TDA5146T Datasheet, PDF (2/18 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5146T
FEATURES
• Full–wave commutation (using push/pull drivers at the output stages) without position sensors
• Built–in start–up circuit
• Three push–pull outputs:
– 2 A output current (Typical)
– Built–in current limiter
• Thermal protection
• Soft switching outputs
• Flyback diodes
• Tacho output sensor
• Brake function
• Direction control input
• Reset function
• FET driver stage to be used in a buck converter
APPLICATIONS
General purpose spindle driver (e.g., HDD, tape driver)
GENERAL DESCRIPTION
The TDA5146T 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 a hard disk drive motor or tape drive.
QUICK REFERENCE DATA
Measured over full voltage and temperature ranges
Symbol
Parameter
V_P
Vsup
Supply voltage range (Note 1)
Supply for the FET driver voltage range
V_VMOT
V_Do
I_LIM
Input voltage to the output driver stages (see Fig. 1)
Driver output voltage drop I_O= 100 mA
Current limiting
NOTES:
1. An unstabilized supply can be used
2. V_VMOT=V_P ; all outputs I_O = 0 mA
Min.
4
4
1.7
–
1.80
Typ.
–
–
–
0.9
2.0
ORDERING AND PACKAGE INFORMATION
Type number
Package
Name
Description
TDA5146T
SO28
plastic small outline package; 28 leads; body width 7.5 mm
Max.
Unit
18
V
18
V
16
V
1.05
V
2.5
A
Version
SOT136-1
1994 May 18
2