UNISONIC TECHNOLOGIES CO., LTD UH276 LINEAR INTEGRATED CIRCUIT COMPLEMENTARY OUTPUTS HALL EFFECT LATCH IC DESCRIPTION The UTC UH276 is a Latch-Type Hall Effect sensor with built-in complementary output drivers. The UTC UH276 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 UH276 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 * Power Supply range from 3V ~ 20V. * On-chip Hall sensor with 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. 1 SIP-4 *Pb-free plating product number:UH276L ORDERING INFORMATION Order Number Normal Lead Free Plating UH276-G04-K UH276L-G04-K Package Packing SIP-4 Bulk UH276L-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 © 2005 Unisonic Technologies Co., Ltd 1 of 5 QW-R118-009,A UH276 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM 1 DO VCC 2 REG. Hall Sensor DOB 3 VSS 4 UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 5 QW-R118-009,A UH276 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS (Ta=25℃) PARAMETER Supply Voltage Reverse VCC Polarity Voltage Output OFF Voltage Magnetic flux density SYMBOL VCC VRCC VCE B Continuous Hold Peak (Start Up) Output ON Current RATINGS 20 -25 32 Unlimited 0.3 0.4 0.7 500 +150 -20 ~ +85 -65 ~ +150 IC Power Dissipation Junction Temperature Operating Temperature Storage Temperature Note 1: Output Zener protection voltage PD TJ TOPR TSTG 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 MIN TYP 0.4 MAX 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 20 0.6 10 25 3 1 3 0.3 <0.1 15 0.3 0.04 0.3 UNIT V V V µA mA µS µS µS MAGNETIC CHARACTERISTICS PARAMETR SYMBOL Min. BOP BRP BHYS 5 -70 20 Operate Point Release Point Hysteresis Typ. Max. UNIT 70 -5 140 G G G DOB OFF ON DOB Brp Bop Output Voltage in Volts Output Voltage i n Volts HYSTERESIS CHARACTERISTICS OFF DO DO ON Brp Bop 0 0 Magnetic Flux Density in Gauss Magnetic Flux Density in Gauss UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 5 QW-R118-009,A UH276 LINEAR INTEGRATED CIRCUIT TYPICAL APPLICATION CIRCUIT coil1 UTC UH276 1 2 3 coil2 4 + - Vcc Brushless DC Fan TEST CIRCUIT 14V UTC UH276 DO RL1 820Ω RL2 820Ω CL1 20pF UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw DOB CL2 20pF 4 of 5 QW-R118-009,A UH276 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 Power Dissipation Curve 600 PD (mW) 500 400 300 200 100 0 25 50 75 100 125 150 Ta (℃) Typical Magnetic Switch Point VS.Supply Voltage Flux Density (G) 120 80 B HYS 40 B OP 0 B RP -40 12 5 20 24 Supply Voltage (V) Typical Supply Current versus Supply Voltage Supply Current (mA) 20 Ta=80? Ta=25? 17 14 Ta=-20? 0 0 5 10 15 20 25 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-R118-009,A