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IR21571SのメーカーはInternational Rectifierです、この部品の機能は「FULLY INTEGRATED BALLAST CONTROL IC」です。 |
部品番号 | IR21571S |
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部品説明 | FULLY INTEGRATED BALLAST CONTROL IC | ||
メーカ | International Rectifier | ||
ロゴ | |||
このページの下部にプレビューとIR21571Sダウンロード(pdfファイル)リンクがあります。 Total 17 pages
Data Sheet PD No. 60179-I
IR21571(S)
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
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 program-
mable features such as preheat time & frequency, ignition ramp characteristics, and
running mode operating frequency provide a high degree of flexibility for the ballast
design engineer. Comprehensive protection features such as protection 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 accom-
plished 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
1 Page IR21571(S)
Recommended Operating Conditions
For proper operation the device should be used within the recommended conditions.
Symbol Definition
Min.
VBS
VS
VCC
ICC
VDC
CT
RDT
ROC
IRT
IRPH
IRUN
ISD
ICS
TJ
VBSMIN
High side floating supply voltage
Steady state high side floating supply offset voltage
Supply voltage
Supply current
VDC lead voltage
CT lead capacitance
Deadtime resistance
Over-current (CS+) threshold programming resistance
RT lead current (Note 3)
RPH lead current (Note 3)
RUN lead current (Note 3)
Shutdown lead current
Current sense lead current
Junction temperature
Minimum required VBS voltage for proper HO functionality
VCC - 0.7
-3.0
VCCUV+
Note 2
0
220
1.0
—
-500
0
0
-1
-1
-40
—
Max.
VCLAMP
600
VCLAMP
10
VCC
—
—
50
-50
450
450
1
1
125
5
Units
V
mA
V
pF
kΩ
uA
mA
oC
V
Electrical Characteristics
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.
Supply Characteristics
Symbol Definition
Min. Typ. Max. Units Test Conditions
VCCUV+
VUVHYS
IQCCUV
IQCCFLT
VCC supply undervoltage positive going
threshold
VCC supply undervoltage lockout hysteresis
UVLO mode quiescent current
Fault-mode quiescent current
10.5
1.5
50
75
IQCC Quiescent VCC supply current
2.9
ICC50K VCC supply current, f= 50kHz
4.0
VCLAMP VCC zener clamp voltage
14.5
11.4
1.8
150
200
3.8
5.5
15.6
12.4
2.2
300
300
4.3
7.0
16.5
VCC rising from 0V
V
VCC < VCCUV-
µA SD=5V, CS = 2V or
Tj > TSD
RT no connection, CT
connected to COM
mA RT =36kΩ, RDT =
5.6kΩ, CT=220pF
V ICC = 10mA
Note 2:
Note 3:
Enough current should be supplied into the VCC lead to keep the internal 15.6V zener clamp diode on this lead
regulating its voltage.
Due to the fact that the RT input is a voltage-controlled current source, the total RT lead current is the sum of all
the parallel current sources connected to that lead. For optimum oscillator current mirror performance, this total
current should be kept between 50µA and 500µA. During the preheat mode, the total current flowing out of the RT
lead consists of the RPH lead current plus the current due to the RT resistor. During the run mode, the total RT lead
current consists of the RUN lead current plus the current due to the RT resistor.
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3
3Pages IR21571(S)
Functional Block Diagram
VDC 1
3.0V
CPH 2
10V
5.1V
1.0uA
5.1V
RPH 3
RT 4
RUN 5
4.0V
IR
T
2.0V
CT 6
IC = IR
TT
DT 7
SQ
RQ
4.0V
2.0V
OC 8
50uA
7.6V
UNDER-
VOLTAGE
DETECT
LEVEL
SHIFT
PULSE
FILTER &
LATCH
14 VB
16 HO
15 VS
SQ
R1
R2 Q
TQ
RQ
QS
QR
QD
CLK
QR
OVER-
TEMP
DETECT
13 VCC
11 LO
15.6V
12 COM
0.2V
10 CS
7.6V
2.0V 7.6V
9 SD
Lead Assignments & Definitions
Pin # Symbol
Description
VDC 1
CPH 2
RPH 3
RT 4
RUN 5
CT 6
DT 7
OC 8
16 HO
15 VS
14 VB
13 VCC
12 COM
11 LO
10 CS
9 SD
1 VDC DC Bus Sensing Input
2 CPH Preheat Timing Capacitor
3 RPH Preheat Frequency Resistor & Ignition Capacitor
4 RT Oscillator Timing Resistor
5 RUN Run Frequency Resistor
6 CT Oscillator Timing Capacitor
7 DT Deadtime Programming
8 OC Over-current (CS+) Threshold Programming
9 SD Shutdown Input
10 CS Current Sensing Input
11 LO Low-Side Gate Driver Output
12 COM IC Power & Signal Ground
13 VCC Logic & Low-Side Gate Driver Supply
14 VB High-Side Gate Driver Floating Supply
15 VS High Voltage Floating Return
16 HO High-Side Gate Driver Output
6 www.irf.com
6 Page | |||
ページ | 合計 : 17 ページ | ||
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