AH9485 86

AH9485/86
SINGLE PHASE LOW NOISE SMART MOTOR DRIVER
Description
Pin Assignments
The AH9485 and AH9486 are single chip solutions for driving a single
phase (coil) brushless DC motors. It integrates the motor driver and
the high sensitivity Hall effect sensor to simplify the system circuit and
PCB design for simpler solutions.
(Top View)
Pin 1 Mark
NEW PRODUCT
Rotor lock-detect, shutdown and auto-restart functions help to prevent
the motor from over-heating when rotor is locked and restarts the
motor after the lock is removed.
The AH9485 and AH9486 have built-in open drain tachometer
frequency generator (FG) and rotation detection (RD) outputs to allow
external interface to monitor motor rotation, speed or rotor locks
conditions easily. The FG provides magnetic change frequency while
the RD provides the rotor status.
The full bridge output stage uses “soft-switching” technique to
minimize the audible switching noise (vibration and acoustic noise)
and electromagnetic interference (EMI) providing a low noise solution.
FG/RD
1
6
VDD
GND
2
5
PWM
OUT1
3
4
OUT2
TSOT26F
Over-temperature shutdown provides thermal protection for the
device. An external DC voltage or a PWM (pulse-width modulation)
signal on the PWM pin can be used to control the motor speed.
The AH9485 and AH9486 are packaged in TSOT26F.
Applications
Features












Internal Full Bridge Driver
High Sensitivity Integrated Hall Sensor
Low and Wide Supply Voltage Range of 2V to 6V
Soft Switching for Low Noise
Rotor Lock Protection and Auto-Restart
DC Voltage or PWM Signal Speed Control
Thermal Protection
Tachometer FG Output(AH9485) or Rotor Lock Alarm RD Output
(AH9486)
Operating Temperature Range of -40ºC to +105ºC
Flat Pin TSOT26F Package
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Notes:




5V Low Noise BLDC Cooling Fans
Low Voltage / Low Power BLDC Motors
Notebook / VGA DC Fans / Blowers
Micro-Motors
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
AH9485/86
Document number: DS38108 Rev. 1 - 2
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AH9485/86
Typical Applications Circuit (Note 4)
R3
VPWM
Schottky Diode
0.2V
1KW
VDD
VDD
NEW PRODUCT
C1
2.2mF/5.5V
PWM
ZD1
5.5V
R1
4.7W
OUT2
D1
5
6
4
AH9485/86
R4
3
OUT1
10KW
FG/RD
2
GND
5V
FG/RD
1
R2
39W
Note 4:
Must use C1 capacitor for the decoupling between VDD and GND and place the capacitor as close to the IC as possible.
ZD1: VDD over-voltage stress protection diode.
R2: current limit resistor for Open Drain RD output.
R3: de-coupling resistor for long-distance signal transmission.
Pin Descriptions
Pin Number
Pin Name
1
FG/RD
2
GND
Ground pin
3
OUT1
Output pin 1
4
OUT2
Output pin 2
5
PWM
DC voltage or Pulse width modulation signal speed control pin
6
VDD
AH9485/86
Document number: DS38108 Rev. 1 - 2
Function
FG(AH9485) or RD(AH9486)
Power supply pin
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AH9485/86
Functional Block Diagram
PWM
VDD
5
Bias
Generator
6
PWM Control
NEW PRODUCT
3
Hall
Plate
Chopper
Amplifier
Digital
Control
Logic
Hysteresis
Comp
Soft-Switch
&
Output
Driver
VDD
4
Power On
Reset
Oscillator
Thermal
Shutdown
Protection
1
FG/RD
AH9485/86
Document number: DS38108 Rev. 1 - 2
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OUT1
OUT2
2
GND
September 2015
© Diodes Incorporated
AH9485/86
Absolute Maximum Ratings (Notes 5 and 6) (@TA=+25°C, unless otherwise specified.)
NEW PRODUCT
Symbol
Parameter
VDD
Supply Voltage
IOUTP
Rating
Unit
7
V
Peak Output Current
500
mA
IOUTC
Continuous Output Current
300
mA
VFG/RD
FG/RD Pull-up Voltage
7 or VDD
V
IFG/RD
FG/RD Current
20
mA
PD
Power Dissipation
520
mW
JA
Thermal Resistance ( Junction to Ambient)
141
ºC/W
-55 to +150
ºC
2000
V
TSTG
Storage Temperature
ESD
ESD (Human Body Model) (Note 7)
5. 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.
Note:
6. The absolute maximum VDD of 7V is a transient stress rating and is not meant as a functional operating condition. It is not recommended to operate the
device at the absolute maximum rated conditions for any period of time.
7. Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures
whenever handling semiconductor products.
Recommended Operating Conditions
Symbol
Parameter
VDD
Supply Voltage
TA
Ambient Temperature
Electrical Characteristics
Symbol
Min
Max
Unit
2
6
V
-40
+105
ºC
(@VDD = 5V, TA=+25°C, unless otherwise specified.)
Min
Typ
Max
Unit
Supply Current
–
–
1.8
3
mA
RDSON1
ON Resistance (RPMOS+RNMOS)
IOUT = 300mA
–
2
–
Ω
RDSON2
OUT1, OUT2 ON Resistance
TJ = +125ºC, IOUT = 300mA
–
3
–
Ω
VOL
FG/RD Output Low Voltage
IOL = 10mA
–
0.33
0.5
V
ILEAK
FG/RD Output Leakage Current
VFG(VRD) = 5V
–
0.15
10
μA
–
–
0.25
–
s
–
–
1.5
–
s
–
>0.5×VDD
–
VDD
V
–
0
–
<0.14×VDD
V
IDD
Parameter
tON
Locked Rotor Period
tOFF
PWMHIGH
PWM Voltage Range
PWMLOW
AH9485/86
Document number: DS38108 Rev. 1 - 2
Conditions
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AH9485/86
Magnetic Characteristics (@VDD =5V, TA=+25°C, unless otherwise specified.)
NEW PRODUCT
Symbol
Parameter
Min
Typ
Max
Unit
BOP
Operating Point
0
25
50
Gauss
BRP
Releasing Point
-50
-25
0
Gauss
BHYS
Hysteresis
–
50
–
Gauss
Magnetic Hysteresis Characteristics
OUT1 (V)
-25
0
OUT2 (V)
25
0
25
-25
Magnetic (Gauss)
Magnetic (Gauss)
OUT1 Output vs. Magnetism
OUT2 Output vs. Magnetism
Output Waveforms Description (Notes 8 and 9)
VDD
Re-Start Time
Shutdown Time
tON
tOFF
OUT1,
OUT2
FG
The voltage level depends on OUT1 pin’s voltage
level before lock-shutdown
RD
Notes:
8. RD and FG are open drain outputs and the high level of the signal depends on the external supply voltage.
9. The on torque time of motor is same as the re-start time.
AH9485/86
Document number: DS38108 Rev. 1 - 2
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AH9485/86
Test Circuit
R3
VPWM
1KW
C1
2.2mF
5
6
OUT2
PWM
VDD
R1
4.7W
4
RL
AH9485/86
2
3
OUT1
R2
5V
FG/RD
1
GND
NEW PRODUCT
5V
10KW
AH9485/86
Document number: DS38108 Rev. 1 - 2
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AH9485/86
Application Note (Notes 10, 11 and 12)
DC Supply Voltage Speed Control
Motor speed can be controlled by varying the VDD supply voltage while PWM pin is tied to VDD pin.
NEW PRODUCT
PWM Pin Speed Control
PWM (pulse width modulation) pin can be used to control the motor speed. There are two types of speed control using PWM pin:
a) DC Voltage Mode
b) Pulse Width Mode
a)
DC Voltage Mode PWM:
DC voltage signal (VPWM) on the PWM pin can be used to control the motor speed. Applying a DC voltage to the PWM pin will generate
an internal PWM pulses with the “ON” duty cycle based on the applied DC voltage according to the diagram below. The internal duty ratio
generated will change from 0% duty at VPWM = 0.14VDD typically to 100% at VPWM = 0.5VDD.
“ON”Ratio
100%
0%
0.14VDD
Notes:
0.5VDD
10. While using pulse mode PWM, the “High” value of the input pulse should be higher than 0.5×VDD and the “Low” value should be lower than 0.14×VDD.
11. The lower-limit for the PWM pulse frequency is 200Hz, and the recommended frequency range is higher than 30kHz where the PWM input pulses will
not generate acoustic noise.
12. The “PWM” pin contains an internal pull-up resistor, so the AH9485/86 will rotate at full-speed (100% ON) when this pin is left un-connected (floating).
b)
Pulse Mode PWM:
External PWM pulses can be applied directly to the PWM pin to control the speed. The AH9485/86 will pass this pulse to the coil driver
with the original duty-cycle ratio. While using pulse mode PWM, the “High” value of the input pulse should be higher than 0.5×VDD and the
“Low” value should be lower than 0.14×VDD. The lower-limit for the PWM pulse frequency is 200Hz, and the recommended frequency
range is higher than 30kHz to help prevent acoustic noise related to the switching.
