UNISONIC TECHNOLOGIES CO., LTD L2044 LINEAR INTEGRATED CIRCUIT 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 ORDERING INFORMATION Ordering Number Lead Free L2044L-D14-T - Halogen Free L2044G-D14-T L2044G-S14-R Package Packing DIP-14 SOP-14 Tube Tape Reel MARKING DIP-14 www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd SOP-14 1 of 5 QW-R121-001.C L2044 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION PIN DESCRIPTION PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN NAME OSC SIL SIR SIHW VCC CR1 CR2 LD VCC GND OR1 VS OR2 OSC FUNCTION Oscillator Start input left Start input right Start input hazard warning VCC Control input relay 1 Control input relay 2 Lamp failure detection VCC ground Output relay 1 VCC Output relay 2 Oscillator UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R121-001.C L2044 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R121-001.C L2044 LINEAR INTEGRATED CIRCUIT ABSOLUATE MAXIUM RATINGS PARAMETER SYMBOL RATINGS UNIT Supply Voltage, 1 min, pins 5, 9 and 12 VCC 24 V Junction Temperature TJ +125 °C Operating Temperature TOPR -20~ +85 °C Storage Temperature TSTG -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 Junction to Ambient SYMBOL DIP-14 SOP-14 UNIT °C/W ELECTRICAL CHARACTERISTICS (VCC = 12V, TA =25°C, unless otherwise specified.) 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 θJA RATINGS 90 120 SYMBOL TEST CONDITIONS VCC Pins 5, 9, 12 VCC=8V, RL=82Ω VOUT VCC=12V, RL=82Ω V12 Ta= -20°C ~ 85°C V12 Ta= -20°C ~ 85°C VCC=9V VCC VCC=13.5V VCC=16V IOUT Pins 11, 13 IOUT Pins 11, 13 ICC Pins 5, 9, 12 RL tON First bright phase VCC=9V~16V, Pin 8, TA= -20°C ~ 85°C TCVO VCC=13.5V, Pin 8 MIN 8 TYP 25.0 18 27.5 20 70.6 85.5 93.0 MAX UNIT 18 V 1.0 V 1.2 30.0 V 22 V mV 300 0.1 10 -6 10 mA mA μA Ω ms +6 % 10 μV/K TOLERANCES (VCC = 12V, TA =25°C, unless otherwise specified.) PARAMETER Frequency determining resistor Frequency determining capacitor Frequency tolerance Bright period Frequency increase Lamp load SYMBOL R1 C1 △f1 △f1 △f2 f2 PL TEST CONDITIONS Normal flashing, basic frequency f1 excluding the tolerance of R1 and C1 Basic frequency f1 Control frequency f2 Lamp failure UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw MIN 6.8 MAX 510 47 UNIT kΩ μF -5 +5 % 47 37 53 45 2.3×f1 2.15×f1 1 TYP % Hz W 4 of 5 QW-R121-001.C L2044 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION 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. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 5 QW-R121-001.C