TPS23882RTQT - 8-Ch Type-3 PoE PSE Controller | TI
料号： TPS23882RTQT ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $8.77 | $8.77 |
| 10 | $8.2 | $82.00 |
| 100 | $7.45 | $745.00 |
| 500 | $6.85 | $3,425.00 |
| 1,000 | $6.3 | $6,300.00 |
TPS23882RTQT 概述
A PoE PSE controller is a power management IC that sits at the switch or injector side of an Ethernet link. It performs powered-device detection, classification, mutual identification, and controlled power application per the IEEE 802.3 power-over-Ethernet specifications, protecting both the cable plant and the PD from faults such as overcurrent and inrush events.
Key features include 8 independent PoE channels for 2-pair power delivery, IEEE 802.3bt Type-3 compliance, on-chip SRAM for firmware and configuration flexibility, and reduced 200 mOhm sense resistors that lower power dissipation versus earlier generation designs. The TPS23882 improves on the TPS2388 with these lower sense resistance values and SRAM programmability, simplifying thermal design in high-density switches.
Architecturally, the device integrates detection and classification engines per port, I2C and autonomy-mode operation, port remapping, and protection features including overcurrent, overload, and short-circuit handling. Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices enable interchangeable 2-layer PCB designs across different system PoE power configurations, easing migration from previous generation PSE designs.
Typical applications include enterprise PoE switch line cards, midspan injectors, campus and industrial network infrastructure, and wireless access point powering systems where multiple 802.3bt-capable ports are required in a compact footprint.
A key design consideration is sizing the external hot-swap MOSFETs and sense resistors for the per-port current class, and providing adequate copper area under the VQFN exposed pad for thermal dissipation at full 8-port load.
This page synthesizes distributor pricing, pin-compatible family alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TPS23882RTQT ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TPS23882RTQT （相同外形与封装尺寸） ——差异在于 Host Interface, Number of Channels, Package, Product Type.
快速对比工具——选择替代料号进行并排对比：
TPS2388RTQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS23880RTQR
✅ 直接替换📋 参考替代料（不在目录中）
TPS23881RTQR
✅ 直接替换✓ 有现货
$6.05 / 个
查看数据手册 →TPS23882RTQT 规格参数
| Product Type | 8-channel PoE PSE Controller |
| PoE Standard Support | IEEE 802.3bt (Type-3), 802.3at (PoE+), 802.3af (PoE) |
| Number of Channels | 8 |
| Power Delivery Topology | 2-pair |
| Current Sense Resistance | 200 mOhm |
| On-chip Memory | SRAM |
| Host Interface | I2C / Autonomy mode |
| 封装 | 56-VQFN (8x8 mm) |
| 安装类型 | Surface Mount |
| Pin-to-Pin Compatible Family | TPS2388, TPS23880, TPS23881 |
| Detection | PD detection and classification per IEEE 802.3bt |
| Mutual Identification | Yes (LLDP-based per 802.3bt) |
| Port Remapping | Yes |
| Protection Features | Overcurrent, overload, short circuit, inrush control |
| Typical Applications | PoE switches, midspans, injectors |
TPS23882RTQT 56-vqfn (8x8 mm) 引脚配置指南
TPS23882RTQT（56-vqfn (8x8 mm) 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TPS23882RTQT.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TPS23882RTQT 适用于 6 应用s: Enterprise PoE Switch Line Cards, Midspan PoE Injectors, Campus and Industrial Network Infrastructure, Wireless Access Point Powering Systems, IP Security Camera and NVR Systems, LED Lighting and Smart Building PoE Networks.
Enterprise PoE Switch Line Cards
The TPS23882RTQT fits enterprise PoE switch line cards because it integrates 8 independent PSE channels in a single 8x8 mm VQFN, supporting IEEE 802.3bt Type-3 power while remaining backward compatible with 802.3at and 802.3af powered devices on the same card. Its 200 mOhm sense resistors lower per-channel I^2R losses versus the previous TPS2388 generation, which directly reduces heatsinking requirements on dense 24- and 48-port cards. In use, each port pairs the controller with an external hot-swap MOSFET and sense resistor; the controller performs detection, classification, and mutual identification autonomously or under I2C host control. The pin-to-pin family compatibility lets one 2-layer PCB serve multiple power tiers across a switch product family, cutting layout and qualification cost.
推荐
Midspan PoE Injectors
In midspan injector designs, the TPS23882RTQT provides the full PSE handshake chain - detection of a valid PD signature, classification, mutual identification per IEEE 802.3bt, and controlled power application - without disturbing data pairs, since it powers on the 2-pair spare pairs typical of midspan architectures. The 8-channel integration allows a single multi-port midspan box to be built around one controller, shrinking BOM count and board area versus discrete per-port solutions. The 200 mOhm sense resistance minimizes wasted power in continuous operation, which matters in fanless midspan enclosures. Designers should size external MOSFETs for the highest class offered and rely on the controller's overcurrent and short-circuit protection to handle faulty or mis-wired cable plants in field deployments.
