ST EVAL6472H User Manual

Fully integrated stepper motor driver based on the L6472

EVAL6472H

Features

■ Voltage range from 8 V to 45 V

■ Phase current up to 3 A

SPI with daisy chain feature

■

■ SW input

■ FLAG and BUSY LED indicators

■ Adjustable supply voltage compensation

■ Suitable for use in combination with STEVAL-

PCC009V2

Description

r.m.s.

EVAL6472H

Data brief

The EVAL6472H 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 L6472 device. In particular, the board can be used to regulate the L6472 parameters in order to fit application requirements.

The EVAL6472H supports the daisy chain configuration making it suitable for the evaluation of the L6472 in the multi-motor applications.

March 2012 Doc ID 022980 Rev 1 1/11

For further information contact your local STMicroelectronics sales office.

www.st.com

Board description EVAL6472H

Phase A connector

Power supply connector

(8 V - 45 V )

Master SPI connector

BUSY LED

(Amber)

FLAG LED

(Red)

Motor supply voltage

compensation

partitioning regulation

(ADCIN input)

External switch connector

(SW input)

JP1: VDD supply from master SPI connector

JP2: VDD to VREG connection

OSCIN/OSCOUT connector

JP3: Daisy chain termination

Phase B connector

Slave SPI connector

Application reference

area

AM10289V1

1 Board description

Table 1. EVAL6472H specifications

Parameter Value

Supply voltage (VS) 8 to 45 V

Maximum output current (each phase) 3 A

Logic supply voltage (VREG)

Externally supplied: 3.3 V

Internally supplied: 3 V typical

r.m.s.

Logic interface voltage (VDD)

Externally supplied: 3.3 V or 5 V

Internally supplied: VREG

Low level logic input voltage 0 V

High level logic input voltage VDD

Operating temperature -25 to +125 °C

L6472H thermal resistance junction-to-ambient 21 °C/W typical

1. All logic inputs are 5 V tolerant.

Figure 1. Jumpers and connectors location

(1)

2/11 Doc ID 022980 Rev 1

EVAL6472H Board description

Table 2. Jumpers and connectors description

Name Type Function

M1 Power supply Motor supply voltage

M2 Power output Bridge A outputs

M3 Power output Bridge B outputs

CN1 SPI connector Master SPI

CN2 SPI connector Slave SPI

CN3 NM connector OSCIN and OSCOUT pins

CN4 NM connector External switch input

TP1 (VS) Test point Motor supply voltage test point

TP2 (VDD) Test point Logic interface supply voltage test point

TP3 (VREG) Test point

TP5 (GND) Test point Ground test point

TP6 (GND) Test point Ground test point

Logic supply voltage/L6470 internal regulator test point

TP8 (STCK) Test point Step clock input test point

TP9 (STBY/RES) Test point Standby/reset input test point

TP10 (FLAG) Test point FLAG output test point

TP11

(BUSY/SYNC)

Test point BUSY/SYNC output test point

Table 3. Master SPI connector pinout (J10)

number

1 Open drain output L6472 BUSY output

2 Open drain output L6472 FLAG output

3 Ground Ground

4 Supply EXT_VDD (can be used as external logic power supply)

5 Digital output

6 Digital input SPI serial clock signal (connected to L6472 CK input)

7 Digital input

8 Digital input SPI slave select signal (connected to L6472 CS input)

Type Description

SPI master IN slave OUT signal (connected to L6472 SDO output through daisy chain termination jumper JP2)

SPI master OUT slave IN signal (connected to L6472 SDI input)

9 Digital input L6472 step-clock input

10 Digital input L6472 standby/reset input

Doc ID 022980 Rev 1 3/11