IR21571PBF Datasheet PDF - International Rectifier
Part Number | IR21571PBF | |
Description | FULLY INTEGRATED BALLAST CONTROL IC | |
Manufacturers | International Rectifier | |
Logo | ||
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Preview 1 page No Preview Available ! 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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IR21571(S) & (PbF)
Electrical Characteristics (cont.)
VCC = VBS = VBIAS = 14V +/- 0.25V, RT = 40.0kΩ, CT = 470 pF, RPH and RUN leads no connection, VCPH = 0.0V,
RDT = 6.1kΩ, ROC = 20.0kΩ, VCS = 0.5V, VSD = 0.0V, CL = 1000pF, TA = 25oC unless otherwise specified.
RUN Characteristics
Symbol Definition
Min. Typ. Max. Units Test Conditions
IRUNLK Open circuit RUN lead leakage current
VRUNFLT Fault-mode RUN lead voltage
— 0.01 0.1
µA VRUN = 5V
— 0 50 mV SD = 5V, CS = 2V,
or Tj > TSD
Protection Circuitry Characteristics
Symbol Definition
Min.
VSD+
VSDHYS
VCS+
VCS-
TCS
VDC+
VDC-
TSD
Rising shutdown lead threshold voltage
1.9
Shutdown pin threshold hysteresis
100
Over-current sense threshold voltage
0.99
Under-current sense threshold voltage
0.15
Over-current sense propogation delay
100
Low VBUS/rectified line input upper threshold
Low VBUS/rectified line input lower threshold
Thermal shutdown junction temperature
5.0
2.85
150
Typ.
2.1
150
1.10
0.2
250
5.20
3.3
160
Max.
2.3
200
1.21
0.26
400
5.6
3.3
170
Units Test Conditions
V
mV
V
nsec Delay from CS to LO
V
oC Note 4
Gate Driver Output Characteristics
Symbol Definition
VOL
VOH
tr
tf
Low-level output voltage
High level output voltage
Turn-on rise time
Turn-off fall time
Min.
—
—
55
35
Typ.
0
0
85
45
Max.
100
100
150
100
Units Test Conditions
mV
Io = 0
VBIAS - VO, Io = 0
nsec
Note 4: When the IC senses an overtemperature condition (Tj > 160ºC), the IC is latched off. In order to reset this
Fault Latch, the SD lead must be cycled high and then low, or the VCC supply to the IC must be cycled below
the falling undervoltage lockout threshold (VCCUV-).
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Information | Total 18 Pages | |
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