AN2443 Application note PLC actuator high-side driver solution with CMOS interface based on VN808CM-E High-side Driver Main Features ■ 8 output channels (8 x 0.7A) ■ 1 feedback channel - diagnostic ■ CMOS compatible signals allow direct connection to a microcontroller ■ Outputs + Diagnostic indicated by LEDs ■ EMC Immunity Proof ± 4kV level EFT (IEC 61000-4-4), ± 2kV Voltage Surge (IEC 610004-5) ■ Compatible with existing ST tools (CANIC10, ARMIC30 …) ■ 10.5 ÷ 33V DC Supply Voltage range Introduction This application note describes the STEVAL-IFP001V1 hardware implementation. It focus on PCB design which is critical for EMC immunity robustness and thermal management. The VN808CM-E is a monolithic device designed in STMicroelectronics VIPower M0-3 technology. The product is intended for driving any kind of load with one side connected to ground. It can be driven by using a 5.0V or 3.3V logic supply. This allows realizing an output stage without optical decoupling or another level-shifting. Active current limitation, combined with thermal shutdown and automatic restart, protect the device against accidental or longtime short circuit and overload. The complete solution is implemented on a double-face board with only two copper layers which is cost-effective, also precision of routing is cost-optimized. STEVAL-IFP001V1 is delivered in a set with CD-ROM including board fabrication data (Gerber files), this user manual and related devices documentation (for latest information, please have a look at www.st.com). December 2006 Rev 2 1/15 www.st.com Contents AN2443 Contents 1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 3 Connection description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4 Thermal management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 5 EMC Immunity testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 6 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 7 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Appendix A Bill of materials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Appendix B PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 2/15 AN2443 List of tables List of tables Table 1. Table 2. Table 3. Table 4. Table 5. Connectors JP1 and JP2 signal assignments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 EMC Immunity standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 STEVAL-IFP001V1 technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 List of components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 3/15 List of figures AN2443 List of figures Figure 1. Figure 2. Figure 3. Figure 4. Figure 5. Figure 6. Figure 7. Figure 8. Figure 9. Figure 10. Figure 11. 4/15 STEVAL-IFP001V1 application - top view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 STEVAL-IFP001V1 application - bottom view . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 JP1 connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 JP2 connector pinout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Reverse polarity protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Application schematic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Thermal vias placement suggestion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 PCB - top layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PCB - bottom layer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 PCB - silk screen top . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 PCB - silk screen bottom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 AN2443 1 Overview Overview Application is built on double-face, FR4 substrate, printed circuit board with 35µm copper plating. PCB dimensions are 94 mm x 74 mm. Figure 1. STEVAL-IFP001V1 application - top view Figure 2. STEVAL-IFP001V1 application - bottom view 5/15 Connectors 2 AN2443 Connectors The application uses two input connectors, one output and one supply voltage terminal. Both input connectors (JP1 and JP2) provide the same signals, the difference is in type and pinout. The location of connector JP1 ensures better compatibility with existing tools (primarily used for motor control). 6/15 Figure 3. JP1 connector pinout Figure 4. JP2 connector pinout Table 1. Connectors JP1 and JP2 signal assignments JP1 pin number JP2 pin number Signal Type 2 3 Status Output 4 4 Input 8 Input 10 5 Input 7 Input 14 6 Input 6 Input 20 7 Input 5 Input 22 8 Input 4 Input 23 2 GND Ground - reference 26 9 Input 3 Input 28 10 Input 2 Input 32 11 Input 1 Input AN2443 3 Connection description Connection description The application is connected as shown in Figure 6. It is not intended for a standalone operation and a control unit is necessary to provide the input signals. The control unit can be connected either to connector JP1 or JP2. Resistors R1 to R9 protect the control unit and prevent latch-up. Their value can be extended up