TDA5145TS Datasheet, PDF (2/20 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5145TS
FEATURES
• Full-wave commutation (using push-pull drivers at the
output stages) without position sensors
• Built-in start-up circuitry
• Three push-pull outputs:
– Output current 2.0 A (typ.)
– Built-in current limiter
– Soft-switching outputs for low Electromagnetic
Interference (EMI).
• Thermal protection
• Flyback diodes
• Motor brake facility
• Direction control input
• Reset function.
APPLICATIONS
• General purpose spindle driver e.g.:
– Hard disk drive
– Tape drive
– Optical disk drive.
GENERAL DESCRIPTION
The TDA5145TS is a bipolar integrated circuit used to
drive 3-phase brushless DC motors in full-wave mode.
The device is sensorless (saving of 3 hall-sensors) using
the back EMF sensing technique to sense the rotor
position. It includes bidirectional control, brake function
and has a special circuit built-in to reduce the EMI
(soft-switching output stages).
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
SYMBOL
PARAMETER
CONDITIONS
V_P
V_i(VMOT)
V_DO
I_LIM
supply voltage
input voltage to the output driver
stages
drop-out output voltage
current limiting
note 1
note 2
I_o = 100 mA
V_VMOT = 10 V; R_o = 1.2 Ω
Notes
1. An unstabilized supply can be used.
2. V_VMOT = V_P; all outputs I_o = 0 mA.
MIN.
4
1.7
−
1.8
TYP.
−
−
0.90
2.0
MAX.
18
16
1.05
2.5
UNIT
V
V
V
A
ORDERING INFORMATION
TYPE
NUMBER
TDA5145TS
NAME
SSOP24
PACKAGE
DESCRIPTION
plastic shrink small outline package; 24 leads;
body width 5.3 mm
VERSION
SOT340-1
1998 Oct 27
2