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AP1521 데이터시트(PDF) 3 Page - Anachip Corp

부품명 AP1521
상세설명  White LED Step-Up Converter
PDF  8 Pages
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제조업체  ANACHIP [Anachip Corp]
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AP1521 데이터시트(HTML) 3 Page - Anachip Corp

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AP1521
White LED Step-Up Converter
Anachip Corp.
www.anachip.com.tw
Rev. 0.1 Apr. 27, 2004
3/8
Electrical Characteristics (T
a=25°C, VIN = 3V, VSHDN = 3V, unless otherwise noted.)
Symbol
Parameter
Conditions
Min.
Typ.
Max.
Unit
VIN
Minimum Operation Voltage
-
2.5
--
--
V
VIN
Maximum Operation Voltage
-
--
--
10
V
VFB
Feedback Pin Voltage
-
280
310
340
mV
IFB
Feedback Pin Bias Current
-
10
45
100
nA
--
1.9
2.5
mA
Supply Current
VSHDN = 0V
--
0.1
1.0
µA
FSW
Switching frequency
0.75
1.0
1.25
MHz
Duty
PWM Maximum Duty Cycle
85
90
--
%
ISW
Switch Current Limit
--
320
--
mA
VSAT
Switch VSAT
ISW = 250mA
--
350
--
mV
Switch Leakage Current
VSW = 5V
--
0.01
5
µA
VSHDN SHDN Pin Voltage High
Enable
1.5
--
--
V
VSHDN SHDN Pin Voltage Low
Disable
--
--
0.4
V
ISHDN SHDN Pin Bias Current
--
65
--
µA
Typical Application Circuit
Vin
SW
Vss
FB
SHDN
ON OFF
C1
1uF
LED1
LED2
LED3
C2
0.22uF
R1
20ohm
15mA
L1
22uH
D1
C1, C2: X5R or X7R Dielectric
D1: Central Semiconductor CMDSH-3
L1: MURATA LQH3C-220 or Equivalent
Figure 1.



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