Download AN 043 1/9 E521.14 CAN/LIN SBC WITH DC/DC BUCK

AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
E521.14 CAN/LIN SBC WITH DC/DC BUCK-BOOST CONVERTER
Figure 1. Evaluation Board
1What you get
1. Evaluation board
2. Board description (this document)
2What you need in addition
1. An external Power supply for input voltage VIN between 3V and 40V, capable of adequate current.
2. Appropriate equipment to control and check CAN/LIN signals (µC development kit or similar), measurement equipment (Scope, Scopemeter, logic analyzer etc.)
3Features Evaluation Board
1.
2.
3.
4.
5.
6.
7.
8.
4 LIN and 1 high-speed CAN interfaces with DB9 connectors (Vector board compatible)
96 and 22 pin header for µC development or similar equipment
Master or Slave individual settings for every LIN interface
Symmetric CAN interface termination (configurable via jumper settings)
Bypass CAN EMC input circuit Common Mode Choke possible
Onboard buck DC-DC converter for VDD1
Low drop linear voltage Regulator for VDD2, short circuit protected to GND and battery.
Input voltage boost converter (can be deactivated by solder joints)
Elmos Semiconductor AG
Application Note 1/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
9. Jumper settings for CAN bus termination and high-speed CAN
10.VDD1/VDD2 selection for VDD_CAN via jumper setting
11.Software debugging mode via jumper setting
12.Onboard Wake-up switch and external wake-up input
13.VDD2 enable via jumper setting
14.Fail Safe Output
4Start of Operation
1. Connect all CAN and LIN buses to the interfaces, connect the test equipment to the 96 or 24 pin header. If not needed, deactivate the input voltage boost converter by opening the solder bridge SJ5 (close the solder bridge SJ3 in this case).
2.
Adjust the Power Supply unit to the desired input voltage within 6 and 40V, adjust the PSU to adequate current
limitation. After starting up above 6V and correct configuration it is possible to go down to typically 4V. For
further restrictions look at the data sheet. Note that the supply current can be high at low input voltage when
the input voltage boost converter is active. Connect the PSU to the VIN and GND terminals (clamp AK1).
3. Turn the PSU output on.
5Functional Description
General
The evaluation board is built of a set of interfaces and two DC-DC converters in different topologies: The 1st converter operates in boost topology to ensure the full operability of the SBC in case of cold-crank situations, and the
2nd converter operates in buck topology to provide the supply voltage for the CAN interface and the functional
parts of the SBC and its environment (VDD1, +5V). A linear voltage regulator provides VDD2 (+5V). The VDD2
regulator can be enabled or disabled via Jumper JP3. The converters operate with their own switching frequency,
controlled by duty cycle, the external components and (to a lesser extend) the load current. The internal PFM controllers operate as bang-bang regulators, and the switching frequency depends mainly on the input voltage. The
interface will start operation after the internal Reset time. On the output circuitry (pin header CON1), CAN and LIN
RxD and TxD signals are provided for further processing. Interrupt- Wake-up and RESET signals can be connected
and supplied via CON1. A Fail- safe operation of the SBC ensures operability in case of failures. The Fail- safe operation status is signalized by an LED (“fail- safe on”, red). To provide the supply voltage at the LIN interfaces, the
jumper VS_ON can be set. At the pin header CON1, a SPI to an external µC is available.
Jumper configuration of the CAN interface.
For the CAN interface, different options can be set via jumpers.
Table 1. CON 5
CON5.x
Remark
1to2
Closed: CANTXD connected to X31.B6
1to2
Open: CANTXD not connected to X31.B6
3to4
Closed: CANRXD connected to X31.B7
3to4
Open: CANRXD not connected to X31.B7
Elmos Semiconductor AG
Application Note
2/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
Jumper
Effect
JP1, JP5
Input choke bypassing option: The jumpers set the input circuit CMC choke inactive (bypassed)
to facilitate the EMC behaviour analysis with or w/o the CMC choke. To activate the input
circuit CMC choke, remove the jumpers JP1 and JP5. In all cases, set or remove both jumpers.
JP2, JP6
Symmetric bus termination: To set the bus termination off, remove the jumpers.
For High- Speed CAN data transmission, set the jumpers.
JP12
VDDCAN setting: To set VDDCAN to +5V (VDD1), set 1-2, for VDDCAN = 5 V (VDD2), set 2-3.
When VDD2 is applied, set JP12 in 1-2 position (VDD2 enable)
Jumper configuration of the LIN interfaces.
CON 2 and CON1
Table 2. CON 2 and CON1
CONv.x to CONy.z
Remark
2.2-1.1
LIN1 RXD to central LIN RXD (X31.B4)
2.4-1.2
LIN2 RXD to central LIN RXD (X31.B4)
2.6-1.3
2.2-2.1
2.4-2.3
2.6-2.5
LIN3 RXD to central LIN RXD (X31.B4)
2.8-1.4
LIN4 RXD to central LIN RXD (X31.B4)
2.8-2.7
Each LIN has his dedicated LIN RXD Pin on X31
All other
Not supported.
Table 3. CON 4 and CON3
CONv.x to CONy.z
Remark
4.2-3.1
LIN1 RXD to central LIN TXD (X31.B4)
4.4-3.2
LIN2 RXD to central LIN TXD (X31.B4)
4.6-3.3
LIN3 RXD to central LIN TXD (X31.B4)
4.8-3.4
LIN4 RXD to central LIN TXD (X31.B4)
4.2-3.1
4.4-3.2
4.6-3.3
4.8-3.4
Each LIN TXD are connected to central LIN TXD (X31.B4). For measurement purpose only.
4.2-4.1
4.4-4.3
4.6-4.5
4.8-4.7
Each LIN has his dedicated LIN TXD Pin on X31
All other
Not supported.
For the LIN1 – LIN4 interfaces, the Master/Slave configuration can be set.
Jumper
Effect
JP8
LIN Master termination of LIN1. To set the interface to Master, set the jumper 2-3. Otherwise 1-2.
JP11
LIN Master termination of LIN2. To set the interface to Master, set the jumper 2-3. Otherwise 1-2.
JP14
LIN Master termination of LIN3. To set the interface to Master, set the jumper 2-3. Otherwise 1-2.
JP15
LIN Master termination of LIN4. To set the interface to Master, set the jumper 2-3. Otherwise 1-2.
Elmos Semiconductor AG
Application Note
3/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
Miscellaneous configuration jumpers
The miscellaneous jumpers can be set to control different functions of the SBC resp. signal pull-up resistors:
Jumper
Effect
JP10
Software debugging mode on – set the jumper to avoid reset during software debugging. This
Signal could be over-written by X31.A24.
JP9
VDD2 enable – close 1-2 to activate the internal LDO and provide VDD2 to the board and/or external load. Open to disable VDD2. A open Jumper could be over-written by X31.A7
JP13
Fail safe LED on – set the jumper to signalize Fail safe state by the Fail safe LED
JP7
Pull-up resistor for INTN. The INTN terminal is pulled up to VDD1 when set. This Signal could be
over-written by X31.A26, ecept SJ4 is closed.
JP3
Not in use
Wake- up Switch WK1
The switch WK1 has 3 positions – Low position pulls down the WK signal. The neutral position enables external
control of the Wake-up signal, high position pulls up the Wake- up signal. The SBC can be configured to react on
the rising or/ and the falling edge. With the switch you can generate both. Note that the external Wake-up input
signal can be influenced by the switch.
Elmos Semiconductor AG
Application Note
4/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
6Evaluation Board Schematic
Circuit around T2 & T3 make WK
controllable for demo application
EEP (IC1) non volatile memory for parameter of demo application
Circuit around T1A make INTN controllable for demo application
Circuit around T4 is for
enable VDD2
Circuit R24 R
R25 is for
Measure
Circuit around
T5 & T6 is for
measure
supplies
With dotted lines framed circuit parts are
used if the EVA Board is controlled by a
Demo application trough X31
Figure 2. Evaluation board
Figure 3. LIN part
Elmos Semiconductor AG
Application Note
5/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
7Evaluation Board Assembly
LIN4
Connector
CAN
Connector
SCK
CSN
TXDLIN1_IC
GND
SDI
RXDLIN2_IC
RXDLIN1_IC
SDO
TXDLIN2_IC
RSTN
INTN
TXDLIN3_IC
RXDLIN3_IC
EN_FSON_LED
closed=enabled
JP10 SWDM enabled if
closed
JP9 EN_VDD2
1-2=enabled
open=Disabled
SJ3 Step-Up
open=enabled
closed=disabled
JP3 not in use
12V DC
Input
JP8 LIN1
Termination
1-2= Slave
2-3= Master
RXDCAN_IC
RXDCAN
JP11 LIN2
Termination
1-2=Slave
2-3=Master
LIN2
Connector
JP13
TXDCAN
(central)
JP14 LIN3
Termination
1-2=Slave
2-3=Master
LIN3
Connector
4
3
CON3/4
LIN TXD
Source
TXDCAN_IC
RXDCAN_IC
TXDLIN4_IC
RXDLIN4_IC
GND
MDRV
TXD
CON1/2
LIN RXD
Source
SJ5 Step-Up
open=disabled
closed=enabled
JP16
deliver
RSTN to
MCU
Board if
enabled
TXDCAN_IC
TXDLINx_IC
RXD (central)
JP7 INTN
externally
pulled-up if
closed
WK
TXDx (decentral)
RXDLINx_IC
JP1 & JP5
CMC Choke
Bypass
GND
2
4
3
2
1
RXDx (decentral)
1
JP12 CAN
Supply 12=VDD1
2-3=VDD2
JP2 & JP6
CAN
Termination
MDRV
JP15 LIN4
Termination
1-2=Slave
2-3=Master
JP17
enable
supply
for LIN
pull-ups
LIN1
Connector
Figure 4. Top side
SJ4 INTN PullUp enabled if
closed
Figure 5. Bottom side
Elmos Semiconductor AG
Application Note
6/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
Connectors legend
CON1 – test and communication port
Pin
Legend
1
GND (Ground)
2
RxDLIN1_IC
3
CSN (CS)SPI
4
TxDLIN1_IC
5
SCKSPI
6
RxDLIN2_IC
7
SDI (MOSI)SPI
8
TxDLIN2_IC
9
SDO (MISO)SPI
10
RxDLIN3_IC
11
INTN (Interrupt)
12
TxDLIN3_IC
13
RSTN (RESET)
14
RxDLIN4_IC
15
WK (Wake Input, Vs tolerant)
16
TxDLIN1_IC
17
FSON (Fail Safe Output, open drain output, Vs tolerant)
18
RXDCAN_IC
19
MDRV (Output which steer the MOS Fet of step-up converter)
20
TXDCAN_IC
21
GND (Ground)
22
GND (Ground)
AK1 – Power Supply
Pin
Legend
1
VBAT – input voltage in 12V automotive range
2
Ground
X31 – Demo
Documented in future revision.
Elmos Semiconductor AG
Application Note
7/9
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
8Parts List
Used
Pos.-Nr.
Value
Order-Nr.
1
4
4
3
1
1
1
1
1
3
4
4
5
5
1
2
4
4
1
1
10
1
1
5
1
1
1
1
1
5
2
8
1
2
2
1
2
8
1
1
1
8
AK1
C1, C5, C6, C23
C10, C21, C26, C29
C11, C13, C15
C14
C18
C2
C3
C4
C7, C12, C22
C8, C19, C24, C27
C9, C20, C25, C28
CAN, LIN1, LIN2, LIN3, LIN4
CON1, CON2, CON3, CON4, CON5
D1
D2, D5
D3, D6, D8, D10
D4, D7, D9, D11
IC1
IC2
JP1, JP2,JP5, JP6, JP7, JP9, JP10, JP13, JP16, JP17
JP3
JP4
JP8, JP11, JP12, JP14, JP15
L1
L2
L3
LED1
Q1
R1, R9, R28, R32, R37
R10, R61
R11, R14, R34, R35, R40, R42, R52, R54
R16
R2, R3
R23, R62
R24
R25, R45
R33, R41, R43, R44, R55, R56, R58, R59
R36
R38
R39
R4, R19, R26, R27, R29, R30, R31, R57
R5, R6, R7, R8, R12, R13, R15, R17, R18, R20, R21, R22,
R46, R47, R48, R49, R50, R51
R53
R60
SW1
T1, T2, T4, T5, T6
T3
X31
AK130/02
100n/50V
330pF/50V
33n/16V
22µF/6.3V
22n/50V
4.7nF/50V
22µF/50V
100µF/50V
10µF/10V
220p/50V
22pF/50V
F09H
X04R
PMEG6030EP
MUH1PB
TS4148
PESD1LIN
24LC64
521.14
JP1E
JP2E
PINHD-2X11_2.54
JP2E
B82789C104N
LPS6225-222
LPS6225-333
Failsafe
FDS5680
10k0
0R0
2k0
3R3
62R0
R062
33k0
56k0
30k0
22k
4k7
620R
1k0
ARK130/2
399-1170-1-ND
CCPF330K0805
311-1374-1-ND
PCE4510CT-ND
1414682
709-1194-6-ND
338-2741-1-ND
VF 100/50 K-F
493-3682-1-ND
CCPF220K0603
399-1053-1-ND
D-SUB BU 09EU
MPE 087-2-004
568-6530-1-ND
2098037
8150206
568-4033-1-ND
AT24C64D-SSHM-TCT-ND
E521.14
MPE 087-1-002
MPE 087-1-003)
SL 2X50G 2,54 (broken)
MPE 087-1-003)
B82789C104N2-ND
LPS6225-222
LPS6225-333
SMD-LED 0805 RT
FDS5680CT-ND
RL0603K010-1
RMCF0805ZT0R00CT-ND
RL0805K002.0-1
RP16S3.3FCT-ND
P62.0CCT-ND
RHM.062RCT-ND
1469801
RMCF0603JT56K0CT-ND
715623
P22.0KHCT-ND
P4.7KHCT-ND
541-620ACT-ND
P1.00KHCT-ND
330R
0R0
0R0
TL37PO
MUN5313
BC847
FABC96R
RMCF0603JT330RCT-ND
CR0603E000
RMCF1206ZT0R00CT-ND
TL37PO
