TDA5142T Datasheet, PDF (5/20 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5142T
Fig.2 Pin configuration.
FUNCTIONAL DESCRIPTION
The TDA5142T offers a sensorless three phase motor
drive function. It is unique in its combination of sensorless
motor drive and full-wave drive. The TDA5142T offers
protected outputs capable of driving external power FETs
or bipolar power transistors. It can easily be adapted for
different motors and applications. The TDA5142T 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.
• Six output drivers.
• Maximum output current 0.25 A.
• Outputs protected by current limiting and thermal
protection.
• Low current consumption.
• Accurate frequency generator (FG) by using the
motor EMF.
• Brake function.
• Uncommitted operational transconductance amplifier
(OTA), with a high output current, for use as a control
amplifier or as a level shifter in a Switched Mode Power
Supply (SMPS) drive.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
V_P
V_I
V_VMOT
V_O
V_I
T_stg
T_amb
P_tot
V_es
PARAMETER
CONDITIONS
supply voltage
input voltage; all pins except
VMOT
V_I < 18 V
VMOT input voltage
output voltage
FG
AMP OUT
OUT-NA, OUT-NB and OUT-NC
OUT-PA, OUT-PB and OUT-PC
input voltage CAP-ST, CAP-TI,
CAP-CD and CAP-DC
storage temperature
operating ambient temperature
total power dissipation
see Fig.3
electrostatic handling
see Chapter “Handling”
MIN.
4
−0.3
3
GND
−
−
0.2
−
−55
0
−
−
MAX.
18
V_P + 0.5
18
UNIT
V
V
V
V_P
V
18
V
V_VMOT − 0.9 V
−
V
2.5
V
+150
°C
+70
°C
−
W
500
V
June 1994
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