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