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IR21571 PDF Datasheet ( 特性, スペック, ピン接続図 )

部品番号 IR21571
部品説明 FULLY INTEGRATED BALLAST CONTROL IC
メーカ International Rectifier
ロゴ International Rectifier ロゴ 



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IR21571 Datasheet, IR21571 PDF,ピン配置, 機能
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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