UNISONIC TECHNOLOGIES CO., LTD

L2044

LINEAR INTEGRATED CIRCUIT

www.unisonic.com.tw

1

Copyright © 2005 Unisonic Technologies Co., LTD

QW-R121-001.A

DUAL OUTPUT FLASHER

DESCRIPTION

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

*Pb-free plating product number: L2044L

PIN DESCRIPTION

PIN

No.

PIN

NAME

FUNCTION

1

OSC

Oscillator

2

SIL

Start input left

3

SIR

Start input right

4

SIHW

Start input hazard

warning

5

VS

6

CR1

Control input relay 1

7

CR2

Control input relay 2

8

LD

Lamp failure detection

9

VS

10

GND ground

11

OR1

Output relay 1

12

VS

13

OR2

Output relay 2

14

OSC

Oscillator

ORDERING INFORMATION

Order Number

Normal

Lead free

Package

Packing

L2044-D14-T

L2044L-D14-T

DIP-14

Tube

L2044-S14-R

L2044L-S14-R

SOP-14

Tape Reel

L2044-S14-T

L2044L-S14-T

SOP-14

Tube