MPS EV6501AGF-00B User manual

EV6501AGF-00B
2.5A, 35V
Bipolar Stepper Motor Driver
Evaluation Kit
EV6501A Rev.1.0 www.MonolithicPower.com 1
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP6501AGF demo board is a customized
evaluation board for a stepper motor driver with
a built-in micro-stepping translator.
The MP6501AGF demo board operates from a
supply voltage of up to 35V and delivers motor
current up to 2.5A. It operates a bipolar stepper
motor in full-, half-, quarter-, eighth-, and
sixteenth- step modes by setting the MS3, MS2,
and MS1. The input control signals and
reference voltage are applied through the
connector or generated on the board.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage VIN 8-35 V
Output Current IOUT 2.5 A
FEATURES
Wide 8V to 35V Input Voltage Range
Up to 2.5A Programmable Output Current
Full-, Half-, Quarter-, Eighth- and Sixteenth-
Step modes
Adjustable Mixed Decay Ratio or Automatic
Decay
OCP, OVP, and OTP
Control Signals Generated by On-Board
USB Microcontroller or Supplied Externally
APPLICATIONS
Printers
General Bipolar Stepper Drivers
All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive.
For MPS green status, please visit the MPS website under Quality
Assurance.
“MPS” and “The Future of Analog IC Technology” are registered trademarks of
Monolithic Power Systems, Inc.
EV6501AGF-00B EVALUATION BOARD
(L x W x H) 4’’ x 3.4’’ x 1’’ (10cm x 8.5cm x 2.5cm)
Board Number MPS IC Number
EV6501A-F-00B MP6501AGF

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 2
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC
OE1
1
A1
2
A2
3
A3
4
A4
5
A5
6
A6
7
A7
8
A8
9
GND
10
Y8 11
Y7 12
Y6 13
Y5 14
Y4 15
Y3 16
Y2 17
Y1 18
OE2
19 VCC 20
U5
74LVC541P W
100 k
R14
GND
100 nF
C16
GND
PD 0
PD 1
PD 2
PD 3
PD 4
PD 5
PD 6
PD 7
nSL EEP
nR SET
nEN BL
MS 3
MS 2
MS 1
DIR
MCU _STEP
nEN CTL
JP 3
GND
3P3
GND
SCL
SDA
PD 0
PD 1
PD 2
PD 3
PD 4
PD 5
PD 6
PD 7
VBUS
GND
USB_N
USB_P
GND
CLKOU T
5
RDYO/*SLR D
8
RDY1/*SLW R
9
DPLUS
15 DMINUS
16
*IFCLK
20
RESERVRD
21
SDA
23 SCL
22
XTALOUT
11
XTALIN
12
RESET#
49
WAKEUP
51
PD 7/FD15 3
PD 6/FD14 2
PD 5/FD13 1
PB0/FD0 25
GND
4GND
7GND
19 GND
33 GND 35 GND
48
AGND
13 AGND
17
6
24
18
34
39
VCC VCC VCC VCC VCC
VCC
50
10
AVCC AVCC
14
C Y 7C 68013-5
6
PB1/FD1 26
PB2/FD2 27
PB3/FD3 28
PB4/FD4 29
PB5/FD5 30
PB6/FD5 31
PB7/FD7 32
PD 0/FD8 52
PD 1/FD9 53
PD 2/FD10 54
PD 3/FD11 55
PD4//FD12 56
PA 0/INT0# 40
PA 1/INT1# 41
PA2/*SLO E 42
PA3/*W U 2 43
PA4/FIFOA DR0 44
PA5//FIFOA DR 1 45
PA6/PK TEND 46
PA7/*FLA GD /SLCS# 47
CTL0/*FLA GA 36
CTL1/*FLA GB 37
CTL2/*FLA GC 38
CL
K
O
UT
R
D
Y
O
/
*
S
L
RD
R
D
Y
1
/
*
SL
WR
DP
LU
S
D
MI
N
U
S
*
I
F
CL
K
R
E
S
ER
V
R
D
S
D
A
S
C
L
X
T
A
LO
UT
X
T
A
L
I
N
R
E
S
ET
#
W
A
K
EU
P
P
D
7
/F
D
1
5
P
D
6
/F
D
1
4
P
D
5
/F
D
1
3
P
B
0
/
F
D
0
GND
GND
GND
GND
GND
GND
AGND
AGND
VCC
VCC
VCC
VCC
VCC
VCC
AVCC
AVCC
C
Y
7
C
6
8
0
1
3
5
6
5
5
P
B
1/
F
D
1
P
B
2
/
F
D
2
P
B
3
/
F
D
3
P
B
4/
BB
F
D
4
P
B
5
/
F
D
5
P
B
6
/
F
D
5
P
B
7
/
F
D
7
P
D
0
/F
D
8
P
D
1/F
D
9
P
D
2
/F
D
1
0
P
D
3
/F
D
1
1
P
D
4
//
F
D1
2
P
A
0
/I
N
T0
N
N
#
P
A
1/I
N
T1
N
N
#
P
A
2
/
*
S
L
O
E
P
A
3
/
*
W
U
2
P
A
4
/
FIF
O
A
O
O
DR
0
P
A
5
//
F
I
F
F
F
O
FF
A
D
R
1
P
A
6
/
P
K
TEN
D
P
A
7
/
*
F
L
A
G
D
/
S
L
C
S
#
CTL
0
/
*
F
L
A
G
A
CTL
1
/
*
F
L
A
G
B
CTL
2
/
*
F
L
A
G
C
U1
CY 7C 68 013 A
GNDGND
12p F
C12
12p F
C7
47u F
C1
1uF
C10
GND
4.7k
R10
A0
1
SDA 5
A2
3A1
2WP 7
VSS 4
SCL 6
VCC
8
U4
24LC64-E /SM
4.7k
R9
100 k
R4
GND
1
2
3
4
5
P1
GND
100 nF
C14
GND
NS
R8
100 k
R11
GND
GND
100 nF
C8
GND
4.7k
R5
4.7k
R6
1uF
C9
GND
100 nF
C11
100 nF
C6
100 nF
C13
100 nF
C3
GND
1
2
TS2
1
2
P3 SMA J40
1 2
D9
GND
GND
GND
VIN
100uF/50V
C21
GND
nFAULT
nHOME
10157-0001
GND 5
DM 2
VBUS 1
DP 3
ID 4
S1
6
G
N
D
D
M
V
BU
S
D
P
I
D
S
1
S2
7
S3
8
S4
9
S5
10
S6
11
S7
12
S8
13
CN1
GND
1 2
Y1
24MHz
100 nF
C5
100 nF
C2
GND
TP22
GND
VIN
TP21
12
D4
GND
2k
R1
nSL EEP
nR SET
nEN BL
MS 1
MS 2
MS 3
DI R
STEP
VBU S
+
+
-
-
Moto r
Pow er
USB
I2C
P rog
GND
21
D3
ESD9M5.0
GNDGND
GND
21
D1
ESD9M5.0
21
D2
ESD9M 5.0
GND XO
XI
SCL
SDA
nC PU R
100 k
R7
WP
WP
D6
1N4 148
1uF
C15
GND
IN
1OUT 8
GND
4
FB 5
IN
2
GND
9
I
N
O
U
T
G
N
D
F
B
I
N
G
N
D
U2
MP 2013 GQ -33
GND
GND
3P3
SDI
8
SCL
1
nC S/LD
2
VOUTA 5
VOUTB 6
REF
3
VCC
7GND 4
S
D
I
S
C
L
n
C
S
/L
D
V
O
U
T
A
V
O
U
T
B
R
E
F
V
C
C
G
N
D
U3
LTC2 632
SCS
SDA TA
SCLK
GND
3P3
3P3
3P3
3P3
3P3 3P3
3P3
3P3
3P3
SDATA
SCLK
SCS
DACA
DACB

