UNISONIC TECHNOLOGIES CO., LTD UH277 LINEAR INTEGRATED CIRCUIT COMPLEMENTARY OUTPUTS HALL EFFECT LATCH IC DESCRIPTION The UTC UH277 is a Latch-Type Hall Effect sensor with built-in complementary output drivers. It’s designed with internal temperature compensation circuit and built-in protection diode prevent reverse power fault. The application is aimed for brush-less DC Fan The UH277 Outputs operate as the Hysteresis Characteristics. The Outputs alternately ON and OFF when either the magnetic flux density larger than threshold BOP or the magnetic flux density lower than BRP. FEATURES * Widen Power Supply range from 3V ~ 20V. * On-chip Hall sensor with excellent hysteresis. * Open Collector outputs had the sinking capability up to 300mA. * Output Clamping Diodes reduce the peak output voltages during switching. * Build-in reverse protection diode. ORDERING INFORMATION Ordering Number UH277G-G04-K Package SIP-4 Packing Bulk MARKING www.unisonic.com.tw Copyright © 2015 Unisonic Technologies Co., Ltd 1 of 5 QW-R118-003.G UH277 LINEAR INTEGRATED CIRCUIT PIN DESCRIPTION PIN NO. PIN NAME 1 VCC 2 DO 3 DOB 4 VSS P/I/O P O O P DESCRIPTION Positive Power Supply Output Pin Output Pin Ground 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 5 QW-R118-003.G UH277 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (TA=25°C, unless otherwise specified) PARAMETER Supply Voltage Reverse VCC Polarity Voltage Output OFF Voltage Magnetic flux density Continuous Output ON Current Hold Peak (Start Up) Power Dissipation Junction Temperature Operating Temperature Storage Temperature Note 1: Output Zener protection voltage RATINGS 20 -25 32 Unlimited 0.3 0.4 0.7 500 +150 -20 ~ +85 -65 ~ +150 IC PD TJ TOPR TSTG UNIT V V V A mW °C °C °C ELECTRICAL CHARACTERISTICS (TA =25°C, unless otherwise specified) PARAMETER Low Supply Voltage Supply Voltage Output Saturation Voltage Output Leakage Current Supply Current Output Rise Time Output Falling Time Switch Time Differential SYMBOL VCC VRCC VCE B SYMBOL VCE VCC VCE(SAT) ICEX ICC tR tF ∆t TEST CONDITIONS VCC=3.5V, IL=100mA MIN TYP 3 VCC=14V, IL=300mA VCE=14V, VCC=14V VCC=20V, Output Open VCC=14V, RL=820Ω, CL=20pF VCC=14V, RL=820Ω, CL=20pF VCC=14V, RL=820Ω, CL=20pF 0.3 <0.1 15 0.3 0.04 0.3 MAX 0.6 20 0.6 10 25 3 1 3 UNIT V V V μA mA μS μS μS 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 5 QW-R118-003.G UH277 CHYSTERESIS CHARACTERISTICS Output Voltage in Volts Output Voltage in Volts LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT TEST CIRCUIT 14V UH277 DO RL1 820Ω RL2 820Ω CL1 20pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw DOB CL2 20pF 4 of 5 QW-R118-003.G UH277 LINEAR INTEGRATED CIRCUIT PERFORMANCE CHARACTERISTICS TA(°C) 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 20 24 Supply Current (mA) Supply Voltage (V) 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 5 of 5 QW-R118-003.G