UNISONIC TECHNOLOGIES CO., LTD
L2044
DUAL OUTPUT FLASHER
DESCRIPTION
LINEAR INTEGRATED CIRCUIT
The UTC
L2044
is a dual output stages flasher designed as a
relay driver for flashing light control in automotive applications.
Both sides direction indicator input with only a small control current
makes switch contacts for small loads possible. Each side of the
vehicle is controlled separately.
The construction of the hazard switch could be simplified due to
hazard warning input is separate. The flasher will dramatically
increase the flash frequency by a typical ratio of 2:1 if lamp fault is
detected. The UTC
L2044
can be directly connected to the battery
due to extreme low current consumption.
FEATURES
* Temperature and Supply Voltage Compensated Flashing
Frequency
* Frequency Doubling Indicates Lamp Fault.
* Two Relay Driver Outputs with High Current-carrying Capacity
and Low Saturation Voltage
* Minimum Lamp Load for Flasher Operation:
≥
1W
* Very Low Sensitivity to EMI
* Extremely Low Current Consumption<10μA ( at Switches Open)
* Reverse Polarity Protection
* Three Control Inputs: Left, Right and Hazard Warning
ORDERING INFORMATION
Ordering Number
Lead Free
L2044L-D14-T
-
Halogen Free
L2044G-D14-T
L2044G-S14-R
Package
DIP-14
SOP-14
Packing
Tube
Tape Reel
MARKING
DIP-14
SOP-14
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Copyright © 2015 Unisonic Technologies Co., Ltd
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QW-R121-001.C
L2044
PIN CONFIGURATION
LINEAR INTEGRATED CIRCUIT
PIN DESCRIPTION
PIN No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIN NAME
OSC
SIL
SIR
SIHW
V
CC
CR1
CR2
LD
V
CC
GND
OR1
VS
OR2
OSC
FUNCTION
Oscillator
Start input left
Start input right
Start input hazard warning
V
CC
Control input relay 1
Control input relay 2
Lamp failure detection
V
CC
ground
Output relay 1
V
CC
Output relay 2
Oscillator
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www.unisonic.com.tw
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QW-R121-001.C
L2044
BLOCK DIAGRAM
LINEAR INTEGRATED CIRCUIT
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www.unisonic.com.tw
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QW-R121-001.C
L2044
ABSOLUATE MAXIUM RATINGS
LINEAR INTEGRATED CIRCUIT
PARAMETER
SYMBOL
RATINGS
UNIT
Supply Voltage, 1 min, pins 5, 9 and 12
V
CC
24
V
Junction Temperature
T
J
+125
°C
Operating Temperature
T
OPR
-20~ +85
°C
Storage Temperature
T
STG
-40 ~ +150
°C
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
DIP-14
SOP-14
θ
JA
RATINGS
90
120
UNIT
°C/W
Junction to Ambient
ELECTRICAL CHARACTERISTICS
(V
CC
= 12V, T
A
=25°C, unless otherwise specified.)
SYMBOL TEST CONDITIONS
V
CC
Pins 5, 9, 12
V
CC
=8V, R
L
=82Ω
V
OUT
V
CC
=12V, R
L
=82Ω
V
12
T
a
= -20°C ~ 85°C
V
12
T
a
= -20°C ~ 85°C
V
CC
=9V
V
CC
V
CC
=13.5V
V
CC
=16V
I
OUT
Pins 11, 13
I
OUT
Pins 11, 13
I
CC
Pins 5, 9, 12
R
L
t
ON
First bright phase
V
CC
=9V~16V, Pin 8,
T
A
= -20°C ~ 85°C
T
C
V
O
V
CC
=13.5V, Pin 8
MIN
8
TYP
MAX UNIT
18
V
1.0
V
1.2
30.0
V
22
V
mV
PARAMETER
Supply Voltage Range
Saturation Voltage
Clamping Voltage
Relay output overvoltage detection (relay disabled)
Control signal threshold
Output current for relay driver
Relay output reverse current
Supply current, switches open
Relay coil resistance
Start delay
Tolerance of control signal threshold
Temperature coefficient of control signal Threshold
25.0
18
27.5
20
70.6
85.5
93.0
300
0.1
10
10
-6
10
+6
mA
mA
μA
Ω
ms
%
μV/K
TOLERANCES
(V
CC
= 12V, T
A
=25°C, unless otherwise specified.)
SYMBOL
R
1
C
1
△f
1
△f
1
△f
2
f
2
P
L
TEST CONDITIONS
MIN
6.8
-5
47
37
2.15×f
1
PARAMETER
Frequency determining resistor
Frequency determining capacitor
Frequency tolerance
Bright period
Frequency increase
Lamp load
TYP
MAX
510
47
+5
53
45
2.3×f
1
UNIT
kΩ
μF
%
%
Hz
W
Normal flashing, basic frequency f
1
excluding the tolerance of R
1
and C
1
Basic frequency f
1
Control frequency f
2
Lamp failure
1
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www.unisonic.com.tw
4 of 5
QW-R121-001.C
L2044
TYPICAL APPLICATION CIRCUIT
LINEAR INTEGRATED CIRCUIT
UTC assum es no responsibility for equipm ent failures that result from using products at values that
exceed, even m om entarily, rated values (such as m axim um ratings, operating condition ranges, or
other param eters) 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 system s where
m alfunction 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 inform ation
presented in this docum ent does not form part of any quotation or contract, is believed to be accurate
and reliable and m ay be changed without notice.
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www.unisonic.com.tw
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QW-R121-001.C
嵌入式系统
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