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PDF LR256 Data sheet ( Hoja de datos )
| Número de pieza | LR256 | |
| Descripción | White LED Step-Up Converter | |
| Fabricantes | LRC | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de LR256 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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LESHAN RADIO COMPANY, LTD.
LR256 White LED Step-Up Converter
LR256 is a step-up DC/DC converter
specifically designed to drive white LED with a
constant current. It can drive two,three,or four
LEDS. It switches at 1.2MHz and use tiny
external components. The output capacitor can
be as small as 0.22uF,which can save space
and cost versus alternative solutions. Feedback
¾ Fast 1.2MHz Switching Frequency
¾ Requires Only 0.22uF Output Capacitor
¾ Inherently Matched LED Current
¾ High Efficiency: 85% Typical
¾ 2.5V to 10V VIN ranges
¾ Drives Up to Four series LEDs with a Li-lon cell
¾ Uses Very Tiny Inductors
¾ SOT-25 Package
voltage is as low as 95mV.
Absolute maximum ratings
Parameter
Supply Voltage
Feedback Voltage
Switch Voltage
CE Voltage
Operating temperature range
Storage temperature range
Junction temperature
symbol
VIN
FB
SW
VCE
Topr
Rstg
Tj
value
10
10
20
10
-25 to +70
-55 to +150
125
unit
V
V
V
V
℃
℃
℃
Pin name
1
2
3
Description
Symbol
Description
Symbol
5
1：Switch
4
5：Supply
SW
Voltage
VIN
2：GND
GND
3：Feedback
FB 4：Start-Up
CE
1/8
1 page  
Figure
LESHAN RADIO COMPANY, LTD.
LR256
Iq Vs T
2.2
2.0
1.8
1.6
1.4 -50
1.2
1.0
100
0.8 25
0.6
0.4
0.2
0.0
0 2 4 6 8 10
Vin(V)
1.4
1.2
1
0.8
0.6
0.4
0.2
0
-25
Swich Frequency Vs T
0 25 50 75 100
T（°C）
5/8
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet LR256.PDF ] | |
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