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| UNISONIC TECHNOLOGIES CO., LTD UH277 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. LINEAR INTEGRATED CIRCUIT 1 SIP-4 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. *Pb-free plating product number: UH277L ORDERING INFORMATION Order Number Normal Lead Free Plating UH277-G04-K UH277L-G04-K Package SIP-4 Packing Bulk UH277L-G04-K (1)Packing Type (2)Package Type (3)Lead Plating (1) B: Bulk (2) G04: SIP-4 (3) L: Lead Free Plating, Blank: Pb/Sn 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 www.unisonic.com.tw Copyright (c) 2005 Unisonic Technologies Co., Ltd 1 of 6 QW-R118-003,C UH277 BLOCK DIAGRAM LINEAR INTEGRATED CIRCUIT 1 VCC DO 2 REG. Hall Sensor DOB 3 VSS 4 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R118-003,C UH277 ABSOLUTE MAXIMUM RATINGS (Ta=25 ) PARAMETER Supply Voltage Reverse VCC Polarity Voltage Output OFF Voltage Magnetic flux density Output ON Current Power Dissipation Junction Temperature Operating Temperature Storage Temperature Note 1: Output Zener protection voltage Continuous Hold Peak (Start Up) LINEAR INTEGRATED CIRCUIT SYMBOL VCC VRCC VCE B IC PD TJ TOPR TSTG RATINGS 20 -25 32 Unlimited 0.3 0.4 0.7 500 +150 -20 ~ +85 -65 ~ +150 UNIT V V V A mW ELECTRICAL CHARACTERISTICS (Ta =25 , 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 VCE VCC VCE(SAT) ICEX ICC tR tF t TEST CONDITIONS VCC=3.5V, IL=100mA VCC=14V, IL=300mA VCE=14V, VCC=14V VCC=20V, Output Open VCC=14V, RL=820, CL=20pF VCC=14V, RL=820, CL=20pF VCC=14V, RL=820, CL=20pF MIN 3 0.3 <0.1 15 0.3 0.04 0.3 TYP 0.4 MAX 20 0.6 10 25 3 1 3 UNIT V V V A mA S S S MAGNETIC CHARACTERISTICS A grade PARAMETR Operate Point Release Point Hysteresis SYMBOL BOP BRP BHYS Min. 5 -50 20 Typ. Max. 50 -5 100 UNIT G G G B grade PARAMETR Operate Point Release Point Hysteresis SYMBOL BOP BRP BHYS Min. 5 -70 20 Typ. Max. 70 -5 140 UNIT G G G C grade PARAMETR Operate Point Release Point Hysteresis SYMBOL BOP BRP BHYS Min. -100 20 Typ. Max. 100 200 UNIT G G G UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R118-003,C UH277 HYSTERESIS CHARACTERISTICS LINEAR INTEGRATED CIRCUIT Output Voltage i n Volts DOB OFF Output Voltage in Volts OFF DO ON Brp 0 Bop DOB DO Brp 0 Bop ON Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R118-003,C UH277 TYPICAL APPLICATION CIRCUIT LINEAR INTEGRATED CIRCUIT UTC UH277 coil1 coil2 1 + - Vcc 23 4 Brushless DC Fan TEST CIRCUIT 14V UTC UH277 DO RL1 820 RL2 820 CL2 20pF DOB CL1 20pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R118-003,C UH277 PERFORMANCE CHARACTERISTICS Ta( ) PD (mW) 25 550 50 525 60 515 70 505 80 485 85 475 90 465 LINEAR INTEGRATED CIRCUIT 95 455 100 445 105 425 110 405 115 385 120 365 Power Dissipation Curve 600 500 PD (mW) 400 300 200 100 0 25 50 75 Ta ( ) Typical Magnetic Switch Point VS.Supply Voltage 75 BHYS Flux Density (G) 50 BOP 25 0 BRP -25 5 12 Supply Voltage (V) Typical Supply Current versus Supply Voltage 20 Supply Current (mA) 18 16 14 Ta=25 Ta=80 100 125 150 20 24 Ta=-20 0 0 5 10 Supply Voltage (V) 15 20 25 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-R118-003,C |
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