TPS23758RJJT - 802.3at PoE PD with Flyback Controller | TI
部品番号: TPS23758RJJT ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $2.19 | $2.19 |
| 10 | $2.05 | $20.50 |
| 100 | $1.89 | $189.00 |
| 500 | $1.75 | $875.00 |
| 1,000 | $1.62 | $1,620.00 |
TPS23758RJJT 概要
A PoE PD interface and controller is a power management IC that performs the powered-device detection, classification, and inrush-current limiting required by IEEE 802.3at, then provides the front-end power conversion for extracting DC power from Ethernet cabling. In the system hierarchy it sits at the entry point of the power path: Ethernet cable -> PD interface -> flyback converter -> isolated DC rails.
Key features include the integrated 150-V power MOSFET, which eliminates an external switch and shrinks BOM count, and primary-side regulation (PSR), which removes the optocoupler and secondary-side feedback circuits from the isolated converter. Advanced startup supports operation directly from the Ethernet input voltage, and spread spectrum frequency dithering (SSFD) eases EMI compliance.
Technically, the TPS23758 is a Type 1 (13 W class) 802.3at PD solution. The current-mode flyback architecture with PSR delivers tightly regulated isolated outputs without a secondary feedback path, while the integrated high-voltage FET withstands PoE input transients. According to the TI product page, the high level of integration makes the TPS23758 an ideal solution for size-constrained applications such as IP cameras, wireless access points, and VoIP phones.
Typical applications include IEEE 802.3at Type 1 PoE powered devices, IP network cameras, 802.11 access points, and IP telephones where board area and isolation compliance drive the design.
A key design consideration is the converter transformer: PSR flyback designs require careful transformer selection (leakage inductance and turns ratio) to maintain output regulation accuracy; TI's TPS23758EVM-080 evaluation module provides a proven reference design.
This page synthesizes distributor pricing, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet.
ドロップイン代替品: TPS23758RJJT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
このシリーズのバリエーション
同一シリーズでドロップイン互換のモデル: TPS23758RJJT （同一形状・フットプリント） — 相違点: Evaluation Module, Function, Output Power Class, Package.
クイック比較ツール — 並列比較する代替部品を選択:
TPS23754RJJR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS23755RJJR
✅ ドロップイン ⚠️ 仕様未検証✓ 在庫あり
$1.1 / 個
データシートを見る →TPS23757RJJR
✅ ドロップイン ⚠️ 仕様未検証📋 参考代替品（カタログ未掲載）
TPS23758RJJT 最大定格＆電気的特性
| 機能 | IEEE 802.3at PoE PD interface with no-opto sync flyback DC-DC controller |
| PoE Standard | IEEE 802.3at (Type 1, 13 W class) |
| チャネル数 | 1 |
| Integrated Power FET Voltage Rating | 150 V |
| トポロジー | Current-mode flyback, synchronous, no-opto |
| Regulation Scheme | Primary Side Regulation (PSR) |
| EMI Technique | Spread Spectrum Frequency Dithering (SSFD) |
| Startup | Advanced startup from PoE input |
| パッケージ | 24-VSON (6x4 mm) exposed pad (24-VFDFN, 23 leads) |
| 実装タイプ | Surface Mount |
| Output Power Class | 13 W (Type 1 PoE PD) |
| Evaluation Module | TPS23758EVM-080 |
TPS23758RJJT 24-vson (6x4 mm) exposed pad (24-vfdfn, 23 leads) ピン配置ガイド
TPS23758RJJT (24-vson (6x4 mm) exposed pad (24-vfdfn, 23 leads) パッケージ) のピン配置。 このパワーデバイスは、ゲート、ドレイン、ソース端子を備えています。非極性パッケージの場合、正確なピン1の向きとフットプリントの詳細については、メーカーのデータシートを参照してください。主な用途には、電源設計、モータ駆動、負荷スイッチングがあります。
詳細なピン配置データはありません: TPS23758RJJT.
