Data Sheet No. PD60182-I
IR2156
(S) & (PbF)
BALLAST CONTROL IC
Features
•
Ballast control and half-bridge driver in one IC
•
Programmable preheat frequency
•
Programmable preheat time
•
Internal ignition ramp
•
Programmable over-current threshold
•
Programmable run frequency
•
Programmable dead time
•
DC bus under-voltage reset
•
Shutdown pin with hysteresis
•
Internal 15.6V zener clamp diode on Vcc
•
Micropower startup (150µA)
•
Latch immunity and ESD protection
•
Also available LEAD-FREE (PbF)
Description
The IR2156 incorporates a high voltage half-bridge
gate driver with a programmable oscillator and state
diagram to form a complete ballast control IC. The
IR2156 features include programmable preheat and
run frequencies, programmable preheat time, program-
mable dead-time, and programmable over-current pro-
tection. Comprehensive protection features such as
protection from failure of a lamp to strike,filament fail-
ures, as well as an automatic restart function, have
been included in the design. The IR2156 is available in
both 14 lead PDIP and 14 lead SOIC packages.
Packages
14 Lead PDIP
14 Lead SOIC
(narrow body)
CFL Application Diagram
R
BUS
R
SUPPLY
D
BOOT
D
RECT1
L
FILTE
R
L
F1
NC
VCC
1
2
14
13
VB
D
CP2
M1
L
RES
C
ELCAP1
C
FILTE
R
HO
IR2156
C
VCC2
C
VCC1
VDC
3
RT
12
11
10
9
VS
N
M2
C
CP
R
1
C
CS
R
CS
C
SNUB
C
RES
4
R
T
R
PH
RPH
LO
C
BOOT
5
CT
CS
SD
6
CPH
C
ELCAP1
D
CP1
D
RECT2
COM
7
C
T
C
VDC
C
CPH
8
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