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SD42511 Datenblatt(PDF) 2 Page - Silan Microelectronics Joint-stock

Teilenummer SD42511
Bauteilbeschribung  1A WHITE LED DRIVER WITH PWM DIMMING CONTROLLER
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Hersteller  SILAN [Silan Microelectronics Joint-stock]
Direct Link  http://www.silan.com.cn
Logo SILAN - Silan Microelectronics Joint-stock

SD42511 Datenblatt(HTML) 2 Page - Silan Microelectronics Joint-stock

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SD42511
HANGZHOU SILAN MICROELECTRONICS CO.,LTD
REV:1.3
2008.11.19
Http://www.silan.com.cn
Page 2 of 10
ABSOLUTE MAXIMUM RATING
Characteristics
Symbol
Ratings
Unit
Supply Voltage
VIN
28
V
Switch Voltage
VSW
-1~VIN+1
V
Boost Voltage
VBS
VSW+6
V
Feedback Voltage
VFB
-0.3~VIN
V
PWM Voltage
VPWM
-0.3~6
V
Comp Voltage
VCOMP
-0.3~6
V
LED Voltage
VLED
-0.3~VIN
V
Junction Temperature
Tj
150
°C
Lead Temperature
TL
260
°C
Storage Temperature
TSTG
-65~150
°C
Input Voltage
VIN
5~25
V
Operating Temperature
TOPR
-40~125
°C
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, VIN=12V, Tamb=25°C)
Characteristics
Symbol
Test Condition
Min.
Typ.
Max.
Unit
Operating Current
IIN
VFB
≥3.5V
2.0
2.3
mA
Upper Switch Leakage
IL
VSW=0V
0
10
μA
Current Limit
ILIM
1.3
1.6
2.0
A
Maximum Duty Cycle
Dmax
VFB=0V
--
93
--
%
Oscillator Frequency
fosc
250
280
310
kHz
PWM Dimming Threshold
Voltage
VPWMTH
1.2
1.5
1.8
V
PWM pull-down current
IPWM1
VPWM=5V
50
60
μA
PWM pull-up current
IPWM1
VPWM=0V
60
70
μA
COMP Clamp Voltage
VCOMP
Open without load
1.9
2.2
2.5
V
Switch Transistor on Resistance
RONH
--
0.25
--
Ω
Sampling Voltage Threshold
VFB－VLED
--
88
--
mV


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