EVBUM2044 - NCV7420 LIN Transceiver with Voltage
Contents
1. 9855 Toll Free ON Semiconductor Website www onsemi com Literature Distribution Center for ON Semiconductor USA Canada P O Box 5163 Denver Colorado 80217 USA Europe Middle East and Africa Technical Support Order Literature http www onsemi com orderlit Phone 303 675 2175 or 800 344 3860 Toll Free USA Canada Phone 421 33 790 2910 Fax 303 675 2176 or 800 344 3867 Toll Free USA Canada Japan Customer Focus Center For additional information please contact your local Email orderlit onsemi com Phone 81 3 5817 1050 Sales Representative www BDTIC com ON m2. Ll VHB 1 q i lt 1 WEL Tr IN Ni Ni a ain 3 GAD H GNDI TxD P TPA WAKE CHO Deiml 1 GND GND TP INE an Ree a 5 r 5 P GND Fermite ia 05045 6 ce a i PE En sa e L OTP SUP TEST g IFS SIH I On ALAS TER i 4 9 GND ri 220pF SLAVE 10 TP IE NO TE IFI RAL CoML CoML GND TE TPI2 NGU DM CT no assembled try default 5 GND GND HEADER 1X12 e WARI 13 SOOPROND ARE I d k i SI imi a SMD SWITCH GND GND GND GND Figure 7 NCV7420 LIN Transceiver with Voltage Regulator Evaluation Board Schematic Bill of Materials Table 2 NCV7420 Evaluation Board Bill of Materials i ae Manufacturer Part Designator Description value Footprint Manuacturer Mondine Part Capacitor SMD CAP0805 PHYCOMP 2238 580 15623 R1 R2 Resistor SMD ee a R1206 WELWYN WCR 1206 2K 2 7 cs cs z a ca gt 7 Resistor SMD L1 Optional Ferrite OORO R0805 MULTICOMP MC 0 1W 0805 OR SIL HEADER 12 Pins J1 Right Angle HEADER 1X12 HDR1x12 MOLEX 90121 0772 D2 D3 Switching Diode SMD MMSD4148 SOD123 ON Semiconductor MMSD4148T1G LIN Transceiver with 3 3 V 3 3 V NCV7420D24R2G U1 or 5 V Voltage Regulator NCV7420 SOIC14 ON Semiconductor 5 V NCV7420D26R2G SCOPEGND SCOPEGND Wire Bridge SCOPEGND SCOPEGND SWITCH SMD SPNO TYCO SWI ia SMD SWITCH PB300 ELECTRONICS FSM2JSMA FT1 FT2 FT3 FEET TP1 TP2 TPA TP5 TP7 TPS Testpin 200 SER TP 200
3. H1 0 TP10 TP11 Hole 1 0 Black BLACK TESTPIN2 VERO 20 2137 TP12 www BD t ctom ON NCV7420EVB PCB Drawings Assembly Drawings NCU7420 EUB amme SOICI4 Ul 0 1260 mil Hee a Figure 8 NCV7420EVB PCB Top Assembly Drawing Composite Drawings 1280 mil Fok I ac Figure 10 NCV7420EVB PCB Top Composite Drawing PCB Preview e 1280 nil 1280 mil gt eT4 IT4 eee E Figure 9 NCV7420EVB PCB Bottom Assembly Drawing 900 00 ele mele SS ZAH KAKAK NA Eba naban Figure 11 NCV7420EVB PCB Bottom Composite Drawing Mirrored NCU7420 EVB Cae SOICIi4 V1 0 Figure 12 NCV7420EVB PCB Top Side View SEERERERRERRESR SE YF Figure 13 NCV7420EVB PCB Bottom Side View www BDF t ctom ON NCV7420EVB References 1 On Semiconductor NCV7420 Product Preview Revision 0 5 July 2010 ON Semiconductor and WwW are registered trademarks of Semiconductor Components Industries LLC SCILLC SCILLC reserves the right to make changes without further notice to any products herein SCILLC makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does SCILLC assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation special consequential or incidental damages Typical parameters whi
4. NCV7420EVB NCV7420 LIN Transceiver with Voltage Regulator Evaluation Board User s Manual Introduction This document describes the NCV7420EVB board for the ON Semiconductor NCV7420 LIN Transceiver with Voltage Regulator The functionality and major parameters can be evaluated with the NCV7420EVB board The NCV7420 is a fully featured local interconnect network LIN transceiver designed to interface between a LIN protocol controller and the physical bus The NCV7420 LIN device is a member of the in vehicle networking IVN transceiver family of ON Semiconductor that integrates a LIN v2 1 physical transceiver and a low drop