www.diodes.com
Issue Number │001
October 2015
New Product
Announcement
AH9485/AH9486
The Diodes’ Advantage
A H9485 and A H9486 - Single Phase, A ll-In-One, Low Noise
Smart Motor Dri ver Famil y
AH9485/86 are single-chip motor -
driver ICs with an integrated H-
Bridge switch and high-sensitivity
Hall sensors for driving of small
low-profile, single-c oil, brushless
DC motors and cooling fans. The
output stage “soft switching”
minimizes acoustic switching
noise and electromagnetic
interference (EMI) providing a low
noise solution.
For system flexibility the family
off ers versatile DC Voltage- and
PWM speed control options.
AH9485/86 feature rotor lock
detect, shutdown and automatic
restart.
AH9485 features an open-drain
Frequency Generator tachometer
(FG) output, while AH9486 has a
Rotation Detect alarm (RD) output,
both to interface externally to
monitor speed and rotation status.
AH9485/86 are packaged in the
flat-pin TSOT26F package to help
place the device in a PCB cut-out
to minimize overall com ponent
height.
Applications
5V BLDC cooling fans, motors, extractor s and pumps
Notebook and desktop PCs cooling fans and blowers
Instrumentation and equipment power supply cooling fans
AH9485/86 provides highly integrat ed, high perform ance, yet simple solut ions f or
a wide range of cool ing f ans and motor dr ive appl ic at ions .
Built-in Hall sensor , amplifier, vol tage r eference and H-Bri dge swi t ch
- Highly i ntegrat ed solution significantly reduces external components, PCB ar ea
and placement c os ts
- Low temper ature coefficient of hall sensor provides stable sol ution
- Low R
DS(ON)
H-Bridge s wi t ches is capable of 500mA peak c ur r ents
Speed control by DC Voltage or PWM input signal
- Flexible speed c ont rol by an external PWM signal, by adjusti ng the D C signal
voltage on t he PWM pin or the s upply vol tage
Lock detect, shutdow n and automatic rest art with tachometer FG output
or Rotor Lock Alarm RD Opt ion
- Helps protect coil from over-heati ng or burning during r otor loc k.
- AH9485 featur es FG pi n; AH9486 feat ures RD pin to allow external i nter f ac e to
monitor motor s peed and r ot ati on st at us
Thermal shutdown
- Helps to protect the coil and the device - Saf e, rel iabl e and robus t oper ati on
Operat ing t emper at ur e range -40
o
C to +105
o
C
Suitable f or ther mal ly dem anding, enc l osed c ool ing f an appl ic ati ons .
www.diodes.com
Issue Number │001
October 2015
New Product
Announcement
AH9485/AH9486
Electrical Characteristics
Ty pical A pplications Circuit
Ordering Information
Part
Operating
Voltage
Supply
Current
(No
Load)
Average
Output
Drive
Current
Peak
Motor
Current
Operating
Point Bop
Release
Point Brp
Soft-
Switch
Speed
Control
Lock
Detect,
Shutdown
and
Auto-
Restart
FG /
RD
Temp
Range
(V) (mA)
(mA) (mA)
(Gauss) (Gauss)
(
o
C)
Min Typ Max Min Typ Max
AH9485
2 to 6.5 1.8 300 500 - 25 50 -50 -25 - Yes
PWM,
VDD
Yes FG -40 to +105
AH9486
2 to 6.5 1.8 300 500 - 25 50 -50 -25 - Yes
PWM,
VDD
Yes RD -40 to +105
6
5
4
OUT2
1
2 3
OUT1
GND
V
DD
PWM
10
KΩ
R2
5
V
AH9485/86
V
PWM
F
G
/
R
D
1KΩ
R3
4
.7Ω
2.2µF/5.5V
V
DD
R1
C1
Schottky Diode
0.2V
ZD
1
5.5V
D1
R
4
39Ω
FG
/RD
Device Packaging
Reel Size or
Bulk
Tape Width Quantity
AH9485-WUF-7 TSOT26F 7” 8mm 3k
AH9486-WUF-7 TSOT26F 7” 8mm 3k