STEVAL-TSP004V2

STEVAL-TSP004V2 Data brief 5 V/4 A, synchronous flyback converter, Power Over Ethernet (PoE) - IEEE 802.3at compliant reference design Features • • • IEEE 802.3at compliant PD interface Works with power supplied from Ethernet LAN cables or from local auxiliary sources Line input voltage range: 40 to 60 VDC • Output voltage: 5 VDC ± 5% • • • • • Output current: 4 A Peak-to-peak output ripple: < 30 mV Efficiency DC-DC full-load: > 92% Overall peak efficiency: > 89% Transient response ΔVOUTPK-PK to 50% load step: < 170 mV • • ΔV in load line case: < 0.5% RoHs compliant Description The STEVAL-TSP004V2 is a reference design for a PoE+, high-efficiency, 5 V/4 A flyback converter based on the PM8803 PoE controller. The PM8803 is a highly integrated device embedding an IEEE802.3at-compliant powered device (PD) interface together with a PWM controller and support for auxiliary sources. Product summary The STEVAL-TSP004V2 reference design is based on an isolated flyback CCM converter featuring synchronous rectification with gate driver transformer. 5 V/4 A, synchronous flyback converter, Power STEVALOver Ethernet (PoE) - IEEE TSP004V2 802.3at compliant reference design High efficiency integrated IEEE 802.3at PoE-PD interface and PWM controller type 2 PSE indicator, plus support for forward active clamp topology PM8803 DB2569 - Rev 2 - May 2019 For further information contact your local STMicroelectronics sales office. www.st.com STEVAL-TSP004V2 Detailed description 1 Detailed description The STEVAL-TSP004V2 reference design for the PM8803 covers a broad range of Power over Ethernet (PoE) applications. The PM8803 is a highly integrated device embedding an IEEE802.3at-compliant powered device (PD) interface together with a PWM controller and support for auxiliary sources. Although the PM8803 can be configured to work in several isolated topologies (self-driven or transformer gatedriven), we focus here on a high-efficiency isolated flyback converter topology with synchronous rectification, 5 V output voltage and 4 A output current capability. Auxiliary sources can be connected to the reference design on two different input connectors: one input (AUX II) allows prevalence of the auxiliary sources with respect to the PoE, whereas the other input (AUX I) allows the use of a wall adapter with voltage lower than the internal PoE UVLO threshold, while still benefitting from the inherent inrush and DC current limit. The possible configurations supported by the STEVAL-TSP004V2 reference design are: • input diode bridges (four possible options, including active bridges) • optional 4-pair detection circuit to detect a high power PSE source • optional booster circuit to increase the max. input current over 800 mA • diode or synchronous rectification (four package options for diode and three package options for MOSFET) • primary side snubber (three options including active clamp) • power transformer (three size options for transformer gate-driven solutions and two size options for selfdriven applications) 1.1 Efficiency Figure 1. STEVAL-TSP004V2 reference design: 5 VOUT overall and DC-DC efficiency DB2569 - Rev 2 page 2/5 STEVAL-TSP004V2 Schematic diagrams 2 Schematic diagrams Figure 2. STEVAL-TSP004V2 circuit schematic (1 of 2) Chassis Chassis J3 10 10 T1 1 2 3 4 5 6 7 8 12 13 1 2 3 4 5 6 7 8 11 14 10 R175R 15 J4 DATA OUTPUT 