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Texas Instruments TPS23758RJJ | Demoboard TIDA-010083
IEEE 802.3at PoE PD with no-opto sync flyback DC-DC controller
Details
| Topologie | Sperrwandler |
| Eingangsspannung | 18-57 V |
| Ausgang 1 | 5 V / 2.5 A |
| IC-Revision | 001 |
Beschreibung
Ethernet (PoE) powered device (PD) interface, a 150-V switching power FET, and a current-mode DC-DC controller optimized for flyback topology. The high level of integration along with primary side regulation (PSR), spread spectrum frequency dithering (SSFD), and advanced startup makes the TPS23758 an ideal solution for size-constrained applications. The PoE implementation supports the IEEE 802.3at standardas a 13-W, Type 1 PD. The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for operation in continuous conduction mode (CCM) with secondary side synchronous rectification, resulting in optimum overall efficiency, regulation accuracy and step load response over multiple outputs (for example 5-V and 3.3-V output). Typically, the converteroperates at a switching frequency of 250 kHz.SFFD and slew rate control helps to minimize the size and cost of the EMI filter. Advanced Startup allows the use of minimal bias capacitor while simplifying converter startup and hiccup design. Primary auxiliary power detect (APD) pin can be used to provide priority for a primary side power adapter.The DC-DC controller features adjustable soft-start, slope compensation, and blanking. For non-isolated applications, the buck topology is also supported by the TPS23758.
Eigenschaften
- Complete IEEE 802.3at PD solution for type 1 PoE– Ethernet Alliance (EA) logo certified designs available– Robust 100-V, 0.36-Ω (typ) hotswap MOSFET
- Integrated PWM controller with 0.77-Ω (typ) 150-V power MOSFET– Flyback controller with PSR– Supports CCM operation with secondary
- side synchronous FET— multi-outputs– ±1% (typ, 5-V Output) Load regulation (0-
- 100% load range) — with Sync FET– Supports low-side switch buck topology– Adjustable switching frequency with
- synchronization– Soft-start control with advanced startup– Programmable slew rate and frequency
- dithering for enhanced EMI reduction
- Primary adapter priority input
- –40°C to 125°C Junction temperature range
- Small 6-mm x 4-mm VSON package
Typische Anwendungen
- IEEE 802.3at compliant powered devices / VoIP phones / Security cameras / IP phones / Access points
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | λDom typ.(nm) | Emittierte Farbe | λPeak typ.(nm) | IV typ.(mcd) | VF typ.(V) | Chiptechnologie | 2θ50% typ.(°) | C | Tol. C | VR(V (DC)) | Bauform | Q(%) | RISO | Keramiktyp | L(mm) | B(mm) | H(mm) | Fl(mm) | Verpackung | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | fres(MHz) | VOP(V) | Vin | VOut1(V) | IOut1(A) | Vaux(V) | Qmin. | n | ISAT(A) | LS(µH) | Datenrate | Ports | PoE | Improved CMRR | Betriebstemperatur | VT(V (RMS)) | Montageart | L(µH) | CWW 1(pF) | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WL-SMCC SMT Mono-color Chip LED Compact, 525 nm, Grün | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWL-SMCC SMT Mono-color Chip LED Compact | dominante Wellenlänge [typ.]525 nm | Emittierte FarbeGrün | Spitzen-Wellenlänge [typ.]515 nm | Lichtstärke [typ.]800 mcd | Durchlassspannung [typ.]3.2 V | ChiptechnologieInGaN | Abstrahlwinkel Phi 0° [typ.]120 ° | – | – | – | Bauform0402 | – | – | – | Länge1 mm | Breite0.5 mm | Höhe0.4 mm | – | VerpackungTape and Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Betriebstemperatur -40 °C up to +85 °C | – | MontageartSMT | – | – | ||||
 | WE-MAPI SMT-Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-MAPI SMT-Speicherdrossel | – | – | – | – | – | – | – | – | – | – | Bauform3015 | – | – | – | Länge3 mm | Breite3 mm | Höhe1.5 mm | – | – | Performance Nennstrom2.7 A | Sättigungsstrom @ 30%3.85 A | Gleichstromwiderstand114 mΩ | Eigenresonanzfrequenz35 MHz | Betriebsspannung80 V | – | – | – | – | – | – | Sättigungsstrom3.2 A | – | – | – | – | – | Betriebstemperatur -40 °C up to +125 °C | – | MontageartSMT | Induktivität3.3 µH | – | ||||
 | WE-LAN LAN Übertrager, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LAN LAN Übertrager | – | – | – | – | – | – | – | – | – | – | – | – | – | – | Länge17.5 mm | Breite14.2 mm | Höhe5.4 mm | Pad Dimension13.97 mm | – | – | – | – | – | – | – | – | – | – | – | Übersetzungsverhältnis1:1 | – | – | Datenrate1000 Base-T | Ports1 | PoEPoE (bis zu 350 mA) | Verbesserte Common Mode EntstörungNein | Betriebstemperatur 0 °C up to +70 °C | Prüfspannung1500 V (RMS) | MontageartSMT | Induktivität350 µH | – | ||||
| WCAP-CSGP MLCCs 10 V(DC), –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 10 V(DC) | – | – | – | – | – | – | – | Kapazität22 pF | Kapazität±5% | Nennspannung10 V (DC) | Bauform0402 | Güte840 % | Isolationswiderstand10 GΩ | KeramiktypNP0 Klasse I | Länge1 mm | Breite0.5 mm | Höhe0.5 mm | Pad Dimension0.25 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | – | – | Güte [1]840 | – | – | – | – | – | – | – | Betriebstemperatur -55 °C up to +125 °C | – | – | – | – | |||||
 | WE-FLYTI MID-FLYTI Flyback Transformers for Texas Instruments, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | – | – | – | – | – | – | – | – | – | – | BauformEPQ13 | – | – | – | Länge13.97 mm | Breite18.25 mm | Höhe14.5 mm | – | – | – | – | – | Eigenresonanzfrequenz1.4 MHz | – | Input Voltage 36 - 57 V (DC) | Ausgangsspannung 15 V | Ausgangsstrom 12.4 A | Hilfsspannung10.5 V | – | Übersetzungsverhältnis6:1:1:2.25 | Sättigungsstrom1.5 A | Streuinduktivität1 µH | – | – | – | – | Betriebstemperatur -40 °C up to +125 °C | Prüfspannung1500 V (RMS) | MontageartSMT | Induktivität150 µH | Koppelkapazität85 pF |