for further information contact your local stmicroelectronics sales office. june 2013 docid023044 rev 2 1/11 EVAL6208Q stepper motor driver mounting the l6208q data brief features ? voltage range from 8 to 52 v ? phase current up to 2.5 a r.m.s. ? adjustable pwm current control off-time ? logic inputs 5 v / 3.3 v compliant ? small application footprint with high thermal performance ? suitable for use in combination with practispin? 2 software description the EVAL6208Q device is a stepper motor driver board allowing the user to test the l6208q functions. the board can be driven using the steval-pcc009v2 demonstration board and the practispin 2 evaluation software. am11912v1 www.st.com
contents EVAL6208Q 2/11 docid023044 rev 2 contents 1 board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 3 bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 4 layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 5 revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
docid023044 rev 2 3/11 EVAL6208Q board description 11 1 board description figure 1. trimmer and connector locations table 1. electrical specifications parameter value supply voltage (vs) 8 to 52 v maximum output current (each phase) 2.5 a r.m.s. low level logic input voltage 0 v high level logic input voltage 5 v / 3.3 v (1) 1. logic inputs are 3.3 v and 5 v compliant. maximum vref a /vref b input voltage (j2 connector) 3.3 v (2) 2. equivalent to about 3.1 a peak current. switching frequency up to 100 khz operating temperature - 25 to +125 c l6208q thermal resistance junction-to-ambient 17 c/w phase a t off regulation phase a connector phase b connector phase b t off regulation power supply connector (8 v - 52 v) application reference area control board connector am12707v1
board description EVAL6208Q 4/11 docid023044 rev 2 table 2. control board connector pinout (j2) pin type function 2 ground ground 3 logic input active low reset of l6208q 4 logic input direction input (cw/ccw input of l6208q) 5 logic input decay mode selection input (control input of l6208q) 6 logic input step clock input (clock input of l6208q) 11 analog input reference voltage for phase a current control 12 analog input reference voltage for phase b current control 13 ground ground 14 supply voltage 3.3 v supply voltage 16 logic input device enable input (en input of l6208q) 23 ground ground 24 analog output board identification system id0 25 analog output board identification system id1 28 ground ground 29 logic output fault output (en output of l6208q) 30 logic input step mode selection input (half/full input of l6208q) others unconnected
docid023044 rev 2 5/11 EVAL6208Q schematic 11 2 schematic figure 2. schematic $ s s o l f d w l r q u h i h u h q f h 9 9 9 6 * 1 ' 2 8 7 $ 2 8 7 $ 2 8 7 % 2 8 7 % 9 6 * 1 ' * 1 ' 3 7 + 2 3 7 , 2 1 5 ( 6 ( 7 & |