to approximately 10kW depending on the application requirements. Output states of the VN808CM-E device are monitored by LEDs DS2 to DS9. DS1 is used for diagnostic purposes. The STATUS pin of the VN808CM-E with its open source structure provides typically 3mA current in case of over-temperature conditions. GND of the device is typically connected by jumper W1. To ensure the reverse polarity protection, replace this jumper by a parallel combination of a resistor (e.g. 1kW) and diode (universal or schottky) as shown in Figure 5. Output capacitors C1 to C8 improve application EMC immunity robustness, especially for compliance with standard 61000-4-6 - Immunity to conducted disturbances. Figure 5. Reverse polarity protection VCC IN1 OUT1 IN2 OUT2 IN3 OUT3 IN4 VN808CM-E OUT4 IN5 OUT5 IN6 OUT6 IN7 OUT7 IN8 OUT8 STATUS VGND D1 R2 (1kΩ) 0V ai13630 7/15 Connection description Figure 6. 8/15 AN2443 Application schematic diagram AN2443 4 Thermal management Thermal management The PCB includes a 14 x 53mm heatsink on both the top and bottom layers. Both heatsinks are thermally interconnected with vias. Another via grid is placed directly under the device exposed pad. This grid creates a low-resistive thermal connection of the device thermal slug to the bottom copper layer. Via drill holes should be approximately 0.3mm in diameter and the orthogonal grid approximately 1.2mm as shown in Figure 7. Figure 7. 5 Thermal vias placement suggestion EMC Immunity testing The application was tested according to electromagnetic compatibility (EMC) immunity standards IEC61000-4-4 (Fast Transient Burst) and IEC61000-4-5 (High Energy Surge). The Fast Transient Burst test lasted approximately 1 minute with ±4 kV and a repetition rate of 5 kHz. All channels were in Switching mode with a frequency of approximately 1Hz. The burst signal was applied using a capacitive coupling clamp tool. The High Energy Surge test was performed only in Differential mode (no protective GND available). The signal was coupled by a 42Ω impedance. The test contained five positive and five negative discharges. The repetition rate was 1 discharge per minute. The application worked properly during and after the tests. Table 2 shows the test results. Table 2. EMC Immunity standards Applied to/ Standard IEC61000-4-4 IEC61000-4-5 (Differential Mode) Supply voltage lines ± 4kV Criteria A ± 2kV Criteria A Output port ± 4kV Criteria A ± 2kV Criteria A Application note AN2208 (see Section 7: Reference documents) provides specific information about test setups. 9/15 Technical data 6 AN2443 Technical data Table 3. STEVAL-IFP001V1 technical data(1) Parameter Board Supply Voltage range (recommended) Min. Typ. 10.5 Output current per channel (nominal value) Max. Unit 33 V DC 0.5 Output low level voltage A DC 3 Supply leakage current @ 24VDC, all inputs grounded 88 V DC µA DC Input signal low level voltage 0 1.25 V DC Input signal high level voltage 2.25 6 V DC 1. These values are for information only. 7 10/15 Reference documents [1] AN1351 - VIPower AND BCDmultipower: Making Life Easier with ST’s High-side Drivers [2] AN2208 - Designing Industrial Applications with VN808/VN340SP High-side Drivers AN2443 Bill of materials Appendix A Bill of materials Table 4. Quantity List of components Reference Part Description Capacitors 8 C1-C8 10nF Ceramic capacitor SMD size 0805, 50V 1 C11 100nF Ceramic capacitor SMD size 0805, 50V 1 C13 22uF Electrolytic capacitor 22uF/50V, SMD +/-20% 1 D1 SM15T33A Transil diode, 33V 9 DS1-DS9 LED 1206 LED SMD size 1206, green color Diodes Mechanical parts 1 JP1 MLW34G 34-pin header - dual in line with lock 2.54x2.54mm pitch 1 JP2 MLW14G 14-pin header - dual in line with lock 2.54x2.54mm pitch 4 JP3 ARK508 – 2P 4 x terminal block 5.08mm pitch 1 JP4 ARK508 – 2P 1 x terminal block 5.08mm pitch 1 W1 Jumper 2-pin header 2.54mm pitch 9 R1-R9 470R Resistor, SMD size 0805, 150V/300V, 0.125W, 5% 1 R18 1k5 Resistor, SMD size 0805, 150V/300V, 0.125W, 5% 8 R19-R26 4k7 Resistor, SMD size 0805, 150V/300V, 0.125W, 5% U1 VN808CM-E STMicroelectronics, VN808CM-E, Octal high side driver Resistors ICs 1 11/15 PCB layout AN2443 Appendix B 12/15 PCB layout Figure 8. PCB - top layer Figure 9. PCB - bottom layer AN2443 PCB layout Figure 10. PCB - silk screen top Figure 11. PCB - silk screen bottom 13/15 Revision history AN2443 Revision history Table 5. 14/15 Document revision history Date Revision Changes 05-Dec-2006 1 Initial release. 14-Dec-2006 2 Figure 5: Reverse polarity protection updated. AN2443 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale. Purchasers are solely responsible for the choice, selection and use of the ST products and services described herein, and ST assumes no liability whatsoever relating to the choice, selection or use of the ST products and services described herein. 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