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ML4830 Datasheet(PDF) 2 Page - Micro Linear Corporation

Part # ML4830
Description  Electronic Ballast Controller
Download  15 Pages
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Manufacturer  MICRO-LINEAR [Micro Linear Corporation]
Direct Link  http://www.microlinear.com
Logo MICRO-LINEAR - Micro Linear Corporation

ML4830 Datasheet(HTML) 2 Page - Micro Linear Corporation

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ML4830
2
PIN CONFIGURATION
PIN# NAME
FUNCTION
PIN# NAME
FUNCTION
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
I(SINE)
PFC gain modulator input
4
IA+/I(LIM)
Non-Inverting input of the PFC
average current error amplifier and
input of peak current limit comparator
5
LAMP F.B.
Inverting input of an Error Amplifier
used to sense (and regulate) lamp arc
current. Also the input node for
dimming control
6
LFB OUT
Output from the Lamp Current Error
Amplifier used for lamp current loop
compensation
7
R(SET)
External resistor which sets oscillator
FMAX, and R(X)/C(X) charging current
8
MODE
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
9
R(T)/C(T)
Oscillator timing components
10 INTERRUPT A voltage of greater than VREF resets
the chip and causes a restart after a
delay of 3 times the start interval. Used
for lamp-out detection and restart
PIN DESCRIPTION
11 OVP/
When the voltage of this pin exceeds
INHIBIT
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.
12 R(X)/C(X)
Sets the timing for the preheat,
dimming lockout and interrupt
13 GND
IC Ground
14 OUT B
Ballast MOSFET drive output
15 OUT A
Ballast MOSFET drive output
16 PFC OUT
Power Factor MOSFET drive output
17 VCC
Positive Supply for the IC
18 VREF
Buffered output for the 7.5V voltage
reference
19 EA–
Inverting input to PFC error amplifier
20 EA OUT
PFC Error Amplifier output and
compensation node
IA–
IA OUT
I(SINE)
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
MODE
R(T)/C(T)
INTERRUPT
EA OUT
EA–
VREF
VCC
PFC OUT
OUT A
OUT B
GND
R(X)/C(X)
OVP/INHIBIT
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)
TOP VIEW
IA–
IA OUT
I(SINE)
IA+/I(LIM)
LAMP F.B.
LFB OUT
R(SET)
MODE
R(T)/C(T)
INTERRUPT
EA OUT
EA–
VREF
VCC
PFC OUT
OUT A
OUT B
GND
R(X)/C(X)
OVP/INHIBIT
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)
TOP VIEW


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