1 What you get 2 What you need in addition 3 Features ... · PDF file1 What you get 2 What you need in addition 1. Evaluation board 2. Board description (this document) Figure 1. Evaluation

Elmos Semiconductor AG Application Note QM-No.: 25AN0043E.01

AN 043E521.14 EVALUATION BOARDAPR 23, 2014

1/9

E521.14 CAN/LIN SBC WITH DC/DC BUCK-BOOST CONVERTER

1 What you get

2 What you need in addition

1. Evaluation board2. Board description (this document)

Figure 1. Evaluation Board

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.)

1. 4 LIN and 1 high-speed CAN interfaces with DB9 connectors (Vector board compatible)2. 96 and 22 pin header for µC development or similar equipment3. Master or Slave individual settings for every LIN interface 4. Symmetric CAN interface termination (configurable via jumper settings)5. Bypass CAN EMC input circuit Common Mode Choke possible6. Onboard buck DC-DC converter for VDD1 7. Low drop linear voltage Regulator for VDD2, short circuit protected to GND and battery.8. Input voltage boost converter (can be deactivated by solder joints)

3 Features Evaluation Board

AN 043

2/9


E521.14 EVALUATION BOARDAPR 23, 2014

4 Start of Operation

5 Functional Description

9. Jumper settings for CAN bus termination and high-speed CAN10. VDD1/VDD2 selection for VDD_CAN via jumper setting11. Software debugging mode via jumper setting12. Onboard Wake-up switch and external wake-up input13. VDD2 enable via jumper setting14. Fail Safe Output

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.

GeneralThe evaluation board is built of a set of interfaces and two DC-DC converters in different topologies: The 1st con-verter 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 con-trollers 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 op-eration status is signalized by an LED (“failsafe 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.

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

Table 1. CON 5

3/9

AN 043



Jumper configuration of the LIN interfaces.CON 2 and CON1

For the LIN1 – LIN4 interfaces, the Master/Slave configuration can be set.

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)

CONv.x to CONy.z Remark

2.2-1.1 LIN1 RXD to central LIN RXD (X31.B4)




2.2-2.1 2.4-2.3 2.6-2.5 2.8-2.7 Each LIN has his dedicated LIN RXD Pin on X31

All other Not supported.

CONv.x to CONy.z Remark

4.2-3.1 LIN1 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 meas-urement 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.

Jumper Effect

JP8 LIN Master termination of LIN1. To set the interface to Master, set the jumper 2-3. Otherwise 1-2.




Table 2. CON 2 and CON1

Table 3. CON 4 and CON3

AN 043

4/9



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.

Miscellaneous configuration jumpersThe 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 ex-ternal 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

5/9

AN 043



With dotted lines framed circuit parts areused if the EVA Board is controlled by a Demo application trough X31

EEP (IC1) non volatile memory for parameter of demo application

Circuit around T1A make INTN controllable for demo application

Circuit around T2 & T3 make WK controllable for demo application

Circuit around T5 & T6 is for

measure supplies

Circuit around T4 is for enable VDD2

Circuit R24 R R25 is for Measure

6 Evaluation Board Schematic

Figure 2. Evaluation board

Figure 3. LIN part

AN 043

6/9



7 Evaluation Board Assembly

SJ4 INTN Pull-Up enabled if closed

CAN Connector

LIN4 Connector

1 2 3 4

1 2 3 4

LIN

3 C

onne

ctor

LIN

2 C

onne

ctor

LIN1 Connector

12V DCInput

MD

RV

JP13

EN_FSON_LEDclosed=enabled

JP10 SWDM enabled if closed

JP16 deliver

RSTN to MCU

Board if enabled

JP7 INTN externally

pulled-up if closed

JP1 & JP5CMC Choke

Bypass

JP2 & JP6CAN

Termination

CON1/2 LIN RXD Source

RXDLINx_IC

RXDx (decentral)

RXD (central)TXDLINx_IC

TXDx (decentral)

JP14 LIN3 Termination1-2=Slave

2-3=Master

CON3/4 LIN TXD Source

JP12 CAN Supply 1-2=VDD1

2-3=VDD2

TXD (central)


2-3=Master


2-3=Master

RXDCAN_IC

RXDCAN

TXDCAN_IC

TXDCANSJ5 Step-Upopen=disabledclosed=enabled

JP9 EN_VDD21-2=enabled

open=Disabled

SJ3 Step-Upopen=enabledclosed=disabled

JP3 not in use

JP8 LIN1 Termination1-2= Slave

2-3= Master

JP17 enable supply for LIN pull-ups

GN

D

CSN

SCK

SDO

SDI

RST

NIN

TNGN

DM

DR

VTX

DC

AN

_IC

RXD

CA

N_I

C

RXD

LIN

4_IC

TXD

LIN

4_IC

TXD

LIN

3_IC

TXD

LIN

1_IC

RXD

LIN

3_IC

RXD

LIN

2_IC

RXD

LIN

1_IC

TXD

LIN

2_ICW

K

GN

D

Figure 4. Top side

Figure 5. Bottom side

7/9

AN 043



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)

Connectors legendCON1 – test and communication port

Pin Legend

1 VBAT – input voltage in 12V automotive range

2 Ground

AK1 – Power Supply

X31 – Demo

Documented in future revision.