Soft Switching
AH9485/86 use soft switching of the motor coil current during commutation to minimize audible switching noise and electromagnetic
Interference (EMI) to provide a low noise solution.
AH9485/86
Document number: DS38108 Rev. 1 - 2
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AH9485/86
Performance Characteristics
Supply Current IDD vs. Supply Voltage VDD
Supply Current IDD vs. Operating Temperature TA
2.4
5
2.3
4
2.2
IDD (mA)
IDD (mA)
2.1
2
2.0
1
VDD=5V
1.9
0
1
2
3
4
5
No MAGN
Have MAGN
1.8
-50
0
6
-25
0
25
50
75
100
125
150
O
TA ( C)
VDD (V)
Operating Switch Points BOP, BRP & BHYS vs.
Supply Voltage VDD
Operating Switch Points BOP, BRP & BHYS vs.
Operating Temperature TA
60
BOP/BRP/BHYS (GS)
BOP/BRP/BHYS (GS)
40
20
TA=25C
BOP
BRP
0
40
20
VDD=5V
BOP
BRP
0
BHYS
BHYS
-20
-20
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
-50
-25
0
25
VDD (V)
50
75
100
125
O
TA ( C)
High+Low Side RDS(ON) vs. Supply Voltage VDD
High+Low Side RDS(ON) vs. Operating Temperature TA
1.60
TA= 25C
2.5
1.55
IOUT=300mA
VDD=5V
IO=300mA
RDS(ON) (W)
1.50
RDS(ON) (W)
NEW PRODUCT
3
2.0
1.45
1.40
1.5
1.35
1.30
1.0
2.0
2.5
3.0
3.5
4.0
4.5
-50
5.0
AH9485/86
Document number: DS38108 Rev. 1 - 2
-25
0
25
50
75
100
125
T A ( C)
O
VDD (V)
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AH9485/86
Ordering Information
Product Version
Package
Packing
5: AH9485
6: AH9486
WUF: TSOT26F
7: 7" Tape & Reel
7” Tape and Reel
Part Number
Package Code
Packaging
Quantity
Part Number Suffix
AH9485-WUF-7
WUF
TSOT26F
3000/Tape & Reel
-7
AH9486-WUF-7
WUF
TSOT26F
3000/Tape & Reel
-7
Marking Information
(Top View)
5
6
4
7
NEW PRODUCT
AH948X – XXX – X
XX Y W X
1
AH9485/86
Document number: DS38108 Rev. 1 - 2
2
3
XX : Identification Code
Y : Year 0~9
W : Week : A~Z : 1~26 Week;
a~z : 27~52 Week;
z Represents 52 and 53 Week
X : Internal Code
Part Number
Package
Identification Code
AH9485-WUF-7
TSOT26F
H5
AH9486-WUF-7
TSOT26F
H6
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AH9485/86
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
(1)
Package Type: TSOT26F
D
E1
E
SEE VIEW C
e
b
c
e1
0 (4x)
VIEW C
A2a
A2b
L
Min
Max
Typ
A
0.700 0.800 0.750
A2a
0.325 0.375 0.350
A2b
0.375 0.425 0.400
b
0.425 0.475 0.450
c
0.150 0.200 0.175
D
2.850 2.950 2.900
E
3.750 3.850 3.800
E1
1.550 1.650 1.600
e
0.950 BSC
e1
1.900 BSC
L
1.100 BSC
4°
12° 10°
θ
All Dimensions in mm
A
0 (4x)
Min/Max(in mm)
1.1/1.3
PART MARKING
SURFACE
0.85/1.05
Hall Sensor
0.45/0.55
Die
0.7/0.8
NEW PRODUCT
TSOT26F
Dim
PIN1
Sensor Location
AH9485/86
Document number: DS38108 Rev. 1 - 2
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AH9485/86
Mechanical Structure
Rotor
NEW PRODUCT
Magnet
Rotor Height h1
h2 Vertical Height
PCB
PCB Thickness
h3
PCB
h4
Soldering Thickness
IC Ink View
Suggested Pad Layout
Please see AP02001 at http://www.diodes.com/datasheets/ap02001.pdf for the latest version.
(1)
Package Type: TSOT26F
X
C
Y
Dimensions
C
X
X1
Y
Y1
Y1
Value
(in mm)
0.950
0.700
2.600
1.000
4.220
X1
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Document number: DS38108 Rev. 1 - 2
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AH9485/86
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NEW PRODUCT
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written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:
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Copyright © 2015, Diodes Incorporated
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AH9485/86
Document number: DS38108 Rev. 1 - 2
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