ml4832 Microsemi Corporation, ml4832 Datasheet - Page 2

• Manufacturer Part Number: ml4832
• Description: Electronic Dimming Ballast Controller
• Manufacturer: Microsemi Corporation

ML4832
PIN CONFIGURATION
PIN DESCRIPTION
PIN# NAME
2
1
2
3
4
5
6
7
8
EA OUT
IA OUT
I
IA+
LAMP FB
LFB OUT
R
R
SINE
SET
T
/C
INTERRUPT
T
LAMP FB
LFB OUT
EA OUT
IA OUT
R
I
T
R
SINE
IA+
/C
SET
T
FUNCTION
PFC error amplifier output and
compensation node
Output and compensation node of the
PFC average current transconductance
amplifier
PFC gain modulator input
Non-inverting input of the PFC average
current transconductance amplifier
and peak current sense point of the
PFC cycle by cycle current limit
comparator
Inverting input of an error amplifier
used to sense (and regulate) lamp arc
current. Also the input node for
dimming control.
Output from the lamp current error
transconductance amplifier used for
lamp current loop compensation
External resistor which sets oscillator
F
Oscillator timing components
MAX
18-Pin DIP (P18)
1
2
3
4
5
6
7
8
9
, and R
ML4832
TOP VIEW
X
/C
18
17
16
15
14
13
12
11
10
X
charging current
EA–/OVP
V
V
PFC OUT
OUT A
OUT B
P GND
GND
R
X
REF
CC
/C
X
PIN#
10
11
12
13
14
15
16
17
18
9
INTERRUPT
NAME
INTERRUPT
R
GND
P GND
OUT B
OUT A
PFC OUT
V
V
EA–/OVP
LAMP FB
LFB OUT
EA OUT
X
IA OUT
CC
REF
/C
R
I
R
T
SINE
IA+
/C
X
SET
T
18-Pin SOIC (S18)
1
2
3
4
5
6
7
8
9
FUNCTION
Power ground for the IC
Inverting input to PFC error
Input used for lamp-out detection
and restart. A voltage greater than
7.5 volts resets the chip and
causes a restart after a
programmable interval.
Sets the timing for the preheat,
dimming lockout, and interrupt
Ground
Ballast MOSFET drive output
Ballast MOSFET drive output
Power Factor MOSFET drive
output
Positive supply for the IC
Buffered output for the 7.5V
voltage reference
amplifier and OVP comparator
input
ML4832
TOP VIEW
18
17
16
15
14
13
12
11
10
EA–/OVP
V
V
PFC OUT
OUT A
OUT B
P GND
GND
R
REF
CC
X
/C
X