MUN5313DW1T1GOSCT-ND
BC847B-7FDICT-ND
DIN-096RSC-SR1-HM-ND
18
1
1
1
5
1
1
Elmos Semiconductor AG
Application Note
8/9
Supplier
Remark
Schukat
Digikey
0805
Digikey
0805
Digikey
0805
Digikey
4,3mm x 4,3mm
Farnell
0805
Digikey
0805
Digikey
6,6mm x 6,6mm
Reichelt
6,3mm x 6,3mm
Digikey
4,3mm x 4,3mm
Schukat
0603
Digikey
0603
Reichelt
D-SUB 9 female TH
Reichelt
2x2 pin header
Digikey
SOD128
Farnell
MicroSMP
Farnell
0805
Digikey
SOD323
Digikey
SO8
ELMOS
QFN44L7
Reichelt broken pin header SIL
Reichelt broken pin header SIL
Reichelt
broken
Reichelt broken pin header SIL
Digikey
Coilcraft
direct call
Coilcraft
direct call
Reichelt
Digikey
Schukat
0603
Digikey
0805
Schukat
0805
Digikey
0603
Digikey
0805
Digikey
1206
Farnell
0603
Digikey
0603
Farnell
0603
Digikey
0603
Digikey
0805
Digikey
0805
Digikey
0603
Digikey
Schukat
Digikey
Reichelt
Digikey
Digikey
Digikey
Manufacturer
PTR Messtechnik
Kemet
Kemet
Panasonic
Kemet
Kemet
CDE
Nichicon
Nichicon
Kemet
MPE Garry
NXP
Vishay
NXP
Atmel
ELMOS
MPE Garry
MPE Garry
MPE Garry
MPE Garry
Würth
Coilcraft
Coilcraft
OSRAM
Fairchild
Stackpole
Rohm
Stackpole
Panasonic
Panasonic
Vishay Dale
Panasonic
0603
0603
1206
Stackpole
Stackpole
SOT363
BC846 SOT23
female
ON Semi
Diodes
3M
QM-No.: 25AN0043E.01
AN 043
E521.14 EVALUATION BOARD
APR 23, 2014
Usage restrictions
Elmos Semiconductor AG provide the E521.14 Evaluation board simply and solely for IC evaluation purposes in laboratory. The Kit or any part of the Kit must not be used for other purposes or within non laboratory environments. Especially the use or the integration in production systems, appliances or other installations is prohibited.
Disclaimer
Elmos Semiconductor AG shall not be liable for any damages arising out of defects resulting from (1) delivered hardware or software, (2) non observance of instructions contained in this document, or (3) misuse, abuse, use under
abnormal conditions or alteration by anyone other than Elmos Semiconductor AG. To the extend permitted by law
Elmos Semiconductor AG hereby expressively disclaims and user expressively waives any and all warranties of merchantability and of fitness for a particular purpose, statutory warranty of non-infringement and any other warranty
or product liability that may arise by reason of usage of trade, custom or course of dealing.
Elmos Semiconductor AG – Headquarters
Heinrich-Hertz-Str. 1 | 44227 Dortmund | Germany
Phone + 49 (0) 231 - 75 49 - 100 | Fax + 49 (0) 231 - 75 49 - 159
[email protected] | www.elmos.com
Note Elmos Semiconductor AG (below Elmos) reserves the right to make changes to the product contained in this publication without notice. Elmos assumes no responsibility for the use of any circuits
described herein, conveys no licence under any patent or other right, and makes no representation that the circuits are free of patent infringement. While the information in this publication has been
checked, no responsibility, however, is assumed for inaccuracies. Elmos does not recommend the use of any of its products in life support applications where the failure or malfunction of the product
can reasonably be expected to cause failure of a life-support system or to significantly affect its safety or effectiveness. Products are not authorized for use in such applications.
Copyright © 2014 Elmos Reproduction, in part or whole, without the prior written consent of Elmos, is prohibited.
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