IRS21571D Datasheet, PDF (1/28 Pages) International Rectifier – FULLY INTEGRATED BALLAST CONTROL IC

April 21st, 2008
IRS21571D
FULLY INTEGRATED BALLAST CONTROL IC
IC Features
• Programmable preheat time and frequency
• Programmable ignition ramp
• Protection from failure-to-strike
• Lamp filament sensing and 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
• ^{Thermal overload protection}
• Programmable deadtime
• Integrated 600V level-shifting gate driver
• Integrated bootstrap MOSFET
• _{Integrated 15.6V zener clamp diode on VCC}
• ^{Low micro-power start-up}
• Latch immunity and ESD on all pins
Typical Application
• _{Fluorescent lamp ballast}
Product Summary
Topology
V_OFFSET
I_O+ & I_O- (typical)
Oscillator Frequency
Start-up current (typical)
Package Options
Half-Bridge
600 V
180 mA & 260 mA
+/- 5%
150 µA
16-Lead SOIC (Narrow Body)
Typical Connection Diagram
+ Rectified AC Line
+ V_BUS
R2
R1
C1
C_PH
C_RAMP R_PH
R_T
R_RUN
C_T
R_OC
R_DT
VDC
1
CPH
2
RPH
3
RT
4
RUN
5
CT
6
DT
7
OC
8
V_BUS return
HO
16
VS
15
VB
14
VCC
13
COM
12
LO
11
CS
10
SD
9
R_Supply
R_GHS
C_BS
C_VCC
R3 ^RGLS
R4
C2 R_CS
C_BLOCK L_RES
C_SNUBBER
D1
D2
R5
C_RES
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