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EVAL6208Q
Stepper motor driver mounting the L6208Q
Data brief
AM11912v1
Features
 Voltage range from 8 to 52 V
 Phase current up to 2.5 Ar.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.
June 2013
DocID023044 Rev 2
For further information contact your local STMicroelectronics sales office.
1/11
www.st.com
Contents
EVAL6208Q
Contents
1
Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2
Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3
Bill of material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4
Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2/11
DocID023044 Rev 2
EVAL6208Q
1
Board description
Board description
Table 1. Electrical specifications
Parameter
Value
Supply voltage (VS)
8 to 52 V
Maximum output current (each phase)
2.5 Ar.m.s.
Low level logic input voltage
0V
High level logic input voltage
5 V / 3.3 V(1)
3.3 V(2)
Maximum VREFA/VREFB input voltage (J2 connector)
Switching frequency
Up to 100 kHz
Operating temperature
- 25 to +125 °C
L6208Q thermal resistance junction-to-ambient
17 °C/W
1. Logic inputs are 3.3 V and 5 V compliant.
2. Equivalent to about 3.1 A peak current.
Figure 1. Trimmer and connector locations
Power supply connector
(8 V - 52 V)
Application
reference area
Phase A connector
Phase B connector
Control board
connector
Phase B tOFF regulation
Phase A tOFF regulation
DocID023044 Rev 2
AM12707v1
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Board description
EVAL6208Q
Table 2. Control board connector pinout (J2)
4/11
Pin
Type
Function
2
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
14
Supply voltage
16
Logic input
23
Ground
24
Analog output
Board identification system ID0
25
Analog output
Board identification system ID1
28
Ground
29
Logic output
30
Logic input
Others
Unconnected
Ground
Ground
3.3 V supply voltage
Device enable input (EN input of L6208Q)
Ground
Ground
Fault output (EN output of L6208Q)
Step mode selection input (HALF/FULL input of L6208Q)
DocID023044 Rev 2
99
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DocID023044 Rev 2
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EVAL6208Q
Schematic
Schematic
Figure 2. Schematic
$0 Y
5/11
11
Bill of material
3
EVAL6208Q
Bill of material
Table 3. Bill of material
6/11
Index
Quantity
Reference
Value
Package
1
1
C1
220 nF /16 V
CAPC-0603
2
1
C2
100 µF / 63 V
CAPES-R10H10
3
1
C2A
100 µF / 63 V (OPTION)
CAPE-R8H12-P35
4
2
C3, C5
100 nF / 4 V
CAPC-0603
5
2
C4, C6
100 nF / 100 V
CAPC-0805
6
1
C7
10 nF / 100 V
CAPC-0805
7
1
C8
5.6 nF / 6.3 V
CAPC-0603
8
2
C9, C10
68 nF / 6.3 V
CAPC-0603
9
2
C11, C12
820 pF / 6.3 V
CAPC-0603
10
1
D1
BAV99
SOT23
11
3
J1, J3, J4
Screw connector 2 poles
MORSV-508-2P
12
1
J2
Pol. IDC male header
vertical 30 poles
CON-FLAT-15X2-180M
13
1
R1
NM
RESC-0603
14
1
R2
10 k/ 1%
RESC-0603
15
1
R3
0
RESC-0603
16
1
R4
20 k /1%
RESC-0603
17
1
R5
100 
RESC-0603
18
1
R6
100 k
RESC-0603
19
2
R7, R10
4.3 
RESC-0603
20
1
R8
10 k
RESC-0603
21
2
R9, R11
1 k
RESC-0603
22
2
R12, R13
200 k
TRIMM-100x50x110-64W
23
4
R14, R15, R16, R17
0.4  / 1 W
RESC-2512
24
2
R18, R19
12 k
RESC-0603
25
5
R20, R21, R22, R23,
R24
56 k
RESC-0603
26
1
TP1
TPTH-RING-1MM RED
TH
27
2
TP2, TP3
TPTH-RING-1MM
BLACK
TH
28
1
U1
L6208Q
QFN7x7_48
DocID023044 Rev 2
EVAL6208Q
4
Layout
Layout
Figure 3. Layout (silk screen)
AM11914v1
Figure 4. Layout (top layer)
AM11915v1
DocID023044 Rev 2
7/11
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Layout
EVAL6208Q
Figure 5. Layout (inner layer 2)
AM12696v1
Figure 6. Layout (inner layer 3)
AM12697v1
8/11
DocID023044 Rev 2
EVAL6208Q
Layout
Figure 7. Layout (bottom layer)
AM12698v1
DocID023044 Rev 2
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Revision history
5
EVAL6208Q
Revision history
Table 4. Document revision history
Date
Revision
03-Apr-2012
1
Initial release.
2
Updated Description on page 1 (replaced “communication board” by
“demonstration board“).
Added Contents on page 2.
Added headings to Section 2: Schematic to Section 4: Layout.
Updated Table 1 (removed superfluous “EVAL6208Q” from title,
added value and unit for “thermal resistance junction-to-ambient”).
Updated Figure 2 (removed “EVAL6208Q” from title, completed
units, minor modifications).
Updated Table 3 (removed “EVAL6208Q” from title, corrected unit in
row 23).
Updated Figure 3 to Figure 7 (removed “EVAL6208Q” from titles).
Minor corrections throughout document.
07-Jun-2013
10/11
Changes
DocID023044 Rev 2
EVAL6208Q
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