NCV7430GEVB NCV7430 LIN RGB Driver Using Auto‐addressing and High Current Evaluation Board User's Manual http://onsemi.com Description EVAL BOARD USER’S MANUAL Recent customer requests have shown there is a need for an RGB lighting driver device to operate in a fashion to allow the system to assign an address after power-up to allow component changes after the initial system assembly as an option to pre-programming prior to assembly at the automotive manufacturer. The NCV7430 auto-addressing evaluation board uses an approach where the LIN communication bus is consecutively switched between modules after an address has been assigned. The target application for the NCV7430 LIN RGB BIAS pin is defined for use as a thermal distribution device, but can find a use here in providing the customer with a solution for auto-addressing of the system board attached on LIN bus. Additionally features to the board developed here allows for the demonstration of external drivers for higher current LEDs and testing of thermal compensation components as described in the NCV7430/D data sheet. Figure 1. Evaluation Board − Top View Features In addition to the NCV7430 part features, this evaluation board highlights the following: • Auto-addressing • Increased Output Current • Temperature Compensation The board shown in Figure 2 has the on-board LED on the bottom side of the board (U2). The external high current drivers (Q1, Q2, Q3) for external LED control are not populated. Details of schematic contents can be found in the upper-left portion of the schematic (see Figure 4). All boards are shipped with zero ohm resistors for D3, D4, and D5. These can be replaced by customer specific schottky diodes for thermal compensation. WARNING: This board should only be used for driving EITHER an external LED with the NJVMJD253T4G drivers or the on-board LRTB_G6TG LED. USB PC Figure 2. Evaluation Board − Bottom View Interface Connector USB2SPI Adapter Target Board Figure 3. Evaluation Board © Semiconductor Components Industries, LLC, 2013 August, 2013 − Rev. 1 1 Publication Order Number: EVBUM2198/D Figure 4. NCV7430 Full Evaluation Board Schematic http://onsemi.com 2 Master_in Slave_out TP5 GND R6 1.2 NJVMJD253T4G 1 2 3 4 J1 1 2 3 4 J2 LED External U2=Unpopulated Q1=Q2=Q3=Populated R6 thru R14 Populated D3=D4=D5=Unpopulated R1=R2=R3=R15=Unpopulated Q1 TP1 LEDH1 Temperature Compensation No Compensation D3=D4=D5=0 ohms R1=R2=R3=12 ohms R15=Unpopulated With Compensation D3=D4=D5=Diode Populated R1=R2=R3=9 ohms R15=30 ohms LED On−Board U2=Populated Q1=Q2=Q3=Unpopulated R6 thru R14 Unpopulated Options R7 10 RED R8 100 C3 10nF R9 1.2 NJVMJD253T4G MRA4003T3 D1 TP4 VBB Q2 TP2 LEDH2 C2 100nF R10 10 GREEN 100 R11 C1 100pF R12 1.2 NJVMJD253T4G Q3 TP3 LEDH3 NUP1105LT1G DN1 R13 10 BLUE 100 R14 1 2 3 4 5 6 7 U1 LED3C LED1C LED2C TST1 LED2R LED1R LED3R NCV7430 ANODE VBIAS VBB LIN GND TST2 GND 2n7002wt1g M2 R4 24k 14 13 12 11 10 9 8 D3 C4 220pF M1 1 2 3 ntr0202plt1g R B 6 5 4 R1 12 LRTB_G6TG G U2 R5 5.1k body diode R15 12 D4 mm3z20vt1g D2 R2 12 D5 R3 12 NCV7430GEVB http://onsemi.com 3 1 2 3 4 Slave_out J4 1 2 3 4 Figure 5. NCV7430 Auto Addressing Board Schematic with on board LED TP6 GND Master_in J3 C8 10nF MRA4003T3 D10 TP10 VBB C7 100nF C6 100pF DN2 NUP1105LT1G 1 2 3 4 5 6 7 LED3C LED1C LED2C TST1 LED2R LED1R LED3R 14 13 12 11 10 9 8 1 2 3 R 6 5 4 R28 12 LRTB_G6TG GB U4 R17 5.1k 0 ohms D7 C5 220pF 0 ohms D8 R29 12 D6 mm3z20vt1g 0 ohms D9 R30 12 Note − D3, D4, and D5 are populated with zero ohm resistors. NCV7430 ANODE VBIAS VBB LIN GND TST2 GND U3 2n7002wt1g M4 R16 24k M3 ntr0202plt1g body diode NCV7430GEVB 4 1 