February 2010 Application Note AN-EVAL 2x8-ISO1H815G-1 Coreless Transformer Isolated High Side Switch Evaluation Board 2 x 8 Channel 1.2A with ISO1H815G Published by Infineon Technologies AG http://www.infineon.com Power Management & Drives N e v e r s t o p t h i n k i n g 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Table of Contents Table of Contents .....................................................................2 Introduction...............................................................................3 Board Characteristics ..............................................................4 Functional Description ............................................................5 Connectors................................................................................8 Schematic..................................................................................9 PCB Layout and Assembly....................................................11 Bill of Material .........................................................................12 References ..............................................................................13 www.Infineon.com Page 2 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Introduction Application This Application Note describes a Demoboard with an isolated 2 x 8 Channel 1.2A Digital Output. The ® board is designed to show the performance of the ISOFACE Part ISO1H815G providing an Isolated Interface output to drive resistive, capacitive or inductive loads directly. The input can be driven by applying 3.3V/5V CMOS compatible signals to connector K3 or using the On-Board DIP switches S1 and S2. The input operates in Micro Controller Mode by using Chip Select and Write Signals or in Direct Control Mode by pulling these signals to GND and setting the Data Input D0 to D7. The Output consists of 2 times 8 Channel High Side Switches with 1.2A Current rating. The Output is protected with a channel selected over-temperature switch (to off). Typical Application ISO1H815G The ISO1H815G is a galvanic isolated 8-bit data interface in P-DSO-36 package that provides 8 fully protected high-side power switches that are able to handle currents up to 1.2A. An 8-bit parallel microcontroller (µC) compatible interface allows connecting the IC directly to a µC system. The input interface also supports a direct control mode and is designed to operate with 3.3V/5V CMOS compatible levels. The data transfer from input to output side is realized by the integrated Coreless Transformer Technology. The ISOface™ ISO1H815G includes 8 high-side power switches that are controlled by means of the integrated parallel interface. The interface is 8-bit µC compatible. Furthermore, a direct control mode can be selected that allows the direct control of the outputs OUT0...OUT7 by means of the inputs ® D0...D7 without any additional logic signal. The ISOFACE can replace 8 optocouplers and the 8 highside switches in conventional I/O-Applications as galvanic isolation is implemented by means of the integrated coreless transformer technology. The µC compatible interface allows a direct connection to the ports of a microcontroller without the need for other components. Each of the 8 high-side power switches is protected against short to Vbb, overload, over-temperature and against over-voltage by an active zener clamp. www.Infineon.com Page 3 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G The diagnostic logic on the power chip recognizes the over-temperature information of each power transistor. That information is sent via the internal coreless transformer to the pin DIAG at the input interface. Figure 1– EVAL 2x8-ISO1H815G Board Characteristics Parameter Min. Max Unit 3.0 5.5 V K4 Jumper 1-2 8 12 V K4 Jumper 2-3 11 45 V -0.3 0.3xVCC V low level 0.7xVCC VCC+0.3V V high level Output Current Limit 1.4 4.5 A Output Clamping Voltage 47 60 V www.Infineon.com Page 4 from 14 VCC Input Voltage VBB Input Voltage Input Signals Remarks EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Functional Description Power Supply The Demo Board contains 2 galvanic isolated voltage domains that are independent from each other. The input interface is supplied by Pin1 and Pin14 of K3. Jumper K4 selects either direct supply with 3.3V/5V VCC (Jumper 1-2) or using the on-board 5V voltage regulator (Jumper 2-3). The output stage is supplied at pin1 and 10 of K2, and K2 with Vbb voltage. The different voltage domains can be switched on at different