19-5989 Rev 0 8/11 MAX5974E Evaluation Kit Evaluates: MAX5974E General Description Features The MAX5974E evaluation kit (EV kit) is a fully assem- S IEEE 802.3af/at-Compliant PD Interface Circuit bled and tested surface-mount circuit board featuring S -39V to -57V Startup Input Voltage Range the MAX5974E spread-spectrum, current-mode PWM S 91% Efficiency (at VIN = +48V) controller for Power-over-Ethernet (PoE) powered device S Nonisolated +3.3V Output at 1.8A (PD) applications. The EV kit circuit is a nonisolated, compact, and low-cost design used in Power-over-LAN S PD Detection and Configurable Classification (PoLAN) applications requiring DC power from an Ethernet Signatures network port for PDs such as IP phones, wireless access S 2-Event Classification and Wall-Adapter Detect nodes, and security cameras. Output The EV kit features a Class 2 PD with a 200kHz switching S Inrush Current Limit of 180mA (max) frequency flyback DC-DC converter using the IC. The S Internal UVLO at -38.6V circuit achieves high efficiency up to 91% using a synchronous rectifier. The surface-mount transformer S Evaluates Endspan and Midspan Ethernet provides energy storage for the output, which is configured Systems for +3.3V and provides up to 1.8A load current. S Simplified Wall-Adapter Interface M The EV kit includes the MAX5969B IEEE 802.3af/ S Proven PCB Layout at-compliant PD interface-controller IC that provides S Fully Assembled and Tested PD detection signature, PD classification signature, inrush current control, undervoltage lockout (UVLO), and current limit after the PD is on. Ordering Information appears at end of data sheet. The EV kit circuit receives its power from IEEE 802.3af/ at-compliant power-sourcing equipment (PSE). The PSE provides the required -39V to -57V DC power over a twisted-pair Ethernet network cable to the EV kits RJ45 M MagJack . The EV kit features a 1 x 1Gb RJ45 MagJack and two full-bridge diodes for separating the DC power provided by an endspan or midspan Ethernet system. The EV kit circuit can also be powered by a +39V to +57V wall-adapter power source applied at the WAD IN and WAD GND PCB pads. When a wall-adapter power source is detected, it always takes precedence over the PSE source, allowing the wall adapter to power the EV kit. Warning: The EV kit is designed to operate with high voltages. Dangerous voltages are present on this EV kit and on equipment connected to it. Users who power up this EV kit or power the sources connected to it must be careful to follow safety procedures appropriately to work with high-voltage electrical equipment. Under severe fault or failure conditions, this EV kit may dissipate large amounts of power, which could result in the mechanical ejection of a component or of component debris at high velocity. Operate this kit with care to avoid possible personal injury. IEEE is a registered service mark of the Institute of Electrical and Electronics Engineers, Inc. MagJack is a registered trademark of Bel Fuse Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX5974E Evaluation Kit Evaluates: MAX5974E Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION Not installed, ceramic capacitor 2200pF, 100V X5R ceramic C1 0 (0805) C20, C22 2 capacitors (0603) Murata GRM188R72A222K 0.1F Q10%, 100V X7R ceramic C2, C18 2 capacitors (0805) 0.22F, 25V X5R ceramic TDK C2012X7R2A104K C21 1 capacitor (0603) Murata GRM188R61E224KA88B 0.1F Q10%, 16V X7R ceramic C3, C12 2 capacitors (0603) Not installed, ceramic capacitor C23 0 Murata GRM188R71C104k (0603) 100V, 0.8A bridge rectifiers 10F Q10%, 25V X7R ceramic D1, D2 2 (MiniDIP) C4 1 capacitor (1206) Diodes Inc. HD01-T Murata GRM31CR61E106K Transient voltage suppressor 10F Q20%, 16V X5R ceramic (SMB) C5 1 capacitor (0603) D3 1 Diodes Inc. SMBJ58A-13-F Murata GRM188R60J106M (Top Mark: NG) 1F Q10%, 100V X7R ceramic 60V, 500mA Schottky diode C6, C13 2 capacitors (1206) D4 1 (SOD123) TDK C3216X7R2A105K D6 0 Not installed, TVS diode (SMA) 22F Q20%, 63V electrolytic D7 0 Not installed, diode (SMA) C7 1 capacitor (6.6mm x 6.6mm) 100V, 2A Schottky diode (SMB) Panasonic EEEFK1J220XP D8 1 Diodes Inc. ES2B-13-F 1000pF Q10%, 1500V X7R 80V, 100mA switching diode C8 1 ceramic capacitor (1808) D10 1 (SOD323) AVX 1808SC102KAT1A Diodes Inc. 1N4148WS 330pF Q20%, 50V X7R ceramic Not installed, zener diode C9 1 capacitor (0603) D11 0 (SOT23) Murata GRM188R72A331M Modular 8-position, side-entry J1 1 100F Q20%, 6.3V X5R ceramic jack assembly C10, C11 2 capacitors (1210) 80V, 2A common-mode choke Murata GRM32ER60J0J107M L1 1 TDK ZJYS81R5-2P24 or 0.01F Q10%, 25V X7R ceramic Sumida CPFC74NP-4251-T11 C14 1 capacitor (0603) 3.3H, 2.6A inductor Murata GRM188R71E103K L2 1 Cooper Bussmann SD53-3R3-R 0.047F, 10V X7R ceramic 50V, 2A common-mode choke C15 1 capacitor (0603) L3 1 TDK ZJYS51R5-2P-01 or AVX 0603ZG473ZAT2A Sumida CPFC74NP-PS02H2A20 100pF, 25V X7R ceramic 30V, 5.3A n-channel MOSFET C16 1 capacitor (0603) (SOT23), AVX 06033C102MAT2A N1 1 International Rectifier IRLML0030TRPbF 0.1F, 25V X5R ceramic C17 1 capacitor (0603) 150V, 1.6 A, 261mI n-channel Murata GRM188R61E104K N2 1 MOSFET (3 SuperSOT) 1000pF, 25V X5R ceramic Fairchild FDN86246 C19 1 capacitor (0603) Not installed, npn transistor Q1 0 Murata GRM188R61H102K (SOT23) Maxim Integrated Products 2