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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)： | 9/15頁 |
| 文件大?。?/td> | 150K |
| 代理商： | ML4836 |
ML4836
REV. 1.0 10/12/2000
9
FUNCTIONAL DESCRIPTION
(Continued)
F
t
t
OSC
CHG
DIS
=
+
1
(3)
and
t
R C In
V
V
I
R
R
V
V
II
CHG
REF
CHG
T
TL
REF
CHG
T
TH
=
+
+
×
×
F
I
(4)
The oscillator’s minimum frequency is set when I
CHG
= 0
where:
F
R C
MIN
T
×
1
054
.
(5)
The oscillator's start frequency can be expressed by:
F
R
R
C
START
T
T
T
=
×
×
1
054
.
2
c
h
(5a)
Both equations assume that t
CHG
>> t
DIS
.
When LFB OUT is high, I
CHG
= 0 and the minimum
frequency occurs. The charging current varies according to
two control inputs to the oscillator:
1. The output of the preheat timer
2. The voltage at LFB OUT (lamp feedback amplifier
output)
In preheat condition, charging current is fixed at
I
R
CHG PREHEAT
(
SET
)
.
=
25
(6)
In running mode, charging current decreases as the
voltage rises from 0V to V
OH
at the LAMP FB amplifier.
The charging current behavior can be expressed as:
I
V
R
LEAO
k
±
8
CHG
SET
=
5
25%
(7)
The highest frequency is attained when I
CHG
is highest,
which is attained when voltage at LFB OUT is at 0V:
I
R
CHG
SET
( )
5
=
(8)
Highest lamp power, and lowest output frequency are
attained when voltage at LFB OUT is at its maximum
output voltage (V
OH
).
Figure 8. Typical V
CC
and I
CC
Waveforms when the ML4836 is Started with a Bleed Resistor from
the Rectified AC Line and Bootstrapped from an Auxiliary Winding.
VCCZ
V(ON)
V(OFF)
5.5mA
0.34mA
V
CC
I
CC
t
t
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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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