UNISONIC TECHNOLOGIES CO., LTD UH378 LINEAR INTEGRATED CIRCUIT COMPLEMENTARY OUTPUTS HALL EFFECT LATCH IC DESCRIPTION The UTC UH378 is a Latch-Type Hall Effect sensor with built-in complementary output drivers. It’s composed of internal temperature compensation circuit and built-in protection diode to prevent reverse power fault. It is aimed for brush-less DC Fan. The outputs of the UH378 operate as the Hysteresis Characteristics. The Outputs alternately switch between ON and OFF when either the magnetic flux density is larger than threshold BOP or the magnetic flux density is lower than BRP. FEATURES * Widen Power Supply range from 3V ~ 20V. * On-chip Hall sensor with excellent hysteresis. * Build-in reverse protection diode. * TTL and MOS IC are directly drivable by the output * The life is semi permanent because it employs contact-less parts ORDERING INFORMATION Ordering Number Lead Free Halogen Free UH378L-G04-K UH378G-G04-K Package Packing SIP-4 Bulk PIN DESCRIPTION PIN NO. 1 2 3 4 PIN NAME VCC DO DOB VSS P/I/O P O O P DESCRIPTION Positive Power Supply Output Pin Output Pin Ground www.unisonic.com.tw Copyright © 2010 Unisonic Technologies Co., Ltd 1 of 6 QW-R118-012.A UH378 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 1 DO VCC 2 REG. Hall Sensor DOB 3 VSS 4 SENSOR LOCATIONS UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R118-012.A UH378 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATING (Ta=25℃) PARAMETER SYMBOL RATINGS UNIT Supply Voltage VCC 20 V Reverse VCC Polarity Voltage VRCC -25 V Circuit Current IO 20 mA Magnetic flux density B Unlimited Power Dissipation PD 500 mW Junction Temperature TJ +150 ℃ Operating Temperature TOPR -20 ~ +85 ℃ Storage Temperature TSTG -65 ~ +150 ℃ 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. ELECTRICAL CHARACTERISTICS (Ta =25℃, unless otherwise specified) PARAMETER SYMBOL Low-Level Output Voltage VOL Output Leakage Current ICEX Supply Current ICC Output Switching Time tR tF TEST CONDITIONS VCC = 14V, IOUT=5mA VCC = 3.6V, IOUT=5mA VCC =14V VCC =14V MIN - VCC =3.6V VCC =14V, RL=10KΩ, CL=10pF VCC =14V, RL=10KΩ, CL=10pF - TYP MAX UNIT 0.5 0.7 V 0.4 0.7 1 10 uA 4.7 5 mA 4.6 5 - 5 2 us MAGNETIC CHARACTERISTICS A grade PARAMETR SYMBOL BOP BRP BHYS MIN 5 -50 20 TYP MAX 50 -5 100 UNIT G G G PARAMETR SYMBOL BOP BRP BHYS MIN 5 -70 20 TYP MAX 70 -5 140 UNIT G G G PARAMETR SYMBOL BOP BRP BHYS MIN TYP MAX 100 UNIT G G G Operate Point Release Point Hysteresis B grade Operate Point Release Point Hysteresis C grade Operate Point Release Point Hysteresis UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw -100 20 200 3 of 6 QW-R118-012.A UH378 LINEAR INTEGRATED CIRCUIT TEST CIRCUIT 14V UTC UH378 DO RL1 10kΩ RL2 10kΩ CL1 10pF CL2 10pF CHYSTERESIS CHARACTERISTICS Output Voltage in Volts Output Voltage in Volts DOB UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R118-012.A UH378 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 1N45 1N45 10K 10K UH378 15V 4.7u/400V 680 4.7u/400V 1K 2W TYPICAL APPLICATION CIRCUIT 220 V LINEAR INTEGRATED CIRCUIT 5 of 6 QW-R118-012.A UH378 LINEAR INTEGRATED CIRCUIT PERFORMANCE CHARACTERISTICS Ta(℃) PD (mW) 25 550 50 525 60 515 70 505 80 485 85 475 90 465 95 455 100 445 105 425 110 405 115 385 120 365 Typical Magnetic Switch Point vs.Supply Voltage 75 BHYS 50 BOP 25 0 BRP -25 5 12 24 20 Supply Voltage (V) Ta=-80℃ Ta=25℃ Ta=-20℃ 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 6 of 6 QW-R118-012.A