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 3
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
EVALUATION BOARD SCHEMATIC (continued)
GND
CPA 1
CPB 2
VCP 3
VIN 4
AOUT1 5
SENA 6
SENA 7
AOUT2 8
BO UT2 9
SENB 10
SENB 11
BO UT1 12
VIN 13
NSL EEP
14
VG
15
NRSET
16 NEN BL
17
MS3
18 MS2
19 MS1
20
DI R
21 STEP
22
NFAULT 23
NHOME 24
MDS
26
VREF
27
3P3VOUT
28
CP
A
C
P
B
V
C
P
V
I
N
A
O
U
T
1
S
EN
A
S
EN
A
A
O
U
T
2
B
O
UT
2
S
EN
B
S
EN
B
B
O
UT
1
V
I
N
N
S
LEE
P
V
G
N
RS
E
T
N
E
N
B
L
M
S
3
M
S
2
M
S
1
D
IR
S
TE
P
N
F
A
UL
T
N
H
O
M
E
M
D
S
V
RE
F
3P3
V
O
U
T
GND
29
ROSC
25
U6
MP6501A
1
2
3
4
TS1
AOU T1
TP17
AOU T2
TP18
BO UT2
TP19
BO UT1
TP20
NS
1 2
D12
R19
100 m
R18
100 m
GND
GND GND GND GND
100 nF
C22
1uF
C23
100 nF
C24
100 nF
C25
GND
1
2
3
4
P2
AOUT1
AOUT2
SENB
SENA
CPA
CPB
VCP
STEP
DI R
nENBL
nR SET
nSL EEP
MS1
MS2
MS3
VREF
MDS
V3P 3OU T
NS
12
D10
NS
1 2
D11
NS
12
D13
VIN
470 nF
C20
196 k
R17
GND
VG
RO SC
100 nF
C17
100 nF
C18 nH OM E
nFA ULT
100 nF
C19
STEP
TP8
DIR
TP9
nEN BL
TP13
nR SET
TP14
nSL EEP
TP15
MS1
TP10
MS2
TP11
MS3
TP12
STEP
DI R
nENBL
nRSET
nSL EEP
MS1
MS2
MS3
R13
R12
nH OM E
TP6
nFA ULT
TP7
V3P3OU T
TP3
VREF
TP4
MD S
TP5
nH OM E
nFA ULT
V3P3OUT
VREF
MDS
GND
TP16
GND
TP1
GND
TP2
GND
27k
R16
GND
R15
500 k
GND
1
2
3
JP 2
GND
BO UT1
BO UT2
12
D8
1 2
D7
1 2
D5
GND
1K
R3
1K
R2
10k
R20
nH OM E
nFA ULT
FIX
ADJ
ROSC
VIN
HOME
FAU LT
AOU T 1
AOU T 2
BOUT1
BOUT2
AOU T 1
AOU T 2
BOUT1
BOUT2
Step Motor
Install1-2 to u se fi xed ROSC
Install2-3 to use adj. R OSC
These diodes not installed
7
4
1
10
13
16
8
6
5
3
2
9
11
12
14
15
8
7
5
4
2
1
ON
ON
ON
ON
ON
ON
3
6
ON
ON
SW 1
R22 R23 R24
R25 R26
R27
R28
DI R
MS1
MS2
MS3
nENBL
nR SET
nSL EEP
R21
Manual_STEP
GND
3
1
2
SW 3
STEP
MCU_ST EP
Manual_STEP
3
1
2
SW 4
3
1
2
SW 5
MDS_ R-DIV
REF _R-DIV
R29
R30
GND
V3P 3OU T
MD S_R-DIV
VCC
VCC
VCC_ GND
GND
3
1
2
SW 6
VCC
Vp u
Vpu
REF _R-D IV
3P3
DACB
DACA
VCC

