MOTOR DRIVER. AH9485 Datasheet

AH9485 DRIVER. Datasheet pdf. Equivalent

AH9485 Datasheet
Recommendation AH9485 Datasheet
Part AH9485
Description SINGLE PHASE LOW NOISE SMART MOTOR DRIVER
Feature AH9485; NEW PRODUCT AH9485/86 SINGLE PHASE LOW NOISE SMART MOTOR DRIVER Description Pin Assignments The .
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Diodes AH9485
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.
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.
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.
(Top View)
Pin 1 Mark
FG/RD 1
GND 2
OUT1 3
6 VDD
5 PWM
4 OUT2
TSOT26F
The AH9485 and AH9486 are packaged in TSOT26F.
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)
Applications
5V Low Noise BLDC Cooling Fans
Low Voltage / Low Power BLDC Motors
Notebook / VGA DC Fans / Blowers
Micro-Motors
Notes:
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
1 of 12
www.diodes.com
September 2015
© Diodes Incorporated



Diodes AH9485
Typical Applications Circuit (Note 4)
VPWM
Schottky Diode
0.2V
VDD
D1
R1
4.7W
R3
1KW
ZD1
5.5V
C1
2.2mF/5.5V
5V
FG/RD
R2
10KW
R4
39W
654
AH9485/86
12
3
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.
AH9485/86
Pin Descriptions
Pin Number
1
2
3
4
5
6
Pin Name
FG/RD
GND
OUT1
OUT2
PWM
VDD
Function
FG(AH9485) or RD(AH9486)
Ground pin
Output pin 1
Output pin 2
DC voltage or Pulse width modulation signal speed control pin
Power supply pin
AH9485/86
Document number: DS38108 Rev. 1 - 2
2 of 12
www.diodes.com
September 2015
© Diodes Incorporated



Diodes AH9485
AH9485/86
Functional Block Diagram
Bias Generator
PWM
5
PWM Control
VDD
6
3
OUT1
Hall
Plate
Chopper
Amplifier
Hysteresis
Comp
Digital
Control
Logic
Soft-Switch
&
Output
Driver
Power On
Reset
Oscillator
Thermal
Shutdown
Protection
1
FG/RD
VDD
4 OUT2
2
GND
AH9485/86
Document number: DS38108 Rev. 1 - 2
3 of 12
www.diodes.com
September 2015
© Diodes Incorporated





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