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Part: TDF5242T
Category:
Interface and Interconnect
Description: TDF5242T; Brushless DC Motor Drive Circuit
Company: Philips Semiconductors
Datasheet: Download TDF5242T datasheet File size : 455 kB
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INTEGRATED CIRCUITS
DATA SHEET
TDF5242T Brushless DC motor drive circuit
Preliminary specification Supersedes data of 1997 Apr 23 File under Integrated Circuits, IC11 1997 Sep 12
Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
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 · Brake control input · Direction control input. GENERAL DESCRIPTION APPLICATIONS
TDF5242T
· High-power applications, for instance: high-end hard disk drives automotive applications.
The TDF5242T is a bipolar integrated circuit for driving 3-phase brushless DC motors in full-wave mode. The device functions sensorless, thus saving 3 hall-effect sensors, using the back-EMF (Electro Motive Force) sensing technique to sense the rotor position. It includes 6 pre-drivers able to control external FETs (Field Effect Transistors) or bipolar transistors. It offers brake and direction control. It is ideally suited for high-power applications such as high-end hard disk drives and automotive applications.
QUICK REFERENCE DATA Measured over full voltage and temperature range. SYMBOL VP VVMOT VO ILIM Note 1. An unstabilized supply can be used. ORDERING INFORMATION TYPE NUMBER TDF5242T PACKAGE NUMBER SO28 DESCRIPTION plastic small outline package; 28 leads; body width 7.5 mm VERSION SOT136-1 PARAMETER supply voltage input voltage to the output driver stages driver output voltage current limiting IO = 100 mA; lower transistor IO = 100 mA; upper transistor VVMOT = 14.5 V; RO = 47 note 1 CONDITIONS 4 3 - 1.05 150 MIN. - - - - 200 TYP. MAX. 18 18 0.35 - 250 UNIT V V V V mA
1997 Sep 12
2
Philips Semiconductors
Preliminary specification
Brushless DC motor drive circuit
BLOCK DIAGRAM
handbook, full pagewidth
TDF5242T
AMP OUT 21
VMOT 6 OUTPUT DRIVER STAGE
+AMP IN -AMP IN
19 20
TRANSCONDUCTANCE AMPLIFIER
27 CAP-ST 16 START-UP OSCILLATOR
OUT-NA
CAP-DC CAP-CD
15 14
ADAPTIVE COMMUTATION DELAY
OUTPUT DRIVER STAGE
28
OUT-PA
TEST
8
THERMAL PROTECTION
TIMING
OUTPUT DRIVER STAGE COMMUTATION LOGIC
1
OUT-NB
CAP-TI
18 ROTATION SPEED AND DETECTOR OUTPUT STAGE
OUTPUT DRIVER STAGE
2
OUT-PB
FG
10
OUTPUT DRIVER STAGE
4
OUT-PC
DIRECTION LOGIC BRAKE LOGIC OUTPUT DRIVER STAGE 5 OUT-NC
22
COMP-A
TDF5242T
23 COMP-B
n.c.
12, 17, 25 EMF COMPARATORS 7 DIR 9 BRAKE 11 3 13
24 26
COMP-C MOT0
MGG988
GND2 GND1
VP
Fig.1 Block diagram.
1997 Sep 12
3
Others parts begin by td
TD-1 TD-2 TD-3 TD-4 TD-5 TD-6 TD-7 TD-8 TD-9 TD-10 TD-11 TD-12 TD-13 TD-14 TD-15 TD-16 TD-17 TD-18 TD-19 TD-20 TD-21
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