Issue Number │001
June 2016
New Product
Announcement
AM9468/AM9469
Single Phase Full Wave Direct PWM Motor Driver
AM9468/9 are high-performance,
low-noise, single-phase (single
coil), brushless direct current
(BLDC) driver solutions for fans
and motors. The integrated fullbridge driver output stage uses a
BTL linear driver architecture to
minimize audible switching noise
and electromagnetic interference
(EMI) providing a low noise
solution.
For system flexibility, motor speed
can be controlled by an external
PWM signal, a DC voltage or from
a thermistor network. Based on the
input signal, AM9468/9 adjusts the
output duty cycle.
To help protect the motor coil,
AM9468/9 provides Rotor Lock
Protection which shuts down the
output drive if rotor lock is
detected. The device automatically
re-starts when the rotor lock is
removed. In case of overvoltage,
the device shuts down the output
drive and enters standby mode to
help prevent overvoltage stress on
the coil. Overtemperature
shutdown provides safe thermal
protection.
AM9468 is packaged in powercapable, low profile TSSOP-16;
AM9469 in thermally-enhanced
TSSOP-16EP with exposed pad.
The Diodes Advantage
AM9468/69 provide highly integrated, ultra low noise, high performance, yet simple
solutions for a wide range of cooling fans and motor drive applications
 Hall Sensor Bias Voltage, Amplifier, Voltage Reference and H-Bridge Switch
- The Hall input signals are amplified to drive BTL output structure to achieve ultra low
noise
- Integrate H-Bridge power switches capable of continuous motor current of 500mA
(AM4968) OR 750mA (AM4969)
- Minimal external component helps to reduce PCB area and system cost
 Speed Control by PWM Input Signal , DC Voltage or Vdd Supply
- Flexible speed control by an external PWM signal, by adjusting the DC signal voltage
on the PWM pin or the supply voltage
 Lock Detect, Shutdown and Automatic Restart
- Helps protect coil from overheating or burning during rotor lock
 Thermal Shutdown
- Provides safe, reliable and robust operation
- Thermal shutdown helps to protect coil, component and PCB
 Power Capable, Low Profile TSSOP16 and Thermally Enhanced TSSOP16-EP
Packages Operating Temperature Range -40oC to +105oC
- Suitable for thermally demanding, enclosed cooling fan applications
Circuit Functions


CPU Cooler Fans in PCs
12V Brushless DC cooling fans, extractors and pumps
www.diodes.com
Issue Number │001
June 2016
New Product
Announcement
AM9468/AM9469
Typical Application Schematic
Product Portfolio

Part
Avg.
Supply
Peak Reference
Operating
Output
Hall
Current
Motor
Voltage
Voltage
Drive
Bias
(No Load)
Current Output
Current
Voltage
Speed
Control
Lock
Speed
Detect,
Min
Control
Shutdown
Speed
Slope
and
Setting
Adjust
AutoRestart
FG /
RD
Protection
Features
(mA)
(mA)
(mA)
(V)
AM9789
2 to 6
1.8
--
1,000
--
1.3
PWM
--
--
Yes
FG
TSD, OCP
AM9799
2 to 6
4
1,000
--
1.3
VDD
--
--
Yes
FG
TSD, OCP
1,000
6
1.25
PWM, VDD
--
Yes
Yes
FG, RD TSD, OCL
1,000
--
1.25
Yes
Yes
Yes
FG, RD TSD, OCL
1,000
--
--
Yes
Yes
Yes
FG/RD
1,000
--
--
Yes
Yes
Yes
FG/RD
AM4961 3.5 to 16
8
AM4962 3.5 to 16
8
AM4963
3.5 to 16
/R
8
AM4964 3.5 to 16
8
AM4953 2.2 to 16
4
AM4951
2.2 to 24
/R
5
AM4952 2.2 to 24
5
AM9468 2.4 to 18
2.5
AM9469 2.4 to 18
2.5
---
--
--
--
-1.45
---
800
--
500
--
--
500
--
1.5
500
1,200
5
1.25
750
1,200
5
1.25
--
Ordering information


PWM, VDD,
Slope Adjust
PWM
+Temp,
VDD,
Slope Adjust
PWM
+Temp,
VDD,
Slope Adjust
VDD
BTL Linear
VDD
BTL Linear
VDD
BTL Linear
PWM ,DC
Voltage or
Vdd
PWM ,DC
Voltage or
Vdd
Package
o
(V)
--
Temp
Range
( C)
-40 to
+105
MSOP8
-40 to
+105
-30 to
+90
-30 to
+90
HTSSOP14
SSOP16
HTSSOP14
SSOP16
TSD
-30 to
+90
HTSSOP14
SSOP16
TSD
-30 to
+90
HTSSOP14
SSOP16
-40 to
+105
--
--
Yes
FG, RD
TSD
--
--
Yes
FG, RD
TSD
--
--
Yes
FG, RD
TS
Yes
Yes
Yes
FG/RD TSD, OCP
-40 to
+105
Yes
Yes
Yes
FG/RD TSD, OCP
-40 to
+105
-40 to
+105
-40 to
+105
Device
Packaging
Reel size
Tape width
Quantity
AM9468-T16-13
TSSOP-16
13”
12mm
2.5k
AM9469-T16E-13
TSSOP-16EP
13”
12mm
2.5k
www.diodes.com
MSOP8
MSOP8
MSOP10,
SSOP10,SO8
,
PSOP8
MSOP8
PSOP8 (EP)
MSOP10
TSSOP-16
TSSOP-16EP