TDA5140A Datasheet, PDF (2/24 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5140A
FEATURES
• Full-wave commutation (using push/pull drivers at the
output stages) without position sensors
• Built-in start-up circuitry
• Three push-pull outputs:
– 0.8 A output current (typ.)
– low saturation voltage
– built-in current limiter
• Thermal protection
• Flyback diodes
• Tacho output without extra sensor
• Position pulse stage for phase-locked-loop control
• Transconductance amplifier for an external control
transistor.
APPLICATIONS
• VCR
• Laser beam printer
• Fax machine
• Blower
• Automotive.
GENERAL DESCRIPTION
The TDA5140A 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.
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
SYMBOL
V_P
V_VMOT
V_DO
I_LIM
PARAMETER
supply voltage
input voltage to the output
driver stages
drop-out output voltage
current limiting
CONDITIONS
note 1
note 2
MIN.
4
1.7
I_O = 100 mA
−
V_VMOT = 10 V; R_O = 3.9 Ω 0.7
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.
TYP.
−
−
0.93
0.8
MAX.
18
16
1.05
1
UNIT
V
V
V
A
ORDERING INFORMATION
EXTENDED TYPE NUMBER
TDA5140A
TDA5140AT
PINS
18
20
PACKAGE
PIN POSITION
DIL
SOL
MATERIAL
plastic
plastic
CODE
SOT102
SOT163A
April 1994
2