OH277 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Order Information PN OH277A/B/C Temperature Range -20 to 85°C Package 1000pcs/bag General Description Description:: OH277 is an integrated Hall sensor with output driver designed for electronic commutation of brushless DC motor applications. The device includes an onchip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a Schmitt trigger to provide switching hysteresis for noise rejection, a temperature compensation circuit to compensate the temperature drift of Hall sensitivity and two complementary open-collector drivers for sinking large load current. It also includes an internal band-gap regulator which is used to provide bias voltage for internal circuits. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the pin DO will be turned low (on) and pin DOB will be turned high (off). This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned high (off) and DOB turned low (on). Features Applications · On-Chip Hall Sensor · Dual-Coil Brushless DC Motor · 3.5V to 16V Supply Voltage · Dual-Coil Brushless DC Fan · 400mA (avg) Output Sink Current · Revolution Counting · Reversed Supply Voltage Protection · Speed Measurement · -20oC to 85oC Operating Temperature · Low Profile TO-94 (SIP-4L) Package · ESD Rating: 300V (Machine Model) Functional Block Diagram Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 1 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] OH277 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Absolute Maximum Ratings （TA=25℃） Parameter Symbol Value Unit VCC 20 V VRCC -20 V B Unlimited Gauss 400 mA 600 mA 800 mA PD 550 mW Die to atmosphere θJA 227 °C /W Die to package case θJC 49 °C /W TSTG -50 to 150 °C ESD (Machine Model) 300 V ESD (Human Body Model) 2000 V Supply Voltage Reverse Protection Voltage Magnetic Flux Density Continuous Output Current Hold IO Peak (start up) Power Dissipation Thermal Resistance Storage Temperature Recommended Operating Conditions (TA=25°C) Supply Voltage VCC 3.5 --16 V Ambient Temperature TA -20 to 85°C Electrical Characteristics (TA=25°C, VCC=14V, unless otherwise specified) Value Parameter Symbol Conditions Unit Min VSAT Output Leakage Current IOL Supply Current ICC Max 0.4 VCC=3.5V, IO=100mA Output Saturation Voltage Typ V IO=400mA - 0.35 0.6 V VCE=16V - 0.1 10 μA - 12 16 mA VCC=16V, OUTPUT OPEN Output Rise Time tr RL=820Ω, CL=20pF - 3.0 10 μS Output Fall Time tf RL=820Ω, CL=20pF - 0.3 1.5 μS Switch Time Differential Δt RL=820Ω, CL=20pF 3.0 10 μS Output Zener Breakdown Voltage VZ Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 55 Page 2 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] V OH277 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Magnetic Characteristics (TA=25°C) Parameter Operating Point Symbol Grade Min Typ Max Unit A 10 30 50 Gauss B 5 70 Gauss 100 Gauss -10 Gauss -5 Gauss BOP C Releasing Point Hysteresis BRP A -50 B -70 C -100 BHYS -30 Gauss 60 Magnetic-electrical Transfer Characteristics Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 3 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] OH277 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Basic Test Circuit Circuit： VDO vs. Magnetic Flux Density Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 VDOB vs. Magnetic Flux Density Page 4 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] OH277 COMPLEMENTARY OUTPUT HALL EFFECT LATCH Mechanical Dimension TO-94 unit:mm(inch) Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 5 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected]