TDA5241 Datasheet, PDF (2/19 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5241
FEATURES
.Full-wave commutation (using push/pull drivers at the output stages) without position sensors
.Built-in start-up circuit
.Optimum commutation independent on motor type or motor loading
.Built-in flyback diodes
.Three push-pull outputs:
-0.85 A output current
-built-in current limiter
.Thermal protection
.Low current consumption by adaptative base-drive
.Tacho output without extra sensor.
..Comparator
for external position generator (PG) signal
.Built-in multiplexer combining internal FG and external PG signal on one pin for easy use with a controlling
microprocessor
.Linear control of the output stages
.PG signal output.
APPLICATIONS
.General purpose spindle driver ( e.g. VCR scanner motor).
GENERAL DESCRIPTION
The TDA5241 is a bipolar integrated circuit used to drive brush less DC motors in full-wave mode. The device senses the
rotor position using an EMF-sensing technique and is ideally suited as a drive circuit for VCR scanner motors.
QUICK REFERENCE DATA
~ Measured over full voltage and temperature ranges
SYMBOL
Yp
IUM
Yo
PARAMETER
supply voltage range (note 1}
I cu!rent
limiting
I oU~Ut voltage
at 10 = 100 mA(Upper+Lower
transistor)
MIN.
4
0.6
TYP.
MAX.
0.85
~
0.93
~
Note
1. An unstabilized
supply can be used; Transients of 2 V allowed with max slope 0.1 V/J.ls.
UNIT
v
A
V
2/19