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TDA5144AT Datasheet(PDF) 2 Page - NXP Semiconductors

Part # TDA5144AT
Description  Brushless DC motor drive circuit
PDF  20 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

TDA5144AT Datasheet(HTML) 2 Page - NXP Semiconductors

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June 1994
2
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
TDA5144
FEATURES
• Full-wave commutation (using push/pull drivers at the
output stages) without position sensors
• Built-in start-up circuitry
• Three push-pull outputs:
– output current 2.0 A (typ.)
– low saturation voltage
– built-in current limiter
– soft-switching outputs for low Electromagnetic
Interference (EMI)
• Thermal protection
• Flyback diodes
• Tacho output without extra sensor
• Transconductance amplifier for an external control
transistor.
APPLICATIONS
• General purpose spindle driver (e.g. for hard disk)
• Laser beam printer.
GENERAL DESCRIPTION
The TDA5144 is a bipolar integrated circuit used to drive
3-phase brushless DC motors in full-wave mode. The
device is sensorless (saving of 3 hall-sensors) using the
back-EMF sensing technique to sense the rotor position.
A special circuit is built-in to reduce the EMI (soft switching
output stages). It is ideally suited as a drive circuit for hard
disk drive spindle motor requiring powerful output stages
(current limit of 2.0 A). It can also be used in e.g. laser
beam printer and other applications.
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
Notes
1. An unstabilized supply can be used.
2. VVMOT = VP; +AMP IN = −AMP IN = 0 V; all outputs IO = 0 mA.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
supply voltage
note 1
4
−
18
V
VVMOT
input voltage to the output
driver stages
note 2
1.7
−
16
V
VDO
drop-out output voltage
IO = 100 mA
−
0.90
1.05
V
ILIM
current limiting
VVMOT = 10 V; RO = 1.2 Ω
1.8
2.0
2.4
A
TYPE NUMBER
PACKAGE
PINS
PIN POSITION
MATERIAL
CODE
TDA5144AT
20
SOL
plastic
SOT163-1
TDA5144T
28
SOL
plastic
SOT136-1



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