INTEGRATED CIRCUITS
TDF5140A
Brushless DC motor drive circuit
Product specification
1999 March 15
Philips
Semiconductors
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
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.
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
SYMBOL
V
P
V
VMOT
V
DO
I
LIM
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.
ORDERING INFORMATION
PACKAGE
EXTENDED TYPE NUMBER
PINS
TDF5140A
18
PIN POSITION
DIL
MATERIAL
plastic
PARAMETER
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
= 3.9
Ω
CONDITIONS
4
1.7
−
0.7
MIN.
−
−
0.93
0.8
TYP.
GENERAL DESCRIPTION
APPLICATIONS
•
VCR
•
Laser beam printer
•
Fax machine
•
Blower
•
Automotive.
TDF5140A
The TDF5140A 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.
MAX.
18
20
1.05
1
V
V
V
A
UNIT
CODE
SOT102
1999 March 15
2
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
BLOCK DIAGRAM
TDF5140A
AMP OUT
15
−AMP
IN
+AMP
IN
13
14
TRANS-
CONDUCTANCE
AMPLIFIER
VMOT
4
CAP-ST
11
START-UP
OSCILLATOR
DH
PUSH/PULL
FLYBACK
1
MOT1
CAP-DC
CAP-CD
10
9
ADAPTIVE
COMMUTATION
DELAY
DL
OUTPUT
DRIVER
STAGE 1
TEST
2
THERMAL
PROTECTION
TIMING
COMMUTATION
LOGIC
3
CAP-TI
12
DIVIDE
BY 2
OUTPUT DRIVER
STAGE 2
ROTATION
POSITION
SPEED
&
DETECTOR
OUTPUT
STAGE
MOT2
PG/FG
6
POSITION
DETECTOR
STAGE
OUTPUT DRIVER
STAGE 3
16
MOT3
TDF5140A
17
EMF COMPARATORS
5
PGIN
7
GND2
18
GND1
8
MGH313
MOT0
VP
Fig.1 Block diagram
1999 March 15
3
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
PINNING
SYMBOL
MOT1
TEST
MOT2
VMOT
PG IN
PG/FG
GND2
V
P
CAP-CD
CAP-DC
CAP-ST
CAP-TI
+AMP IN
−AMP
IN
AMP OUT
MOT3
MOT0
GND1
PIN
DIL18
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
driver output 1
test input/output
driver output 2
input voltage for the output driver stages
position generator: input from the position detector sensor to the position
detector stage (optional); only if an external position coil is used
DESCRIPTION
TDF5140A
position generator/frequency generator: output of the rotation speed and position
detector stages (open collector digital output, negative-going edge is valid)
ground supply return for control circuits
positive supply voltage
external capacitor connection for adaptive communication delay timing
external capacitor connection for adaptive communication delay timing copy
external capacitor connection for start-up oscillator
external capacitor connection for timing
non-inverting input of the transconductance amplifier
inverting input of the transconductance amplifier
transconductance amplifier output (open collector)
driver output 3
input from the star point of the motor coils
ground (0 V) motor supply return for output stages
1999 March 15
4
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
TDF5140A
MOT1
TEST
MOT2
VMOT
PG IN
PG/FG
GND2
Vp
CAP-CD
1
2
3
4
5
6
7
8
9
18 GND1
17 MOT0
16 MOT3
15 AMP OUT
TDF5140A
14 -AMP IN
13 +AMP IN
12 CAP-TI
11 CAP-ST
10 CAP-DC
MGH311
Fig.2 Pin configuration
FUNCTIONAL DESCRIPTION
The TDF5140A offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor
drive and full-wave drive. The TDF5140A offers protected outputs capable of handling high currents and can be used
with star or delta connected motors. It can easily be adapted for different motors and applications. The TDF5140A offers
the following features:
•
Sensorless commutation by using the motor EMF.
•
Built-in start-up circuit.
•
Optimum commutation, independent of motor type or motor loading.
•
Built-in flyback diodes.
•
Three phase full-wave drive.
•
High output current (0.8 A).
•
Outputs protected by current limiting and thermal protection of each output transistor.
•
Low current consumption by adaptive base-drive.
•
Accurate frequency generator (FG) by using the motor EMF.
•
Amplifier for external position generator (PG) signal.
•
Suitable for use with a wide tolerance, external PG sensor.
•
Built-in multiplexer that combines the internal FG and external PG signals on one pin for easy use with a controlling
microprocessor.
•
Uncommitted operational transconductance amplifier (OTA), with a high output current, for use as a control amplifier.
1999 March 15
5
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