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參數(shù)資料
| 型號： | ML4833 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Electronic Dimming Ballast Controller(電子調(diào)光整流器控制器) |
| 中文描述： | 電子調(diào)光鎮(zhèn)流器控制器（電子調(diào)光整流器控制器） |
| 文件頁數(shù)： | 2/13頁 |
| 文件大?。?/td> | 136K |
| 代理商： | ML4833 |
ML4833
2
REV. 1.0 10/12/2000
PIN CONFIGURATION
PIN# NAME
FUNCTION
PIN# NAME
FUNCTION
1
PEAO
PFC error amplifier output and
compensation node.
2
PIFB
Sensing of the inductor current and
peak current sense point of the PFC
cycle by cycle current limit
comparator.
3
PDWN
A one volt comparator threshold that
switches the operating frequency to
the preheat frequency when exceeded.
4
LAMP FB
Inverting input of an error amplifier
used to sense (and regulate) lamp arc
current. Also the input node for
dimming control.
5
LFB OUT
Output of the lamp current error
transconductance amplifier used for
lamp current loop compensation.
6
R
SET
External resistor which sets oscillator
F
MAX
, and R(X)/C(X) charging current.
Oscillator timing components.
7
R
T
/C
T
PIN DESCRIPTION
8
INTERRUPT Input used for lamp-out detection and
restart. A voltage less than 1.25 volts
resets the chip and causes a restart
after a programmable interval.
9
R
X
/C
X
Sets the timing for the preheat,
dimming lockout, and interrupt.
10
C
RAMP
Integrated voltage of the error
amp out.
11
GND
Ground.
12
P GND
Power ground for the IC.
13
OUT B
Ballast MOSFET drive output.
14
OUT A
Ballast MOSFET drive output.
15
PFC OUT
Power Factor MOSFET drive output.
16
VCC
Positive supply for the IC.
17
V
REF
Buffered output for the 7.5V voltage
reference.
18
PVFB/OVP
Inverting input to PFC error amplifier
and OVP comparator input.
ML4833
18-Pin DIP (P18)
PEAO
PIFB
PDWN
LAMP FB
LFB OUT
R
SET
R
T
/C
T
INTERRUPT
R
X
/C
X
PVFB/OVP
V
REF
VCC
PFC OUT
OUT A
OUT B
P GND
GND
C
RAMP
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
TOP VIEW
ML4833
18-Pin SOIC (S18)
PVFB/OVP
V
REF
VCC
PFC OUT
OUT A
OUT B
P GND
GND
C
RAMP
PEAO
PIFB
PDWN
LAMP FB
LFB OUT
R
SET
R
T
/C
T
INTERRUPT
R
X
/C
X
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
TOP VIEW
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