A4989. Demo Board Schematic/Layout. CONFIGURATION INFORMATION for the EDC023 demonstration circuit board
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1 CONFIGURATION INFORMATION for the EDC023 demonstration circuit board Thank you for choosing to evaluate this product. The following notes will help you to identify which version of the printed circuit board assembly you have received. All revisions of the EDC023 printed board can be configured to support the A3986 and 4989 ICs or the A3985 IC. The primary source of identification of the type of board you have received is the label attached to the outside of the antistatic bag the demonstration board was delivered. Labels with the marking APEK3986SLD and APEK4989SLD confirm the printed board assembly is configured both for the A3986 and A4989. These two products may be fitted into the IC socket on the board without requiring any modification. Printed circuit board designs from EDC023R2 onwards include both A3986 and A4989 in the component legend. Revisions EDC023R0 and EDC023R1 only list A3986 in the legend. A secondary source of identification is the absence of the BNC connector, X4, on the printed board assembly. Labels with the marking APEK3985SLD confirm the printed circuit assembly is configured for the A3985 IC only. This version cannot be used with either A3986 or A4989 ICs without modification. The secondary source of confirmation is the presence of the BNC connector, X4 on the board. If you need more assistance or advice on how to modify this demonstration board, contact your regional Allegro field applications engineer, found at com/design-center/technical-assistance.aspx. A4989-DB
2 SCHEMATIC 2
3 LAYOUT 3
4 LAYOUT 4
5 BILL OF MATERIALS A3986/A4989 Demo Board Rev2 Component List All components to be RoHS compliant Part Value Description Package RS Part Part Value Description Package RS Part C1A 100n Chip capacitor, ceramic, 20V SMT R8 33 Chip Resistor SMT C1B 100n Chip capacitor, ceramic, 20V SMT R W Chip Resistor SMT C2A 100n Chip capacitor, ceramic, 20V SMT R W Chip Resistor SMT C2B 100n Chip capacitor, ceramic, 20V SMT R W Chip Resistor SMT C3 100n Chip capacitor, ceramic, 50V SMT R W Chip Resistor SMT C4 100n Chip capacitor, ceramic, 50V SMT R13 2k2 Chip Resistor SMT C5 100n Chip capacitor, ceramic, 50V SMT R15 1k Chip Resistor SMT C6 100n Chip capacitor, ceramic, 10V SMT R16 10k Chip Resistor SMT C7 10u Alu, El'ytic, 35V 105C 5 / 2mm R17 10k Chip Resistor SMT C8 10u Alu, El'ytic, 16V 105C 4 / 1.5mm R18 10k Chip Resistor SMT C9 Not Fitted R19 10k Chip Resistor SMT C10 Not Fitted R20 10k Chip Resistor SMT C11 100n Chip capacitor, ceramic, 10V SMT R21 10k Chip Resistor SMT C13 100u Alu, Low R, El'ytic, 63V, 105C 10 / 5mm R22 10k Chip Resistor SMT C14 100u Alu, Low R, El'ytic, 63V, 105C 10 / 5mm R23 10k Chip Resistor SMT C15 100n Chip capacitor, ceramic, 10V SMT R24 10k Chip Resistor SMT D1 BZG03C27 27V 3W Zener Diode SMA (DO214) R Resistor, 1 watt SMT Gx \ Test Point, Black (x6 per pcb) 1.32mm Hole R26 0R Chip Resistor (shorting) SMT IC1 A3986/A4989 Dual H/Stepper FET Driver TSSOP38 Socket \ R27 0R Chip Resistor (shorting) SMT (Wells CTI part no. 656J ) R28 Not Fitted IC2 MC78M05ABDT Linear 5V regulator D-PAK R29 Not Fitted J1 \ Jumper Header, 2-way, 7mm H 2.54mm R30 10k Chip Resistor SMT J2 \ Jumper Header, 2-way, 7mm H 2.54mm R31 22k Chip Resistor SMT J3 \ Jumper Header, 2-way, 7mm H 2.54mm R51 470k Chip Resistor SMT J4 \ Jumper Header, 2-way, 7mm H 2.54mm R52 470k Chip Resistor SMT J5 \ Jumper Header, 2-way, 7mm H 2.54mm R53 470k Chip Resistor SMT J6 \ Jumper Header, 2-way, 7mm H 2.54mm R54 470k Chip Resistor SMT J7 Not Fitted R55 470k Chip Resistor SMT M1 IRFR024NPBF Power MOSFET D-PAK R56 470k Chip Resistor SMT M2 IRFR024NPBF Power MOSFET D-PAK R57 470k Chip Resistor SMT M3 IRFR024NPBF Power MOSFET D-PAK R58 470k Chip Resistor SMT M4 IRFR024NPBF Power MOSFET D-PAK S1 \ DIP Switch, 8-pole DIL M5 IRFR024NPBF Power MOSFET D-PAK S2 \ DIP Switch, 2-pole DIL M6 IRFR024NPBF Power MOSFET D-PAK S3 \ Switch, Tactile Push 6mm M7 IRFR024NPBF Power MOSFET D-PAK TPx \ Test Point, Red (x19 per pcb) 1.32mm Hole M8 IRFR024NPBF Power MOSFET D-PAK VR14 20k Multiturn Cermet Trim Resistor 6mm PL1 \ IDC Connector, 20way, 3M \ X1 \ 2way Screw Terminal, 300mils 7.62mm R1 33 Chip Resistor SMT X2 \ 2way Screw Terminal, 300mils 7.62mm R2 33 Chip Resistor SMT X3 \ 2way Screw Terminal, 300mils 7.62mm R3 33 Chip Resistor SMT X4 Not Fitted R4 33 Chip Resistor SMT X5 \ 2way Screw Terminal, 200mils 5.08mm R5 33 Chip Resistor SMT X6 \ 2way Screw Terminal, 200mils 5.08mm R6 33 Chip Resistor SMT \ \ Jumper Shorting Link (Red)* \ R7 33 Chip Resistor SMT \ \ Rubber Feet** 8mm dia BOARD BUILD NOTES:- (1) *Jumper shorting link = Fit x5 per board (all except J3). (2) **Rubber Feet = Fit x5 per board, 1 in each corner (as near as possible) & 1 in centre near socket. (3) Final 'active' stage = board wash (no flux present on finished boards). (4) No manufacturer stick-on label's on topside of pcb, bottom side only. (5) PCB to be a smooth routed finish with no breakout 'lugs' remaining. 5
6 Revision History Number Date Description August 22, 2016 Initial release Copyright 2016, reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the information being relied upon is current. Allegro s products are not to be used in any devices or systems, including but not limited to life support devices or systems, in which a failure of Allegro s product can reasonably be expected to cause bodily harm. The information included herein is believed to be accurate and reliable. However, assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: 6
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