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this is preliminary information on a new product now in development or undergoing evaluation. details are subject to change without notice. for further information contact your local stmicroelectronics sales office. may 2012 doc id 022606 rev 2 1/12 12 EVAL6470PD fully integrated stepper motor driver mounting the l6470 in a high power powerso package data brief ? preliminary data features voltage range from 8 v to 45 v phase current up to 3 ar.m.s. dual spi connector (daisy-chain configuration suitable) sw input flag and busy led indicators adjustable supply voltage compensation high thermal performance (r thj-a 12 c/w typical) suitable for use in combination with the steval-pcc009v2 description the EVAL6470PD demonstration board is a fully integrated microstepping motor driver. in combination with the steval-pcc009v2 communication board and dspin evaluation software, the board allows the engineer 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 4-layer layout and the powerso package allow the top thermal performance to be obtained. the EVAL6470PD supports the daisy-chain configuration making it suitable for the evaluation of the l6470 in multi- motor applications. am11 3 29v1 www.st.com
board description EVAL6470PD 2/12 doc id 022606 rev 2 1 board description figure 1. jumper and connector location table 1. EVAL6470PD 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 typical logic interface voltage (vdd) externally supplied: 3.3 v or 5 v internally supplied: vreg low level logic input voltage 0v high level logic input voltage vdd (1) 1. all logic inputs are 5 v tolerant. operating temperature -25 to +125 c l6470pd thermal resistance junction-to-ambient 12 c/w typical am11 33 0v1
EVAL6470PD board description doc id 022606 rev 2 3/12 table 2. jumper and connector 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 logic supply voltage/l6470 internal regulator test point tp5 (gnd) test point ground test point tp6 (gnd) test point ground 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) pin number type description 1 open drain output l6470 busy/sync output 2 open drain output l6470 flag output 3 ground ground 4 supply ext_vdd (can be used as external logic power supply) 5 digital output spi master in slave out signal (connected to the l6470 sdo output through the daisy-chain termination jumper jp2) 6 digital input spi serial clock signal (connected to l6470 ck input) 7 digital input spi master out slave in signal (connected to l6470 sdi input) 8 digital input spi slave select signal (connected to l6470 cs input) 9 digital input l6470 step-clock input 10 digital input l6470 stby/rst input
board description EVAL6470PD 4/12 doc id 022606 rev 2 table 4. slave spi connector pinout (j11) pin number type description 1 open drain output l6470 busy/sync output 2 open drain output l6470 flag output 3 ground ground 4 supply ext_vdd (can be used as external logic power supply) 5 digital output spi master in slave out signal (connected to pin 5 of j10) 6 digital input spi serial clock signal (connected to l6470 ck input) 7 digital input spi master out slave in signal (connected to l6470 sdo output) 8 digital input spi slave select signal (connected to l6470 cs input) 9 digital input l6470 step-clock input 10 digital input l6470 stby/rst input
EVAL6470PD board description doc id 022606 rev 2 5/12 figure 2. EVAL6470PD - schematic 1a 2a s w 1b 2b o s cin o s cout applic a tion reference v s gnd g e r v d d v s pi_in s pi_out y s u b g a l f option y b t s k c t s v s gnd gnd s w mi s o s di ck nc s flag bu s y s tck s tby_re s et mi s o s do ck nc s flag bu s y s do mi s o bu s y s di ck nc s s w s tck adcin s do flag bu s y flag s tby_re s et s tck s tby_re s et v s v s ext_vdd ext_vdd ext_vdd vdd vreg vreg vdd vreg vdd vdd vdd vdd v s v s tp1 1 c15 100nf/50v cn 3 n.m. 1 2 cn1 1 2 3 4 5 6 7 8 9 10 c9 100pf/6. 3 v r4 3 9k m2 1 2 c 3 10nf/50v + c1 100 u f/6 3 v jp 3 u1 l6470 vdd 24 vreg 9 o s cin 10 o s cout 11 cp 1 3 vboot 14 adcin 8 v s a 4 v s a 5 v s b 15 v s b 16 pgnd 1 out1a 2 out2a 3 5 out1b 17 out2b 20 agnd 12 s w 7 dgnd 2 8 bu s y_ s ync 29 flag 3 1 s do 25 s di 27 ck 26 c s 3 0 s tby_re s 6 s tck 3 2 out1a 3 out1b 1 8 out2b 21 out2a 3 6 v s b 22 v s b 2 3 v s a 33 v s a 3 4 pgnd 19 e_pad 3 7 tp6 1 c1 3 10nf/6. 3 v tp11 1 tp10 1 c11 1nf/6. 3 v r6 470 c 8 220nf/16v r 8 10k c2 100nf/50v c6 100nf/6. 3 v tp2 1 cn4 n.m. 1 2 dl1 2 1 tr1 200k 1 3 2 c16 100nf/50v dl2 2 1 m 3 1 2 r 3 3 9k r1 3 1k6 c12 3 . 3 nf/6. 3 v tp9 1 tp 3 1 d2 bzx5 8 5-b 3 v6 + c1a 100 u f/6 3 v r5 3 9k c5 47 u f/6. 3 v cn2 1 2 3 4 5 6 7 8 9 10 r7 470 tp5 1 m1 1 2 c4 100nf/6. 3 v tp 8 1 jp2 c10 100pf/6. 3 v d1 bav99 1 2 3 c14 100nf/50v r2 8 k2 c7 10 u f/6. 3 v jp1 am12921v1