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 4
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
EV6501AGF-00B BILL OF MATERIALS
Qty Ref Value Description Package Manufacturer Part Number
1 C1 47µF
Ceramic Capacitor,
6.3V, X6S 1206 muRata GRM31CC80J476ME18L
15
C2, C3,
C5, C6,
C8, C11,
C13, C14,
C16, C17,
C18, C19,
C22, C24,
C25
100nF Ceramic Capacitor,
50V, X7R 0603 muRata GRM188R71H104KA93D
2 C7, C12 12pF Ceramic Capacitor,
50V, C0G 0603 muRata GRM1885C1H120JA01
4 C9, C10,
C15, C23 1µF Ceramic Capacitor, 16V, X7R 0603 muRata GRM188R71C105KA12D
1 C20 470nF
Ceramic Capacitor,
16V, X7R 0603 muRata GRM188R71C474KA88D
1 C21 100µF
Electrolytic Capacitor,
50V, Electrolytic DIP Rubycon 50YXF100MEFC
1 R1 2kFilm Resistor, 1% 0603 Yageo RC0603FR-072KL
10
R2, R3,
R21, R22,
R23, R24,
R25, R26,
R27, R28
1kFilm Resistor, 1% 0603 Yageo RC0603FR-071KL
4 R4, R7,
R11, R14 100kFilm Resistor, 1% 0603 Yageo RC0603FR-07100KL
8
R5, R6,
R9, R10,
R12, R13,
R29, R30
4.7kFilm Resistor, 1% 0603 Yageo RC0603FR-074K7L
1 R8 NS
1 R15 500kSquare Trimming
Potentiometer Bourns 3266W-1-504LF
1 R16 27kFilm Resistor, 1% 0603 Yageo RC0603FR-0727KL
1 R17 196kFilm Resistor, 1% 0603 Yageo RC0603FR-07196KL
2 R18, R19 100mSense Resistor, 1%,
2W 2512 CYNTEC RL-3264-9-R100-FN
1 R20 10kFilm Resistor, 1% 0603 Yageo RC0603FR-0710KL
3 D1, D2, D3 TVS SOD-923 On Semi ESD9M5.0S
4 D4, D5,
D7, D8 LED, Red 0805 BRIGHT LED BL-HUF35A-TRB

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 5
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
EV6501AGF-00B BILL OF MATERIALS ( continued )
Qty Ref Value Description Package Manufacturer Part Number
1 D6
Schottky Diode, 75V,
0.15A SOD-123 Diodes 1N4148W
5
D9, D10,
D11, D12,
D13
NS
1 U1 USB Microcontroller TSSOP56 Cypress CY7C68013A-56PVXC
1 U2
Low-Power Linear
Regulator
QFN8
(3X3mm) MPS MP2013GQ-33
1 U3 DAC 8-Lead
TSOT-23
Linear
Technology LTC2632ACTS8
1 U4
64K-bit, 400kHz, 2.5V,
I2C Serial EEPROM SO8 Microchip 24LC64-E/SN
1 U5
Octal Buffer and Line
Driver with 3-State
Outputs
TSSOP20 NXP 74LVC541APW,118
1 U6 Stepper Motor Driver TSSOP-
28 EP MPS MP6501AGF
1 Y1 Crystal Oscillator DIP Citizen HC49US-24.000MABJ-UB
1 CN1 MICROUSB Molex 10157-0001
1 JP2
3-Bits/2.54mm
Connector
1 JP3, P3 2-Bits/2.54mm
Connector
1 P1
5-Bits/2.54mm
Connector
1 P2
4-Bits/2.54mm
Connector
1 SW1 8-Bits Button SMD Wurth 418121270808
4 SW3, SW4,
SW5, SW6 Button DIP Wurth 450301014042
1 TS1 Header, 4-Pin Phoenix Contact 1729144
1 TS2 Header, 2-Pin Phoenix Contact 1729128
9
VCC,
VCC_GND,
VIN,
VIN_GND,
AOUT1,
AOUT2,
BOUT1,
BOUT2,
GND
1.0 公针
1 V3P3OUT 1-Bit/2.54mm
Connector
1 Other Test
Points 31-Bits/2.54mm
Connector

