TMC603 DATA SHEET (V. 1.06 / 26. Mar. 2009)
3
2 Table of contents
1
2
3
4
FEATURES.......................................................................................................................................... 1
TABLE OF CONTENTS........................................................................................................................ 3
SYSTEM ARCHITECTURE USING THE TMC603................................................................................... 5
PINOUT............................................................................................................................................. 6
4.1
4.2
PACKAGE CODES ............................................................................................................................. 6
PACKAGE DIMENSIONS QFN52........................................................................................................... 7
5
TMC603 FUNCTIONAL BLOCKS.......................................................................................................... 8
5.1
5.2
5.2.1
BLOCK DIAGRAM AND PIN DESCRIPTION................................................................................................ 8
MOSFET DRIVER STAGE ................................................................................................................ 10
Principle of operation....................................................................................................... 10
Break-before-make logic................................................................................................... 11
PWM control via microcontroller...................................................................................... 12
Slope control.................................................................................................................... 13
Reverse capacity (QGD) protection.................................................................................... 14
Considerations for QGD protection................................................................................... 15
Effects of the MOSFET bulk diode..................................................................................... 16
Adding Schottky diodes across the MOSFET bulk diodes................................................. 16
Short to GND detection .................................................................................................... 17
5.2.2
5.2.3
5.2.4
5.2.5
5.2.6
5.2.7
5.2.8
5.2.9
5.2.10
5.3
5.3.1
Error logic......................................................................................................................... 17
CURRENT MEASUREMENT AMPLIFIERS.................................................................................................. 19
Current measurement timing............................................................................................ 19
Auto zero cycle................................................................................................................. 20
Measurement depending on chopper cycle...................................................................... 20
Compensating for offset voltages .................................................................................... 20
Getting a precise current value ........................................................................................ 20
HALLFX SENSORLESS COMMUTATION .................................................................................................. 21
Adjusting the hallFX spike suppression time ................................................................... 21
Adjusting the hallFX filter frequency................................................................................ 22
Block commutation chopper scheme for hallFX............................................................... 22
Start-up sequence for the motor with forced commutation ............................................ 23
POWER SUPPLY............................................................................................................................. 25
Switching regulator and charge pump............................................................................. 25
Charge pump.................................................................................................................... 27
Supply voltage filtering.................................................................................................... 27
Reverse polarity protection............................................................................................... 27
Standby with zero power consumption........................................................................... 27
Low voltage operation down to 9V................................................................................. 28
TEST OUTPUT................................................................................................................................ 29
5.3.2
5.3.3
5.3.4
5.3.5
5.4
5.4.1
5.4.2
5.4.3
5.4.4
5.5
5.5.1
5.5.2
5.5.3
5.5.4
5.5.5
5.5.6
5.6
6
7
ABSOLUTE MAXIMUM RATINGS ..................................................................................................... 30
ELECTRICAL CHARACTERISTICS...................................................................................................... 30
7.1
7.2
OPERATIONAL RANGE..................................................................................................................... 30
DC CHARACTERISTICS AND TIMING CHARACTERISTICS ........................................................................... 31
8
DESIGNING THE APPLICATION ...................................................................................................... 38
8.1
8.1.1
8.2
8.3
CHOOSING THE BEST FITTING POWER MOSFET.................................................................................... 38
Calculating the MOSFET power dissipation...................................................................... 38
MOSFET EXAMPLES....................................................................................................................... 40
DRIVING A DC MOTOR WITH THE TMC603......................................................................................... 40
9
TABLE OF FIGURES ......................................................................................................................... 41
Copyright © 2008 TRINAMIC Motion Control GmbH & Co. KG
TRINAMIC [ TRINAMIC MOTION CONTROL GMBH & CO. KG. ]
