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부품번호 | L5101 기능 |
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기능 | WHITE LED STEP-UP CONVERTER | ||
제조업체 | Unisonic Technologies | ||
로고 | |||
전체 9 페이지수
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
1 of 9
QW-R103-026,A
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 Ω
0.1 1 µA
1.5 V
0.3 V
0.6 1.2 1.8 MΩ
22 27 32 V
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 9
QW-R103-026,A
4페이지 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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구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
L5100 | WHITE LED STEP-UP CONVERTER | Unisonic Technologies |
L5101 | WHITE LED STEP-UP CONVERTER | Unisonic Technologies |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |