Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 General Description Features The AH41 is an integrated Hall-effect latched sensor designed for electronic commutation of brushless DC motor applications. The device includes an on-chip Hall voltage generator for magnetic sensing, a comparator that amplifiers the Hall voltage, and a Schmitt to provide switching hysteresis for noise rejection and open-collector output. An internal bandgap regulator is used to provide temperature compensated supply voltage for internal circuits and allows a wide operating supply range. • • • • • • • A north pole of sufficient strength will turn the output ON. In the absence of a magnetic field, the output is OFF. On-chip Hall Sensor Wide Operating Voltage Range: 4V to 24V Internal Bandgap Regulator for Temperature Compensation Maximum Output Sink Current: 50mA Low Profile TO-92S-3 Operating Temperature: -40˚C to 150˚C ESD Rating: 2000V (Human Body Model) 300V (Machine Model) Application • Brushless DC Motor This IC is available in TO-92S-3 package. TO-92S-3 Figure 1. Package Type of AH41 Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Pin Configuration Z3 Package (TO-92S-3) Figure 2. Pin Configuration of AH41 (Front View) Pin Description Pin Number Pin Name 1 VCC Power supply pin 2 GND Ground pin 3 OUTPUT Nov 2010 Function Output pin. It is low during the N magnetic field Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Functional Block Diagram Figure 3. Functional Block Diagram of AH41 Ordering Information AH41 - G1: Green Circuit Type Magnetic Characteristics A: 30 to 75 Gauss B: 5 to 105 Gauss Package Z3: TO-92S-3 Package Temperature Range TO-92S-3 -40 to 150°C Part Number Marking ID Packing Type AH41Z3-AG1 AH41 Bulk AH41Z3-BG1 AH41 Bulk BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Absolute Maximum Ratings (Note 1) Parameter Symbol Value Unit Supply Voltage VCC -24 to 28 V Output OFF Voltage VCE 30 V Output Sink Current (Continuous Current) IOUT 50 mA PD 400 mW Storage Temperature TSTG -65 to 150 °C Junction Temperature TJ 150 °C ESD (Machine Model) 300 V ESD (Human Body Model) 2000 V Power Dissipation (TA=25°C) Note 1: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied. Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability. Recommended Operating Conditions (TA=25°C) Parameter Symbol Min Max Unit Supply Voltage VCC 4 24 V Operating Temperature TOP -40 150 °C Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 4 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Electrical Characteristics VCC =12V, TA =25°C, unless otherwise specified. Parameter Symbol Conditions Min Typ Max Unit 24 V 6 9 mA Supply Voltage VCC Supply Current ICC VCC=4V to 24V Output Leakage Current IOL VCE=14V 0.1 10 µA IOUT =20mA 110 300 mV ns Output Saturation Voltage 4 VSAT Rise Time tr Fall Time tf RL=820Ω CL=20pF RL=820Ω CL=20pF 200 100 ns Magnetic Characteristics (TA=25°C) Parameter Operating Point Releasing Point Hysteresis Symbol Grade BOP BRP Min Typ Max A 30 75 B 5 105 A -75 -30 B -105 -5 BHYS 80 110 140 Unit Gauss Gauss Gauss VOUT High BHYS Turn off Low BRP VSAT N Turn on B OP S 0 Magnetic Flux Density (Gauss) Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Test Circuit AH41 (Front View) VCC S VCC GND OUTPUT Marking Side N 1 2 3 VOUT RL 820Ω CL 20pF Figure 4. Basic Test Circuit of AH41 Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 6 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Typical Performance Characteristics 7 10 6 Supply Current (mA) Supply Current (mA) 8 5 4 3 6 4 2 2 VCC=12V o 1 TA=25 C 0 0 3 6 9 12 15 18 21 0 -40 24 -20 0 20 60 80 100 120 140 o Supply Voltage(V) Ambient Temperature ( C) Figure 5. Supply Current vs. Supply Voltage Figure 6. Supply Current vs. Ambient Temperature 200 400 300 150 BOP/BRP/BHYS (Gauss) BOP/BRP/BHYS (Gauss) 40 200 100 0 -100 100 50 BOP BRP 0 BHYS BOP BRP -200 -50 BHYS -300 4 8 12 16 20 -100 -40 24 0 20 40 60 80 100 120 140 Ambient Temperature ( C) Figure 7. BOP/BRP/BHYS vs. Supply Voltage Nov 2010 -20 o Supply Voltage (V) Figure 8. BOP/BRP/BHYS vs. Ambient Temperature Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Typical Performance Characteristics (Continued) 200 Saturation Voltage (V) VCC=12V IOUT=10mA 150 IOUT=20mA 100 50 0 -40 -20 0 20 40 60 80 100 120 140 o Ambient Temperature ( C) Figure 9. Saturation Voltage vs. Ambient Temperature Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet BIPOLAR HALL-EFFECT POSITION SENSORS AH41 Mechanical Dimensions TO-92S-3 Unit: mm(inch) ° ° Nov 2010 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor BCD Semiconductor Manufacturing Manufacturing Limited Limited reserves reserves the the right right to to make make changes changes without without further further notice notice to to any any products products or or specifispecifications herein. cations herein. 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