times. The output stage is only enabled once the input stage enters a stable state. Parallel Interface The ISO1H815G contains a parallel interface that can be directly controlled by the microcontroller output signals. The parallel interface can also be switched over to a direct control that allows direct changes of the outputs OUT0 ... OUT7 by means of the corresponding inputs D0 ... D7 on the Demo Board without additional logic signals. To activate the parallel direct control mode, both the /CS pin and /WR pin must be connected to ground. Direct Control Mode VCC VCC VCC CS WR P0 P1 P2 P3 P4 P5 P6 P7 On the Demo Board, this Mode can be easily operated by using the DIP Switches S1 and S2. GND Controller D0 D1 D2 D3 D4 D5 D6 D7 DIAG Parallel Interface Beside the use of the parallel µC compatible interface, a parallel direct control mode can be chosen. In this mode, the output OUT0...OUT7 can be directly controlled via the inputs D0...D7 without the need for additional logic signals. To activate this mode, pin CS and WR must be connected to ground. To activate the parallel direct control mode, both pins /CS and /WR must be connected to ground. Output lines GNDCC IC1 Truth Table for manual DIP-switch control: Input Direct Control Mode Output Disabled Output /DIS /WRx /CS Dn OUTn H L L H ON H L L L OFF L X X X OFF H = High Voltage Level; L = Low Voltage Level; X = Don’t Care; www.Infineon.com Page 5 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G µC Control Mode /CS - Chip select. The system microcontroller selects the ISO1H815G by means of the CS pin. Whenever the pin is in a logic low state, data can be transferred from the µC. /WR - Write. The system controller enables the write procedure in the ISO1H815G by means of the signal WR. A logic low state signal at pin WR writes the input data into the input latches when the CS pin is in a logic low state. D0…D7. The parallel input data is transferred to the input latches with a high-to-low transition of the signal /WR (write) while the /CS is logic low. Then a low-to-high transition of /CS transfers the data of the input latches to the output buffer. VCC VCC AD0 WR CS WR P0 P1 P2 P3 P4 P5 P6 P7 The µC Control Mode can be operated by connecting a Processor Board to the corresponding Signals of Connector K3. D0 D1 D2 D3 D4 D5 D6 D7 Parallel Interface VCC Output lines DIAG GND GNDCC µC (i.e C166) IC1 Truth Table for µC control: Input µC Control Mode Output Disabled Output /DIS /WR /CS Dn OUTn H ↑ ↑ H ON H ↑ ↑ L OFF L X X X OFF H = High Voltage Level; L = Low Voltage Level; X = Don’t Care; ↑ = positive slope Timing Diagram µC Control Mode: /CS /WR D0...D7 DATA Output OUT0...OUT7 ton/off www.Infineon.com Page 6 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Output Stage Each channel contains a high-side vertical power FET that is protected by embedded protection functions. The continuous current for each channel is 1.2A (all channels ON). Each output is independently controlled by an output latch and a common reset line via the pin /DIS that disables all eight outputs and reset the latches. A logic high input data bit turns the respective output channel ON. A logic low data bit turns that output channel OFF. Power Transistor Over-Voltage Protection Each of the eight output stages has it own zener clamp that causes a voltage limitation at the power transistor when inductive loads are switched off. VON is then clamped to 47V (min.). Inductive and over-voltage output clamp (each channel) Energy is stored in the load inductance. EL= 1 / 2 x L x IL² Inductive load switch-off energy dissipation (each channel) While demagnetizing the load inductance, the energy dissipation in the DMOS with an approximate solution for RL > 0 is: Power Transistor Over-current Protection The outputs are provided with a current limitation that enters a repetitive switched mode after an initial peak current has been exceeded. The initial peak short circuit current limit IL(SCp) is set to a minimum of 1.4A at Tj = 125°C. During the repetitive mode, short circuit current limit IL(SCr) is set to 2.2A (typ.). If this operation leads to an over-temperature condition, a second protection level (Tj > 135°C) will change the output into a low Pulse-Width Modulated duty cycle (selective thermal shutdown with restart) to prevent critical chip temperatures. Common Diagnostic Output The over-temperature detection information of the channels is OR-wired in the common diagnostic output block. The information is send