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International Rectifier Electronic Components Datasheet

IR21571PBF Datasheet

FULLY INTEGRATED BALLAST CONTROL IC

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Data Sheet PD No. 60179 revM
Not recommended for new design:
please use IRS21571D
IR21571(S) & (PbF)
FULLY INTEGRATED BALLAST CONTROL IC
Features
Programmable preheat time & frequency
Programmable ignition ramp
Protection from failure-to-strike
Lamp filament sensing & protection
Protection from operation below resonance -
0.2V CS threshold sync’d to falling edge on LO
Protection from low-line condition
Automatic restart for lamp exchange
Description
Thermal overload protection
Programmable deadtime
Integrated 600V level-shifting gate driver
Internal 15.6V zener clamp diode on VCC
Micropower startup (150uA)
Latch immunity protection on all leads
ESD protection on all leads
Parts also available LEAD-FREE
Packages
The IR21571 is a fully integrated, fully protected 600V ballast control IC designed
to drive virtually all types of rapid start fluorescent lamp ballasts. Externally pro-
grammable features such as preheat time & frequency, ignition ramp characteris-
tics, and running mode operating frequency provide a high degree of flexibility for
the ballast design engineer. Comprehensive protection features such as protec-
tion from failure of a lamp to strike, filament failures, low dc bus conditions, thermal
overload, or lamp failure during normal operation, as well as an automatic restart
function, have been included in the design. The heart of this control IC is a variable
frequency oscillator with externally programmable deadtime. Precise control of a
50% duty cycle is accomplished using a T-flip-flop. The IR21571 is available in both
16 pin DIP and 16 pin narrow body SOIC packages.
16 Lead SOIC
(narrow body)
16 Lead PDIP
Typical Connection
+ Rectified AC Line
+ VBUS
R2
R1
C1
CPH
CRAMP RPH
RT RRUN
CSTART RSTART
CT
ROC
RDT
VDC
1
CPH
2
RPH
3
RT
4
RUN
5
CT
6
DT
7
OC
8
HO
16
VS
15
VB
14
VCC
13
COM
12
LO
11
CS
10
SD
9
RSupply
RGHS
CBS
DBOOT
CVCC
R3 RGLS
R4
C2 RCS
CBLOCK LRES
CSNUBBER
D1
D2
R5
CRES
VBUS return
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1
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International Rectifier Electronic Components Datasheet

IR21571PBF Datasheet

FULLY INTEGRATED BALLAST CONTROL IC

No Preview Available !

IR21571(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
IRT
VCT
VDC
ICPH
IRPH
IRUN
IDT
VCS
ICS
IOC
ISD
ICC
dV/dt
PD
RthJA
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 (either output) due to
external power transistor miller effect
RT pin current
CT pin voltage
VDC pin voltage
CPH pin current
RPH pin current
RUN pin current
Deadtime pin current
Current sense pin voltage
Current sense pin current
Over-current threshold pin current
Shutdown pin current
Supply current (note 1)
Allowable offset voltage slew rate
Package power dissipation @ TA +25°C
PD = (TJMAX-TA)/RthJA
Thermal resistance, junction to ambient
(16 lead PDIP)
(16 lead SOIC)
(16 lead PDIP)
(16 lead SOIC)
Junction temperature
Storage temperature
Lead temperature (soldering, 10 seconds)
Min.
-0.3
VB - 25
VS - 0.3
-0.3
-500
-5
-0.3
-0.3
-5
-5
-5
-5
-0.3
-5
-5
-5
-20
-50
-55
-55
Max.
625
VB + 0.3
VB + 0.3
VCC + 0.3
500
5
5.5
VCC + 0.3
5
5
5
5
5.5
5
5
5
20
50
1.60
1.00
75
115
150
150
300
Units
V
mA
V
mA
V
mA
V/ns
W
°C/W
°C
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 www.irf.com
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Part Number IR21571PBF
Description FULLY INTEGRATED BALLAST CONTROL IC
Maker International Rectifier
Total Page 18 Pages
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