows for the IC to be used with a
variety of different output networks. Figure 1 depicts a
detailed block diagram of ML4835.
The ML4835 provides several safety features. See the
corresponding sections for more details:
End-of-lamp life detection to detect EOL and shut-off
lamps; See End Of Life Section.
Thermal shutdown for temperature sensing extremes;
See IC Bias, Under-Voltage Lockout and Thermal
Shutdown Section.
Relamping starting with anti-flash for programmable
restart for lamp out conditions while minimizing
“flashing” when powering from full power to dimming
levels; See Starting, Re-Start, Preheat and Interrupt
Section
Figure 1. Detailed Block Diagram
VCC
19
REF
20
AGND
14
CRAMP
13
PVFB/OVP
1
PEAO
2
PIFB
PIFBO
4
PFC OUT
18
RSET
7
LAMP FB
5
LEAO
6
RT2
8
INTERRUPT
10
PWDET
12
PGND
15
OUT B
16
OUT A
17
REF
–
+
14V
+
–
6.75V
Q
Q
R
S
Q
Q
T
+
–
TEMP
130oC/100oC
+
–
1.25V/1V
RX/CX
6.75V/1.25V
2.5V
+
–
1.0V
Q
Q
S
R
–
+
–
+
+
–
4.75V/
1.75V
+
–
PVFB
2.75V
+
–
–1V
+
–
3
R
S
Q
Q
R
S
Q
Q
–
+
2.5V
V
TO
I
÷2
CLK1
CLK
RX/CX
11
PFC CONTROLLER
OVP
ILIM
UVLO
REF_OK
PREHEAT
THERMAL SHUTDOWN
RT/CT
9
OSCILLATOR
V
TO
I
V
TO
I
COMP
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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