AH477AZ4-AG1

Data Sheet SINGLE PHASE HALL EFFECT LATCH General Description The AH477A is an integrated Hall sensor with Hbridged output driver designed for brushless DC motor applications. The device includes an on-chip Hall sensor for magnetic sensing, an amplifier that amplifies the Hall voltage, a comparator to provide switching hysteresis for noise rejection, a bi-directional drivers for sinking and driving large current load. It also includes an internal bandgap regulator to provide temperature compensated bias for internal circuits and allows a wide operating supply voltage range. Placing the device in a variable magnetic field, if the magnetic flux density is larger than threshold BOP, the DO is turned to sink and DOB is turned to drive. This output state is held until the magnetic flux density reverses and falls below BRP, then causes DO to be turned to drive and DOB turned to sink. The AH477A is available in TO-94 (SIP-4L) package. AH477A Features · · · · · · · · · On-Chip Hall Sensor Operating Voltage: 3.5V to 18V H-Bridge Output Drivers for Single Coil Internal Bandgap Regulator for Temperature Compensation Low Output Switching Current Noise Operating Temperature: -20oC to 85oC Low Profile TO-94 (SIP-4L) Package ESD Rating: 6000V (Human Body Model) Suitable for PWM Power Supply Control Speed Applications · · Single-coil Brushless DC Motor Single-coil Brushless DC Fan TO-94 Figure 1. Package Type of AH477A Oct. 2009 Rev. 1. 2 1 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Pin Configuration Z4 Package (TO-94) GND DOB DO VCC AH477A 4 3 2 1 Figure 2. Pin Configuration of AH477A (Front View) Pin Description Pin Number 1 2 3 4 Pin Name VCC DO DOB GND Supply voltage Output 1 Output 2 Ground Function Oct. 2009 Rev. 1. 2 2 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Functional Block Diagram VCC 1 Regulator 2 DO VCC AH477A Hall Sensor Amplifier Schmitt Trigger PreDriver VCC 3 4 GND DOB Figure 3. Functional Block Diagram of AH477A Ordering Information AH477A Circuit Type Package Z4: TO-94 (SIP-4L) G1: Green Magnetic Characteristics A: 5 to 70 Gauss B: 100 Gauss Part Number AH477AZ4-AG1 AH477AZ4-BG1 Marking ID 477AZ4-G1 477AZ4-G1 Packing Type Bulk Bulk Package TO-94 Temperature Range -20 to 85oC BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant and green. Oct. 2009 Rev. 1. 2 3 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Absolute Maximum Ratings (Note 1) (TA=25oC) Parameter Supply Voltage Magnetic Flux Density Continuous Output Current Hold Peak (start up) Power Dissipation Die to atmosphere Thermal Resistance Die to package case Storage Temperature ESD (Machine Model) ESD (Human Body Model) PD θJA θJC TSTG IO Symbol VCC B Value 20 Unlimited 250 300 600 550 227 49 -50 to 150 600 6000 Unit V Gauss mA mA mA mW oC/W o AH477A C/W oC V V 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 Frequency (PWM Power) Ambient Temperature Symbol VCC f TA Min 3.5 0.1 -20 Max 18 25 85 Unit V kHz o C Oct. 2009 Rev. 1. 