ML4830
PIN CONFIGURATION
ML4830
20-PIN PDIP (P20)
IA–
IA OUT
I(SINE)
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
MODE
R(T)/C(T)
INTERRUPT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
ML4830
20-PIN PDIP (P20)
EA OUT
EA–
V
REF
VCC
PFC OUT
OUT A
OUT B
GND
R(X)/C(X)
OVP/INHIBIT
IA–
IA OUT
I(SINE)
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
MODE
R(T)/C(T)
INTERRUPT
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
EA OUT
EA–
V
REF
VCC
PFC OUT
OUT A
OUT B
GND
R(X)/C(X)
OVP/INHIBIT
TOP VIEW
TOP VIEW
PIN DESCRIPTION
PIN# NAME
FUNCTION
PIN# NAME
FUNCTION
1
2
3
4
IA–
IA OUT
I(SINE)
IA+/I(LIM)
Inverting input of the PFC average
current error amplifier
Output and compensation node of the
PFC average current error amplifier
PFC gain modulator input
Non-Inverting input of the PFC
average current error amplifier and
input of peak 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
Amplifier used for lamp current loop
compensation
External resistor which sets oscillator
FMAX, and R(X)/C(X) charging current
Controls how the Lamp Current Error
Amp and preheat timers modulate the
ballast outputs. Two Variable
Frequency and 1 PWM mode are
available through this pin
Oscillator timing components
11 OVP/
INHIBIT
When the voltage of this pin exceeds
5V, the PFC output is inhibited. When
the voltage exceeds 6.7V, the IC
function is inhibited and the IC is
reset. This pin can be used for a
remote ballast shutdown.
Sets the timing for the preheat,
dimming lockout and interrupt
IC 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
Inverting input to PFC error amplifier
PFC Error Amplifier output and
compensation node
12 R(X)/C(X)
13 GND
14 OUT B
15 OUT A
16 PFC OUT
17 VCC
18 V
REF
19 EA–
20 EA OUT
5
LAMP F.B.
6
LFB OUT
7
8
R(SET)
MODE
9
R(T)/C(T)
10 INTERRUPT A voltage of greater than V
REF
resets
the chip and causes a restart after a
delay of 3 times the start interval. Used
for lamp-out detection and restart
2
MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