voltage regulator It is designed to work in harsh automotive environment and is submitted to the TS16949 qualification flow Evaluation Board Features One row Pin Header Connecting to all Circuit Signals Enables Easy Insertion of the Evaluation Board into a more Complex Application Setup The Header Can be Alternatively Assembled Either Perpendicular or Parallel with the Board Plane e Oscilloscope Test points on all Circuit Signals Reverse Protection and Decoupling on the Main Battery Supply Decoupling on VCC Regulator Output e Filtering Circuit on the Switch monitoring WAKE Input e On board Local Wakeup Switch LIN bus Termination and Optional ESD Protection ON Semiconductor http onsemi com EVAL BOARD USER S MANUAL NCV7420 Key Features LIN Bus Transceiver LIN Compl
5. ansition LIN transmitter gets on only after TxD returns to high after the state transition 3 The stand by mode is entered automatically after power up 4 In Stand by and Sleep mode the High state is achieved by internal pull up resistor to VCC Standby Mode Power up Vbb Voc of 7 Vee a LIN TX Off EN goes from 1 to 0 while STB 1 LIN TX On INH Floating INH High Floating Term Current Source Term 30 kQ RxD High Low RxD LIN Data 0 EN goes from 1 to 0 while STB 1 EN goes from 0 to 1 while TxD Normal Mode EN goes from 0 to 1 while TxD 1 Local Wake up or LIN Wake up Low Slope Vcc On Vcc Off B oe On EN goes from 1 to 0 while STB 0 E eae Off INH High Floating INH Floating Term 30 kQ Term Current Source RxD LIN Data RxD VCC Normal Mode Normal Slope 0 EN goes from1 to 0 while STB Sleep Mode PD20090610 01 Figure 6 NCV7420 State Diagram Additional details of the NCV7420 operation and parameters can be found in the corresponding datasheet 1 www BDTIf tom ON NCV7420EVB D1 yei gt MASTER only AIRAAGOS TS ecepabbe 12 oq D3 ta r I C4 cs hih 50 Leh lF OV X7R MMSD4 148 H GNO GND OoWD BATT E Maxina i pening olbige 26 4 Absohtte Maximum Voltage 454 i MASTER only UI T Tu 2x 2 0K 1206 0 2444 NCWT420 ia IP BATI ESD LIN
6. ch may be provided in SCILLC data sheets and or specifications can and do vary in different applications and actual performance may vary over time All operating parameters including Typicals must be validated for each customer application by customer s technical experts SCILLC does not convey any license under its patent rights nor the rights of others SCILLC products are not designed intended or authorized for use as components in systems intended for surgical implant into the body or other applications intended to support or sustain life or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application Buyer shall indemnify and hold SCILLC and its officers employees subsidiaries affiliates and distributors harmless against all claims costs damages and expenses and reasonable attorney fees arising out of directly or indirectly any claim of personal injury or death associated with such unintended or unauthorized use even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part SCILLC is an Equal Opportunity Affirmative Action Employer This literature is subject to all applicable copyright laws and is not for resale in any manner PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT N American Technical Support 800 282
