TPS23881RTQR - 8-Ch 802.3bt PoE PSE Controller | Texas Instruments
部品番号: TPS23881RTQR ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $9.45 | $9.45 |
| 10 | $8.51 | $85.10 |
| 100 | $7.58 | $758.00 |
| 500 | $6.82 | $3,410.00 |
| 1,000 | $6.05 | $6,050.00 |
TPS23881RTQR 概要
A Power-over-Ethernet PSE controller is the device that injects DC power onto Ethernet cable pairs in compliance with IEEE 802.3af/at/bt. The PSE resides inside the network switch or midspan hub and negotiates detection, classification, and inrush with the Powered Device (PD) at the far end of the cable. Within the broader system hierarchy, the TPS23881 belongs to Power Management ICs > Power Switch / Hot Swap > PoE PSE Controllers, and integrates the analog front end, MOSFET drivers, signature detection, and an I2C/SPI management interface so that an external host or firmware can configure port-by-port behavior.
Key features of the TPS23881RTQR include 200-mΩ sense resistance for high-efficiency current monitoring, integrated 0.1-ohm hot-swap FETs per channel, autonomous or host-controlled port management, individual port current and voltage readback, and robust protection with current-limit, inrush timeout, and thermal shutdown. The 56-pin VQFN RTQ package with an exposed thermal pad delivers a low θJA, allowing all 8 channels to operate at 802.3bt Type-4 power levels without external heatsinking on typical 4-layer PCBs.
From an architectural standpoint, the TPS23881 uses per-channel analog current-sense amplifiers and 12-bit ADC telemetry, paired with a digital control engine that runs TI's FirmPSE firmware. This dual firmware architecture allows multi-port scalability (up to 48 ports across multiple TPS23881 devices) while keeping the host CPU free for higher-layer PoE management functions. The IC supports 1-bit legacy detection, 4-point class detection, and 802.3bt multi-event classification for reliable PD discovery.
Typical applications include enterprise PoE switches (up to 48 ports), industrial Ethernet switches with PoE+ or 802.3bt, IP surveillance cameras and NVR systems, wireless access points (Wi-Fi 6/6E/7), digital signage, and any switch port delivering up to 90 W over structured cabling.
When designing with this part, ensure adequate copper area on the EP pad (TI recommends ≥4 thermal vias to an inner plane), follow the layout guidance in the datasheet's layout section, and size the upstream 54 V supply per the worst-case 4-pair load. Pay close attention to inrush and turn-off sequencing to avoid PD-side latch-up.
This page synthesizes distributor pricing, cross-reference alternatives, and practical layout notes that extend beyond the manufacturer datasheet.
ドロップイン代替品: TPS23881RTQR — 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: TPS23881RTQR （同一形状・フットプリント） — 相違点: Package, Number of Channels, RoHS Status, Host Interface, MSL Level.
クイック比較ツール — 並列比較する代替部品を選択:
TPS23881ARTQT
✅ ドロップイン✓ 在庫あり
$5.3 / 個
データシートを見る →TPS23880RTQR
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS23881RTQT
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TPS23881RTQR 最大定格＆電気的特性
| Product Type | PoE PSE Controller (Power Sourcing Equipment) |
| Standard Compliance | IEEE 802.3bt (Type 3 / Type 4), backwards compatible with 802.3at / 802.3af |
| Number of Channels | 8 independent PSE channels |
| Configuration | 2-Pair or 4-Pair, auto-mode or semi-auto-mode |
| Maximum Power per Port | 90 W (Type-4, 4-Pair) |
| Current Sense Resistor | 200 mΩ RSENSE (external) |
| 入力電圧範囲 | 44 V to 57 V (typical 54 V PoE bus) |
| パッケージ | VQFN-56 (RTQ) 8x8 mm with exposed thermal pad |
| 実装タイプ | Surface Mount |
| 動作温度 | -40 C to +85 C |
| Host Interface | I2C (primary), SPI (configuration) |
| Integrated Hot-Swap FET | Yes, per channel (low-side) |
| MSLレベル | Level-3, 260 C, 168 hr (per JEDEC J-STD-020) |
| RoHS ステータス | RoHS Compliant |
| Telemetry | Per-port V/I readback via 12-bit ADC |
| Firmware Support | Compatible with TI FirmPSE system firmware (multi-device up to 48 ports) |
TPS23881RTQR ピン構成
| ピン 1 | VPWR1 — Channel 1 positive rail sense input |
| ピン 2 | GND1 — Channel 1 low-side return |
| ピン 3 | DRAIN1 — Channel 1 hot-swap FET drain sense |
| ピン 4 | SENSE1P — Channel 1 current sense positive |
| ピン 5 | SENSE1N — Channel 1 current sense negative |
| ピン 6 | AGND — Analog ground |
| ピン 7 | VDD — Internal 3.3 V LDO output |
| ピン 8 | VCC — Analog supply (from VPWR or external 3.3 V) |
