EPC9001C

Development Board EPC9001C Quick Start Guide 40 V Half-Bridge with Gate Drive, Using EPC2015C QUICK START GUIDE EPC9001C DESCRIPTION www.epc-co.com The EPC9001C development board is a 40 V maximum device voltage, 15 A maximum output current, half bridge with onboard gate drives, featuring the EPC2015C enhancement mode (eGaN®) field effect transistor (FET). The purpose of this development board is to simplify the evaluation process of the EPC2015C eGaN FET by including all the critical components on a single board that can be easily connected into any existing converter. The EPC9001C development board is 2” x 1.5” and contains two EPC2015Cs eGaN FET in a half bridge configuration using Texas Instruments LM5113 gate driver, supply and bypass capacitors. The board contains all critical components and layout for optimal switching performance. There are also various probe points to facilitate simple waveform measurement and efficiency calculation. A complete block diagram of the circuit is given in Figure 1. For more information on the EPC2015Cs eGaN FET please refer to the datasheet available from EPC at www.epc-co.com. The datasheet should be read in conjunction with this quick start guide. Table 1: Performance Summary (TA = 25°C) SYMBOL PARAMETER MIN MAX UNITS 7 12 V Bus Input Voltage Range 28* V VOUT Switch Node Output Voltage 40 V IOUT Switch Node Output Current VDD Gate Drive Input Supply Range VIN VPWM PWM Logic Input Voltage Threshold CONDITIONS 15* A Input ‘High’ 3.5 6 V Input ‘Low’ 0 1.5 V Minimum ‘High’ State Input Pulse Width VPWM rise and fall time < 10ns 60 ns Minimum ‘Low’ State Input Pulse Width VPWM rise and fall time < 10ns 200# ns * Assumes inductive load, maximum current depends on die temperature – actual maximum current with be subject to switching frequency, bus voltage and thermals. # Limited by time needed to ‘refresh’ high side bootstrap supply voltage. Quick Start Procedure Development board EPC9001C is easy to set up to evaluate the performance of the EPC2015C eGaN FET. Refer to Figure 2. for proper connect and measurement setup and follow the procedure below: 1. 2. 3. 4. 5. 6. 7. 8. 9. With power off, connect the input power supply bus to +VIN (J5, J6) and ground / return to –VIN (J7, J8). With power off, connect the switch node of the half bridge OUT (J3, J4) to your circuit as required. With power off, connect the gate drive supply to +VDD (J1, Pin-1) and ground return to –VDD (J1, Pin-2). With power off, connect the input PWM control signal to PWM (J2, Pin-1) and ground return to any of the remaining J2 pins. Turn on the gate drive supply – make sure the supply is between 7 V and 12 V range. Turn on the bus voltage to the required value (do not exceed the absolute maximum voltage of 100 V on VOUT). Turn on the controller / PWM input source and probe switching node to see switching operation. Once operational, adjust the bus voltage and load PWM control within the operating range and observe the output switching behavior, efficiency and other parameters. For shutdown, please follow steps in reverse. NOTE. When measuring the high frequency content switch node (OUT), care must be taken to avoid long ground leads. Measure the switch node (OUT) by placing the oscilloscope probe tip through the large via on the switch node (designed for this purpose) and grounding the probe directly across the GND terminals provided. See Figure 3 for proper scope probe technique. THERMAL CONSIDERATIONS The EPC9001C development board showcases the EPC2015C eGaN FET. Although the electrical performance surpasses that for traditional silicon devices, their relatively smaller size does magnify the thermal management requirements. The EPC9001C is intended for bench evaluation with low ambient temperature and convection cooling. The addition of heat-sinking and forced air cooling can significantly increase the current rating of these devices, but care must be taken to not exceed the absolute maximum die temperature of 150°C. NOTE. The EPC2015C development board does not have any current or thermal protection on board. EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 | | PAGE 2 QUICK START GUIDE EPC9001C 