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 *Pb-free plating product number: L2044L * 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 PIN DESCRIPTION PIN No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 PIN FUNCTION NAME OSC Oscillator SIL Start input left SIR Start input right Start input hazard SIHW warning VS VCC CR1 Control input relay 1 CR2 Control input relay 2 LD Lamp failure detection VS VCC GND ground OR1 Output relay 1 VS VCC OR2 Output relay 2 OSC Oscillator ORDERING INFORMATION Order Number Normal Lead free L2044-D14-T L2044L-D14-T L2044-S14-R L2044L-S14-R L2044-S14-T L2044L-S14-T Package Packing DIP-14 SOP-14 SOP-14 Tube Tape Reel Tube www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., LTD 1 QW-R121-001.A L2044 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION BLOCK DIAGRAM Vcc 9 5 C1 4.7μF R1 82KΩ K1 Vcc-81mV + - 8 Contast 1 + - 14 VRef1 + - 1 + - + Vcc-6V 27.5V 11 Relay 1 2 R9 47KΩ 7 R8 47KΩ Vcc/2 VRef2 12 3 Hazard warning 2 Vcc 4 R3 4.7KΩ R4 4.7KΩ R6 4.7KΩ R5 1.2KΩ R7 1.2KΩ UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 2 + 13 GND 10 R2 200Ω Vcc RShunt 30mΩ R10 1.2KΩ right Vstart left GND 2 QW-R121-001.A L2044 LINEAR INTEGRATED CIRCUIT ABSOLUATE MAXIUM RATINGS PARAMETER Supply Voltage, 1 min, pins 5, 9 and 12 Junction Temperature Operating Temperature Storage Temperature RATINGS UNIT 24 V ℃ +125 ℃ -20 ~ +85 ℃ -40 ~ +150 DIP-14 90 θJA ℃/W Thermal Resistance Junction to Ambient SOP-14 120 Note 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.The device is guaranteed to meet performance specification within 0℃~70℃ operating temperature range and assured by design from –20℃~85℃. SYMBOL VCC TJ TOPR TSTG ELECTRICAL CHARACTERISTICS (VCC = 12V, Ta =25℃, unless otherwise specified.) PARAMETER Supply Voltage Range SYMBOL TEST CONDITIONS VCC Pins 5, 9, 12 VCC=8V VCC=12V Saturation Voltage VOUT Clamping Voltage Relay output overvoltage detection (relay disabled) V12 V12 Control signal threshold VCC Output current for relay driver Relay output reverse current Supply current, switches open Relay coil resistance Start delay IOUT IOUT ICC RL tON Tolerance of control signal threshold Temperature coefficient of control signal Threshold TCVO MIN 8 TYP 25.0 18 27.5 20 70.6 85.5 93.0 RL=82Ω Ta= -20℃ ~ 85℃ Ta= -20℃ ~ 85℃ VCC=9V VCC=13.5V VCC=16V Pins 11, 13 Pins 11, 13 Pins 5, 9, 12 First bright phase VCC=9V~16V, Pin 8, Ta= -20℃ ~ 85℃ VCC=13.5V, Pin 8 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℃, unless otherwise specified.) PARAMETER Frequency determining resistor Frequency determining capacitor SYMBOL R1 C1 Frequency tolerance Bright period Frequency increase Lamp load △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 MIN 6.8 TYP MAX UNIT 510 kΩ 47 μF -5 +5 47 37 2.15×f1 1 53 45 2.3×f1 % % Hz W 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 3 QW-R121-001.A