TDA5142T Datasheet, PDF (2/20 Pages) NXP Semiconductors – Brushless DC motor drive circuit

Philips Semiconductors
Brushless DC motor drive circuit
Product specification
TDA5142T
FEATURES
• Full-wave commutation without position sensors
• Built-in start-up circuitry
• Six outputs that can drive three external transistor pairs:
– output current 0.2 A (typ.)
– low saturation voltage
– built-in current limiter
• Thermal protection
• Tacho output without extra sensor
• Transconductance amplifier for an external
control transistor
• Motor brake facility.
APPLICATIONS
• High-power applications e.g.:
– high-end hard disk drives
– automotive.
GENERAL DESCRIPTION
The TDA5142T 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 a brake function and 6 pre-drivers able to
control FETs or bipolar external transistors. It is ideally
suited for high-power applications such as high-end hard
disk drives, automotive and other applications.
QUICK REFERENCE DATA
Measured over full voltage and temperature range.
SYMBOL
V_P
V_VMOT
V_O
PARAMETER
supply voltage
input voltage to the output
driver stages
driver output voltage
I_LIM
current limiting
CONDITIONS
note 1
I_O = 100 mA; lower transistor
I_O = 100 mA; upper transistor
V_VMOT = 14.5 V; R_O = 47 Ω
Note
1. An unstabilized supply can be used.
MIN.
4
3
−
1.05
150
TYP.
−
−
−
−
200
MAX.
18
18
0.35
−
250
UNIT
V
V
V
V
mA
ORDERING INFORMATION
TYPE NUMBER
TDA5142T
PINS
24
PACKAGE
PIN POSITION
SOL
MATERIAL
plastic
CODE
SOT137-1
June 1994
2