詳細は データシート をご参照ください。
安全動作領域 (150-V integrated power FET)
主な用途
TPS23758RJJT の用途: 6 件s: IP Network Cameras, IEEE 802.11 Wireless Access Points, VoIP and IP Telephones, Size-Constrained PoE Powered Devices, Industrial PoE Sensor Nodes, PoE-Enabled Security and Access-Control Devices.
IP Network Cameras
IP cameras are the flagship application for integrated PoE PD front ends because camera housings impose severe height and area limits. The TPS23758RJJT fits by combining the 802.3at PD interface, a 150-V internal FET, and the flyback controller in one 24-VSON (6x4 mm) exposed-pad package, eliminating a discrete high-voltage MOSFET and the optocoupler from the isolated supply. Primary-side regulation delivers an isolated 5 V or 3.3 V rail for the image sensor and ISP without secondary feedback components, while spread spectrum frequency dithering (SSFD) reduces switching harmonics that could couple into analog video paths. The 13 W Type 1 power class covers typical fixed and PTZ-lite camera loads. Designers should follow the TPS23758EVM-080 transformer recommendations to hold PSR output regulation within camera tolerance limits.
おすすめ
IEEE 802.11 Wireless Access Points
Wireless access points powered over Ethernet benefit directly from the TPS23758RJJT's integration level: one 24-VSON package provides PD classification, inrush limiting, the 150-V switching FET, and a current-mode no-opto flyback converter, freeing PCB area for RF front ends and reduced board layers. The advanced startup circuit supports startup directly from the PoE input voltage, simplifying brown-out behavior on long cable runs where the input voltage sags. PSR removes the optocoupler, improving reliability in ceiling-mounted equipment where service access is costly. SSFD eases conducted EMI compliance alongside the radio. Note that designs drawing above the 13 W Type 1 budget (e.g., multi-radio 802.11ax APs) require a higher-class PD device instead; the TPS23758 targets single-radio or lite configurations.
おすすめ
VoIP and IP Telephones
IP phones are classic 802.3at Type 1 (13 W) powered devices, and the TPS23758RJJT maps cleanly onto their power architecture: the integrated PD interface handles detection, classification, and 802.3at inrush compliance, while the internal 150-V FET and PSR flyback controller generate the isolated 5 V handset/DSLIC rail and downstream LDO inputs in a compact 24-VSON (6x4 mm) footprint. Eliminating the optocoupler via primary-side regulation reduces component count in cost-sensitive phone BOMs and removes an aging-sensitive part. The no-opto architecture also improves transient response consistency across production. Layout should keep the primary switching loop tight to limit radiated emissions near the handset audio path, per the TI datasheet layout section.
おすすめ
Size-Constrained PoE Powered Devices
Per the TI product description, the high integration level along with PSR, SSFD, and advanced startup makes the TPS23758 an ideal solution for size-constrained applications in general: security sensors, building-automation endpoints, thin access-control readers, and ceiling or wall-plate electronics where every cubic millimeter counts. The single 24-VSON (6x4 mm) package replaces a PD controller, an external high-voltage MOSFET, an optocoupler, and secondary feedback circuitry, cutting both board area and assembly cost. The 150-V FET rating provides margin against PoE input transients, and spread spectrum dithering reduces the size of EMI filtering needed. Engineers porting an EVM-080-based design should re-verify transformer parameters against their exact output voltage and current requirements to preserve PSR regulation accuracy.
おすすめ
Industrial PoE Sensor Nodes
Industrial Ethernet sensor and IoT nodes increasingly draw power from the same cable that carries data, and the TPS23758RJJT provides a robust front end for these Type 1 (13 W) nodes. The integrated 150-V power FET withstands the voltage transients common in factory cabling, while advanced startup ensures reliable power-up from the PoE input under worst-case cable conditions. Primary-side regulation keeps the isolated output free of optocoupler drift over the industrial temperature span, an advantage for long-life sensor installations. SSFD reduces conducted emissions, easing system-level EMI qualification in electrically noisy plants. The compact 24-VSON (6x4 mm) exposed-pad package provides a low thermal-resistance path to the PCB copper, supporting dissipative loads without a heatsink in most node designs.
