BCDSEMI AM9799MM-G1

Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
General Description
Features
The AM9799 is a single-phase DC brushless motor
driver IC featuring BiCMOS process. It is suitable for
fan motor drivers for low voltage equipment such as
the note personal computers. The AM9799 includes
lock shutdown, automatic restart, frequency generator
(FG), have been incorporated into one chip. When the
motor is under lock condition, lock shutdown
function turns off the output current. When the lock
condition is removed, the IC automatically restarts
and allows DC fan to run. In addition, the FG
function is to output rotation speed signal. It features
MOS-FET driver circuit for better saturation
characteristics. Slew late of amplifiers and feedback
resistors are optimized to achieve low-noise motor
operation.
•
The AM9799 is available in MSOP-8 package.
•
•
•
•
•
•
•
•
Lock Detection and Rotational Speed Sensing
Mechanisms are Built-in
Rotor-locked Protection and Automatic Restart
When the Motor Lock is Undone
Hall Bias Built-in and Hall Inputs Have a
Hysteresis
Built-in Thermal Shutdown Circuit
Built-in Over Current Protection
Operating Voltage: VCC=2V to 6V
BiCMOS Technology
Compact Package: MSOP-8
Applications
CPU Cooler
Computers
Fan
in
Notebook
Personal
MSOP-8
Figure 1. Package Type of AM9799
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
1
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Pin Configuration
MM Package
(MSOP-8)
OUT2
1
8
GND
H+
2
7
OUT1
HB
3
6
VCC
H-
4
5
FG
Figure 2. Pin Configuration of AM9799 (Top View)
Pin Description
Pin Number
Pin Name
1
OUT2
2
H+
Hall input(+)
3
HB
Hall bias
4
H-
Hall input(-)
5
FG
Frequency generator
6
VCC
Power supply
7
OUT1
Driver out1
8
GND
Ground
Sep. 2009
Function
Driver out2
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
2
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Functional Block Diagram
Figure 3. Functional Block Diagram of AM9799
Ordering Information
AM9799
-
G1: Green
Circuit Type
TR: Tape & Reel
Blank: Tube
Package
MM: MSOP-8
Package
Temperature Range
MSOP-8
-40 to 105°C
Part Number
Marking ID
Packing Type
AM9799MM-G1
AM9799MM-G1
Tube
AM9799MMTR-G1
AM9799MM-G1
Tape & Reel
BCD Semiconductor's Pb-free products, as designated with "G1" suffix in the part number, are RoHS
compliant and green.
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
3
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Absolute Maximum Ratings (TA=25°C, Note 1)
Parameter
Symbol
Value
Unit
Supply Voltage
VCC
7
V
Output Current
IO (max)
1
A
FG Output Current
IFG
5
mA
FG Output Voltage
VFG
7
V
260
°C
Lead Temperature (Soldering 10s)
Power Dissipation
PD
585
mW
Junction Temperature
TJ
150
°C
Thermal Resistance (Die to Ambient)
θJA
214
°C/W
Storage Temperature Range
TSTG
-55 to 150
°C
ESD (Human Body Model) (Note 2)
ESD
2000
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.
Note 2: Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe
Electro Static Discharge control procedures whenever handling semiconductor products.
Recommended Operating Conditions (TA=25°C)
Parameter
Symbol
Min
Max
Unit
Supply Voltage
VCC
2
6
V
Hall Input Voltage Range
VH
0.4
VCC -1.1
V
Operating Temperature
TOP
-40
105
°C
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
4
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Electrical Characteristics
VCC =5V, TA=25°C, unless otherwise specified.
Parameter
Symbol
Supply Current
Conditions
Min
ICC
Input Offset Voltage
Typ
Max
Unit
4
6
mA
±4
mV
0.3
0.45
V
48
50
dB
0.3
V
VHOFS
IO=250mA
upper and lower total
Output Saturation Voltage
VO
Input-output Gain
GIN
FG Low Voltage
VFGL
Input Hysteresis Voltage
VHYS
±6
±10
±15
mV
Lock Detection ON time
TON
0.35
0.5
0.7
sec
Lock Detection OFF time
TOFF
3.5
5
7
sec
Hall Bias Voltage
VHB
1.15
1.3
1.45
V
45
IFG=3mA
IHB=5mA
Typical Performance Characteristics
Power Dissipation (mW)
800
600
400
200
0
-25
0
25
50
75
100
125
150
o
Ambient Temperature ( C)
Figure 4. Power Dissipation vs. Ambient Temperature
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
5
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Thermal Shut Down (TSD)
This IC is built-in TSD. TSD has the temperature hysteresis.
Output
ON
TSD
OFF
TSD
ON
Output
OFF
150ºc
175ºc
TSD ON (Typ. 175°C ) All output transistor OFF.
TSD OFF (Typ. 150°C) Reset ordinary motion.
(It has the temperature hysteresis of 25°C <TYP>)
Figure 5. Thermal Shut Down
Lock Detection, Automatic Restart Circuit
This IC detects the rotation of the motor by hall signal, and adjusts lock detection ON time (Ton) and lock
detection OFF time (Toff) by the internal counter. These time (Ton, Toff) are showed below.
H+
OUT1
TON
TOFF
OUT2
FG
Lock Reset
Cancel Motion
Motor
Lock
Ordinary
Figure 6. The Function of Rotor-locked Protection and Auto Restart Diagram of AM9799
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
6
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Typical Application
Figure 7. Typical Application of AM9799
Sep. 2009
Rev. 1. 0
BCD Semiconductor Manufacturing Limited
7
Preliminary Datasheet
Single Phase Full-wave Low Voltage Fan Motor Driver
AM9799
Mechanical Dimensions
MSOP-8
Sep. 2009
Rev. 1. 0
Unit: mm(inch)
BCD Semiconductor Manufacturing Limited
8
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