ML4830
PIN CONFIGURATION
ML4830
20-PIN PDIP (P20)
ML4830
20-PIN PDIP (P20)
IA–
IA OUT
1
2
20
19
18
17
16
15
14
13
12
11
EA OUT
EA–
IA–
IA OUT
1
2
20
19
18
17
16
15
14
13
12
11
EA OUT
EA–
I(SINE)
3
V
REF
I(SINE)
3
V
REF
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
4
VCC
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
4
VCC
5
PFC OUT
OUT A
5
PFC OUT
OUT A
6
6
7
OUT B
7
OUT B
MODE
8
GND
MODE
8
GND
R(T)/C(T)
INTERRUPT
9
R(X)/C(X)
OVP/INHIBIT
R(T)/C(T)
INTERRUPT
9
R(X)/C(X)
OVP/INHIBIT
10
10
TOP VIEW
TOP VIEW
PIN DESCRIPTION
PIN# NAME
FUNCTION
PIN# NAME
FUNCTION
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.
1
IA–
Inverting input of the PFC average
current error amplifier
2
IA OUT
Output and compensation node of the
PFC average current error amplifier
3
4
I(SINE)
PFC gain modulator input
12 R(X)/C(X)
Sets the timing for the preheat,
dimming lockout and interrupt
IA+/I(LIM) Non-Inverting input of the PFC
average current error amplifier and
input of peak current limit comparator
13 GND
IC Ground
5
6
LAMP F.B. Inverting input of an Error Amplifier
used to sense (and regulate) lamp arc
current. Also the input node for
dimming control
14 OUT B
15 OUT A
16 PFC OUT
17 VCC
Ballast MOSFET drive output
Ballast MOSFET drive output
Power Factor MOSFET drive output
Positive Supply for the IC
LFB OUT
Output from the Lamp Current Error
Amplifier used for lamp current loop
compensation
18 V
Buffered output for the 7.5V voltage
reference
REF
7
8
R(SET)
External resistor which sets oscillator
FMAX, and R(X)/C(X) charging current
19 EA–
Inverting input to PFC error amplifier
MODE
Controls how the Lamp Current Error
Amp and preheat timers modulate the
ballast outputs. Two Variable
20 EA OUT
PFC Error Amplifier output and
compensation node
Frequency and 1 PWM mode are
available through this pin
9
R(T)/C(T)
Oscillator timing components
10 INTERRUPT A voltage of greater than V
resets
REF
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 ]