2 3 4 Slave_out J6 1 2 3 4 http://onsemi.com TP14 LEDH1 Figure 6. NCV7430 High Current Board Schematic for High Current External LED TP11 GND R34 1.2 Q7 NJVMJD253T4G Master_in J5 R35 10 RED 100 R36 C10 100pF R38 10 R40 1.2 R41 10 100 R42 BLUE TP13 LEDH3 DN3 NUP1105LT1G R37 Q9 R39 1.2 NJVMJD253T4G 100 GREEN TP12 LEDH2 C11 100nF Q8 NJVMJD253T4G C12 10nF MRA4003T3 D15 TP15 VBB 1 2 3 4 5 6 7 LED3C LED1C LED2C TST1 LED2R LED1R LED3R 14 13 12 11 10 9 8 C9 220pF R32 5.1k D11 mm3z20vt1g Note − D3, D4, and D5 are populated with zero ohm resistors. NCV7430 ANODE VBIAS VBB LIN GND TST2 GND U5 2n7002wt1g M6 R31 24k M5 ntr0202plt1g body diode NCV7430GEVB NCV7430GEVB Table 1. ABSOLUTE MAXIMUM RATINGS (The operation of the NCV7430 auto-addressing evaluation board works with the custom made ON Semiconductor USB2LIN board in combination with the custom GUI interface. No additional power supply is needed other than the supplied 12 V AC/DC adapter which powers the USB2LIN board through the RJ22 Connectors. An additional USB connector is used as the interface from the GUI to the USB2LIN board.) Rating Value Unit 45 (max) 12 (typ) V USB Digital Supply Voltage −0.3 to 5.5 V NCV7430 LIN Interface Connector Pins −45 to 45 V 2 A Main Supply Voltage to USB2LIN Board (AC/DC Adapter) 4 Wire RJ11 Connector VBB Supply Voltage (NCV7430) −0.3 to 43 V Junction Temperature (NCV7430) −40 to 125 °C Ambient Temperature (Evaluation Board) −40 to 105 °C Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect device reliability. Figure 7. USB2LIN Power Jack Table 2. RECOMMENDED OPERATING CONDITIONS Value Rating Min Max Unit External Digital Supply Voltage (VBB) 5.5 18 V USB Supply Voltage (VBAT) 4.5 5.5 V − 1 (Note 1) A −40 125 °C LED DC Output Current (with External LED using NJVMJD253T4G) Junction Temperature 1. Beta of the external driver at the specified operating temperature must be considered when operating at high currents in order to obtain the system design goals. Table 3. PIN FUNCTION DESCRIPTION Connector Pin Number Terminal Name Description Pin Connections (to be used with external LEDs only) 1 VBB ANODE connection for external LEDs. 2 Red Red external LED CATHODE connection. 3 Green 4 Blue Blue external LED CATHODE connection. Test Points 5 GND Ground Communication and Power J1 Master_in Connection input from USB2LIN or preceding board in the serial chain. J2 Slave_out Connection output to the next board in the serial chain. Green external LED CATHODE connection. http://onsemi.com 5 NCV7430GEVB THEORY OF OPERATION The auto-addressing feature of this evaluation board uses the NTR0202PLT1G PFET device as a switch between modules of the LIN bus. The board is configured such that the master device connection should be made to the Master-in node and the subsequent connection to the next sequential modules should be made from the Slave_out. Control of the switched node is directed by the ncv7430 device through the use of the VBIAS pin. VBIAS is low during the initial power-up of the module. The body diode of the switching transistor (NTR0202PLT1G) is sufficiently high impedance to impede communication further down the bus and orientated to provide reverse battery protection. After the 1st module has been assigned an address, the VBIAS pin goes high ultimately causing the switched transistor to turn on which allows the 2nd module to see the signal on the bus (through LIN Slave_out). System Setup Slave Device → (Module 1) [Master_in → Slave_out] → (Module 2) [Master_in → Slave_out] Body Diode LIN Master_in NTR0202PLT1G MM3Z20VT1G MRA4003T3 12 V + Vbat/ − AC/DC Converter 24 kW 5.1 kW 220 pF 2N7002WT1G NCV7430 VBIAS VBB LIN GND Figure 8. Auto-addressing Interface http://onsemi.com 6 LIN Slave_out NCV7430GEVB Figure 9. Operational Guidelines board to the Master_in of a second NCV7430 auto-addressing board. 