Datasheet

ManualsBrandsTRINAMIC ManualsDrive Engineeringevaluation Board

TMC603 DATA SHEET (V. 1.05 / 11. Mar. 2009) 3

2 Table of contents

1 FEATURES .......................................................................................................................................... 1

2 TABLE OF CONTENTS ........................................................................................................................ 3

3 SYSTEM ARCHITECTURE USING THE TMC603 ................................................................................... 5

4 PINOUT ............................................................................................................................................. 6

4.1 PACKAGE CODES ............................................................................................................................. 6

4.2 PACKAGE DIMENSIONS QFN52 ........................................................................................................... 7

5 TMC603 FUNCTIONAL BLOCKS .......................................................................................................... 8

5.1 BLOCK DIAGRAM AND PIN DESCRIPTION................................................................................................ 8

5.2 MOSFET DRIVER STAGE ................................................................................................................ 10

5.2.1 Principle of operation ....................................................................................................... 10

5.2.2 Break-before-make logic ................................................................................................... 11

5.2.3 PWM control via microcontroller ...................................................................................... 12

5.2.4 Slope control .................................................................................................................... 13

5.2.5 Reverse capacity (QGD) protection .................................................................................... 14

5.2.6 Considerations for QGD protection ................................................................................... 15

5.2.7 Effects of the MOSFET bulk diode ..................................................................................... 16

5.2.8 Adding Schottky diodes across the MOSFET bulk diodes ................................................. 16

5.2.9 Short to GND detection .................................................................................................... 17

5.2.10 Error logic ......................................................................................................................... 17

5.3 CURRENT MEASUREMENT AMPLIFIERS .................................................................................................. 19

5.3.1 Current measurement timing............................................................................................ 19

5.3.2 Auto zero cycle ................................................................................................................. 20

5.3.3 Measurement depending on chopper cycle ...................................................................... 20

5.3.4 Compensating for offset voltages .................................................................................... 20

5.3.5 Getting a precise current value ........................................................................................ 20

5.4 HALLFX SENSORLESS COMMUTATION .................................................................................................. 21

5.4.1 Adjusting the hallFX spike suppression time ................................................................... 21

5.4.2 Adjusting the hallFX filter frequency ................................................................................ 22

5.4.3 Block commutation chopper scheme for hallFX ............................................................... 22

5.4.4 Start-up sequence for the motor with forced commutation ............................................ 23

5.5 POWER SUPPLY ............................................................................................................................. 25

5.5.1 Switching regulator and charge pump............................................................................. 25

5.5.2 Charge pump .................................................................................................................... 27

5.5.3 Supply voltage filtering .................................................................................................... 27

5.5.4 Reverse polarity protection ............................................................................................... 27

5.5.5 Standby with zero power consumption ........................................................................... 27

5.5.6 Low voltage operation down to 9V ................................................................................. 28

5.6 TEST OUTPUT................................................................................................................................ 29

6 ABSOLUTE MAXIMUM RATINGS ..................................................................................................... 30

7 ELECTRICAL CHARACTERISTICS ...................................................................................................... 30

7.1 OPERATIONAL RANGE ..................................................................................................................... 30

7.2 DC CHARACTERISTICS AND TIMING CHARACTERISTICS ........................................................................... 31

8 DESIGNING THE APPLICATION ...................................................................................................... 38

8.1 CHOOSING THE BEST FITTING POWER MOSFET .................................................................................... 38

8.1.1 Calculating the MOSFET power dissipation ...................................................................... 38

8.2 MOSFET EXAMPLES ....................................................................................................................... 40

8.3 DRIVING A DC MOTOR WITH THE TMC603 ......................................................................................... 40

9 TABLE OF FIGURES ......................................................................................................................... 41