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AN8261
Brushless Motor Driver
s Overview
The AN8261 is a 3-phase full-wave brushless motor drive IC and optimum for driving the air conditioner fan motors, etc.
1 2 3 21.70.3 4 5 6 7 8 9 6.30.25 3.80.25 (3.45) 18 17 15 14 13 12 11 10 0.51min. 2.54
0.3
+ 0.1 5 - 0.2
Unit : mm 0.50.1 1.20.25
s Features
* 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
16
s Applications
Driving the brushless motors such as air conditioner fan motors, etc.
3 ~15
7.620.25
18-pin DIL Plastic Package (DIP018-P-0300D)
s Block Diagram
VCC 1 2 3
18 17 Hysteresis Amp.A 16 Signal Processing 15 Hysteresis Amp.B 14 13 Hysteresis Amp.C VREF GND 4 TSD Hysteresis Control VCC Monitor Protector
7 12 8 11 9 10
6
5
s Absolute Maximum Ratings (Ta=25C)
Parameter Supply voltage Supply current Output drive current Power dissipation Operating ambient temperature Storage temperature Symbol VCC ICC I7, I8, I9 I10, I11, I12 PD Topr Tstg Rating 7.5 80 -7 to + 25 800 -20 to + 80 -55 to +150 Unit V mA mA mW C C
s Recommended Operating Range (Ta=25C)
Parameter Operating supply voltage range Symbol VCC Range 4.5V to 7V
s Electrical Characteristics (Ta=25C)
Parameter Supply current 1 Supply current 2 Sensor amp. input voltage L to H Sensor amp. input voltage H to L FG output voltage low level Power drive output voltage high level Power drive output current high level Power drive output voltage low level 1 Power drive output voltage low level 2 Power drive output voltage low level 3 Sensor amp. input voltage hysteresis width FG output pull-up resistance value Protect reset voltage Temperature protect operating voltage Temperature protect resetting voltage TSD bias current Reference voltage Reference voltage regulation Reference voltage load reguration VCC protect hysteresis width Temperature protect operating voltage Vref ratio Temperature protect operating voltage Vref ratio Symbol ICC1 ICC2 VSLH VSHL VOL VPOH IPOH VPOL1 VPOL2 VPOL3 VSW RO VR VT VTR ITSD Vref VrefREGV VrefREGV VCCW VT/Vref VR/Vref VCC=5V VCC=5V VCC=5V VCC=5V VCC=5V, VTSD=0.5V VCC=5V VCC=4V7V VCC=5V, IO=0mA10mA 100 48.5 25.3 210 50 27.4 2 2.3 VCC=5V VCC=3.5V VCC=5V VCC=5V VCC=5V, IPO=5mA VCC=5V, IPO=-3mA VCC=5V, VPO=2V VCC=5V, IPO=10mA VCC=5V, IPO=20mA VCC=5V, IPO=15mA VCC=5V IW=30A 12 8 3.5 1 0.5 20 10 4 1.15 0.63 3.6 -8 -6 -4 0.4 0.6 0.6 28 12 4.5 1.3 0.8 10 2.6 0.15 0.1 450 51.5 29.5 1 -20 Condition min typ 40 47 10 -10 max 56 62 20 -1 0.4 Unit mA mA mV mV V V mA V V V mV k V V V A V V V mV % %
s Application Circuit
VM 30V
VCC 5V
470
470 1k
18 HA+ 17 HA- 16 HB+ 15 HB- 50V 1F
+ -
1 VCC
UH 7 VH 8 WH 9
14 HC+ 13 HC- 2 FG1 3 FG2 6 Vref
AN8261
WL 10 VL 11 TSD 5 GND UL 12 4 1k 1k 270 270 270
56 GND
s Pin Descriptions
Pin No. 1 Pin name VCC Description Supply voltage input pin I/O I DC/waveform 5V Equivalent circuit
470
56
5V 2 FG1 FG signal output pin O 0V
10k 2
5V 3 FG2 FG signal output pin O 0V 4 GND GND pin I 0V
10k 3
5
TSD
Temperature protect input signal pin
I
5
1.15V
6
VREF
Reference voltage output pin (TSD reference voltage)
O
2.3V
6
s Pin Descriptions (cont.)
Pin No. 7 8 9 10 11 12 13 14 15 16 17 18 Pin name UH
VCC
Description
I/O
DC/waveform
Equivalent circuit
VH WH Power driver output pin WL VL UL HC- HC+ HB- HB
+
VCC 6 7
O
8 9 10 11 12
Hall element input pin I
13 15 17 14 16 18
HA
-
HA+
s Logic Diagram
Symbol HA+ HA- Input HB
+ -
No. Pin No. 18 17 16 15 14 13 2 3 7 8 9 12 11 10
1 H L L H L H L L L L H H L L
2 H L H L L H L H L L H L H L
3 L H H L L H H L H L L L H L
4 L H H L H L H H H L L L L H
5 L H L H H L H L L H L L L H
6 H L L H H L L H L H L H L L
HB
HC+ HC- FG1 FG2 UH Output VH WH UL VL WL

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