AN4373 Application note Galvanically-isolated 8 channel high-side driver based on the ISO8200B By Massimo Oteri Introduction The STEVAL-IFP015V2 product evaluation board works in combination with the STEVALPCC009V2 interface board to allow evaluation of all the features of the ISO8200B device. A large GND area on the printed circuit board has been designed to minimize noise effects and ensure good thermal performance. The ISO8200B is a galvanic isolated 8 channel driver featuring a very low supply current. It contains 2 independent galvanic isolated voltage domains (VCC for the power stage and VDD for the digital stage). The IC is intended to drive any type of load with one side connected to ground. Active channel current limitation combined with thermal shutdown, independent for each channel, and automatic restart protect the device against overload. Additional embedded functions are: loss of GND protection which automatically turns off the outputs in case of analog ground, undervoltage shutdown with hysteresis, and reset function for immediate power output shutdown. Built-in thermal shutdown protects the chip against overtemperature and short-circuit. In overload condition, the channel turns off, then back on automatically after the IC temperature has decreased below a reset threshold. If this condition causes the case temperature to reach the TCR limit, the overloaded channel is turned off and will restart only when case and junction temperature have decreased down to the reset threshold. Non overloaded channels continue to operate normally. An internal circuit provides an OR-wired non latched common FAULT indicator signaling channel OVT. The FAULT pin is an open-drain active-low fault indication pin. October 2013 DocID025365 Rev 1 1/14 www.st.com Contents AN4373 Contents 1 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Board description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.1 Power section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.2 Digital interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 3 PC communication using the STEVAL-PCC009V2 connection and HSD GUI interface 11 4 Reference documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 5 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2/14 DocID025365 Rev 1 AN4373 1 Features Features • VCC operating voltage from 10.5 to 33 V • 0.7 A for each channel • Reverse polarity protection on VCC and VDD supply voltage • Digital supply voltage VDD 3.3/5 V • Microcontroller interface direct/synchronous mode communication • Designed to meet requirements of IEC 61000-4-2, IEC 61000-4-4, IEC 61000-4-5 and IEC 61000-4-8 standards • RoHS compliant DocID025365 Rev 1 3/14 14 Board description 2 AN4373 Board description Below the board structure is summarized in terms of connectors and jumpers useful for device driving. Figure 1. STEVAL-IFP015V2 Table 1. STEVAL-IFP015V2 connector and jumper description Name Type Function JP1 Drop jumper VDD digital supply voltage J3 Drop Jumper Output enable pin J2 Screw connector VCC supply voltage J1 Screw connector VDD digital supply voltage J4 Power outputs Device power outputs 30 pin connector Microcontroller interface CN1 Table 2. STEVAL-IFP015V2 30-pin signal connector description Pin number 1 3.3 V communication board digital output voltage 2 GND reference 3 Parallel Input pin IN1 4 Parallel input pin IN2 5 Parallel input pin IN3 6 Parallel input pin IN4 7-12 4/14 Description NC 13 GND reference 14 NC 15 Parallel input 8 16 Parallel input 5 DocID025365 Rev 1 AN4373 Board description Table 2. STEVAL-IFP015V2 30-pin signal connector description (continued) Pin number Description 17 Parallel input 6 18 Parallel input 7 19 Fault feedback for erroneous communication or thermal junction intervention 20 NC 21 NC 22 Not used 23 NC 24,25 Reserved 26,27 NC 28 29,30 GND reference NC Table 3. STEVAL-IFP015V2 electrical specifications (recommended values) Parameter Description VCC Main supply voltage VDD Digital voltage supply IVcc Current consumption VCLAMP Supply voltage clamp Test condition Typ Unit 24 V 3.3 / 5 V VDD = 5 V channels ON 8 VDD = 5 V channels OFF 5 48 mA V Table 4. STEVAL-IFP015V2 component list