AN8261 Brushless Motor Driver ■ Overview 21.7±0.3 • Operating supply voltage range : VCC= 4.5 to 7V • 3-phase full-wave drive, external power transistor • Built-in low-voltage protective circuit • Built-in thermal protective comparator circuit • Built-in Hall amplifiers with hysteresis 18 2 17 3 16 4 15 5 14 6 13 7 12 8 11 9 10 2.54 ■ Features 1 0.5±0.1 1.2±0.25 Unit : mm The AN8261 is a 3-phase full-wave brushless motor drive IC and optimum for driving the air conditioner fan motors, etc. 0.51min. 6.3±0.25 ■ Applications 3.8±0.25 (3.45) Driving the brushless motors such as air conditioner fan motors, etc. 0.3 3 ~15˚ + 0.1 5 – 0.2 7.62±0.25 18-pin DIL Plastic Package (DIP018-P-0300D) ■ Block Diagram VCC 1 2 3 18 7 17 12 Hysteresis Amp.A 8 16 Signal Processing 11 15 9 Hysteresis Amp.B 14 10 13 Hysteresis Amp.C TSD Hysteresis Control VREF VCC GND 4 6 5 Monitor Protector ■ Absolute Maximum Ratings (Ta=25˚C) Symbol Rating Supply voltage Parameter VCC 7.5 V Supply current ICC I7, I8, I9 I10, I11, I12 80 mA –7 to + 25 mA mW Output drive current Unit Power dissipation PD 800 Operating ambient temperature Topr –20 to + 80 ˚C Storage temperature Tstg –55 to +150 ˚C ■ Recommended Operating Range (Ta=25˚C) Parameter Symbol Range VCC 4.5V to 7V Operating supply voltage range ■ Electrical Characteristics (Ta=25˚C) Parameter Supply current 1 Symbol Condition min ICC1 VCC=5V Supply current 2 ICC2 VCC=3.5V Sensor amp. input voltage L to H VSLH VCC=5V 1 Sensor amp. input voltage H to L VSHL VCC=5V –20 FG output voltage low level VOL VCC=5V, IPO=5mA Power drive output voltage high level VPOH VCC=5V, IPO=–3mA 3.6 Power drive output current high level IPOH VCC=5V, VPO=2V –8 Power drive output voltage low level 1 VPOL1 Power drive output voltage low level 2 VPOL2 Power drive output voltage low level 3 VPOL3 VCC=5V, IPO=15mA Sensor amp. input voltage hysteresis width VSW VCC=5V FG output pull-up resistance value RO IW=30µA Protect reset voltage VR typ max Unit 40 56 mA 47 62 mA 10 20 mV –10 –1 mV 0.4 V –4 mA VCC=5V, IPO=10mA 0.4 V VCC=5V, IPO=20mA 0.6 V V –6 12 20 0.6 V 28 mV 8 10 12 kΩ 3.5 4 4.5 V V Temperature protect operating voltage VT VCC=5V 1 1.15 1.3 Temperature protect resetting voltage VTR VCC=5V 0.5 0.63 0.8 V TSD bias current ITSD VCC=5V, VTSD=0.5V 10 µA Vref VCC=5V 2.6 V 0.15 V Reference voltage Reference voltage regulation VrefREGV VCC=4V→7V Reference voltage load reguration VrefREGV VCC=5V, IO=0mA→10mA VCC protect hysteresis width VCCW 2 100 2.3 0.1 V 210 450 mV Temperature protect operating voltage Vref ratio VT/Vref VCC=5V 48.5 50 51.5 % Temperature protect operating voltage Vref ratio VR/Vref VCC=5V 25.3 27.4 29.5 % ■ Application Circuit 470Ω 470Ω 1kΩ 1 VCC 18 HA+ 1kΩ 56Ω 470Ω VCC 5V 1kΩ VM 30V UH 7 VH 8 17 HA– WH 9 16 HB+ 15 HB– 50V + 1µF – 14 HC+ AN8261 13 HC– WL 10 2 FG1 3 FG2 6 Vref VL 11 TSD 5 GND UL 12 4 56Ω 270Ω 270Ω 270Ω GND ■ Pin Descriptions Pin No. Pin name 1 VCC 2 FG1 Description I/O DC/waveform Supply voltage input pin I 5V FG signal output pin O Equivalent circuit 5V 10kΩ 2 0V 5V 3 FG2 FG signal output pin 10kΩ O 3 0V 4 GND GND pin I 5 TSD Temperature protect input signal pin I Reference voltage output pin (TSD reference voltage) O 6 VREF 0V 1.15V 5 2.3V 6 ■ Pin Descriptions (cont.) Pin No. Pin name 7 UH Description I/O DC/waveform Equivalent circuit VCC 8 VH 9 WH VCC 6 7 Power driver output pin 10 WL 11 VL 12 UL 13 HC– 14 HC+ 15 HB– 16 + O 8 9 10 11 12 Hall element input pin I HB 13 14 15 16 17 18 – 17 HA 18 HA+ ■ Logic Diagram No. Output Input Symbol Pin No. 1 2 3 4 5 6 HA+ 18 H H L L L H HA– 17 L L H H H L + 16 L H H H L L HB – 15 H L L L H H HC+ 14 L L L H H H HC– 13 H H H L L L FG1 2 L L H H H L FG2 3 L H L H L H UH 7 L L H H L L VH 8 L L L L H H WH 9 H H L L L L HB UL 12 H L L L L H VL 11 L H H L L L WL 10 L L L H H L