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IR2156PBF
BALLAST CONTROL IC
International
1:212 Rectifier
Data Sheet No. PD60182-l
IR2156(S)&(PbF)
Featu res
o Ballast control and half-bridge driver in one IC
q Programmable preheat frequency
q Programmable preheat time
q Internal ignition ramp
q Programmable over-current threshold
q Programmable run frequency
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-
BALLAST CONTROL IC
q Programmable dead time
q DC bus under-voltage reset
q Shutdown pin with hysteresis
q Internal 15.6V zener clamp diode on Vcc
q Micropower startup (150VA)
o Latch immunity and ESD protection
q Also available LEAD-FREE (PbF)
Packages
14 Lead SOIC
ures, as well as an automatic restart function, have 14 Lead PDIP (narrow body)
been included in the design. The IR2156 is available in
both14lead PDIP and 14 lead SOIC packages.
CFL Application Diagram
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IR2156(S)&(PbF) International
TOR Rectifier
Absolute Maximum Ratings
Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur. All voltage
parameters are absolute voltages referenced to COM, all currents are defined positive into any lead. The thermal
resistance and power dissipation ratings are measured under board mounted and still air conditions.
Symbol Definition Min. Max. Units
VB High side floating supply voltage -0.3 625
Vs High side floating supply offset voltage VB - 25 VB + 0.3 V
VH0 High side floating output voltage Vs - 0.3 VB + 0.3
VLo Low side output voltage -0.3 Vcc + 0.3
IOMAX Maximum allowable output current (HO, LO) -500 500
due to external power transistor miller effect mA
VVDC VDC pin voltage -0.3 Vcc + 0.3
VCT CT pin voltage -O.3 Vcc + 0.3 V
IcpH CPH pin current -5 5
IRpH RPH pin current -5 5 mA
VRpH RPH pin voltage -0.3 VCC + 0.3 V
IRT RT pin current -5 5 mA
VRT RT pin voltage -O.3 VCC + 0.3
VCS Current sense pin voltage -0.3 5.5 V
ICS Current sense pin current -5
ISO Shutdown pin current -5 5 mA
ec Supply current (note 1) -20 20
dV/dt Allowable offset voltage slew rate -50 50 V/ns
PD Package power dissipation @ TA s: +25°C (14 pin PDIP) - 1.70
Po = (TJMAX-TA)/RthJA (14 pin SOIC) - 1.00 W
RthJA Thermal resistance, junction to ambient (14 pin PDIP) - 7O
(14 pin SOIC) - 120 oc/W
TJ Junction temperature -55 150
Ts Storage temperature -55 150 ''C
TL Lead temperature (soldering, 10 seconds) - 300
Note 1: This IC contains a zener clamp structure between the chip VCC and COM which has a nominal breakdown
voltage of 15.6V. Please note that this supply pin should not be driven by a DC, low impedance power source
greater than the VCLAMP specified in the Electrical Characteristics section.
2
