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L5101 데이터시트 PDF




Unisonic Technologies에서 제조한 전자 부품 L5101은 전자 산업 및 응용 분야에서
광범위하게 사용되는 반도체 소자입니다.


 

PDF 형식의 L5101 자료 제공

부품번호 L5101 기능
기능 WHITE LED STEP-UP CONVERTER
제조업체 Unisonic Technologies
로고 Unisonic Technologies 로고


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L5101 데이터시트, 핀배열, 회로
UNISONIC TECHNOLOGIES CO., LTD
L5101
LINEAR INTEGRATED CIRCUIT
WHITE LED STEP-UP
CONVERTER
DESCRIPTION
The UTC L5101 is a fixed frequency step-up PWM DC/DC
converter and designed for white LEDS driving with a constant
current to provide backlight in handheld devices. The device
switches at a high frequency 1.2MHz by an internal N-channel
MOSFET switch to be capable of minimum external components
using.
The UTC L5101 can drive up to 5 LEDs in series by a Li-Ion cell.
Series connection of LEDS provides identical LED currents
resulting in uniform brightness without ballast resistors. The low
95mV feedback voltage minimizes power loss in the current setting
resistor can have better efficiency.
FEATURES
* Built-In Open Circuit Protection
* Built-In Over Voltage Protection
* High Efficiency(Up to 84% at VIN=4.2V, 3 LEDs, ILEwDw=w.2Da0tamSheAet)4U.com
* 1.2MHz fixed switching frequency
* Low supply current: 70µA
* Matches LED current
* Requires tiny inductor and capacitors
4
5
6
3
2
1
SOT-26
*Pb-free plating product number: L5101L
ORDERING INFORMATION
Order Number
Normal
Lead Free Plating
L5101-AG6-R
L5101L-AG6-R
Package
SOT-26
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2005 Unisonic Technologies Co., Ltd
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QW-R103-026,A




L5101 pdf, 반도체, 판매, 대치품
L5101
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
SW Voltage
VIN 6 V
VSW 33 V
FB Voltage
SHDN Voltage
VFB
VSHDN
6
6
V
V
OVP Voltage
Junction Temperature
VOVP
TJ
34
+125
V
Operating Temperature Range
Storage Temperature Range
TOPR
TSTG
0 ~ +70
-40 ~ +150
Note 1. Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
2. The device is guaranteed to meet performance specification within 0 ~ +70 operating temperature range
and assured by design from –20 ~ +85 .
ELECTRICAL CHARACTERISTICS (VSHDN=3V, VIN=3V, Ta=25 , unless otherwise specified.)
PARAMETER
Operating Voltage
Supply Current
ERROR AMPLIFIER
Feedback Voltage
FB Input Bias Current
OSCILLATOR
Switching Frequency
Maximum Duty Cycle
POWER SWITCH
SW ON Resistance
Switch Leakage Current
CONTROL INPUT
Shutdown Voltage
High
Low
OVER VOLTAGE PROTECTION
OVP Input Resistance
OVP Threshold
SYMBOL
TEST CONDITIONS
VIN
Switching
IIN Non switching
VSHDN=0V
VFB
IFB VFB=95mV
fSW
DC
RON(SW)
ILEAK (SW)) VSW=33V
VIH(SHDN) ON
VIL(SHDN) OFF
RIN(OVP)
VTHR(OVP) 1V Hysteresis typical
MIN TYP MAX UNIT
2.5 5.5 V
1 5 mA
70
0.1
100
1.0
µA
85 95 105 mV
1 nA
0.8 1.2 1.6 MHz
85 90
%
1.4 5
0.1 1 µA
1.5 V
0.3 V
0.6 1.2 1.8 M
22 27 32 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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L5101 전자부품, 판매, 대치품
L5101
LINEAR INTEGRATED CIRCUIT
APPLICATION INFORMATION(Cont.)
2. Using a DC Voltage
VIN
C1
1F
L
10 H
D1
VIN SW
RB521S-30
SHDN OVP
GND
FB
L5101
VDC
0~5V
R2
51K
R1
1K
RFB
4.7
C2
1F
Fig.3 Dimming Control Using a DC Voltage
3. Using a Filtered PWM Signal
VIN
C1
1F
L
10 H
D1
VIN
SHDN
SW
OVP
GND
FB
L5101
RB521S-30
R3
5.1K
PWM
C3
0.1 F
R1
1K
R2
51K
RFB
4.7
Fig.4 Dimming Control Using a Filter PWM Signal
C2
1F
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
7 of 9
QW-R103-026,A

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