via the integrated coreless transformer to the input interface. The output stage at pin DIAG has an open drain functionality combined with a current source. The red LED D20 and D21 show the current state of the DIAG output. LED ON: one of the Channels has over-temperature or the VBB Supply is below the operating range www.Infineon.com Page 7 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Connectors K1, K2: 1 2 3 4 5 6 7 8 9 10 K1 VBB1 OUT10 OUT11 OUT12 OUT13 OUT14 OUT15 OUT16 OUT17 GNDbb1 K2 VBB2 OUT20 OUT21 OUT22 OUT23 OUT24 OUT25 OUT26 OUT27 GNDbb2 K3: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 +Vin/VCC /DIS /CS /WR1 /WR2 D0 D1 D2 D3 D4 D5 D6 D7 GNDCC Note: When you are using connector K3 for applying Micro Controller Signals to the Board, make sure that all DIP Switches are in “High” state! K4: Jumper 1 - 2 Jumper 2 - 3 www.Infineon.com VCC 3,3V/5V Vin 8V …12V Page 8 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Schematic www.Infineon.com Page 9 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G www.Infineon.com Page 10 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G PCB Layout and Assembly Board Layout - Component Side Board Layout - Bottom Side (mirror view) www.Infineon.com Page 11 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Bill of Material Nr. Quant. 1 5 2 3 4 2 2 2 5 16 6 8 7 1 Position C1, C4, C6, C7, C8 C36, C37 C9, C10 C3, C35 C11, C12, C13, C14, C15, C16, C17, C18, C23, C24, C25, C26, C27, C28, C29, C30 C19, C20, C21, C22, C31, C32, C33, C34 C5 Value Package 100nF, 50V 0805 1uF, 50V 10uF, 50V 10uF, 10V 0805 SMD_E 0805 10nF, 50V 0805 4,7nF, 500V 1206 10uF, 25V SMD_B LED gn P-LCC-2 8 16 D1, D2, D3, D4, D5, D6, D7, D8, D9, D10, D11, D12, D13, D14, D15, D16 9 10 11 12 13 14 15 2 1 2 2 1 2 2 D20, D21 D17 D18, D19 F1, F2 IC1 IC2, IC3 K1, K2 LED rt LL4148 SM15T39A OMF125, 10A TLE4264 ISO1H815G Terminal 10pol. P-LCC-2 MM SMC SMD-D/E SOT-223 P-DSO36 RM5,08 16 1 K3 Connector 14pol. RM2,54 17 1 K4 Connector 3pol. RM2,54 18 16 R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16 10k 1206 19 20 21 22 23 24 25 26 27 2 2 1 1 1 1 1 4 1 4,7k 0R Winet 8x4,7k Winet 5x4,7k DIP-Switch 4 DIP-Switch 8 Jumper Spacer Print Board 1206 805 9-SIL-1 6-SIL-1 DSS-04 DSS-08 R17, R18 R20, R25 RN1 RN2 S1 S2 K4 www.Infineon.com Page 12 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G References [1] ISO1H815G Coreless Transformer Isolated Digital Output 8 Channel 1.2A High Side Switch, Data Sheet, Infineon Technologies www.Infineon.com Page 13 from 14 EVAL 2x8-ISO1H815G V1.1 2 x 8 Channel 1.2A Evaluation Board with ISO1H815G Change service Revision History Application Note EVAL2x8-ISO1H815G-1 Actual Release: V1.1 Date:15.02.2010 Previous Release: Page of Page of Subjects changed since last release actual prev. Rel. Rel. 11 ---------- First Issue For questions on technology, delivery and prices please contact the Infineon Technologies Offices in Germany or the Infineon Technologies Companies and Representatives worldwide: see the address list on the last page or our webpage at http://www.infineon.com Edition 2006-08-28 Published by Infineon Technologies AG, Am Campeon 1-12, 85579 Neubiberg, Germany © Infineon Technologies AG 2/15/10. All Rights Reserved. Attention please! The information herein is given to describe certain components and shall not be considered as a guarantee of characteristics. Terms of delivery and rights to technical change reserved. We hereby disclaim any and all warranties, including but not limited to warranties of non-infringement, regarding circuits, descriptions and charts stated herein. Information For further information on technology, delivery terms and conditions and prices please contact your nearest Infineon Technologies Office (www.infineon.com). Warnings Due to technical requirements components may contain dangerous substances. For information on the types in question please contact your nearest Infineon Technologies Office. Infineon Technologies Components may only be used in life-support devices or systems with the express written approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the failure of that life-support device or system, or to affect the safety or effectiveness of that device or system. Life support devices or systems are intended to be implanted in the human body, or to support and/or maintain and sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other persons may be endangered. www.Infineon.com Page 14 from 14 EVAL 2x8-ISO1H815G V1.1