Product specification File under Integrated
November
96
Circuits,
ICO1
Philips Semiconductors
re
Philips Semicond...
Product specification File under Integrated
November
96
Circuits,
ICO1
Philips Semiconductors
re
Philips Semiconductors
Product specification
Brushless
DC motor
drive
circuit
TDA5240T
FEATURES .Full-wave .Built-in .Optimum .Built-in .Three -0.85 -built-in .Thermal .Soft .Low .Tacho commutation start-up circuit commutation flyback diodes push-pull outputs: independent on motor type or motor loading (using push/pull drivers at the output stages) without position sensors
A output current current limiter protection
slope outputs for low radiation. current consumption by adaptative base-drive
output without extra sensor. for external position generator (PG) signal PG signal on one pin for easy use with a controlling
.Comparator .Built-in .Linear .PG
multiplexer
combining
internal FG and external
microprocessor control of the output stages 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
MIN. TYPo
18
SYMBOL
Vp IUM Vo
PARAMETER
supply voltage range (note 1)
MAX.
UNIT
4 0.6 0.85 0.93
+ Lower
transistor)
current limiting
output voltage at 10 = 100 mA(Upper
1
1.05
~
Note 1. An unstabilized supply...