TPS23881ARTQT - 8-Ch 4-Pair Type-4 PoE PSE | Texas Instruments
MPN: TPS23881ARTQT ✓ Hoạt độngTPS23881ARTQT Tóm tắt
A Power-over-Ethernet PSE controller is a specialized mixed-signal IC that sits inside an Ethernet switch, midspan, or PoE injector and safely delivers DC power over the twisted-pair cabling to a Powered Device (PD) such as a wireless AP, IP camera, or lighting fixture. In the broader hierarchy, the TPS23881ARTQT is a PoE controller -> power management IC -> power switch IC -> interface IC -> semiconductor, enabling compliance with the IEEE 802.3bt (formerly 802.3at/at+bt) standard.
Key features include support for 4-pair Type-3/Type-4 operation delivering up to 90 W per port, 200 mΩ current-sense resistors per pair for accurate current monitoring, integrated 0.5 Ω MOSFET gate drivers, I2C programmability with 16 addresses, autonomous semi-auto and manual modes, comprehensive per-port telemetry (voltage, current, temperature), and legacy PD detection. The 200 mΩ RSENSE significantly reduces power dissipation versus the 0.5 Ω external FET architectures used in older PSE designs.
Architecturally, the TPS23881ARTQT integrates eight independent port controllers, each containing detection, classification (including 4-event classification for Type-3/4), inrush control, and disconnect monitoring. A precision bandgap reference and on-chip ADC support accurate current/voltage measurement. The device operates from a 44 V to 57 V supply (PoE nominal 48 V) and includes per-port thermal protection and current-limit foldback.
Typical applications include enterprise-class 802.3bt PoE++ switches, Wi-Fi 6/6E access points, PTZ IP cameras, PoE lighting controllers, 5G small-cell backhaul, and industrial PoE midspans. Pairing with TI's FirmPSE system firmware enables scalability to 48-port systems across multiple cascaded TPS23881 devices.
When designing with this device, ensure adequate bulk capacitance on the 48 V rail, observe 4-layer PCB layout recommendations for thermal management, and reserve I2C lines for multi-device addressing. The autonomous mode reduces firmware overhead for cost-sensitive designs while the I2C interface unlocks per-port telemetry in managed switches.
Bộ thay thế dễ dàng lắp đặt cho TPS23881ARTQT — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TPS23881ARTQT (cùng hình factor và footprint) — khác nhau ở MSL Level, Number of Channels, Operating Temperature, Package, RoHS Status.
TPS23881ARTQR
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS23882ARTQT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS23880ARTQT
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TPS23881RTQR
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TPS23881BTRTQT
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TPS23881ARTQT Tỷ lệ tối đa & tính chất điện
| Number of Channels | 8 |
| PoE Standard | IEEE 802.3bt Type-3 / Type-4, 802.3at (PoE+) |
| Number of Powered Pairs | 4-pair |
| Sense Resistor | 200 mΩ |
| Supply Voltage (VCC) | 44 V to 57 V (nominal 48 V) |
| Maximum Per-Port Power | 90 W (Type-4) |
| Control Interface | I2C (16 selectable addresses) |
| Modes | Autonomous / Semi-Auto / Manual |
| Current Limit Foldback | Yes (per-port) |
| Thermal Protection | Yes (per-port thermal shutdown) |
| Nhiệt độ hoạt động | -40 °C to +125 °C |
| Hộp | 56-pin VQFN (8x8 mm) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 3 (168 hours) |
| Trạng thái RoHS | Compliant |
Cấu hình chân TPS23881ARTQT
| Chân 1 | DRAIN1A — Port 1A drain sense input |
| Chân 2 | SENSE1A — Port 1A current sense (200 mΩ RSENSE) |
| Chân 3 | DRAIN1B — Port 1B drain sense input |
| Chân 4 | SENSE1B — Port 1B current sense (200 mΩ RSENSE) |
| Chân 5 | DRAIN2A — Port 2A drain sense input |
| Chân 6 | SENSE2A — Port 2A current sense (200 mΩ RSENSE) |
| Chân 7 | DRAIN2B — Port 2B drain sense input |
| Chân 8 | SENSE2B — Port 2B current sense (200 mΩ RSENSE) |
| Chân 9 | DRAIN3A — Port 3A drain sense input |
| Chân 10 | SENSE3A — Port 3A current sense (200 mΩ RSENSE) |
| Chân 11 | DRAIN3B — Port 3B drain sense input |
| Chân 12 | SENSE3B — Port 3B current sense (200 mΩ RSENSE) |
| Chân 13 | DRAIN4A — Port 4A drain sense input |
| Chân 14 | SENSE4A — Port 4A current sense (200 mΩ RSENSE) |
