ml4831 Microsemi Corporation, ml4831 Datasheet - Page 2

• Manufacturer Part Number: ml4831
• Description: Electronic Ballast Controller
• Manufacturer: Microsemi Corporation

ML4831
PIN CONFIGURATION
PIN DESCRIPTION
2
PIN# NAME
1
2
3
4
5
6
7
EA OUT
IA OUT
I(SINE)
IA+
LAMP F.B.
LFB OUT
R(SET)
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
MAX
, and R(X)/C(X) charging current
INTERRUPT
LAMP F.B.
R(T)/C(T)
LFB OUT
EA OUT
IA OUT
I(SINE)
R(SET)
IA+
18-Pin DIP (P18)
1
2
3
4
5
6
7
8
9
ML4831
TOP VIEW
PIN# NAME
10 R(X)/C(X)
12 P GND
13 OUT B
14 OUT A
15 PFC OUT
16 VCC
17 V
18 EA–/OVP
11 GND
8
9
18
17
16
15
14
13
12
11
10
R(T)C(T)
INTERRUPT Input used for lamp-out detection and
REF
EA–/OVP
V
VCC
PFC OUT
OUT A
OUT B
P GND
GND
R(X)/C(X)
REF
FUNCTION
Oscillator timing components
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
Power ground for the IC
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
Inverting input to PFC error amplifier
and OVP comparator input