推荐
Campus and Industrial Network Infrastructure
Campus and industrial switches and injectors benefit from the TPS23882RTQT's IEEE 802.3bt Type-3 compliance, which delivers higher power per port needed by PTZ cameras, wireless access points, and building-automation endpoints, while its 802.3af/at backward compatibility keeps legacy devices on the same infrastructure. Industrial environments add electrical stress - long cable runs, noisy grounds, and fault-prone connectors - and the controller's per-port overcurrent, overload, and inrush protection directly addresses those failure modes. The SRAM programmability allows configuration and firmware-based behavior tuning per deployment. Its 56-VQFN footprint with exposed pad needs solid ground copper for thermal relief when all 8 ports run near maximum class current continuously in sealed enclosures with limited airflow.
推荐
Wireless Access Point Powering Systems
Wireless access points drawing 802.3bt Type-3 power levels are typically fed from switch ports controlled by devices like the TPS23882RTQT. On the PSE side, the controller guarantees correct class negotiation and mutual identification so high-power APs receive their full allocation, and its protection circuitry shuts down safely on cable faults common in ceiling deployments. The 200 mOhm sense resistors keep per-port losses low across a chassis feeding dozens of APs, which reduces aggregate chassis power waste and heat. Using SRAM programmability, switch vendors can tune detection thresholds and timing per product line without external memory. Its family pin compatibility allows one switch board design to span PoE+ and 802.3bt SKUs by changing only the populated PSE controller variant.
推荐
IP Security Camera and NVR Systems
PoE security systems pair 802.3bt-powered cameras with network video recorders whose switch ports require a robust PSE controller such as the TPS23882RTQT. Type-3 power supports PTZ cameras with heaters and IR illuminators that exceed PoE+ budgets, while 802.3af/at compatibility covers fixed dome cameras on the same infrastructure. The controller's detection and classification prevent power application to non-standard or damaged devices, protecting cable plant and NVR backplanes. Its 200 mOhm sensing keeps losses low across 8-channel clusters typical of NVR integrated switches. In surveillance deployments with long outdoor cable runs, the per-port inrush and short-circuit protection of the TPS23882 is the primary defense against lightning-induced cable faults reaching the switch power budget.
推荐
LED Lighting and Smart Building PoE Networks
PoE-based smart lighting and building automation systems distribute DC power over structured cabling to LED luminaires, sensors, and HVAC controllers. The TPS23882RTQT serves as the PSE controller in the wiring-closet switch, and its 802.3bt Type-3 support supplies the higher per-port power that modern luminaires demand. SRAM programmability enables per-building configuration of port power limits and class enforcement without hardware changes. The 200 mOhm sense resistors reduce losses in systems running dozens of continuously powered ports, which is significant in a 24/7 lighting application. The pin-to-pin family compatibility (TPS2388, TPS23880, TPS23881) lets a building-systems vendor reuse a single switch PCB across standard and high-power lighting tiers, simplifying certification and spare-parts logistics.
推荐
推荐产品汇总
工程参考数据： TPS23882RTQT ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TPS2388RTQR | TPS23880RTQR | TPS23881RTQR |
|---|---|---|---|---|
| Package | 56-VQFN (8x8) | 56-VQFN (8x8) - same | 56-VQFN (8x8) - same | 56-VQFN (8x8) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Number of Channels | 8 | 8 | 8 | 8 |
| Pin Compatibility | TPS2388, TPS23880, TPS23881 (pin-to-pin, port remapping) | Pin-to-pin with TPS23882 | Pin-to-pin with TPS23882 | Pin-to-pin with TPS23882 |
关键差异点
- IEEE 802.3bt Type-3 support （对比 TPS2388RTQR)
- Reduced sense resistance lowers dissipation （对比 TPS2388RTQR)
- SRAM programmability （对比 TPS2388RTQR)
设计说明
The TPS23882's 200 mOhm sense resistors reduce per-port I^2R losses compared to the TPS2388 generation, but at full 802.3bt Type-3 current on all 8 ports, total board dissipation (controller sense resistors plus external hot-swap MOSFETs) remains substantial. Estimated: at 600 mA per port and 200 mOhm, sense loss is about 0.072 W per channel, or roughly 0.58 W for 8 channels before MOSFET conduction losses. Provide continuous copper pour under the VQFN exposed pad connected to a ground plane, and verify junction temperature against the datasheet limits at worst-case class and ambient.
Per TI, the TPS23882 is pin-to-pin compatible with TPS2388, TPS23880, and TPS23881, enabling interchangeable 2-layer PCB designs across PoE power tiers. Exploit this by laying out the board once with footprints and port remapping logic that accommodate all four variants. Place the sense resistors and hot-swap MOSFETs close to the port connectors with short, wide power traces, and keep the I2C bus routed away from high-current PoE paths to avoid noise coupling into the serial interface.
Do not assume sense resistor values from older TPS2388 designs carry over - the TPS23882 specifies 200 mOhm sense resistance, and reusing older, higher-value sense resistors both wastes power and may trip current-limit thresholds incorrectly. Also verify PoE type configuration: the TPS23882 supports 802.3bt Type-3, but if a board was designed around the Type-2 TPS2388, classification and mutual-identification sequencing must be re-validated at Type-3 power levels, including PD inrush behavior with high-capacitance loads.
合规信息
Compliance status was not stated in the verified web data for this exact ordering part number. Verify RoHS/REACH/MSL status on the TI product page 'Ordering and quality' table for TPS23882RTQT.