AN 043

8/9



8 Parts ListUsed Pos.-Nr. Value Order-Nr. Supplier Remark Manufacturer

1 AK1 AK130/02 ARK130/2 Schukat PTR Messtechnik4 C1, C5, C6, C23 100n/50V 399-1170-1-ND Digikey 0805 Kemet4 C10, C21, C26, C29 330pF/50V CCPF330K0805 Digikey 08053 C11, C13, C15 33n/16V 311-1374-1-ND Digikey 0805 Kemet1 C14 22µF/6.3V PCE4510CT-ND Digikey 4,3mm x 4,3mm Panasonic1 C18 22n/50V 1414682 Farnell 0805 Kemet1 C2 4.7nF/50V 709-1194-6-ND Digikey 0805 Kemet1 C3 22µF/50V 338-2741-1-ND Digikey 6,6mm x 6,6mm CDE1 C4 100µF/50V VF 100/50 K-F Reichelt 6,3mm x 6,3mm Nichicon3 C7, C12, C22 10µF/10V 493-3682-1-ND Digikey 4,3mm x 4,3mm Nichicon4 C8, C19, C24, C27 220p/50V CCPF220K0603 Schukat 06034 C9, C20, C25, C28 22pF/50V 399-1053-1-ND Digikey 0603 Kemet5 CAN, LIN1, LIN2, LIN3, LIN4 F09H D-SUB BU 09EU Reichelt D-SUB 9 female TH5 CON1, CON2, CON3, CON4, CON5 X04R MPE 087-2-004 Reichelt 2x2 pin header MPE Garry1 D1 PMEG6030EP 568-6530-1-ND Digikey SOD128 NXP2 D2, D5 MUH1PB 2098037 Farnell MicroSMP Vishay4 D3, D6, D8, D10 TS4148 8150206 Farnell 08054 D4, D7, D9, D11 PESD1LIN 568-4033-1-ND Digikey SOD323 NXP1 IC1 24LC64 AT24C64D-SSHM-TCT-ND Digikey SO8 Atmel1 IC2 521.14 E521.14 ELMOS QFN44L7 ELMOS

10 JP1, JP2,JP5, JP6, JP7, JP9, JP10, JP13, JP16, JP17 JP1E MPE 087-1-002 Reichelt broken pin header SIL MPE Garry1 JP3 JP2E MPE 087-1-003) Reichelt broken pin header SIL MPE Garry1 JP4 PINHD-2X11_2.54 SL 2X50G 2,54 (broken) Reichelt broken MPE Garry5 JP8, JP11, JP12, JP14, JP15 JP2E MPE 087-1-003) Reichelt broken pin header SIL MPE Garry1 L1 B82789C104N B82789C104N2-ND Digikey Würth1 L2 LPS6225-222 LPS6225-222 Coilcraft direct call Coilcraft1 L3 LPS6225-333 LPS6225-333 Coilcraft direct call Coilcraft1 LED1 Failsafe SMD-LED 0805 RT Reichelt OSRAM1 Q1 FDS5680 FDS5680CT-ND Digikey Fairchild5 R1, R9, R28, R32, R37 10k0 RL0603K010-1 Schukat 06032 R10, R61 0R0 RMCF0805ZT0R00CT-ND Digikey 0805 Stackpole8 R11, R14, R34, R35, R40, R42, R52, R54 2k0 RL0805K002.0-1 Schukat 08051 R16 3R3 RP16S3.3FCT-ND Digikey 06032 R2, R3 62R0 P62.0CCT-ND Digikey 08052 R23, R62 R062 RHM.062RCT-ND Digikey 1206 Rohm1 R24 33k0 1469801 Farnell 06032 R25, R45 56k0 RMCF0603JT56K0CT-ND Digikey 0603 Stackpole8 R33, R41, R43, R44, R55, R56, R58, R59 30k0 715623 Farnell 06031 R36 22k P22.0KHCT-ND Digikey 0603 Panasonic1 R38 4k7 P4.7KHCT-ND Digikey 0805 Panasonic1 R39 620R 541-620ACT-ND Digikey 0805 Vishay Dale8 R4, R19, R26, R27, R29, R30, R31, R57 1k0 P1.00KHCT-ND Digikey 0603 Panasonic

18 330R RMCF0603JT330RCT-ND Digikey 0603 Stackpole1 R53 0R0 CR0603E000 Schukat 06031 R60 0R0 RMCF1206ZT0R00CT-ND Digikey 1206 Stackpole1 SW1 TL37PO TL37PO Reichelt5 T1, T2, T4, T5, T6 MUN5313 MUN5313DW1T1GOSCT-ND Digikey SOT363 ON Semi1 T3 BC847 BC847B-7FDICT-ND Digikey BC846 SOT23 Diodes1 X31 FABC96R DIN-096RSC-SR1-HM-ND Digikey female 3M

R5, R6, R7, R8, R12, R13, R15, R17, R18, R20, R21, R22, R46, R47, R48, R49, R50, R51

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.

AN 043E521.14 EVALUATION BOARDAPR 23, 2014

9/9

Elmos Semiconductor AG provide the E521.14 Evaluation board simply and solely for IC evaluation purposes in labo-ratory. The Kit or any part of the Kit must not be used for other purposes or within non laboratory environments. Es-pecially the use or the integration in production systems, appliances or other installations is prohibited.

Elmos Semiconductor AG shall not be liable for any damages arising out of defects resulting from (1) delivered hard-ware 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 mer-chantability 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.

Usage restrictions

Disclaimer

Documents

1 What you get 2 What you need in addition 3 Features ... · PDF file1 What you get 2 What you need in addition 1. Evaluation board 2. Board description (this document) Figure 1. Evaluation