EV6908-S-01A MPS | Alldatasheet

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Synchronous Rectification EV Board EV6908-S-01A Rev. 1.0 www.MonolithicPower.com 1 1/26/2018 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. The Future of Analog IC Technology

DESCRIPTION

The MP6908 is a low-drop diode emulator IC that, when combined with an external switch, replaces Schottky diodes in high-efficiency flyback converters. The MP6908 regulates the forward drop of an external synchronous rectifier (SR) MOSFET to about 40mV, which switches off once the voltage becomes negative. The MP6908 can generate its own supply voltage for battery charging applications with a low output voltage or high-side rectification applications. Programmable ringing detection circuitry prevents the MP6908 from turning on falsely during discontinuous conduction mode (DCM) and quasi-resonant operation. EV6908-S-01A is the evaluation board for MP6908.

FEATURES

 Wide Output Range down to 0V  No Need for Auxiliary Winding for High-Side or Low-Side Rectification  Ringing Detection Prevents False Turn-On during DCM and Quasi-Resonant Operations  Works with Standard and Logic Level SR MOSFETs  Compatible with Energy Star  ~30ns Fast Turn-Off and Turn-On Delay  ~100µA Quiescent Current  Supports DCM, CCM, and Quasi-Resonant Operations  Supports both High-Side and Low-Side Rectification  TSOT23-6 Package Available

APPLICATIONS

 USB PD Quick Chargers  Adaptors  Flyback Power Supplies with Very Low and/or Variable Output Voltage All MPS parts are lead-free, halogen 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. EV6908-S-01A EVALUATION BOARD (L x W) 2.9cm x2.9cm Board Number MPS IC Number EV6908-S-01A MP6908

EV6908-S-01A – HIGH EFFICIENCY SYNCHRONOUS RECTIFICATION EV BOARD EV6908-S-01A Rev. 1.0 www.MonolithicPower.com 2 1/26/2018 MPS Proprietary Information. Patent Protec ted. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC HVC1 VSS2 SLEW3 VDD 4 VG 5 VD 6 MP6908 TSOT23-6 3 2 200k HVC 470nF

1 VDD

5, 6, 7, 8 1, 2, 3 NC VD

1 VSS

Qty RefDes Value Description Package Manufacturer Manufacturer P/N

1 C1 470nF Ceramic

Capacitor;25V;X7R 0805 TDK C2012X7R1E474K

1 R1 0 Film Resistor;1% 0603 Yageo RC0603FR-070RL

2 R3,R4 300 Film Resistor;1% 0603 Yageo RC0603FR-07301RL

1 R2 200k Film Resistor;1% 0603 Yageo RC0603FR-07200KL

1 D1 BAV21W Diode,200V SO D-123 Diodes BAV21W-7-F

1 U1 MP6908 Smart Synchronous

6 MPS MP6908GJ-Z

1 Q1 FDPF045N10A MOSFET TO220-3 Fairchild FDPF045N10A

0 D2,D3,Q2,S

3 VG,HVC,V

2 VD,VSS 2mm

EV6908-S-01A – HIGH EFFICIENCY SYNCHRONOUS RECTIFICATION EV BOARD NOTICE: The information in this document is subject to change wi thout notice. Users should warra nt and guarantee that third party Intellectual Property rights are not infringed upon w hen integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. EV6908-S-01A Rev. 1.0 www.MonolithicPower.com 4 1/26/2018 MPS Proprietary Information. Patent Protect ed. Unauthorized Photocopy and Duplication Prohibited. © 2018 MPS. All Rights Reserved. QUICK START GUIDE 1. Connect the VSS and VD pin into the flyback circuit to replace the freewheel diode. 2. Choose the supply voltage: Connect HVC to VSS. The VDD will be supplied to 5V. Connect HVC to a high voltage (level or switching). The VDD will be supplied to 9V. 3. Turn the power supply on. The IC will start up and work as a freewheel diode automatically.