Reference Description Component Part number CN1 CON30 30 pin connector for flat cable C1 100 uF/50 V Electrolytic capacitor EEEFP1H101AP C2 1 uF/50 V Electrolytic capacitor Low ESR GRM31MR71H105KA88L C3 1 uF/50 V Ceramic capacitor C4 4.7 nF Y1/4 kV Single layer capacitor high Voltage VY1472M63Y5UQ6*V0 C5 4.7 nF Y1 /4 kV Single layer high voltage capacitor C7,C8,C9,C10,C11, C12,C14,C16 22 nF/50 V Ceramic capacitor C6 220 nF/10 V Electrolytic capacitor low ESR DocID025365 Rev 1 VY1472M63Y5UQ6*V0 GRM188R71A224KA01D 5/14 14 Board description AN4373 Table 4. STEVAL-IFP015V2 component list (continued) Reference 6/14 Description Component C13,C15,C17,C18, C19,C20,C21,C22, C23,C24,C25 100 pF/10 V Ceramic capacitor C26 47 uF/10 V Ceramic capacitor D1 STPS1H100A Schottky diode SMD D13 STPS1L60A Schottky diode SMD D2 Red LED D3 Green LED D4 Yellow LED D5, D6, D7, D8, D9, D10, D11, D12 Green LED J1,J2 CON2 Screw connector 2 pole J3 OUT_EN Drop jumper three way J4 CON8 Screw connector 8pole JP1 VDD Drop jumper 4 way R1,R2,R3 680R SMD resistor R4,R5,R6,R7,R8, R9,R10,R12, R14, R15, R16 270R SMD resistor R11 10 k SMD resistor 1% R19,R20,R21,R22 R23,R24, R25, R26, 10 k R27 SMD resistor R17 NC Not connected R13 15 k SMD resistor 1% R18 10 k SMD resistor 1% R28, R29, R30, R31, 6 k8 R32, R33, R34, R35 SMD resistor TP1,TP3,TP4 T POINT A Test point TP2 T POINT R Test point TRS1 SM15T33CA Transil SMD U1 ISO8200B Device PSO36 DocID025365 Rev 1 Part number GRM32ER71A476KE15 AN4373 Board description Figure 2. STEVAL-IFP015V2 component plane Figure 3. STEVAL-IFP015V2 top layer DocID025365 Rev 1 7/14 14 Board description AN4373 Figure 4. STEVAL-IFP015V2 internal layer 1 Figure 5. STEVAL-IFP015V2 internal layer 2 8/14 DocID025365 Rev 1 AN4373 Board description Figure 6. STEVAL-IFP015V2 bottom layer 2.1 Power section This device, due to internal galvanic isolation, has two ground references, GNDDD for VDD digital supply and GNDCC for VCC main supply. Both supply voltages has reverse polarity protection implemented with the STPS1L60A diode on VDD and with STPS1H100A diode on VCC main voltage. The operating supply values are variable within a range of 10.5 V - 3.3 V for VCC supply, and a range of 3.1 V to 5.5 V for VDD. This latter reference can be selected using three way drop jumper J1 Note: The “5 V” and “3.3 V” labels identify connection with a 30 pin connector and the possibility to power the device by microcontroller board, whereas the “EXT” label identifies connection with screw connector. A bidirectional transil diode SM15T33CA, connected on the VCC supply improves EMC stress robustness; while capacitors C4 and C5 realize a coupling network in case of EMC common mode test. 2.2 Digital interface The STEVAL-IFP015V2 microcontroller interface permits device driving in: 1. Direct Mode: for instantaneous output control 2. Synchronous Mode: for triggered outputs control. This mode is useful if a lower delay of all outputs is needed Both modalities are managed by modifying the default state of the Sync and Load signals. By default they are pulled up by the two signal LEDs D2 and D3. Pulling down these two signals at the same time, Direct Mode is active, so it is sufficient to change the input state to change the corresponding output as well. DocID025365 Rev 1 9/14 14 Board description AN4373 Toggling in sequence the Load and Sync signals respectively, modification of the synchronous output state is possible. 10/14 DocID025365 Rev 1 AN4373 3 PC communication using the STEVAL-PCC009V2 connection and HSD GUI interface PC communication using the STEVAL-PCC009V2 connection and HSD GUI interface Figure 7. GUI interface Direct Mode Figure 8. GUI interface Synchronous Mode DocID025365 Rev 1 11/14 14 Reference documents 4 12/14 AN4373 Reference documents • ISO8200B datasheet • IEC 61000-4-4 • IEC 61000-4-5 • IEC 61000-4-2 • IEC 61000-4-8 DocID025365 Rev 1 AN4373 5 Revision history Revision history Table 5. Document revision history Date Revision 15-Oct-2013 1 Changes Initial release. DocID025365 Rev 1 13/14 14 AN4373 Please Read Carefully: Information in this document is provided solely in connection with ST products. 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