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April 2012 Doc ID 022736 Rev 2 1/11

EVAL6470H

Fully integrated stepper motor driver mounting the L6470

Data brief − production data

Features

■ Voltage range from 8 V to 45 V

■ Phase current up to 3 A

rms

■ SPI with daisy-chain feature

■ Socket for external resonator or crystal

■ SW input

■ FLAG and BUSY LED indicators

■ Adjustable supply voltage compensation

■ Suitable to be used in combination with

STEVAL-PCC009V2

Description

The EVAL6470H demonstration board is a fully

integrated microstepping motor driver. In

combination with the STEVAL-PCC009V2

communication board and the dSPIN evaluation

software, the board allows the user to investigate

all the features of the L6470 device. In particular,

the board can be used to check the voltage mode

driving and to regulate the L6470 parameters in

order to fit the application requirements.

The EVAL6470H supports the daisy-chain

configuration making it suitable for the evaluation

of the L6470 in multi-motor applications.

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Summary of content (11 pages)

PAGE 1
EVAL6470H Fully integrated stepper motor driver mounting the L6470 Data brief − production data Features ■ Voltage range from 8 V to 45 V ■ Phase current up to 3 Arms. ■ SPI with daisy-chain feature ■ Socket for external resonator or crystal ■ SW input ■ FLAG and BUSY LED indicators ■ Adjustable supply voltage compensation ■ Suitable to be used in combination with STEVAL-PCC009V2 Description The EVAL6470H demonstration board is a fully integrated microstepping motor driver.
PAGE 2
Board description 1 EVAL6470H Board description Table 1. EVAL6470H specifications Parameter Value Supply voltage (VS) 8 to 45 V Maximum output current (each phase) 3 Ar.m.s. Logic supply voltage (VREG) Externally supplied: 3.3 V, internally supplied: 3 V (typ.) Logic interface voltage (VDD) Externally supplied: 3.
PAGE 3
EVAL6470H Table 2.
PAGE 4
Board description Table 4.
PAGE 5
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PAGE 6
Board description Table 5. EVAL6470H EVAL6470H - bill of material Item Quantity Reference Value 1 1 C1 220 nF/16 V CAPC-0603 2 2 C2,C4 100 nF/6.3 V CAPC-0603 3 1 C3 10 µF/6.3 V CAPC-3216 4 1 C5 47 µF/6.3 V CAPC-3216 5 1 C6 10 nF/50 V CAPC-0603 6 4 C7,C8,C15,C16 100 nF/50 V CAPC-0603 7 1 C9A 100 µF/63 V CAPE-R8H12-P35 8 1 C9 100 µF/63 V CAPES-R10HXX 9 3 C10,C11,C12 100 pF/6.3 V CAPC-0603 10 1 C13 3.3 nF/6.3 V CAPC-0603 11 1 C14 10 nF/6.
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EVAL6470H Board description Figure 3. EVAL6470H - layout (silk screen) !- V Figure 4.
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Board description Figure 5. EVAL6470H EVAL6470H - layout (inner layer 2) !- V Figure 6.
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EVAL6470H Board description Figure 7. EVAL6470H - layout (bottom layer) !- V Thermal data Figure 8. Thermal impedance graph Zth 25 20 Zth(°C/W) 1.
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Revision history 2 EVAL6470H Revision history Table 6. Document revision history Date Revision 25-Jan-2012 1 Initial release. 2 Updated information: Table 2 for connector TP3 (STBY/RES). Table 3, and Table 4 description changed for pin 1and pin10 Table 5 for item15. Updated: Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, and Figure 7.
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EVAL6470H Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.