7 V – 12 V VDD Gate Drive Regulator PWM Input Logic and Dead-time Adjust Gate Drive Supply EPC9001C, 40 V DEVELOPMENT BOARD Rev. 5.0 – + Gate Drive Supply (Note Polarity) VIN LM5113 Gate Driver eGaN® FET © EPC 2013 VDD Supply Half-Bridge with Bypass OUT A IIN + VIN V – (For Efficiency Measurement) Figure 1: Block Diagram of EPC9001C Development Board + Switch Node < 70 V VIN Supply – External Circuit PWM Input EPC EFFICIENT POWER CONVERSION Figure 2: Proper Connection and Measurement Setup EPC9001C, 40V DEVELOPMENT BOARD Rev. 5.0 eGaN® FET © EPC 2013 Do not use probe ground lead Ground probe against TP3 EPC Figure 4: Typical Waveforms for VIN = 24 V to 1.2 V/15 A (500 kHz) Buck converter CH1: VPWM Input voltage – CH3: (IOUT) Switch node current – CH4: (VOUT) Switch node voltage EFFICIENT POWER CONVERSION Minimize loop Place probe in large via at OUT Figure 3: Proper Measurement of Switch Node – OUT Table 2 : Bill of Material Item Qty Reference Part Description Manufacturer / Part # 1 2 3 C4, C10, C11, Capacitor, 1 µF, 10%, 25 V, X5R Murata, GRM188R61E105KA12D 2 C16, C17 Capacitor, 100 pF, 5%, 50 V, NP0 Kemet, C0402C101K5GACTU 3 2 C9, C19 Capacitor, 0.1 µF, 10%, 25 V, X5R TDK, C1005X5R1E104K 4 3 C21, C22, C23 Capacitor, 4.7 µF, 10%, 50 V, X5R TDK, C2012X5R1H475K125AB 5 2 D1, D2 Schottky Diode, 30 V Diodes Inc., SDM03U40-7 6 3 J1, J2, J9 Connector 2pins of Tyco, 4-103185-0 7 1 J3, J4, J5, J6, J7, J8 Connector FCI, 68602-224HLF 8 2 Q1, Q2 eGaN® FET EPC, EPC2015C 9 1 R1 Resistor, 10.0 K, 5%, 1/8 W Stackpole, RMCF0603FT10K0 10 2 R2, R15 Resistor, 0 Ohm, 1/8 W Stackpole, RMCF0603ZT0R00 11 1 R4 Resistor, 7.5 Ohm, 1%, 1/8 W Stackpole, RMCF0603FT7R50 12 1 R5 Resistor, 47 Ohm, 1%, 1/8 W Stackpole, RMCF0603FT47R0 13 6 R19, R20, R21, R22, R23, R24 Resistor, 0 Ohm, 1/16 W Stackpole, RMCF0402ZT0R00 14 2 TP1, TP2 Test Point Keystone Elect, 5015 15 1 TP3 Connector 1/40th of Tyco, 4-103185-0 16 1 U1 I.C., Logic Fairchild, NC7SZ00L6X 17 1 U2 I.C., Gate driver Texas Instruments, LM5113TME 18 1 U3 I.C., Regulator Microchip, MCP1703T-5002E/MC 19 1 U4 I.C., Logic Fairchild, NC7SZ08L6X 20 0 R14 Optional Resistor 21 0 D3 Optional Diode 22 0 P1, P2 Optional Potentiometer EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 | | PAGE 3 1 2 CON2 J9 1 2 CON2 J2 PWM2 CON2 R15 Zero PWM1 R14 Optional R1 10k 5 6 NC7SZ00L6X GND B U1 A C10 1 µF, 25 V 7 8 Y VDD NC NC NC U3 IN GND 9 1 2 R2 Zero GND NC 4 3 MCP1703 OUT 1 NC 2 P2 Optional NC7SZ08L6X GND B U4 A D2 2 Y VDD 47.0 SDM03U40 R5 P1 Optional C4 1 µF, 25 V 7.5 C16 100 pF SDM03U40 R4 D1 2 C11 1 µF, 25 V VCC C17 100 pF LM5113TM U2 Zero R24 0.1 µF, 25 V C19 Zero Zero Zero R20 R23 R19 0.1 µF, 25 V C9 VCC TP2 Keystone 5015 SW OUT J5 CON4 J7 CON4 CON1 TP3 (Optional) 1 C21 C22 C23 4.7 µF, 50 V J6 CON4 GND 70V Max Development Board EPC9001C Schematic Rev 5.0 J8 CON4 TP1 Keystone 5015 D3 Optional J4 CON4 Q2 EPC2015C J3 CON4 Q1 EPC2015C 1 1 J1 1 2 3 4 4 3 2 1 1 2 3 4 4 3 2 1 1 2 3 4 EPC – EFFICIENT POWER CONVERSION CORPORATION | WWW.EPC-CO.COM | COPYRIGHT 2015 | 4 3 2 1 7 - 12 Vdc QUICK START GUIDE EPC9001C | PAGE 4 For More Information: Please contact info@epc-co.com or your local sales representative Visit our website: www.epc-co.com Sign-up to receive EPC updates at bit.ly/EPCupdates or text “EPC” to 22828 EPC Products are distributed through Digi-Key. www.digikey.com Demonstration Board Notification The EPC9001C boards are intended for product evaluation purposes only and is not intended for commercial use. As an evaluation tool, it is not designed for compliance with the European Union directive on electromagnetic compatibility or any other such directives or regulations. As board builds are at times subject to product availability, it is possible that boards may contain components or assembly materials that are not RoHS compliant. Efficient Power Conversion Corporation (EPC) makes no guarantee that the purchased board is 100% RoHS compliant. No Licenses are implied or granted under any patent right or other intellectual property whatsoever. EPC assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind. EPC reserves the right at any time, without notice, to change said circuitry and specifications.