TDA5240T Datasheet, PDF (2/19 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5240T
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
.Soft slope outputs for low radiation.
.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 TDA5240T is a bipolar integrated circuit used to drive brushless 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
Vp
IUM
Vo
PARAMETER
supply voltage range (note 1)
current limiting
output voltage at 10 = 100 mA(Upper
+ Lower transistor)
MIN.
4
0.6
TYPo
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.
MAX.
UNIT
18
1
1.05
~
8
November
96
2/19