Product Brief
BTL Drive Single-phase Full-wave Fan Motor Driver
Description
The AM4951/R/2 series is a single-phase BTL
output fan motor driver designed by bipolar
process. This IC features high efficiency, silent
operation and includes lock shutdown and
automatic restart functions. When the motor is
under lock condition, the lock shutdown function
turns off the output current. When the
lock condition is removed, the IC will
restart automatically and allow DC fan to run. It is
applied for high reliability and low noise
application, such as personal computers, notebook,
car audio, CPU cooling systems and power
supplies in consumer electronics systems.
The AM4951/R series is available in MSOP-8
(12V application only) or PSOP-8 (24V
application only) package. The AM4952 is
available in MSOP-10 package.
AM4951/R/2
Parametric Table
(V
CC
=12V, T
A
=25
o
C, unless otherwise noted.)
Supply Current 1 (mA) (V
CT
=L)
Supply Current 2 (mA) (V
CT
=H)
Out Low Saturation Voltage (V)
Out High Saturation Voltage (V)
Hall Input Sensitivity (mV)
FG Low Level Voltage (V)
(For AM4951/2)
RD Low Level Voltage (V)
(For AM4951R/2)
HB Voltage (V)
(For AM4952)
6
5
0.25
0.95
7
0.15
0.15
1.5
Features
•
•
•
•
•
•
•
•
•
BTL
Output
Single-phase
Full-wave
Linear Drive (Gain Resistor=1k to 360kΩ,
Gain=51dB)
Support Low-voltage Drive and Feature a
Wide Usable Voltage Range (2.2V to 24V)
Low Saturation Output (High Side and Low
Side Saturation Voltage): V
SAT_TOTAL
=1.2V
(typical, I
OUT
=250mA)
Built-in Lock Protection and Automatic
Restart Circuits
Built-in FG/RD Output
Built-in Hall Sensor Bias (AM4952 Only,
V
HB
=1.5V)
Thermal Protection Circuit
Small-sized, High Thermal Capacity Package
FG Output (AM4951),
RD Output
(AM4951R), FG and RD Output (AM4952)
Benefits
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•
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Wide Operation Voltage Range
Soft-switching for Low Noise
Over Temperature Protection
High ESD and Reliability Process
Additional Available Materials
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Samples
Data Sheet
Reliability Report
ESD Report
Applications
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•
•
Notebook, Personal Computers
Power Supplies in Consumer Electronics, Car
Audio and Office Peripherals
CPU Cooling Systems
Jun. 2010
1
BCD Semiconductor Manufacturing Limited
BCDSEMI [ BCD SEMICONDUCTOR MANUFACTURING LIMITED ]
