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 (150
µA)
Latch immunity and ESD protection
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,
programmable dead-time, and programmable over-
current protection.
Comprehensive protection
features such as protection from failure of a lamp to
strike, filament failures, as well as an automatic
restart function, have been included in the design.
Packages
IR2156SPBF
SOICN14
IR2156PBF
PDIP14
Application Diagram
IR2156
1
IR2156(S)PbF
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
VB
VS
VHO
VLO
IOMAX
VDC
VCT
VCPH
ICPH
IRPH
VRPH
IRT
VRT
VCS
ICS
ISD
ICC
dV/dt
PD
R
θJA
TJ
TS
TL
Definition
High side floating supply voltage
High side floating supply offset voltage
High side floating output voltage
Low side output voltage
Maximum allowable output current (HO, LO)
due to external power transistor miller effect
VDC pin voltage
CT pin voltage
CPH pin voltage
CPH pin current
RPH pin current
RPH pin voltage
RT pin current
RT pin voltage
Current sense pin voltage
Current sense pin current
Shutdown pin current
Supply current (Note 1)
Allowable offset voltage slew rate
Package power dissipation @ TA
≤
+25ºC
PD = (T
JMAX
-T
A
)/RθJA
Thermal resistance, junction to ambient
(14-Pin DIP)
(14-Pin SOIC)
(14-Pin DIP)
(14-Pin SOIC)
Junction temperature
Storage temperature
Lead temperature (soldering, 10 seconds)
Min.
-0.3
VB - 25
VS - 0.3
-0.3
-500
-0.3
-0.3
-0.3
-5
-5
-0.3
-5
-0.3
-0.3
-5
-5
-20
-50
---
---
---
---
-55
-55
---
Max.
625
VB + 0.3
VB + 0.3
VCC + 0.3
500
VCC+0.3
VCC+0.3
VCC+0.3
5
5
VCC+0.3
5
VCC+0.3
5.5
5
5
20
50
1.80
1.40
70
82
150
150
300
Units
V
mA
V
mA
V
mA
V
mA
V/ns
W
ºC/W
ºC
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
IR2156(S)PbF
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol
VBS
VS
VCC
ICC
CT
ISD
ICS
TJ
Definition
High side floating supply voltage
Steady state high side floating supply offset voltage
Supply voltage
Supply current
CT lead capacitance
Shutdown lead current
Current sense pin current
Junction temperature
Min.
VBSUV+
-1
VCCUV+
Note 2
220
-1
-1
-25
Max.
VCLAMP
600
VCLAMP
10
---
1
1
125
Units
V
mA
pF
mA
ºC
Note 2: Enough current should be supplied into the VCC pin to keep the internal 15.6V zener clamp diode on this pin
regulating at its voltage, VCLAMP.
Electrical Characteristics
VCC = VBS = VBIAS = 14V +/- 0.25V, VVDC=Open, RT=40KΩ, RPH=100KΩ, CT=470 pF, VCPH=0.0V, VSD=0.0V,
VCS=0.0V, CLO=CHO=1000 pF, TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max Units
Test Conditions
Supply Characteristics
VCCUV+
VCC supply undervoltage positive going
threshold
V
supply undervoltage negative going
VCCUV- CC
threshold
10.5
8.5
1.5
50
---
---
1.3
14.5
11.5
9.5
2.0
120
200
1.0
1.5
15.6
12.5
10.5
3.0
200
470
1.5
mA
ICC40k VCC supply current, f = 40kHz
VCLAMP VCC zener clamp voltage
1.7
16.5
V
µA
VCC=11V
SD = 5.1V, or
CS = 1.3V
CT connected to COM,
VCC = 14V, RT = 15kΩ
VCPH=12V, VVDC=12V
ICC = 5mA
V
VCC rising from 0V
VCC falling from 14V
VUVHYS VCC supply undervoltage lockout hysteresis
IQCCUV UVLO mode quiescent current
IQCCFLT Fault-mode quiescent current
IQCC
Quiescent VCC supply current
Floating Supply Characteristics
IQBS0
IQBS1
ILK
Quiescent VBS supply current
Quiescent VBS supply current
Offset supply leakage current
-5
---
---
0
30
---
5
50
50
µA
µA
VHO = VS (CT=0V)
VHO = VB (CT=14V)
VB = VS = 600V
3
IR2156(S)PbF
Electrical Characteristics
VCC = VBS = VBIAS = 14V +/- 0.25V, VVDC=Open, RT=40KΩ, RPH=100KΩ, CT=470 pF, VCPH=0.0V, VSD=0.0V,
VCS=0.0V, CLO=CHO=1000 pF, TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ
Max Units
Test Conditions
Oscillator, Ballast Control, I/O Characteristics
f
OSCRUN Oscillator frequency during RUN mode
f
OSCPH Oscillator frequency during PH mode
d
VCT+
VCT-
VCTFLT
Oscillator duty cycle
Upper CT ramp voltage threshold
Lower CT ramp voltage threshold
Fault-mode CT pin voltage
LO output deadtime
HO output deadtime
Internal deadtime resistor
36.0
49.0
---
---
---
---
---
---
---
40.0
55.0
50
8.3
4.8
0
2.0
2.0
3
44.0
kHz
60.0
---
---
---
---
---
µsec
---
---
kΩ
V
%
VCC=14V
SD>5.1V or CS>1.3V
VVDC=14V,
VCPH=Open
VVDC=14V,
VCPH=COM
t
DLO
t
DHO
RDT
Preheat Characteristics
ICPH
CPH pin charging current
3.6
---
4.3
0
5.2
---
µA
mV
CT=10V, VDC=5V,
VCPH=0V
SD>5.1V or CS>1.3V
VCPHFLT Fault-mode CPH pin voltage
RPH Characteristics
IRPHLK
Open circuit RPH pin leakage current
---
---
0.1
0
---
---
µA
mV
CT=10V
SD>5.1V or CS>1.3V
VRPHFLT Fault-mode RPH pin voltage
RT Characteristics
IRTLK
VRTFLT
Open circuit RT pin leakage current
Fault-mode RT pin voltage
---
---
0.1
0
---
---
µA
mV
CT=10V
SD>5.1V or CS>1.3V
Protection Circuitry Characteristics
VSDTH+
VSDHYS
VCSTH+
Rising shutdown pin threshold voltage
SD pin Reset threshold voltage
Over-current sense threshold voltage
Over-current sense propogation delay
Over-current sense minimum pulse width
DC bus sensing resistor
---
---
1.1
---
---
7.5
10.3
5.1
450
1.25
160
135
10.0
10.9
---
---
1.44
---
---
14.0
11.4
nsec
V
mV
V
Delay from CS to LO
VCS pulse amplitude =
VCSTH + 100mV
VCPH>12V, VDC=7V,
CT=0
VCPH open, VDC=0V
t
CS
VCSPW
RVDC
kΩ
V
VCPH-VDC
CPH to VDC offset voltage
4
IR2156(S)PbF
Electrical Characteristics
VCC = VBS = VBIAS = 14V +/- 0.25V, VVDC=Open, RT=39KΩ, RPH=100KΩ, CT=470 pF, VCPH=0.0V, VSD=0.0V,
VCS=0.0V, CLO=CHO=1000 pF, TA=25C unless otherwise specified.
Symbol
Definition
Min
Typ Max Units
Test Conditions
Gate Driver Output Characteristics
VOL
VOH
Low-level output voltage
High-level output voltage
Turn-on rise time
Turn-off fall time
---
---
---
---
COM
VCC
110
55
---
---
150
100
V
IO = 0
IO = 0
t
r
t
f
nsec
5
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