Rainbow-electronics ATA6830 Manuel d'utilisateur

1Features• 2-Phase 1 A Stepping Motor Driver• Compensated Half Step Operation• Chopper Current Control• Unidirectional Single Wire Bus Interface with

10ATA6830 4575B–BCD–01/03Figure 10. Flow Diagram for the Power-up Sequence reset statesynchronizationNYidle state3 successivereference runcommandsNY

11ATA68304575B–BCD–01/03Reference Run In normal operation, new position commands are transmitted as absolute values. Todrive the stepping motor to the

12ATA6830 4575B–BCD–01/03Figure 11. Cruise Control In addition to the actual step frequency there is a maximum step frequency up to whichthe actual

13ATA68304575B–BCD–01/03If the chip temperature exceeds the overtemperature warning threshold, the step speedis reduced to 300 Hz. If the chip tempera

14ATA6830 4575B–BCD–01/03Figure 13. Chopper Current Control Figure 14. Current Flow in Halfbridge Exception Handling During operation, different ex

15ATA68304575B–BCD–01/03Travel operation is suspended when overtemperature is detected. An error signal is sentto the bus master via the bus. Operatio

16ATA6830 4575B–BCD–01/03Thermal ResistanceParameters Symbol Value UnitThermal resistance junction-case RthJC5K/WThermal resistance junction-ambient

17ATA68304575B–BCD–01/035.2Output current Output stage off 3, 5, 17, 20ILEAK10 µA A5.3Output current Hold mode 3, 5, 17, 20VSHUNT1840 55 200 mA B5.4Ou

18ATA6830 4575B–BCD–01/036.13 Threshold voltage 11.0 V comparator, rising edge1, 7, 15, 21V11_UP10.8 11.1 11.4 V A6.14 Threshold voltage 11.0 V compa

19ATA68304575B–BCD–01/037.2Delay time 2 following commands22 TD5msC, D7.3Pause time Between high and low byte22 TP0µsC, D7.4 Clamping time Bus error c

2ATA6830 4575B–BCD–01/03Figure 1. Block Diagram Pin ConfigurationFigure 2. Pinning HP-VFQFP-N28 SRBSM1BVBAT1BSM2BVBAT2BSRASM1AVBAT1ASM2AVBAT2ADrive

20ATA6830 4575B–BCD–01/03Figure 16. Application Circuit MLP 7x7mm0.8mm pitch28 lead8 9 10 11 12 13 1428 27 26 25 24 23 22212019181716151234567SMR1C2

21ATA68304575B–BCD–01/03Table 5. Bill of Material Reference Component ValueC1 Oscillator capacitor 100 pF, 5%C2 Bus input capacitor 1 nFC3 Ceramic ca

22ATA6830 4575B–BCD–01/03Package InformationThe package is a thermal power package MLF 7 ´ 7 with a soldered leadframe and 28 pins. The overall size

Printed on recycled paper.© Atmel Corporation 2003.Atmel Corporation makes no warranty for the use of its products, other than those expressly contai

3ATA68304575B–BCD–01/03Pin DescriptionPin Symbol Function1 VBAT1A Battery voltage2 n.c. Not connected3 SM1A Connection for stepping motor winding A4 S

4ATA6830 4575B–BCD–01/03Functional DescriptionAnalog Blocks Figure 3. Analog Blocks The circuit contains an integrated 5 V regulator to supply the i

5ATA68304575B–BCD–01/03Digital BlocksFigure 4. Digital Blocks Figure 4 shows all digital blocks of the circuit. The stepping motor will be controlled

6ATA6830 4575B–BCD–01/03Stepping Motor DriverFigure 5. Stepping Motor Driver Figure 5 shows the diagram of one H-bridge driver stage. It consists of

7ATA68304575B–BCD–01/03Figure 6. Synchronization Sequence Between two commands a pause has to be included. This is necessary for a clear rec-ogition

8ATA6830 4575B–BCD–01/03Bus Commands There are different commands for controlling the stepping motor. Table 1 shows a list ofall implemented commands

9ATA68304575B–BCD–01/03Power-up Sequence After power-up the circuit has to be synchronized and a reference run has to be exe-cuted before a position c