Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH General Description Features The AH276 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. · · · · · · · · AH276 On-Chip Hall Sensor 3.5V to 16V Supply Voltage 350mA (avg) Output Sink Current Reversed Supply Voltage Protection Build in Over Temperature Protection Function -20oC to 85oC Operating Temperature Low Profile TO-94 (SIP-4L) Package ESD Rating: 300V (Machine Model) Applications · · · · 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). Dual-Coil Brushless DC Motor Dual-Coil Brushless DC Fan Revolution Counting Speed Measurement AH276 is available in TO-94 (SIP-4L) package. TO-94 Figure 1. Package Type of AH276 Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 1 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Pin Configuration Z4 Package (TO-94) 4 GND 3 2 DOB DO 1 VCC Figure 2. Pin Configuration of AH276 (Front View) Pin Description Pin Number Pin Name Function 1 VCC Supply voltage 2 DO Output 1 3 DOB Output 2 4 GND Ground Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 2 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Functional Block Diagram VCC DO 1 2 Temperature Compensation Regulator 4 Hall Sensor Schmitt Trigger Amplifier GND Output Driver 3 DOB Over Temperature Protection Figure 3. Functional Block Diagram of AH276 Ordering Information AH276 Package TO-94 - Circuit Type E1: Lead Free Package Z4: TO-94 (SIP-4L) Magnetic Characteristics A: 10 to 50Gauss B: 5 to 70Gauss C: 100Gauss Temperature Range -20 to 85 oC Part Number Marking ID Packing Type AH276Z4-AE1 AH276Z4-E1 Bulk AH276Z4-BE1 AH276Z4-E1 Bulk AH276Z4-CE1 AH276Z4-E1 Bulk BCD Semiconductor's Pb-free products, as designated with "E1" suffix in the part number, are RoHS compliant. Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 3 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Absolute Maximum Ratings (Note 1) (TA=25oC) Parameter Symbol Value Unit Supply Voltage VCC 20 V Reverse Protection Voltage VRCC -20 V B Unlimited Gauss 350 mA 550 mA 750 mA PD 550 mW Die to atmosphere θJA 227 oC/W Die to package case θJC 49 oC/W TSTG -50 to 150 oC ESD (Machine Model) 300 V ESD (Human Body Model) 2500 V Magnetic Flux Density Continuous Output Current IO Hold Peak (start up) Power Dissipation Thermal Resistance Storage Temperature 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. "Absolute Maximum Ratings" for extended period may affect device reliability. Recommended Operating Conditions (TA=25oC) Parameter Supply Voltage Ambient Temperature Symbol Min Max VCC 3.5 16 V 85 o TA -20 Apr. 2007 Rev. 1. 2 Unit C BCD Semiconductor Manufacturing Limited 4 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Electrical Characteristics (TA=25oC, VCC=14V, unless otherwise specified) Parameter Symbol VSAT Output Saturation Voltage Test Condition Min Typ Max VCC=3.5V, IO=100mA 0.3 IO=350mA 0.35 0.6 Unit V V Output Leakage Current IOL VCE=16V 0.1 10 µA Supply Current ICC VCC=16V, Output Open 12 16 mA 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 ∆t RL=820Ω, CL=20pF 3.0 10 µs Output Zener Breakdown Voltage VZ 55 Thermal Protection Temperature TSD 178 Thermal Protection Hysteresis ∆TSD 40 V o C oC Magnetic Characteristics (TA=25oC) Parameter Symbol BOP Operating Point Grade Min A 10 B 5 Typ C BRP Releasing Point Hysteresis Max Unit 50 Gauss 70 Gauss 100 Gauss A -50 -10 Gauss B -70 -5 Gauss C -100 Gauss 75 BHYS Gauss V DO (V) Off-state High B HYS Turn off Turn on Low V SAT On-state N B RP S B OP 0 Magnetic Flux Density (Gauss) Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 5 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Magnetic Characteristics (Continued) +14V AH276 S VCC Marking Side DO DOB GND 1 2 4 3 DO (VOUT1) R1 820Ω R2 N DOB (VOUT2) 820Ω C1 C2 20pF 20pF Figure 4. Basic Test Circuit DO (V) DOB (V) 16 16 VCC 14 14 12 12 10 10 8 8 6 6 4 4 2 -40 -20 0 VSAT 20 2 VSAT 40 -40 Magnetic Flux Density B (Gauss) VCC -20 0 20 40 Magnetic Flux Density B (Gauss) Figure 5. VDO vs. Magnetic Flux Density Figure 6. VDOB vs. Magnetic Flux Density Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 6 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Typical Performance Characteristics 100 13 80 12 60 BOP/BRP/BHYS (Gauss) 14 ICC (mA) 11 10 9 8 O Ta=-25 C O Ta=-0 C O Ta=+25 C O Ta=+85 C 7 6 40 20 BOP BRP BHYS 0 -20 O Ta=25 C -40 -60 5 -80 2 4 6 8 10 12 14 16 18 20 4 6 8 10 VCC (V) 12 14 16 18 20 VCC (V) Figure 7. ICC vs. VCC Figure 8. BOP/BRP/BHYS vs. VCC 800 75 50 25 0 PD (mW) BOP/BRP/BHYS (Gauss) 600 BOP BRP BHYS -25 400 200 O TA=+25 C -50 -20 0 20 O 40 60 0 -25 80 0 25 50 75 100 125 150 o TA ( C) TA ( C) Figure 9. BOP/BRP/BHYS vs. Ambient Temperature Figure 10. PD vs. Ambient Temperature Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 7 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Typical Performance Characteristics (Continued) 6005 14 VCC=3.5V VCC=14V VCC=20V IO=100mA IO=200mA IO=300mA IO=350mA IO=400mA 500 12 VSAT(mV) ICC (mA) 400 10 300 8 200 6 100 -20 0 20 40 60 -20 80 0 20 O 40 60 80 O TA ( C) TA( C) Figure 12. VSAT vs. Ambient Temperature Figure 11. ICC vs. Ambient Temperature Typical Applications D1 AH276 VCC DO 1 2 COIL1 COIL2 R1 470 R2 470 DOB GND 4 3 VCC + C1 2.2µF + C2 2.2µF Figure 12. Typical Application Circuit Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 8 Data Sheet COMPLEMENTARY OUTPUT HALL EFFECT LATCH AH276 Mechanical Dimensions TO-94 0.500(0.020) 0.700(0.028) 3.780(0.149) Unit: mm(inch) 45°TYP 4.080(0.161) 1.520(0.059) 1.720(0.067) 0.700(0.028) 0.900(0.035) 4.980(0.196) 5.280(0.208) 0.360(0.014) 0.510(0.020) 1.850(0.073) 1.250(0.050) Package Sensor Location 0.380(0.015) 0.550(0.022) 3.450(0.136) 3.750(0.148) 0.360(0.014) 0.500(0.020) 14.900(0.587) 15.300(0.602) 1.270(0.050) TYP 3.710(0.146) 3.910(0.154) Apr. 2007 Rev. 1. 2 BCD Semiconductor Manufacturing Limited 9 http://www.bcdsemi.com IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. BCD Semiconductor Manufacturing Limited does not assume any responsibility for use of any its products for any particular purpose, nor does BCD Semiconductor Manufacturing Limited assume any liability arising out of the application or use of any its products or circuits. BCD Semiconductor Manufacturing Limited does not convey any license under its patent rights or other rights nor the rights of others. MAIN SITE BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited - Wafer Fab Shanghai SIM-BCD Semiconductor Manufacturing Limited 800, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6485 1491, Fax: +86-21-5450 0008 - IC Design Group Advanced Analog Circuits (Shanghai) Corporation 8F, Zone B, 900, Yi Shan Road, Shanghai 200233, China Tel: +86-21-6495 9539, Fax: +86-21-6485 9673 REGIONAL SALES OFFICE Shenzhen Office Shanghai SIM-BCD Semiconductor Manufacturing Co., Ltd. Shenzhen Office Advanced Analog Circuits (Shanghai) Corporation Shenzhen Office Room E, 5F, Noble Center, No.1006, 3rd Fuzhong Road, Futian District, Shenzhen 518026, China Tel: +86-755-8826 7951 Fax: +86-755-8826 7865 Taiwan Office BCD Semiconductor (Taiwan) Company Limited 4F, 298-1, Rui Guang Road, Nei-Hu District, Taipei, Taiwan Tel: +886-2-2656 2808 Fax: +886-2-2656 2806 USA Office BCD Semiconductor Corporation 30920 Huntwood Ave. Hayward, CA 94544, U.S.A Tel : +1-510-324-2988 Fax: +1-510-324-2788