5. Initiate the GUI. 6. The initial address for the NCV7430 device is AD0 (see Figure 10). 7. Move to the Node configuration tab. Select a new address from the green matrix. Program the new address. Lock the new address with LOCKBT1 (see Figure 11). 8. The new address is programmed (see Figure 12). 9. In the middle column click the box for Ballast. Click the Program OTP button. Click the Read OTP button. The BALLAST box should now be checked (see Figure 13). 10. Select the device (AD47) and turn the device on (see Figure 14). 11. Select the Network configuration tab. Click the Scan network button. The new board in the daisy chain should appear (AD0). (see Figure 15) The material necessary to successfully use the evaluation boards is listed below: • PC Running the Latest ON Semiconductor USB2LIN GUI • USB Cables Type A to Type B • Interface Cables with 4 Wire RJ22 Connectors • USB2LIN Interface Board • NCV7430 Evaluation Board • AC/DC 12 V Power Supply At least 2 of the NCV7430 auto-addressing evaluation boards will be needed to demonstrate the auto-addressing feature. 1. Connect the USB cable to the computer which has the USB2LIN GUI installed and to the USB2LIN Interface Board. 2. Connect the AC/DC Power Supply to the USB2LIN Interface Board. 3. Connect the RJ22 connector from the USB2LIN Interface Board to the Master_in on the NCV7430 auto-addressing board. 4. Connect another RJ22 connector from the Slave-out of the 1st NCV7430 auto-addressing Repeat the process for each additional board which requires a unique address. http://onsemi.com 7 NCV7430GEVB Figure 10. The Initial Address Figure 11. Lock the New Address with LOCKBT1 Figure 12. The New Address is Programmed Figure 13. The BALLAST Box is Checked Figure 14. Select AD47 and Turn Device On Figure 15. The New Board in the Daisy Chain Should Appear http://onsemi.com 8 NCV7430GEVB Increasing the LED Operating Current The NCV7430 device can be used as a control IC to drive an external transistor thereby resulting in a higher LED drive current. LED run current is limited to 32 mA/channel on the device. By using this current as a drive current as shown in Figure 16, the current can be increased to 32 mA times the beta of the external bipolar transistor. Additionally, the three outputs can be connected in parallel to provide a single current source which is three times the single drive capability (Reference Figure 18). Current is programmed by the 325 mV (typ) voltage on the LEDxR pin divided by the resistor value (R3). TP4, VBB TPx, LEDHx Figure 17. High Current Operation Temperature Compensation VBB ANODE R1 LEDxC D3, D4, and D5 which are normally provided here as zero ohm resistors (reference schematic Figure 5, and board bottom graphic Figure 21) can be replaced by schottky diode transistors to provide compensation for thermal effects of the LEDs. A footprint for each channel is provided with an additional footprint (R15 connected from LED1R to ground) to provide placement for an additional resistor for better compensation of red LEDs. Reference the NCV7430/D datasheet for further details. An ON Semiconductor MBR0520LT1G schottky diode has been shown to provide temperature compensation for red LEDs. But choice of the schottky diode components is highly dependent on the LEDs designed into the system and placement on the PC board relative to the LED. NJVMJD253T4G External LED 100 W NCV7430 R2 LEDxR 10 W GND R3 