TDA5143T Datasheet, PDF (2/20 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5143T
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 0.85 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 TDA5143T 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 as well as other applications (e.g.
laser beam printer).
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
SYMBOL
PARAMETER
CONDITIONS
V_P
V_VMOT
V_DO
I_LIM
supply voltage
input voltage to the output
driver stages
drop-out output voltage
current limiting
note 1
note 2
I_O = 100 mA
V_VMOT = 10 V; R_O = 5.9 Ω
Notes
1. An unstabilized supply can be used.
2. V_VMOT = V_P; +AMP IN = −AMP IN = 0 V; all outputs I_O = 0 mA.
MIN.
4
1.7
TYP.
−
−
MAX.
18
16
UNIT
V
V
−
0.93 1.05 V
0.7
0.85 1.0
A
ORDERING INFORMATION
TYPE NUMBER
TDA5143T
PINS
20
PACKAGE
PIN POSITION
SOL
MATERIAL
plastic
CODE
SOT163-1
June 1994
2