7. he LIN transmitter LIN receiver voltage regulator power on reset POR circuits and thermal shutdown TSD The LIN transmitter is optimized for the maximum specified transmission speed of 20 kBaud with EMC performance due to reduced slew rate of the LIN output Table 1 MODE SELECTION The junction temperature is monitored via a thermal shutdown circuit that switches the LIN transmitter and voltage regulator off when temperature exceeds the TSD trigger level NCV7420 has four operating states normal mode low slope mode stand by mode and sleep mode that are determined by the input signals EN WAKE STB and TxD Operating States NCV7420 provides four operating states two modes for normal operation with communication one stand by without communication and one low power mode with very low current consumption see Figure 6 and Table 1 Normal Slope Note 1 Stand by Note 3 ON ON Low Dominant State High if STB High during state Normal Slope High Recessive State transition Floating otherwise Normal Low Slope ON Low Dominant State High if STB High during state Low Slope ON Note 2 High Recessive State transition Floating otherwise Low after LIN wakeup high Floating OFF otherwise Note 4 FF 1 The normal slope mode is entered when pin EN goes HIGH while TxD is in HIGH state during EN transition 2 The low slope mode is entered when pin EN goes HIGH while TxD is in LOW state during EN tr
8. iant to Specification Revision 2 1 Backward Compatible to Versions 2 0 and 1 3 and SAE J2602 Bus Voltage 45 V Transmission Rate up to 20 kBaud Integrated Slope Control for Improved EMI Compatibility e Protection Thermal Shutdown Indefinite Short circuit Protection on Pins LIN and WAKE Towards Supply and Ground Load Dump Protection 45 V Bus Pins Protected against Transients in an Automotive Environment ESD Protection Level for LIN INH WAKE and Vbb up to 12 kV e Voltage Regulator Two Device Versions Output Voltage 3 3 V or 5 V for Loads up to 50 mA e Over current Limitation INH Output for Auxiliary Purposes Switching of an External Pull up or Resistive Divider Towards Battery Control of an External Voltage Regulator etc Typical Applications e Automotive Industrial Network Semiconductor Compon i 1 blcation Order Number November 2011 WWW e CO IN EVBUM2044 D NCV7420EVB SCOPEGND NCU7420 EUB Ggumrmme SOICI4 V1 0 Figure 1 NCV7420EVB Getting Started Master Slave Configuration The NCV7420 evaluation board can be configured as Master or Slave node Furthermore Master node LIN bus pull up resistance RN can be tied to VBB supply line or to INH pin See the figures below VBB VBB VBB INH NCV7420 Ruin RLIN LIN Bus LIN Bus LIN CLIN T Figure 2 Master with Pull up to VBB Basic Connection A simple LIN network configuration is shown in the fig
9. ure below One Master and one Slave node is required Master Slave Configuration VBAT LIN GND MASTER Node 6 1 2010 s R4 a QR Semiconductor MASTER _ VCC NCV7420 EVB SOICI4 V1 0 CLIN T Figure 3 Master with Pull up to INH NCV7420 PIN CONNECTIONS VBB LIN GND g q GND X O WAKE Z INH OTP_ZAP SOIC 14 D SUFFIX CASE 751AP The EMC immunity of the Master node device can be further enhanced by adding a capacitor between the LIN output and ground C The optimum value of this capacitor is determined by the length and capacitance of the LIN bus the number and capacitance of Slave devices the pull up resistance of all devices Master and Slave and the required time constant of the system VBB VBB VBB INH INH NCV7420 NCV7420 LIN Bus LIN LIN ANT Figure 4 Slave Configuration d SLAVE Node parr gt gt L e O O HO O 0 Cc yoy CC 1 28 TT TT TTs r 4 gt z SCOPEGND JCC NCU7420 EVB Gg SOICI4 V1 0 Figure 5 NCV7420 Evaluation Setup Connection www BD Ptl ctom ON NCV7420EVB Functional Description Overall Functional Description NCV7420 is designed as a master or slave node for the LIN communication interface with an integrated 3 3 V or 5 V voltage regulator having a current capability up to S50mA for supplying any external components microcontroller NCV7420 contains t
Download Pdf Manuals
Related Search