L5100G-AF5-R [UTC]
WHITE LED STEP-UP CONVERTER; 白光LED升压转换器
| 型号： | L5100G-AF5-R |
| 厂家： | 
Unisonic Technologies |
| 描述： | WHITE LED STEP-UP CONVERTER |
| 文件： | 总7页 (文件大小：294K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
UNISONIC TECHNOLOGIES CO., LTD
L5100
LINEAR INTEGRATED CIRCUIT
WHITE LED STEP-UP
CONVERTER
DESCRIPTION
The UTC L5100 is a STEP-UP DC/DC Converter and
designed
for driving white LEDs with a constant current. It can drive several LEDs
in series by a Li-Ion cell. UTC L5100 switches at a high frequency
1.2MHz, so it can allow the use of tiny external components. The output
capacitor can be as small as 0.22μF; saving space and cost compare
with alternative other solutions. The low 95mV feedback voltage
minimizes power loss in the current setting resistor can have better
efficiency.
FEATURES
* Inherently Matched LED Current
* High Efficiency: 83% Typical
* Drives Up to Four LEDs from a 3.2V Supply
* Drives Up to Six LEDs from a 5V Supply
* 36V Rugged Bipolar Switch
* 1.2MHz Switching Frequency
* Uses Tiny 1mm Tall Inductors
* Output Capacitor can be Small to only 0.22μF
ORDERING INFORMATION
Ordering Number
Package
SOT-25
Packing
Lead Free
Halogen Free
L5100G-AF5-R
L5100L-AF5-R
Tape Reel
MARKING
www.unisonic.com.tw
Copyright © 2011 Unisonic Technologies Co., LTD
1 of 7
QW-R103-024.D
L5100
LINEAR INTEGRATED CIRCUIT
PIN CONFIGURATION
PIN DESCRIPTION
PIN NO.
PIN NAME
SW
DESCRIPTION
1
2
Switch. Connect inductor/diode here. Minimize trace area at this pin to reduce EMI.
Ground. Connect directly to local ground plane.
GND
Feedback. Reference voltage is 95mV. Connect cathode of lowest LED and resistor
here. Calculate resistor value according to the formula: RFB = 95mV/ILED
3
FB
4
5
Shutdown. Connect to 1.5V or higher to enable device; 0.4V or less to disable device.
Input Supply Pin. Must be locally bypassed.
SHDN
VIN
UNISONIC TECHNOLOGIES CO., LTD
2 of 7
QW-R103-024.D
www.unisonic.com.tw
L5100
LINEAR INTEGRATED CIRCUIT
BLOCK DIAGRAM
UNISONIC TECHNOLOGIES CO., LTD
3 of 7
QW-R103-024.D
www.unisonic.com.tw
L5100
LINEAR INTEGRATED CIRCUIT
ABSOLUTE MAXIMUM RATINGS
PARAMETER
SYMBOL
VIN
RATINGS
12
UNIT
V
Input Voltage
Switch Voltage
VSW
36
V
Feedback Voltage
VFB
12
V
VSHDN
Shutdown Voltage
12
V
Junction Temperature
Operating Junction Temperature
Storage Temperature Range
TJ
TJ
+125
-40~+85
-65~+150
°C
°C
°C
TSTG
Note: 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.
THERMAL DATA
PARAMETER
SYMBOL
RATINGS
256
UNIT
°C/W
Junction to Ambient (in free air)
θJA
ELECTRICAL CHARACTERISTICS (TA=25°C, VIN=3V, VSHDN =3V, unless otherwise specified.)
PARAMETER
SYMBOL
VIN
TEST CONDITIONS
MIN
2.5
87
TYP
MAX
12
UNIT
V
Operating Voltage
Feedback Voltage
Shutdown Voltage ON
Shutdown Voltage OFF
Switch VCESAT
VFB
ISW=100mA, Duty Cycle=66%
95
104
mV
V
VON
1.5
VOFF
0.3
V
VCESAT(SW) ISW=250mA
ISW
360
320
1.8
0.1
0.01
60
mV
mA
mA
µA
µA
µA
nA
MHz
%
Switch Current Limit
2.5
1.0
5
Supply current
ICC
SHDN =0V
VSW=5V
Switch Leakage Current
Shutdown Pin Bias Current
Feedback Pin Bias Current
Switching Frequency
ISW(OFF)
ISHDN
IFB
fOSC
DC
10
0.8
85
45
100
1.6
1.2
90
Maximum Duty Cycle
UNISONIC TECHNOLOGIES CO., LTD
4 of 7
QW-R103-024.D
www.unisonic.com.tw
L5100
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUITS
UNISONIC TECHNOLOGIES CO., LTD
5 of 7
QW-R103-024.D
www.unisonic.com.tw
L5100
LINEAR INTEGRATED CIRCUIT
TYPICAL APPLICATION CIRCUITS (Cont.)
Seven LED Efficiency
85
80
75
70
L=22μH
D
V IN
5 V
CIN
1µF
VDC
DIMMING
COUT
0. 22µF
VIN
SW
FB
90k
5k
SHDN
GND
R1
4Ω
5
V to Seven White LEDs
65
1
0
1
5
0
5
LOAD CURRENT (mA)
UNISONIC TECHNOLOGIES CO., LTD
6 of 7
QW-R103-024.D
www.unisonic.com.tw
L5100
LINEAR INTEGRATED CIRCUIT
TYPICAL CHARACTERISTICS
Quiescent Current
25
Current Limit vs Duty Cycle
350
300
250
2.2
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
80
200
150
100
50
4
0.
0.2
0
0
20
60
80
100
0
40
2
4
6
8
10
0
(%)
VIN (V)
DUTY CYCLE
* UTC L5100 is guaranteed the operating temperature
range of 0°C ~ 75°C.
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
7 of 7
QW-R103-024.D
www.unisonic.com.tw
相关型号：
©2020 ICPDF网 联系我们和版权申明