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 6
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
PRINTED CIRCUIT BOARD LAYOUT
FIGURE 1. Top Silk Layer
FIGURE 2. Top Layer FIGURE 3. Bottom Layer

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 7
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
QUICK START GUIDE
The power and control signals for the EV6501AGF-00B are applied through the terminal
block TS2 or the header connector P3.
Each pin in the connector is labeled on the EVB.
The supplied voltage should be between 8V and 35V (12V or 24V nominal in most cases).
The stepper motor is connected to terminal block TS1 or connector P2. Each pin is labeled.
Controlling the MP6501A using the On-Board USB Microcontroller and PCB GUI
Program:
1. Place a jumper on JP3, nENCTRL.
2. Set all of the switches on the DIP switch SW1 to “off.”
3. To use the DIP switch or to drive signals externally to the test points, remove the jumper
from JP3.
4. To use a fixed off time, set by R17 (196k), place a jumper across the pins labeled “FIX” on
header JP2.
5. To use the trim pot to adjust the off time, place the jumper on the pins labeled “ADJ.”
SW3 selects either an internally generated STEP signal or an externally generated
STEP signal.
SW4 selects either a fixed voltage for the VREF input or the on-board DAC, which is
set by the GUI.
SW5 selects either a fixed voltage for the MDS input or the on-board DAC, which is
set by the GUI.
SW6 selects between a 3.3V voltage for the pull-up resistors or an externally
supplied voltage.
.
The LED D5 indicates the status of FAULT. When over-temperature protection or over-current
protection occurs, nFAULT is pulled down to a low level and lights up the LED.
R18 and R19 are the current-sense resistors connected directly to SENA and SENB, respectively.
The other sides of these resistors are connected to GND. The resistors, in conjunction with the
voltage applied to VREF, control the current through the MP6501A.

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 8
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
GUI OPERATION
A PC based GUI program is used to control the EV6501AGF-00B from a Windows PC. Connect the
board to a USB port on the computer.
When launched, the GUI shows selection buttons for three pages as shown below:
When the “Monitor” button is clicked, the screen below is displayed:
From this screen, a reset pulse can be generated for the MP6501A by pressing “Reset.” You can enter
or exit sleep mode by pressing “Sleep.” Pressing “Enable” will enable or disable the MP6501A.
*Note that the MP6501A must be enabled before trying to move the motor using the next screen.

EV6501A – EVB DESCRIPTION
EV6501A Rev.1.0 www.MonolithicPower.com 9
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
If a fault condition (over temperature, over current, etc.) is encountered, the “Fault” button will illuminate.
When the “Basic Input” button is clicked, the screen below is displayed:
Step mode (from 1/16-step to full-step) and the step direction are selectable.
Entering a numeric value in the “Peak Current” box sets the peak winding current (the value assumes a
100msense resistor, which is normally installed on the EVB).
Decay mode can be selected. Select automatic decay mode or enter a numeric value for the fast decay
portion of mixed decay (for slow decay enter “1,” for fast decay, enter “100”).
The “Speed Control” section allows you to set a number of steps for ramp up and ramp down, a number
of steps to run at the target step rate, and the frequency (step rate) in Hz or PPS. The resulting ramp-
up, run, and ramp-down times are displayed.
Once these parameters are set, press the “Program” button and the motor will move as programmed.

EV6501A – EVB DESCRIPTION
NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications.
Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS
products into any application. MPS will not assume any legal responsibility for any said applications.
EV6501A Rev.1.0 www.MonolithicPower.com 10
3/9/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
When the “Output Demo” button is clicked, the screen below is displayed:
This screen shows diagrammatically the winding currents for the selected decay and step modes.

Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
Monolithic Power Systems (MPS):
EV6501AGF-00B