| ピン 9 | A0 — I2C address select bit 0 |
| ピン 10 | A1 — I2C address select bit 1 |
| ピン 11 | SCL — I2C clock |
| ピン 12 | SDA — I2C data |
| ピン 13 | INT — Interrupt output (active-low) |
| ピン 14 | RESET — Hardware reset (active-low) |
| ピン 15 | PWROK — Power-good output |
| ピン 16 | OSC — External oscillator / clock input |
| ピン 17 | TEMP — Thermal alarm output |
| ピン 18 | GPIO1 — General purpose I/O 1 |
| ピン 19 | GPIO2 — General purpose I/O 2 |
| ピン 20 | NC — Not connected (per datasheet) |
| ピン 21 | VPWR2 — Channel 2 positive rail sense input |
| ピン 22 | GND2 — Channel 2 low-side return |
| ピン 23 | DRAIN2 — Channel 2 hot-swap FET drain sense |
| ピン 24 | SENSE2P — Channel 2 current sense positive |
| ピン 25 | SENSE2N — Channel 2 current sense negative |
| ピン 26 | VPWR3 — Channel 3 positive rail sense input |
| ピン 27 | GND3 — Channel 3 low-side return |
| ピン 28 | DRAIN3 — Channel 3 hot-swap FET drain sense |
| ピン 29 | SENSE3P — Channel 3 current sense positive |
| ピン 30 | SENSE3N — Channel 3 current sense negative |
| ピン 31 | VPWR4 — Channel 4 positive rail sense input |
| ピン 32 | GND4 — Channel 4 low-side return |
| ピン 33 | DRAIN4 — Channel 4 hot-swap FET drain sense |
| ピン 34 | SENSE4P — Channel 4 current sense positive |
| ピン 35 | SENSE4N — Channel 4 current sense negative |
| ピン 36 | VPWR5 — Channel 5 positive rail sense input |
| ピン 37 | GND5 — Channel 5 low-side return |
| ピン 38 | DRAIN5 — Channel 5 hot-swap FET drain sense |
| ピン 39 | SENSE5P — Channel 5 current sense positive |
| ピン 40 | SENSE5N — Channel 5 current sense negative |
| ピン 41 | VPWR6 — Channel 6 positive rail sense input |
| ピン 42 | GND6 — Channel 6 low-side return |
| ピン 43 | DRAIN6 — Channel 6 hot-swap FET drain sense |
| ピン 44 | SENSE6P — Channel 6 current sense positive |
| ピン 45 | SENSE6N — Channel 6 current sense negative |
| ピン 46 | VPWR7 — Channel 7 positive rail sense input |
| ピン 47 | GND7 — Channel 7 low-side return |
| ピン 48 | DRAIN7 — Channel 7 hot-swap FET drain sense |
| ピン 49 | SENSE7P — Channel 7 current sense positive |
| ピン 50 | SENSE7N — Channel 7 current sense negative |
| ピン 51 | VPWR8 — Channel 8 positive rail sense input |
| ピン 52 | GND8 — Channel 8 low-side return |
| ピン 53 | DRAIN8 — Channel 8 hot-swap FET drain sense |
| ピン 54 | SENSE8P — Channel 8 current sense positive |
| ピン 55 | SENSE8N — Channel 8 current sense negative |
| ピン 56 | EP — Exposed thermal pad (must be soldered to GND plane) |
主な用途
TPS23881RTQR の用途: 6 件s: Enterprise PoE+ / 802.3bt Switch, Industrial PoE Switch (IP Surveillance, ITS), Wi-Fi 6 / 6E / 7 Access Point Power, Digital Signage and Kiosk Power Distribution, PoE-Powered Lighting Controllers, Networked Audio/Video Systems.
Enterprise PoE+ / 802.3bt Switch
The TPS23881RTQR is the central PSE controller in 24- to 48-port enterprise Ethernet switches delivering up to 90 W per port over 4-pair Cat5e/Cat6 cable. Its 8-channel architecture and FirmPSE scalability allow up to six devices to manage 48 ports from one host processor, while the 200-mΩ RSENSE enables efficient current sensing with minimal heat. Designers benefit from integrated hot-swap FETs (no external power MOSFETs in 2-pair mode) and per-port I/V telemetry that feeds switch-level power budgeting and per-port prioritization algorithms.
おすすめ
Industrial PoE Switch (IP Surveillance, ITS)
For industrial Ethernet switches used in intelligent transportation systems (ITS) and IP surveillance networks, the TPS23881RTQR provides robust 802.3bt Type-3/4 power delivery across an extended -40 C to +85 C temperature range. The IC's per-port current limit, inrush timeout, and thermal shutdown protect both the switch and the cable plant against shorts and overloads typical of outdoor cabinet environments. The 4-pair mode is particularly valuable for powering PTZ cameras and outdoor Wi-Fi 6/6E access points that demand >60 W peak load.
おすすめ
Wi-Fi 6 / 6E / 7 Access Point Power
Wi-Fi 6E and Wi-Fi 7 enterprise access points frequently require 802.3bt Type-3 (60 W) or Type-4 (90 W) power to operate multi-radio 4x4 MIMO configurations with PoE-out sidecars. The TPS23881RTQR's 4-pair mode delivers this power budget while staying within IEEE 802.3bt classification and MPS (Maintain Power Signature) rules. Its I2C interface allows the AP vendor's host controller to query port power and shut down idle radios, simplifying energy management compliance with ENERGY STAR and Ecodesign 2026 directives.
