Datasheet

UNISONIC TECHNOLOGIES CO., LTD
L3080
Preliminary
CMOS IC
30V/800mA INTEGRATED
POWER LED DRIVER

1
DESCRIPTION
The UTC L3080 is a continuous conduction mode inductive
step-down converter, designed for driving single or multiple series
connected LEDs. Using a few external components.
The UTC L3080 has a build-in power switch, based on different
input voltage, The UTC L3080 can drive several 1W or 3W LEDs.
The device has the function of thermal shutdown protection and
LED short-circuit/open-circuit protection.

SOT-89-5
FEATURES
* Up to 800mA output current
* High efficiency (up to 97%)
* Wide input voltage range: 5V~30V
* Typical ±5% output current accuracy
* Single DIM pin on/off and brightness control using DC voltage or
PWM signal
* LED open-circuit protection
* LED short-circuit protection
* Internal thermal shutdown protection.
* Adjustable Constant LED Current

ORDERING INFORMATION
Ordering Number
L4120G-AB5-R
Package
SOT-89-5
Packing
Tape Reel
L3080L-AB5-R

(1)Packing Type
(1) R: Tape Reel
(2)Package Type
(2) AB5: SOT-89-5
(3)Green Package
(3) G: Halogen Free and Lead Free
MARKING
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Copyright © 2016 Unisonic Technologies Co., Ltd
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L3080
Preliminary

PIN CONFIGURATION
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PIN DESCRIPTION
PIN NO.
1
2
3
4
5

PIN NAME
CS
GND
DIM
SW
VIN
CMOS IC
DESCRIPTION
Current sense input
Signal and power ground
Enable switch, analog and PWM dimming input.
Switch output.
Input supply pin.
BLOCK DIAGRAM
+
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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
Preliminary
CMOS IC
ABSOLUTE MAXIMUM RATING (TA=25°C, unless specified otherwise)
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage
VIN
40
V
Drain Voltage of the Internal Power Switch
SW
40
V
Current Sense Input (Respect to VIN)
CS
-6.0
V
Logic Level Dimming Input
DIM
-0.3 ~ 6
V
Switch Output Current
ISW
1
A
Power Dissipation
PD
0.8
W
Operation Junction Temperature Range
TJ
-40 ~ +150
°C
Storage Temperature
TSTG
-55 ~ +150
°C
Notes: 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. Human body model, 100pF capacitor discharged through a 1.5kΩ resistor.

THERMAL DATA
PARAMETER
Junction to Ambient

SYMBOL
θJA
RATINGS
160
UNIT
°C/W
ELECTRICAL CHARACTERISTICS (Note 1, 2)
(The following specifications apply for VIN=12V, TA=25°C, unless specified otherwise.)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP MAX
Input Voltage
VIN
5
30
Under Voltage Lock Out
VUVLO
VIN Falling
4.7
UVLO Hysteresis
VUVLO, HYS VIN Rising
100
CURRENT SENSE
Mean Current Sense Threshold Voltage
VCS
VIN-VCS
100
Sense Threshold Hysteresis
VCS_HYS
±15
OPERATING FREQUENCY
Maximum Operation Frequency
FSW
1
OPERATING CURRENT
Quiescent Supply Current with Output Off
IOFF
VDIM<0.3V
60
DIM INPUT
Internal Supply Voltage
VDIM
DIM Floating
5
DIM Input Voltage High
VDIM_H
2.5
DIM Input Voltage Low
VDIM_L
0.1
DIM Pull Up Resistor to Internal Supply Voltage
RDIM
150
DIM BRIGHTNESS DIMMER
DC Brightness Control Range
VDIM_DC
0.5
2.5
Duty Cycle Range of Low Frequency Dimming
DPWM_LF
3000:1
Duty Cycle Range of High Frequency Dimming
DPWM_HF
10:1
OUTPUT POWER SWITCH
SW On Resistance
RSW
0.6
Continuous SW Current
ISWmean
0.8
SW Leakage Current
ILEAK
0.5
5
THERMAL SHUTDOWN
Thermal Shutdown Threshold
TSD
150
Thermal Shutdown hysteresis
TSD-hys
20
Notes: 1. Typical parameters are measured at 25˚C and represent the parametric norm.
2. Datasheet min/max specification limits are guaranteed by design, test, or statistical analysis.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
UNIT
V
V
mV
mV
%
MHz
μA
V
V
V
KΩ
V
Ω
A
µA
°C
°C
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
Preliminary
CMOS IC
TYPICAL APPLICATION CIRCUIT
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
www.unisonic.com.tw
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