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參數(shù)資料
| 型號： | ML4836 |
| 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） |
| 文件頁數(shù)： | 6/15頁 |
| 文件大小： | 150K |
| 代理商： | ML4836 |
ML4836
6
REV. 1.0 10/12/2000
Figure 2. Three Frequency Design Model
Figure 3. Output Configuration
START
HIGH Q
LOW Q
OPERATION
PREHEAT
f3
f2
f1
ML4836
SET TIME VALUES
FOR PREHEAT,
START AND OPERATION,
AND RESTART
CURRENT
MIRROR
IN
OUT
CURRENT
MIRROR
IN
OUT
gmV
IN
2
io = gmV
IN
IQ +
gmV
IN
2
IQ –
The ML4836 implements a triple frequency operation
scheme: programmable three-frequency sequence for pre-
heat, ignition, and dimming, that extends lamp life,
simplifies lamp network design, and starts lamps at any
dimming level without flashing. This addresses the need
for a high-Q network for starting sequence and low-Q
network for operation, minimizing parasitic losses and
improving overall power efficiency. The values for the
pre-heat, start, operation, and restart can be programmed
or selected (Figure 2).
TRANSCONDUCTANCE AMPLIFIERS
The Lamp voltage feedback amplifier is implemented as
an operational transconductance amplifier. It is designed
to have low small signal forward transconductance such
that a large value of load resistor (R1) and a low value
ceramic capacitor (<1μF) can be used for AC coupling
(C1) in the frequency compensation network. The
compensation network shown in Figure 5 will introduce a
zero and a pole at:
f
R C
f
R C
Z
P
=
=
1
2
1
2
1
2
π
π
(2)
Figure 3 shows the output configuration for the operational
transconductance amplifiers.
A DC path to ground or V
CC
at the output of the
transconductance amplifiers will introduce an offset error.
FUNCTIONAL DESCRIPTION
(Continued)
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| ML4854IT | Adjustable, Low-Current, 2-Cell Boost Regulator with Shutdown and Low Battery Detect |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| ML483-G | 功能描述:射頻混合器 .7-1.0GHz 5Volts RoHS:否 制造商:NXP Semiconductors 頻率范圍: 轉(zhuǎn)換損失——最大: 工作電源電壓:6 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ML483-PCB | 功能描述:射頻混合器 .7-1.0GHz 5Volts Eval Brd RoHS:否 制造商:NXP Semiconductors 頻率范圍: 轉(zhuǎn)換損失——最大: 工作電源電壓:6 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| ML483PYA | 制造商:COILCRAFT 制造商全稱:Coilcraft lnc. 功能描述:High Reliability Power Inductors |
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