おすすめ
PoE-Enabled Security and Access-Control Devices
Access-control panels, door controllers, and security sensors powered via PoE require an isolated, compliant power front end in a small footprint - exactly the TPS23758RJJT's design center. The device performs the IEEE 802.3at detection and classification handshake required by managed PoE switches, then its integrated 150-V FET and PSR flyback controller deliver an isolated logic rail without an optocoupler, improving mean time between failures for security infrastructure that must stay online. The no-opto scheme also removes a component sensitive to dust and temperature, valuable in uncontrolled environments. Type 1 (13 W) power capability covers most reader and controller loads; lock-solenoid bursts should be buffered with local bulk capacitance downstream of the flyback output, sized per the datasheet's output capacitance guidance.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TPS23758RJJT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TPS23754RJJR | TPS23755RJJR | TPS23757RJJR |
|---|---|---|---|---|
| Package | 24-VSON (6x4 mm) exposed pad | 24-VSON (6x4 mm) - same | 24-VSON (6x4 mm) - same | 24-VSON (6x4 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| PoE Standard | IEEE 802.3at (Type 1, 13 W) | IEEE 802.3at family | IEEE 802.3at family | IEEE 802.3af (12.95 W class) |
| Regulation Scheme | Primary Side Regulation (no-opto) | PSR flyback family | PSR flyback family | PSR flyback family |
主な差別化要因
- Fully integrated PoE PD front end （vs TPS23757RJJR)
- Optocoupler eliminated by PSR （vs TPS23754RJJR)
- 150-V integrated power FET （vs discrete PD + external FET solutions)
設計ノート
Place the primary switching loop (transformer primary, integrated 150-V FET drain/source, and current-sense path) with minimal area on the top layer, using the exposed pad of the 24-VSON (6x4 mm) package as the primary thermal and grounding path. Connect the exposed pad to a solid ground pour with an array of thermal vias. Keep the PoE classification and detection pins away from the high dv/dt drain node to avoid misclassification. Follow the TI datasheet layout section and the TPS23758EVM-080 board layout as proven starting points.
The TPS23758 is a Type 1 (13 W) PoE PD solution. Estimated: at 13 W output and an assumed 85% flyback efficiency, input power is roughly 15.3 W, so verify the upstream PSE budget and cabling accordingly. Because regulation uses primary-side sensing, transformer selection (turns ratio, leakage inductance, magnetizing inductance tolerance) directly determines output accuracy - specify a transformer matched to the EVM-080 recommendation or have the vendor qualify it for PSR operation. Do not attempt output currents beyond the Type 1 class without redesigning around a higher-class PD device.
Spread spectrum frequency dithering (SSFD) lowers conducted-emission peaks, but PoE ports still need common-mode filtering and isolation to meet system requirements. Include a snubber across the transformer primary to damp leakage-inductance ringing at the drain node, and keep the Ethernet magnetics' isolation barrier clean from switching-node contamination. Estimated: dithering typically spreads each harmonic over several percent of bandwidth, reducing peak emissions by several dB - measure conducted emissions early in development rather than after layout freeze.
Do not treat family members as blind swaps: TPS23754/TPS23755/TPS23757 share the 24-VSON package but differ in power class and configuration details. Verify pinout and classification behavior against each datasheet before substitution. Also note that secondary-side output accuracy in PSR designs depends on transformer parasitics - a low-cost transformer substitution can shift the regulated output by hundreds of millivolts. Finally, the RJJT and RJJR suffixes denote different packing quantities, not electrical differences; order accordingly.
コンプライアンス情報
Compliance data was not present in the provided web data. TI product pages typically report RoHS/green status per package - verify on ti.com before procurement.