2 4 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Electrical Characteristics (TA=25oC, VCC=14V, unless otherwise specified) Parameter Output Saturation Voltage (Sink) Output Saturation Voltage (Drive) Supply Current Output Rise Time Output Fall Time VSAT ICC tr tf Symbol Test Condition VCC=14V, IO=200mA VCC=14V, IO=200mA VCC=20V, Output Open RL=820Ω, CL=20pF RL=820Ω, CL=20pF VCC1.3 Min Typ 0.45 VCC1.0 13.5 0.5 0.5 Max 0.65 VCC 16 1.0 1.0 Unit V V mA µs µs AH477A Magnetic Characteristics (TA=25oC) Parameter Operating Point Releasing Point Hysteresis Symbol BOP BRP BHYS Grade A B A B -70 -100 70 Min 5 Typ Max 70 100 -5 Unit Gauss Gauss Gauss Test Circuit AH477A S Marking Side VCC VCC DO DOB GND 1 2 3 4 C1 0.1µF 820Ω N Oct. 2009 Rev. 1. 2 5 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Magnetic Hysteresis Characteristics AH477A 14 14 12 12 10 10 DO Output (V) DOB Output (V) -100 -50 0 50 100 8 8 6 6 4 4 2 2 0 0 -100 -50 0 50 100 Magnetism (GS) Magnetism (GS) Figure 4. DO Output vs. Magnetism Figure 5. DOB Output vs. Magnetism Typical Performance Characteristics 16 14 20 16 12 10 ICC (mA) 8 6 4 ICC (mA) 12 8 4 2 0 TA=25 C 0 2 4 6 8 10 12 14 16 18 20 0 -20 -10 0 10 20 30 40 50 o VCC=14V 60 70 80 VCC (V) TA ( C) O Figure 6. Supply Current vs. Supply Voltage Figure 7. Supply Current vs. Ambient Temperature Oct. 2009 Rev. 1. 2 6 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Typical Performance Characteristics (Continued) AH477A 100 80 60 100 80 60 BOP/BRP/BHYS (GS) BOP/BRP/BHYS (GS) 40 20 0 -20 -40 -60 -80 40 20 0 -20 -40 -60 BOP BRP BHYS BOP BRP BHYS TA=25 C 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 o -80 -100 -20 -10 0 10 20 30 O VCC=14V 40 50 60 70 80 -100 VCC (V) TA ( C) Figure 8. BOP/BRP/BHYS vs. Supply Voltage Figure 9. BOP/BRP/BHYS vs. Ambient Temperature 1200 1000 900 1000 800 700 800 600 VSAT_Up VSAT_Down VSAT (mV) VSAT (V) 600 500 400 300 Driver Sink 400 200 TA=25 C O 200 100 IO=200mA -20 0 20 40 60 80 0 50 75 100 125 150 175 200 225 250 275 300 0 IO (mA) TA ( C) o Figure 10. VSAT vs. IO Figure 11. VSAT vs. Ambient Temperature Oct. 2009 Rev. 1. 2 7 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Typical Performance Characteristics (Continued) AH477A 800 600 PD (mW) 400 200 0 -25 0 25 50 75 100 125 150 TA ( C) o Figure 12. PD vs. Ambient Temperature Typical Application AH477A VCC DO DOB GND 1 VCC D1 2 3 4 C1 0.1µF COIL Figure 13. Typical Application Circuit Oct. 2009 Rev. 1. 2 8 BCD Semiconductor Manufacturing Limited Data Sheet SINGLE PHASE HALL EFFECT LATCH Mechanical Dimensions TO-94 45 °TYP AH477A Unit: mm(inch) 0.500(0.020) 0.700(0.028) 1.520(0.059) 1.720(0.067) 0.700(0.028) 0.900(0.035) 1.720(0.068) 2.020(0.080) 1.100(0.043) 1.400(0.055) Package Sensor Location (For Hall IC) 3.780(0.149) 4.080(0.161) 4.980(0.196) 5.280(0.208) 0.360(0.014) 0.510(0.020) 0.380(0.015) 0.550(0.022) 3.450(0.136) 3.750(0.148) 0.360(0.014) 0.500(0.020) 14.000(0.550) 15.300(0.602) 1.270(0.050) TYP 3.710(0.146) 3.910(0.154) Oct. 2009 Rev. 1. 2 9 BCD Semiconductor Manufacturing Limited BCD Semiconductor Manufacturing Limited http://www.bcdsemi.com IMPORTANT NOTICE IMPORTANT NOTICE BCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifiBCD Semiconductor Manufacturing Limited reserves the right to make changes without further notice to any products or specifications herein. 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