1.2 W Figure 16. Higher Current Schematic TP4, VBB External LED TP1, LEDH1 VBB TP2, LEDH2 TP3, LEDH3 ANODE LED1C NCV7430 LED2C LED3C LED3R LED2R LED1R GND R8 NJVMJD253T4G 100 W R11 NJVMJD253T4G 100 W R14 NJVMJD253T4G 100 W R13, 10 W R10, 10 W R7, 10 W R6 1.2 W R9 1.2 W Figure 18. Parallel Connections http://onsemi.com 9 R12 1.2 W NCV7430GEVB EVALUATION BOARD LAYOUT Figure 19. Silk Screen and Drill Holes Figure 20. Copper − Top View Figure 21. Copper − Bottom View Figure 22. Board Composite http://onsemi.com 10 NCV7430GEVB Table 4. NCV7430 AUTO-ADDRESSING EVB WITH ON−BOARD LED BILL OF MATERIALS Designator Qty. Description Value Tolerance U1 1 NCV7430 SOIC−14 − − U2 1 RGB LED C1 1 50 V LIN Filter Capacitor C2 1 C3 Footprint Manufacturer Manufacturet Part Number Substitution Allowed ON Semiconductor NCV7430D20G No − LRTB_G6TG OSRAM LRTB G6TG LRTB G6SF Yes 100 pF ±5% 0603 Murata GCM1885C1H101JA16D Yes 50 V VBB Filter Capacitor 100 nF ±10% 0603 Murata GCM188R71H104KA57D Yes 1 50 V VBAT Filter Capacitor 10 nF ±10% 0603 Murata GCM188R71H103KA37D Yes C4 1 50 V Auto-address Switch Capacitor 220 pF ±5% 0603 Murata GCM1885C1H221JA16D Yes D1 1 Reverse Battery Diode − SMA_DIODE ON Semiconductor MRA4003T3 Yes D2 1 FET Protection Diode − SOD_323 ON Semiconductor MM3Z20VT1G Yes ON Semiconductor NUP1105LT1G Yes 87180_044LF Yes NTR0202PLT1G No DN1 1 LIN Bus Protector − SOT23 J1, J2 2 RJ22 Right Angle Socket − FCI_87180_044LF M1 1 Auto-address Switch − ntr0202plt1g ON Semiconductor M2 1 Driver Switch R1, R2, R3, R15 4 LED Current Programming Resistors − 2n7002wt1g ON Semiconductor 2N7002WT1G Yes 12 W ±1% 0603 Vishay Dale CRCW060312R0FKEA Yes R4 1 R5 1 Pull-up Resistor 24 kW ±1% 0603 Vishay Dale CRCW060324K0FKEA Yes FET Drive Resistor 5.1 kW ±1% 0603 Vishay Dale CRCW06035K10FKEA Yes TP1, TP2, TP3, TP4 4 High Current Connection − Turret Mill Max 2501−2−00−44−00−00−07−0 Yes D3, D4, D5 3 Jumper Jumper SOD_123 Vishay Dale CRCW08050000Z0EA Yes 0W http://onsemi.com 11 NCV7430GEVB Table 5. NCV7430 HIGH CURRENT EVB BILL OF MATERIALS Manufacturer Manufacturet Part Number Substitution Allowed ON Semiconductor NCV7430D20G No 0603 Murata GCM1885C1H101JA16D Yes ±10% 0603 Murata GCM188R71H104KA57D Yes 10 nF ±10% 0603 Murata GCM188R71H103KA37D Yes 220 pF ±5% 0603 Murata GCM1885C1H221JA16D Yes Reverse Battery Diode − SMA_DIODE ON Semiconductor MRA4003T3 Yes 1 FET Protection Diode − SOD_323 ON Semiconductor MM3Z20VT1G Yes ON Semiconductor NUP1105LT1G Yes 87180_044LF Yes NTR0202PLT1G No Designator Qty. Description Value Tolerance U1 1 NCV7430 SOIC−14 − − C1 1 50 V LIN Filter Capacitor 100 pF ±5% C2 1 50 V VBB Filter Capacitor 100 nF C3 1 50 V VBAT Filter Capacitor C4 1 50 V Auto-address Switch Capacitor D1 1 D2 Footprint DN1 1 LIN Bus Protector − SOT23 J1, J2 2 RJ22 Right Angle Socket − FCI_87180_044LF M1 1 Auto-address Switch − ntr0202plt1g ON Semiconductor M2 1 Driver Switch − 2n7002wt1g ON Semiconductor 2N7002WT1G Yes Q1, Q2, Q3 3 High LED Current Driver − NJVMJD253T4G ON Semiconductor NJVMJD253T4G No R4 1 Pull-up Resistor 24 kW ±1% 0603 Vishay Dale CRCW060324K0FKEA Yes R5 1 FET Drive Resistor 5.1 kW ±1% 0603 Vishay Dale CRCW06035K10FKEA Yes R6, R9, R12 3 High Current Program Resistor 1.2 W ±1% 0805 Vishay Dale CRCW08051R20FKEA Yes R7, R10, R13 3 High Current Feedback Resistor 10 W ±1% 0603 Vishay Dale CRCW060310R0FKEA Yes R8, R11, R14 3 PNP Drive Resistor 100 W ±1% 0603 Vishay Dale CRCW0603100RFKEA Yes TP1, TP2, TP3, TP4 4 High Current Connection − Turret Mill Max 2501−2−00−44−00−00−07−0 Yes ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). 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