EV6902-S-00B High Efficiency Synchronous Rectification EV Board The Future of Analog IC Technology DESCRIPTION FEATURES The EV6902-S-00B is an evaluation board for the MP6902DS. It is configured to provide synchronous rectification solution for Flyback/LLC topology. • MP6902DS features a synchronous gate output which enables high efficiency rectification by relating the schottky rectifier with a low Ron MOSFET. • • • • ELECTRICAL SPECIFICATIONS • Parameter Supply Voltage Symbol Value Units VDD 8–24 V • • • Works with both Standard and Logic Level FETS Compatible with Energy Star, 1W Standby Requirements VDD Range From 8V to 24V Fast Turn-off Total Delay of 20ns Max 400kHz Switching Frequency <300μA Quiescent Current at Light Load Mode Supports CCM, DCM and Quasi-Resonant Topologies Supports High-side and Low-side Rectification Power Savings of Up to 1.5W in a Typical Notebook Adapter APPLICATIONS • • • • Industrial Power Systems Distributed Power Systems Battery Powered Systems Flyback/LLC Converters All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. EV6902DS-00A EVALUATION BOARD (L x W x H) 1.14” x 1.14” x 0.6” 2.9cm x 2.9cm x 1.4cm Board Number MPS IC Number EV6902-S-00B MP6902DS EV6902-S-00B Rev. 1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 EV6902-S-00B – HIGH EFFICIENCY SYNCHRONOUS RECTIFICATION EV BOARD EVALUATION BOARD SCHEMATIC 1 VG 1 VS 1 VD D3 75V/0.15A R10 Q1 MOSFET Q2 NS U1 R4 NS 4 D1 NS D2 NS R3 1K 5 7 8 VD VDD PGND VSS NC RLL VG EN Q3 6 1 3 C1 2.2uF R2 100K 2 MP6902/SO8 C2 1nF D4 BZT52C20-F/20V/5mA 1 EN 1 PGND R7 0 R6 100K R5 100K 1 VDD EV6902-S-00B BILL OF MATERIALS Qty 1 1 2 1 1 0 2 RefDes C1 C2 R1,R7 R2 R3 R4 R5,R6 Value 2.2μF 1Nf 0 100k 1k NS 100k 1 Q1 MOSFET 0 Q2 NS 1 Q3 MMBTA06LT1G 0 0 1 1 1 D1 D2 D3 D4 U1 NS NS DIODES BZT52C20 MP6902DS Description Ceramic Cap., 25V, X7R Ceramic Cap., 50V, X7R Film Res., 5% Film Res., 1% Film Res., 1% Film Res., 5% N-CH 100V 8.8mΩ N-CH 100V 8mΩ NPN 0.5A Transistor, 80V, 75V/0.15A ZENER DIODE, 20V MP6902DS Package 0805 0603 0603 0603 0603 Manufacturer muRata TDK Yageo Yageo Royaohm Manufacturer P/N GRM21BR71E225KA73L C1608X7R1H102K RC0603JR-070RL RC0603FR-07100KL 0603F1001T5E 0805 TO220-AB TO220 PowerPAKSO8 Yageo Vishay APEC SOT-23 DIODES MMBTA06LT1G SMB TO220 SOD323 SOT-123 SO-8 DIODES MPS IN4148WS-7-F BZT52C20-F MP6902DS RC0805JR-07100KL SUP90N10-8M8P AP85T10GP EV6902-S-00B Rev. 1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 2 EV6902-S-00B – HIGH EFFICIENCY SYNCHRONOUS RECTIFICATION EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV6902-S-00B Rev. 1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 3 EV6902-S-00B – HIGH EFFICIENCY SYNCHRONOUS RECTIFICATION EV BOARD QUICK START GUIDE Using external power supply to power the SR IC 1. Connect the positive and negative terminals of the power supply to the VDD and PGND pins, respectively. 2. Preset the power supply output 8V~24V, then turn off the power supply. 3. Connect the Drain and Source and Gate terminals of the synchronous power MOSFET to the VD and VS and VG pins, respectively (There is already a 100V power MOSFET Q1 connected on the board, if the customer do not want to use this MOS as synchronous MOSFET, you can remove this Q1 and use your own MOSFET instead). 4. Turn the power supply on. The IC will automatically startup and drive the synchronous MOSFET Q1 to work as an ideal diode. Using drain of the MOSFET or system output to power the SR IC (without external power supply) 1. Connect the VDD terminal of the EVB to the Drain of the synchronous power MOSFET or system output. 2. Connect the Drain and Source and Gate terminals of the synchronous power MOSFET to the VD and VS and VG pins, respectively (There is already a 100V power MOSFET Q1 connected on the board, if the customer do not want to use this MOS as synchronous MOSFET, you can remove this Q1 and use your own MOSFET instead). 3. The IC will automatically startup and drive the synchronous MOSFET Q1 to work as an ideal diode. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV6902-S-00B Rev. 1.0 www.MonolithicPower.com 12/18/2013 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 4