Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor
General Description
The AM9789 is a single-phase, full wave motor
driver suited for DC fan motor, and its speed is
controlled by PWM input signal. It is suitable for
both game machine and CPU cooler which need
silent drivers. It features lock protection, thermal
shutdown, PWM control, low noise and so on.
The AM9789 is available in MSOP-8, MSOP-10
DFN-3×3-8 and DFN-3×3-10 packages.
AM9789
Features
•
•
•
•
•
•
•
•
•
•
•
BTL Output Single-phase Full-wave Linear
Driver
Silent Driver
Low Supply Current (Normal Operation，Less
than 4mA)
Low Standby Current (PWM=0 Duty) @
Supply Current Less than 200µA
Speed Controllable by PWM Input Signal
Built-in Quick Start Function
Built-in Lock Protection and Auto Restart
Function
Built-in Hall Bias Circuit
Built-in FG Output
Built-in Thermal Shutdown Circuit
Built-in Over Current Protection Circuit
Applications
•
Silent Fan Motors
MSOP-8
MSOP-10
DFN-3×3-8
DFN-3×3-10
Figure 1. Package Types of AM9789
Oct. 2012
Rev. 1. 1
1
BCD Semiconductor Manufacturing Limited
Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor
Pin Configuration
M8 Package
(MSOP-8)
1
2
3
4
8
7
6
5
1
2
3
4
5
AM9789
MM Package
(MSOP-10)
10
9
8
7
6
DN8 Package
(DFN-3×3-8)
Pin 1 Mark
1
2
DN Package
(DFN-3×3-10)
Pin 1 Mark
1
2
3
4
8
7
6
5
10
9
8
7
6
3
4
5
Figure 2. Pin Configuration of AM9789 (Top View)
Pin Description
Pin Number
MSOP-10/
DFN-3×3-10
1
MSOP-8/
DFN-3×3-8
1
Pin Name
OUT2
NC
HIN+
HB
HIN-
FG
PWM
VCC
OUT1
GND
Output Connection 2
No connected
Function
2
3
4
5
6
7
8
9
10
Oct. 2012
Rev. 1. 1
3
4
5
6
2
7
8
Hall input(+). Connect to Hall element positive output
Hall bias
Hall input(-). Connect to Hall element negative output
Rotation speed output
PWM signal input terminal
Power supply
Output Connection 1
Ground
BCD Semiconductor Manufacturing Limited
2
Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor
Functional Block Diagram
AM9789
Figure 3. Functional Block Diagram of AM9789
Oct. 2012
Rev. 1. 1
3
BCD Semiconductor Manufacturing Limited
Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor
Ordering Information
AM9789
-
AM9789
Circuit Type
Package
M8: MSOP-8
MM: MSOP-10
DN8: DFN-3×3-8
DN: DFN-3×3-10
Package
MSOP-10
MSOP-8
-40 to 105°C
DFN-3×3-8
DFN-3×3-10
AM9789DN8TR-G1
AM9789DNTR-G1
B6E
BFD
G1: Green
TR: Tape & Reel
Temperature Range
Part Number
AM9789MMTR-G1
AM9789M8TR-G1
Marking ID
9789MM-G1
9789M8-G1
Packing Type
Tape & Reel
Tape & Reel
Tape & Reel
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS compliant
and green.
Oct. 2012
Rev. 1. 1
4
BCD Semiconductor Manufacturing Limited
Data Sheet
Single Phase Full-wave Motor Driver for Silent Fan Motor
Absolute Maximum Ratings (T
A
=25°C, Note 1)
Parameter
Supply Voltage
Output Current
Output Voltage
HB Output Current
FG Output Voltage
FG Output Sink Current
Operation Temperature
Storage Temperature Range
Lead Temperature (Soldering 10s)
Thermal Resistance
Ambient)
(Junction
to
AM9789
Symbol
V
CC
I
OUT
V
OUT
I
HB
V
FG
I
FG
T
OP
T
STG
T
LEAD
Value
10
1
10
10
10
10
-40 to 125
-55 to 150
260
MSOP-8
205
195
71
71
48
46
48
48
585
585
1760
1760
MSOP-10
DFN-3x3-8
DFN-3x3-10
MSOP-8
MSOP-10
DFN-3x3-8
DFN-3x3-10
MSOP-8
MSOP-10
DFN-3x3-8
DFN-3x3-10
4000
400
Unit
V
A
V
mA
V
mA
°C
°C
°C
θ
JA
°C/W
Thermal Resistance (Junction to Case)
θ
JC
°C/W
Power Dissipation
P
D
mW
ESD (Human Body Model)
ESD (Machine Model)
V
V
Note 1: 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.
Recommended Operating Conditions (T
A
=25°C)
Parameter
Supply Voltage
Hall Input Voltage Range
Operating Ambient Temperature
Symbol
V
CC
V
HB
T
A
Min
2
0.4
-40
Max
6
V
CC
-1.1
105
Unit
V
V
°C
Oct. 2012
Rev. 1. 1
5
BCD Semiconductor Manufacturing Limited