| Chân 15 | DRAIN4B — Port 4B drain sense input |
| Chân 16 | SENSE4B — Port 4B current sense (200 mΩ RSENSE) |
| Chân 17 | DRAIN5A — Port 5A drain sense input |
| Chân 18 | SENSE5A — Port 5A current sense (200 mΩ RSENSE) |
| Chân 19 | DRAIN5B — Port 5B drain sense input |
| Chân 20 | SENSE5B — Port 5B current sense (200 mΩ RSENSE) |
| Chân 21 | DRAIN6A — Port 6A drain sense input |
| Chân 22 | SENSE6A — Port 6A current sense (200 mΩ RSENSE) |
| Chân 23 | DRAIN6B — Port 6B drain sense input |
| Chân 24 | SENSE6B — Port 6B current sense (200 mΩ RSENSE) |
| Chân 25 | DRAIN7A — Port 7A drain sense input |
| Chân 26 | SENSE7A — Port 7A current sense (200 mΩ RSENSE) |
| Chân 27 | DRAIN7B — Port 7B drain sense input |
| Chân 28 | SENSE7B — Port 7B current sense (200 mΩ RSENSE) |
| Chân 29 | DRAIN8A — Port 8A drain sense input |
| Chân 30 | SENSE8A — Port 8A current sense (200 mΩ RSENSE) |
| Chân 31 | DRAIN8B — Port 8B drain sense input |
| Chân 32 | SENSE8B — Port 8B current sense (200 mΩ RSENSE) |
| Chân 33 | GATE1A — Port 1A gate drive for external MOSFET |
| Chân 34 | GATE1B — Port 1B gate drive for external MOSFET |
| Chân 35 | GATE2A — Port 2A gate drive for external MOSFET |
| Chân 36 | GATE2B — Port 2B gate drive for external MOSFET |
| Chân 37 | GATE3A — Port 3A gate drive for external MOSFET |
| Chân 38 | GATE3B — Port 3B gate drive for external MOSFET |
| Chân 39 | GATE4A — Port 4A gate drive for external MOSFET |
| Chân 40 | GATE4B — Port 4B gate drive for external MOSFET |
| Chân 41 | GATE5A — Port 5A gate drive for external MOSFET |
| Chân 42 | GATE5B — Port 5B gate drive for external MOSFET |
| Chân 43 | GATE6A — Port 6A gate drive for external MOSFET |
| Chân 44 | GATE6B — Port 6B gate drive for external MOSFET |
| Chân 45 | GATE7A — Port 7A gate drive for external MOSFET |
| Chân 46 | GATE7B — Port 7B gate drive for external MOSFET |
| Chân 47 | GATE8A — Port 8A gate drive for external MOSFET |
| Chân 48 | GATE8B — Port 8B gate drive for external MOSFET |
| Chân 49 | INT — I2C interrupt output (open-drain) |
| Chân 50 | SDA — I2C data |
| Chân 51 | SCL — I2C clock |
| Chân 52 | A0 — I2C address select bit 0 |
| Chân 53 | A1 — I2C address select bit 1 |
| Chân 54 | A2 — I2C address select bit 2 |
| Chân 55 | A3 — I2C address select bit 3 |
| Chân 56 | VCC — 48 V supply input (44-57 V) |
Ứng dụng tiêu biểu
TPS23881ARTQT phù hợp cho 6 Áp dụngs: Enterprise 802.3bt PoE++ Switches, Wi-Fi 6E / Wi-Fi 7 Access Point Power, PTZ IP Surveillance Cameras, PoE Lighting Controllers, 5G Small-Cell Backhaul & Picocells, Industrial PoE Midspans / Injectors.
Enterprise 802.3bt PoE++ Switches
The TPS23881ARTQT is engineered for managed enterprise switches delivering up to 90 W per port under IEEE 802.3bt Type-4. With 8 channels per IC and 16 I2C addresses, a single switch line card can scale to 48+ ports by cascading multiple TPS23881 devices over a shared I2C bus. Its 200 mΩ RSENSE minimizes per-port dissipation versus legacy 0.5 Ω designs, reducing heat in densely populated switch chassis. Per-port telemetry (V/I/T) feeds managed switch software for power budgeting across the entire 48-port system.
Được đề xuất
Wi-Fi 6E / Wi-Fi 7 Access Point Power
Wi-Fi 6E and emerging Wi-Fi 7 access points increasingly require 60-90 W PoE to power radios, antennas, and integrated small-cell radios. The TPS23881ARTQT supports Type-3 (60 W) and Type-4 (90 W) modes with 4-event classification, allowing APs to negotiate the exact power they need while keeping legacy 802.3at PDs running. The autonomous operation mode reduces host firmware overhead, ideal for ceiling-mounted APs with constrained firmware budgets. TI's FirmPSE library accelerates integration with common SoC host processors.
Được đề xuất
PTZ IP Surveillance Cameras
Pan-Tilt-Zoom IP cameras with heaters, IR illuminators, and motorized lenses routinely draw 40-71 W, beyond IEEE 802.3at 30 W. The TPS23881ARTQT's 4-pair Type-4 capability delivers the headroom PTZ cameras require while maintaining per-port telemetry for remote power diagnostics. Operating across -40°C to +125°C, the IC handles outdoor enclosure temperature swings. The 200 mΩ RSENSE reduces in-line power loss by ~60% versus discrete 0.5 Ω designs, easing thermal design in sealed outdoor housings.
