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ML4833CS Datasheet(PDF) 2 Page - Micro Linear Corporation

Part # ML4833CS
Description  Electronic Dimming Ballast Controller
PDF  13 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4833CS Datasheet(HTML) 2 Page - Micro Linear Corporation

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ML4833
2
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.
6RSET
External resistor which sets oscillator
FMAX, and R(X)/C(X) charging current.
7RT/CT
Oscillator timing components.
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.
9RX/CX
Sets the timing for the preheat,
dimming lockout, and interrupt.
10 CRAMP
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 VREF
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
RSET
RT/CT
INTERRUPT
RX/CX
PVFB/OVP
VREF
VCC
PFC OUT
OUT A
OUT B
P GND
GND
CRAMP
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
VREF
VCC
PFC OUT
OUT A
OUT B
P GND
GND
CRAMP
PEAO
PIFB
PDWN
LAMP FB
LFB OUT
RSET
RT/CT
INTERRUPT
RX/CX
18
17
16
15
14
13
12
11
10
1
2
3
4
5
6
7
8
9
TOP VIEW



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