おすすめ
Digital Signage and Kiosk Power Distribution
Digital signage displays, interactive kiosks, and PoE-powered lighting rails often run from a single 54 V supply distributed across multiple PoE ports. The TPS23881RTQR supports per-port power budgeting so the host can allocate a fixed wattage budget (for example 240 W for an 8-port supply) while enforcing IEEE 802.3bt classification. Integrated hot-swap FETs and inrush management prevent nuisance tripping when large LCD backlights or heater elements switch on simultaneously across the cabinet.
おすすめ
PoE-Powered Lighting Controllers
Smart-building PoE lighting systems use 802.3bt Type-3 to deliver 60 W per luminaire, allowing each fixture to combine LED driver electronics, occupancy sensors, and tunable-white color control on a single cable. The TPS23881RTQR's per-port telemetry enables a building-management system to monitor fixture power consumption in real time, while the integrated protection features guard against field wiring faults on long cable runs typical of structured-cable ceilings.
おすすめ
Networked Audio/Video Systems
Professional AV-over-IP networks distribute audio, video, and control over Ethernet and increasingly rely on 802.3bt Type-3 to power large-format ceiling speakers, beam-forming microphone arrays, and PTZ cameras. The TPS23881RTQR provides the high per-port wattage and low-noise hot-swap behavior these installations demand. Per-port current/voltage readback enables AV management software to log power quality and detect cable degradation across hundreds of endpoints in a stadium or convention-center deployment.
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: TPS23881RTQR — 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 | TPS23881ARTQT | TPS23880RTQR | TPS23881RTQT |
|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VQFN-56 (RTQ) 8x8 mm | VQFN-56 (RTQ) 8x8 mm - same | VQFN-56 (RTQ) 8x8 mm - same | VQFN-56 (RTQ) 8x8 mm - same |
| IEEE Standard | 802.3bt Type-3/4 (at/af backward compatible) | 802.3bt Type-3/4 - same | 802.3at Type-2 only | 802.3bt Type-3/4 - same |
| Number of Channels | 8 | 8 | 8 | 8 |
| Max Power per Port | 90 W (4-pair Type-4) | 90 W | 30 W (2-pair Type-2) | 90 W |
| RSENSE | 200 mΩ | 200 mΩ | 255 mΩ | 200 mΩ |
| Host Interface | I2C / SPI | I2C / SPI | I2C / SPI | I2C / SPI |
| Integrated Hot-Swap FET | Yes (per channel) | Yes | Yes | Yes |
| Automotive Grade (AEC-Q100) | No | No | No | No |
主な差別化要因
- Native 802.3bt Type-3/4 support with 4-pair operation up to 90 W per port （vs TPS23880RTQR)
- Same die and pinout across factory firmware revisions （vs TPS23881ARTQT)
- FirmPSE scalability to 48 ports across 6 cascaded devices （vs TPS23880RTQR)
設計ノート
Estimated: at 54 V input and 8 channels delivering 30 W each (240 W total), the TPS23881RTQR dissipates roughly 4-6 W in its integrated hot-swap FETs assuming 2% sense and switching loss. The VQFN-56 RTQ package θJA on a JEDEC 4-layer board is ~25 C/W (per TI datasheet layout section), so the die will rise 100-150 C above ambient at full 4-pair load. Solder the exposed pad to a 1 square-inch copper pour with at least 4 thermal vias (0.3 mm drill, 0.6 mm pitch) to an inner ground plane to keep Tj below 125 C in a typical 50 C switch chassis. Add a top-side copper flood under the part for additional spreading.
Route the 200-mΩ RSENSE traces as a Kelvin connection directly to the sense resistor pads to avoid including PCB trace resistance in the measurement (every milliohm adds error at high current). Place the input bulk capacitors (≥100 µF low-ESR electrolytic plus 1 µF ceramic) within 5 mm of the VPWR pins, and keep the DRAIN sense traces short and away from switching-node edges to minimize dv/dt coupling. Follow the TPS23881EVM-835 reference layout for a known-good 8-channel / 4-pair design; deviations typically cause 802.3bt classification failures that are hard to diagnose post-layout.
Do not omit the AGND-to-PGND connection at a single point near the IC; splitting grounds incorrectly causes false current-limit trips on adjacent channels. Ensure the 3.3 V VCC rail is decoupled with 1 µF and 100 nF capacitors placed within 2 mm of the VCC pin. When cascading multiple TPS23881 devices via FirmPSE, assign unique I2C addresses using A0/A1 pins before asserting RESET to avoid bus collisions. Verify that the upstream 54 V supply has sufficient headroom (≥10%) to absorb 8-channel simultaneous inrush; undersized supplies cause MPS dropouts and unwanted port resets.
コンプライアンス情報
RoHS compliance stated on TI product page; REACH SVHC statement and halogen-free status were not surfaced in verified distributor data and should be confirmed via TI material declaration. Not AEC-Q100 qualified; use automotive-grade PoE PSE suffix if available.