Được đề xuất
PoE Lighting Controllers
Smart-building PoE lighting systems consolidate 48 V power and data over a single Category cable, simplifying installation. The TPS23881ARTQT's 8 independent channels power multiple lighting zones per controller IC, while per-port disconnect monitoring enables individual fixture control. Type-4 90 W output supports high-lumen LED fixtures with integrated color-tunable drivers. The I2C interface allows integration with BACnet/Modbus building automation gateways for scene-based lighting control.
Được đề xuất
5G Small-Cell Backhaul & Picocells
5G picocells and small-cell radios mounted on building ceilings or streetlights increasingly use PoE++ to avoid dedicated AC power. The TPS23881ARTQT delivers 90 W per port to power radios and their integrated antennas and heaters. Autonomous mode operation eliminates the need for a full PoE management processor, reducing BOM cost in space-constrained radio enclosures. Industrial -40°C to +125°C rating supports outdoor streetlight deployments.
Được đề xuất
Industrial PoE Midspans / Injectors
Industrial midspans inject PoE into existing Ethernet runs to retrofit factory floors, warehouses, and outdoor sites with PoE-capable devices. The TPS23881ARTQT's 8-channel density allows compact 8- to 16-port midspan designs in 1U form factors. The 4-pair Type-4 mode delivers 90 W to factory automation endpoints, while per-port current limiting and foldback protect against motor-startup transients common in industrial environments. TI's FirmPSE firmware handles the IEEE 802.3bt state machine without a host MCU.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TPS23881ARTQT — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | TPS23881ARTQR | TPS23882ARTQT | TPS23880ARTQT | TPS23881RTQR | TPS23881BTRTQT |
|---|---|---|---|---|---|---|
| Package | VQFN-56 (8x8 mm) | VQFN-56 (8x8 mm) - same | VQFN-56 (8x8 mm) - same | VQFN-56 (8x8 mm) - same | VQFN-56 (8x8 mm) - same | VQFN-56 (8x8 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Channels | 8 | 8 | 8 | 8 | 8 | 8 |
| PoE Type | Type-3 / Type-4 (90W) | Type-3 / Type-4 (90W) | Type-3 / Type-4 (90W) | Type-3 only (60W) | Type-3 / Type-4 (90W) | Type-3 / Type-4 (90W) |
| Sense Resistor | 200 mΩ | 200 mΩ | 200 mΩ | 200 mΩ | 200 mΩ | 200 mΩ |
| USB-C PD Support | No | No | Yes | No | No | No |
| Operating Temperature | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C | -40°C to +125°C |
| Reel Orientation | T (T1) | R | T (T1) | T (T1) | R | T (T1) |
Bảo phân biệt quan trọng
- Pin-compatible upgrade path with USB-C PD (vsTPS23882ARTQT)
- 200 mΩ RSENSE cuts per-port loss by ~60% (vsTPS23880ARTQT)
- 16 I2C addresses enable 48-port scalability (vsTPS23881ARTQR)
Ghi chú thiết kế
Estimated: at 8 ports × 90 W per port, total system dissipation is roughly 24 W (assuming 2.5% conversion loss). The 56-pin VQFN has a theta_JA of approximately 28 °C/W on a 4-layer JEDEC PCB, yielding a 19 °C rise per watt of power lost. Place the exposed pad on a 1 square-inch copper pour with 12 thermal vias (0.3 mm drill, 1 mm pitch) to keep junction temperature below 125 °C in fully loaded 8-port operation.
Place VCC bulk capacitor (≥10 µF ceramic + 100 µF electrolytic) within 5 mm of the VCC pin. Keep the analog ground (DGND) island isolated from power ground except at the EPAD stitch point. The 200 mΩ RSENSE traces should be 4-wire Kelvin-connected to the SENSE pins to avoid IR-drop error. Route the 16 SENSE lines as short, matched differential pairs to minimize inductance during inrush.
Do not exceed the 57 V absolute maximum on VCC - surges from hot-swap transients can latch-up the charge pump. Per the TI datasheet, add a 58 V TVS (SMBJ58A) on VCC for transient suppression. The I2C lines require 4.7 kΩ pull-ups to a 3.3 V rail; using 5 V pull-ups will exceed the SDA/SCL absolute maximum ratings. Always read the INT pin in the host ISR to avoid missed fault events.
Maintain 100 mil keep-out under the EPAD for thermal via stitching. Use 1 oz copper on inner layers with 2 oz top copper for power distribution. The GATE drive traces should be 20 mil wide and shorter than 25 mm to prevent MOSFET turn-on ringing. Reference the TI TPS23881EVM User's Guide PCB layout for an 8-port reference design with 4-layer stack-up.
Thông tin tuân thủ
RoHS compliant per TI product page. Not AEC-Q100 qualified - choose TPS23881 automotive grade for vehicle applications. Industrial -40°C to +125°C rating supports non-automotive rugged environments.
