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TDA5145TS Datasheet(PDF) 2 Page - NXP Semiconductors

Part No. TDA5145TS
Description  Brushless DC motor drive circuit
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Maker  PHILIPS [NXP Semiconductors]
Homepage  http://www.nxp.com
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 2 page
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1998 Oct 27
2
Philips Semiconductors
Product specification
Brushless DC motor drive circuit
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.
Notes
1. An unstabilized supply can be used.
2. VVMOT =VP; all outputs Io = 0 mA.
ORDERING INFORMATION
SYMBOL
PARAMETER
CONDITIONS
MIN.
TYP.
MAX.
UNIT
VP
supply voltage
note 1
4
18
V
Vi(VMOT)
input voltage to the output driver
stages
note 2
1.7
16
V
VDO
drop-out output voltage
Io = 100 mA
0.90
1.05
V
ILIM
current limiting
VVMOT =10V; Ro = 1.2 Ω
1.8
2.0
2.5
A
TYPE
NUMBER
PACKAGE
NAME
DESCRIPTION
VERSION
TDA5145TS
SSOP24
plastic shrink small outline package; 24 leads;
body width 5.3 mm
SOT340-1




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