SD42509 Datasheet, PDF (2/7 Pages) Silan Microelectronics Joint-stock – 1A WHITE LED DRIVER

SD42509
ABSOLUTE MAXIMUM RATING
Characteristics
Supply Voltage
Switch Voltage
Boost Voltage
Feedback Voltage
Comp Voltage
LED Voltage
Junction Temperature
Lead Temperature
Storage Temperature
Input Voltage
Operating Temperature
Symbol
VIN
VSW
VBS
VFB
VCOMP
VLED
Tj
TL
TSTG
VIN
TOPR
Ratings
22
-1~VIN+1
VSW+6
-0.3~VIN
-0.3~6
-0.3~VIN
150
260
-65~150
6~20
-40~125
Unit
V
V
V
V
V
V
°C
°C
°C
V
°C
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VIN=12V, Tamb=25°C)
Characteristics
Operating Current
Upper Switch Leakage
Current Limit
Maximum Duty Cycle
Oscillator Frequency
COMP Clamp Voltage
Switch Transistor on Resistance
Sampling Voltage Threshold
Symbol
IIN
IL
ILIM
Dmax
fosc
VCOMP
RONH
VFB－VLED
Test Condition
VFB≥3.5V
VSW=0V
VFB=0V
Open without load
Min.
1.3
--
250
1.9
--
--
Typ.
2.0
0
1.6
93
280
2.2
0.25
88
Max.
2.3
10
2.0
--
310
2.5
--
--
Unit
mA
μA
A
%
kHz
V
Ω
mV
PIN CONFIGURATION
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
Http://www.silan.com.cn
REV:1.4 2009.02.26
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