Motherboard Design Guide
Requirements for Components of Third-party Suppliers
maxon motor control
4-76
Document ID: rel5977
EPOS4 Positioning Controller
Edition: February 2016
EPOS4 Module/Compact 50/8 Hardware Reference
© 2016 maxon motor. Subject to change without prior notice.
4.1.5
Recommended Components and Manufacturers
Table 4-66
Motherboard Design Guide – Recommended components
Recommended components
Socket
header
Straight socket header, pluggable with 0.64 x 0.64 mm pin headers, 2.54 mm pitch, contact length 6 mm,
current rating per pin = I
cont
/ 4, contact material: gold
16 poles, 2 rows:
• Samtec (SSM-116-x-DV)
SMT, 5.2 A per pin, 7.37 mm
• E-Tec (BS2-032-H750-55)
SMT, 3 A per pin, 7.50 mm
• FCI (91618-316LF)
SMT, 3 A per pin, 7.20 mm
• Samtec (SSW-116-0x-x-D)
THT, 5.7 A per pin, 8.51 mm
• E-Tec (BL2-032-S842-55)
THT, 3 A per pin, 8.50 mm
• FCI (87606-316LF)
THT, 3 A per pin, 8.50 mm
23 poles, 2 rows:
• Samtec (SSM-123-x-DV)
SMT, 5.2 A per pin, 7.37 mm
• E-Tec (BS2-046-H750-55)
SMT, 3 A per pin, 7.50 mm
• FCI (91618-323LF)
SMT, 3 A per pin, 7.20 mm
• Samtec (SSW-123-0x-x-D)
THT, 5.7 A per pin, 8.51 mm
• E-Tec (BL2-046-S842-55)
THT, 3 A per pin, 8.50 mm
• FCI (87606-323LF)
THT, 3 A per pin, 8.50 mm
Fuse
(FU1)
• Littelfuse 456 series, SMD NANO2 Fuse 20 A, 18 A
2
sec (0456 020)
TVS Diode
(D1; D2)
• Vishay (SMBJ54A)
U
R
= 54 V, U
BR
= 60.0…66.3 V @ 1 mA, U
C
= 87.1 V @ 6.9 A
• Fairchild (SMBJ54A)
U
R
= 54 V, U
BR
= 60.0…66.6 V @ 1 mA, U
C
= 87.1 V @ 6.9 A
• Littelfuse (SMBJ54A)
U
R
= 54 V, U
BR
= 60.0…66.6 V @ 1 mA, U
C
= 87.1 V @ 6.9 A
Capacitor
(C1)
The ripple current load for C1 depends on the motor’s operating point and the power supply output capacity.
Under worst case conditions however, the ripple current may reach I
cont
/ 2. Use capacitors with rated
voltage
≥
63 V and adequate ripple current to avoid overheat or life time reduction.
Example for C1 worst-case dimensioning:
I
cont
= 12 A
3x Panasonic (EEU-FR1J391); 390
μ
F, 63 V, 2000 mA r.m.s., ØxL 12.5 x 25 mm
Motor Choke
(L)
Inductance:
Rated current: I
rms
≥
I
cont
; I
sat
≥
I
peak
Construction: shielded
2.2
μ
H:
• Bourns (SRP1265A-2R2M)
I
rms
22 A, I
sat
37 A, 12.5 x 13.5 x 6.4 mm
• Vishay (IHLP5050FDER2R2M01)
I
rms
22 A, I
sat
40 A, 12.9 x 13.2 x 6.5 mm
• Laird (MGV12072R2M-10)
I
rms
22 A, I
sat
40 A, 12.6 x 13.5 x 6.5 mm
22
μ
H:
• Würth (WE-PD-XXL / 7447709220) I
rms
5.3 A, I
sat
6.5 A, 12.5 x 12.5 x 10mm
Motor Filter
Example 1
• Motor Choke L
22
μ
H
• Filter Capacitor Cf
150 pF, 100 V
• Snubber Capacitor Cs
330 pF, 100 V
• Snubber Resistor Rs
390
Ω
, 0.125 W
Example 2
• Motor Choke L
2.2
μ
H
• Filter Capacitor Cf
220 pF, 100 V
• Snubber Capacitor Cs
470 pF, 100 V
• Snubber Resistor Rs
100
Ω
, 0.25 W