TDA5241 Datasheet, PDF (6/19 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips
Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5241
FUNCTIONAL DESCRIPTION
The TDA5241 offers a sensorless three phase motor drive function. It is unique in its combination of sensorless motor
drive and full-wave drive.
The TDA5241 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 TDA5241 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 (0.85 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
.Comparator for external position generator (PG) signal
.Built-in multiplexer combining internal FG and external PG signals on one pin for easy use with a controlling
microprocessor
.Linear control of the output stages.
LIMITING VALUES
In accordance with the Absolute Maximum Rating System (IEC 134).
SYMBOL
PARAMETER
Vp
VI
8¹
0
Vo
VI
Ptot
supply voltage
input voltage; all pins except Vp (VI < 8 V)
output voltage; PGOUT and PG/FG
output voltage; MOTO, MOT1, MOT2 and MOT3
input voltage; CAP-ST, CAP- TI, CAP-CD and CAP-DC
total power dissipation
~
Tamb
storage temperature range
I operating
ambient
temperature
range
MIN.
-0.3
GND
-1
~
1-10
MAX.
I ¹⁸
V p + 0..55
Vp
Vp + Vo
2.5
see power
derating
curve
+150
+70
UNIT
v
v
v
v
v
loc
~
March 1997
6/19