board description EVAL6470PD 6/12 doc id 022606 rev 2 table 5. EVAL6470PD - bill of material index quantity reference value package 1 1 cn1 pol. idc male header vertical 10 poles (black) con-flat-5x2-180m 2 1 cn2 pol. idc male header vertical 10 poles (gray) con-flat-5x2-180m 3 2 cn3,cn4 n.m. strip254p-m-2 4 1 c1a 100 f/63 v (option) cape-r10hxx-p5 5 1 c1 100 f/63 v capes-r10hxx 6 4 c2,c14,c15,c1 100 nf/50 v capc-0603 7 1 c3 10 nf/50 v capc-0603 8 2 c4,c6 100 nf/6.3 v capc-0603 9 1 c5 47 f/6.3 v capc-1206 10 1 c7 10 f/6.3 v capc-0805 11 1 c8 220 nf/16 v capc-0603 12 2 c9,c10 100 pf/6.3 v capc-0603 13 1 c11 1 nf/6.3 v capc-0603 14 1 c12 3.3 nf/6.3 v capc-0603 15 1 c13 10 nf/6.3 v capc-0603 16 1 dl1 led red ledc-0805 17 1 dl2 led amber ledc-0805 18 1 d1 bav99 sot23 19 1 d2 bzx585-b3v6 sod523 20 1 jp1 jumper open jp2so 21 2 jp2,jp3 jumper closed jp2so 22 3 m1,m2,m3 screw connector 2 poles morsv-508-2p 23 1 r1 31.6 k ? resc-0603 24 1 r2 8.2 k ? resc-0603 25 3 r3 r4 r5 39 k ? resc-0603 26 2 r6,r7 470 k ? resc-0603 27 1 r8 10 k ? resc-0603 28 9 tp1, tp2, tp3, tp5, tp6, tp8, tp9, tp10, tp11 tpth-ring-1mm tpth-ring-1mm 29 1 tr1 200 k ? trimm-100x50x110-64w 30 1 u1 l6470 powerso36
EVAL6470PD board description doc id 022606 rev 2 7/12 figure 3. EVAL6470PD - layout (silk screen) figure 4. EVAL6470PD - layout (top layer) am12922v1 am1292 3 v1
board description EVAL6470PD 8/12 doc id 022606 rev 2 figure 5. EVAL6470PD - layout (inner layer 2) figure 6. EVAL6470PD - layout (inner layer 3) am12924v1 am12925v1
EVAL6470PD board description doc id 022606 rev 2 9/12 figure 7. EVAL6470PD - layout (bottom layer am12926v1
board description EVAL6470PD 10/12 doc id 022606 rev 2 1.1 thermal data figure 8. thermal impedance graph 0 2 4 6 8 10 1 10 100 1000 10000 time ( s econd s ) zth zth (c/w) 12 am11 33 7v1
EVAL6470PD revision history doc id 022606 rev 2 11/12 2 revision history table 6. document revision history date revision changes 23-dec-2011 1 initial release. 31-may-2012 2 updated: figure 2 , figure 3 , figure 4 , figure 5 , figure 6 , figure 7 . updated tp9 (stby/res) function in ta bl e 2 ; updated pin 1and pin 10 description both in ta bl e 3 and in ta bl e 4 . updated table 5: EVAL6470PD - bill of material .
EVAL6470PD 12/12 doc id 022606 rev 2 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 he rein at any time, without notice. all st products are sold pursuant to st?s terms and conditions of sale. purchasers are solely responsible for the choice, selection and use of the st products and services described herein, and st as sumes no liability whatsoever relating to the choice, selection or use of the st products and services described herein. no license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted under this document. i f any part of this document refers to any third party products or services it shall not be deemed a license grant by st for the use of such third party products or services, or any intellectual property contained therein or considered as a warranty covering the use in any manner whatsoev er of such third party products or services or any intellectual property contained therein. unless otherwise set forth in st?s terms and conditions of sale st disclaims any express or implied warranty with respect to the use and/or sale of st products including without limitation implied warranties of merchantability, fitness for a particular purpose (and their equivalents under the laws of any jurisdiction), or infringement of any patent, copyright or other intellectual property right. unless expressly approved in writing by two authorized st representatives, st products are not recommended, authorized or warranted for use in military, air craft, space, life saving, or life sustaining applications, nor in products or systems where failure or malfunction may result in personal injury, death, or severe property or environmental damage. st products which are not specified as "automotive grade" may only be used in automotive applications at user?s own risk. resale of st products with provisions different from the statements and/or technical features set forth in this document shall immediately void any warranty granted by st for the st product or service described herein and shall not create or extend in any manner whatsoev er, any liability of st. st and the st logo are trademarks or register ed trademarks of st in various countries. information in this document supersedes and replaces all information previously supplied. the st logo is a registered trademark of stmicroelectronics. all other names are the property of their respective owners. ? 2012 stmicroelectronics - all rights reserved stmicroelectronics group of companies australia - belgium - brazil - canada - china - czech republic - finland - france - germany - hong kong - india - israel - ital y - japan - malaysia - malta - morocco - philippines - singapore - spain - sweden - switzerland - united kingdom - united states of america www.st.com

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