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March 2015 DocID022736 Rev 3 1/11

EVAL6470H

Fully integrated stepper motor driver mounting the L6470

Data brief

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 SPIN 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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Board description EVAL6470H

2/11 DocID022736 Rev 3

Board description

Figure 1. Jumpers and connectors location

Table 1. EVAL6470H specifications

Parameter Value

Supply voltage (VS) 8 to 45 V

Maximum output current (each phase) 3 A

r.m.s.

Logic supply voltage (VREG)

Externally supplied: 3.3 V, internally supplied: 3 V

(typ.)

Logic interface voltage (VDD)

Externally supplied: 3.3 V or 5 V, internally supplied:

VREG

Low level logic inputs voltage 0 V

High level logic input voltage VDD

(1)

1. All logic inputs are 5 V tolerant.

Operating temperature -25 to +125 °C

L6470H thermal resistance junction to ambient 21 °C/W (typ.)

Phase A connector

Power supply connector

(8 V - 45 V)

Master SPI

connector

BUSY LED

(Amber)

FLAG LED

(Red)

Motor supply voltege

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

AM11330v1