9 9 0603 16 9 Chassis Chassis 17 8 7 Data and power input R275R 18 0603 6 19 5 20 4 R575R 21 0603 22 3 23 2 1 R10 75R 0603 C5 10nF 10% 0603 100V R11 75R 0603 R12 75R 0603 R775R 24 0603 ETH1-460 R13 75R 0603 C9 2.2nF 2KV 1812 1206 C8 10nF 10% 0603 100V C6 C7 10nF 10% 10nF 10% 0603 0603 100V 100V R1250R0 TP24 BLACK C12 2.2nF 2KV 1812 Chassis Chassis SP TP22 Red TP2 Red AUX 1 J2 D1 R26 1 2 3 0R01206 R17 POE+F POE+F 0R01206 STTH302S SMC SP C14 1nF 10% 0603 100V D9 STPS2H100A SMA D8 STPS2H100A SMA D4 STPS2H100A SMA D7 STPS2H100A SMA R32 15K 0805 D12 STPS2H100A SMA D17 STPS2H100A SMA D14 STPS2H100A SMA RTN C18 D11 0.1µF 10% SMAJ58A SMA 0805 100V C16 1nF 10% 0805 100V C21 1nF 10% 0603 100V D13 STPS2H100A SMA R37 R43 0R0 1206 0R01206 TP3 BLACK Auxiliary input frontal or AUXI VSS TP23 BLACK Figure 3. STEVAL-TSP004V2 circuit schematic (2 of 2) 48VAUX2 J1 TP7 Red TP4 Red R49 1206 0R0 1 2 3 D21 L5 TP9 Red 10µH 1 STTH302S C22 TBD 2 MSS7341-103ML 2KV 1812 SMC SA C64 R51 15K 0805 2.2µ 1210 100V C26 33µF 20% 100V 10x10.2 C28 C29 2.2µ 1210 100V 2.2µ 1210 100V C30 68pF 0805 100V TP5 Red R23 100R 1206 R54 1206 0R0 L60.33uH 7 6 1 1 Red 2 9 10 1206 8 7 6 5 4 T5 5 D28 R66 10R D52 BAT46J R70 10K 1% 1% 10nF R65 1K C67 C68 22uF 1206 16V 22uF 1206 16V 22uF 1206 16V 22uF 1206 16V 4 C33 C35 22uF 1206 16V 22uF 1206 16V C34 330uF 16V 8x10.2 1 2 D26 C36 0.1u 1 2 TP12 BLACK Output filter STL60N3LLH5 TP13 Red 10R BAT46J C39 1uF 25V 0603 SOD323 C37 PowerFLAT™ 5x6 R62 C38 3 2 1 C27 Q12 COILCRAFT HA3691-AL R58 27K J5 R52 3K3 0805 0805 TP10 Red SA R53 5R Out det C31 1.5nF R21 220R RTN POE+F R72 120K 1% 1% TP6 2 DO1813-331ML Input filter TP8 BLACK SOD323 TP14 Red C41 1uF 25V 0603 D32 MM3Z15VT1 SOD323 C40 1uF 25V 0805 RTN D34 COILCRAFT DA2319-AL R64 0R0 4 ARTN R84 R131 R27 SP 15 30R9 1% R0805 14 R95 27k 13 24.9K 1%1% 12 11 C19 10nF VSS MMBT3904LT1 SOT23 Q18 R38 1k C69 10nF R101 24.9K 1% 1% R9 1K 1% R0603 FRS RTN GAT1 CLS VC SP GAT2 DET ARTN VDD RTN VDD PM8803 C23 470nF 10% 50V 0603 VB CS DT SA DCCL VSS D36 BAT46J SOD323 Q16 MMBT3906LT1 SOT23 1 0R0 R96 0R0 U3 2 R89 3.3K 3 4 R92 10R 5 TP16 6 TP15 Red D57 7 BAT46J 8 2 C49 3.3nF C50 47nF SO8 4 Q17 BAT46J ARTN D40 SOD323 TP18 Red R107 10K R1044.7K 1% C5647nF BAT46J HTSSOP20-LARGE ARTN C55 100pF R99 47K D39 510R C54 470p C60 1nF C59 1µF 25V 0603 R108 R109 0.30 ohm 1% 0.30 ohm 1% 1206 1206 0805 Power circuit VC TP19 BLACK RTN C61 2.2n 2KV 1% SOD323 3 100V TP11 BLACK C48 1µF 25V 0603 R93 1K R94 21K 1% 1% Si4848DY 9 C53 1uF 1 SOD323 R103 10 4 3 R90 1k5 Red R0805 R91 10R Fairchild FOD817AS 0.1uF 5 6 7 8 17 16 CTL R83 10K 3 R80 20R T8 1 2 3 19 18 T2P ExPad 20 BAT46J SOD323 0.1uF C45 21 T2P 6 RTN U1 C44 1 U4 4 1 2 TS431AILT R111 12.4K 1% 1% R112 15K 1% 1% 5 SOT23-5 1812 RTN Feedback circuit ARTN R122 0R0 RTN D20 Aux det SA SP JM1 Double jumper U2 R45 1 2 3 JM2 Double jumper VSS 3 24.9K Fairchild FOD817AS 1 4 2 3 R44 3K3 D44 T2P det TP21 Red Auxiliary present U7 R1175.1K VC T2P Fairchild FOD817AS 1 4 2 3 R119 3.3K TP20 Red T2P present 1 2 RTN DB2569 - Rev 2 page 3/5 STEVAL-TSP004V2 Revision history Table 1. Document revision history Date Version 24-Apr-2015 1 Changes Initial release. Updated title. 07-May-2019 2 Added product summary table. Minor text and formatting changes. DB2569 - Rev 2 page 4/5 STEVAL-TSP004V2 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. 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