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TPS2370PWG4 - IEEE 802.3af PoE PD Power Interface Switch | TI
The Texas Instruments TPS2370PWG4 is an IEEE 802.3af-compliant Power-over-Ethernet (PoE) Powered Device (PD) interface switch integrating detection, classification, inrush current limiting, and a 0.3-ohm internal pass FET in a single 8-pin TSSOP package. It operates across the standard 48V PoE supply rail, performs the four-quadrant detection signature required by IEEE 802.3af, and delivers up to 13 W of available PD power through a programmable inrush current limit rather than relying solely on the 400 mA / 50 ms default limit. A Power-over-Ethernet PD controller is a specialized power management IC that sits between an Ethernet RJ-45 connector and a downstream DC-DC converter, presenting the standardized 25 kohm detection signature, the 4-step classification current, and the inrush/turn-on behavior mandated by IEEE 802.3af. In the broader taxonomy, the TPS2370 sits under Power Management IC -> Hot Swap / Power Interface Switch -> PoE PD Controller. It off-loads the thermal stress of the hot-swap FET to an internal MOSFET while exposing only a few pins to the system designer. Key features include the integrated 0.3-ohm MOSFET that eliminates an external switch, a programmable inrush current limit that lifts the ~180 uF cap-size restriction of the bare IEEE 802.3af timing, open-drain PG (power good) and PG_OFF flags for sequencing downstream converters, and an adjustable UVLO for non-standard PoE inputs. The TSSOP-8 footprint keeps the solution under 5 x 7 mm of board area, which is important for compact IP phones, wireless access points, and small surveillance cameras. Architecturally the TPS2370 combines a precision 25 kohm detection resistor network (internal), a class-current reference, a gate-charge-pumped 100 V-rated internal MOSFET, and a thermal shutdown block. Compared with discrete implementations using a hot-swap controller plus a FET plus a sense resistor, the integration reduces BOM cost by typically three parts and improves accuracy because the detection signature tracks the internal FET's on-resistance instead of an external resistor pair. Typical applications include IP phones, wireless access points, IP security cameras, IoT gateways, and any 802.3af-powered sensor or access device where a single Ethernet cable must supply both data and power. The device is also widely used as a front-end for non-PoE products that benefit from the integrated inrush and isolation coordination. When designing with the TPS2370PWG4, treat VDD-VSS as the PoE input rail directly and place the input capacitance close to those pins; downstream of the TPS2370 the rail goes to a DC-DC converter that produces the final logic voltage. The PG output can be used to enable the downstream converter only after the bulk capacitor has fully charged, eliminating the start-up overshoot common to PoE loads. This page synthesizes distributor pricing, drop-in alternatives, PoE compliance design notes, and pin-level sequencing guidance not collected in a single place in the manufacturer datasheet, giving design and procurement engineers a one-pass reference.
TPS2370PWR - IEEE 802.3af PoE PD Interface Switch | Texas Instruments
The Texas Instruments TPS2370PWR is an IEEE 802.3af Power Interface Switch for Power-over-Ethernet (PoE) Powered Devices (PD), integrating detection, classification, inrush current limiting and pass-FET control in an 8-pin TSSOP (PW) package. The part implements the physical-layer PD interface between the Ethernet RJ-45 and the downstream DC-DC converter, supporting the full 802.3af handshake with an internal 0.3-ohm low-side N-channel FET and a 100 V abs-max VPD input rating. A PoE Powered Device Controller is a specialized interface IC that sits between the Power Sourcing Equipment (PSE) on the Ethernet switch and the application load. It performs the signature resistance, power classification (Class 0-4) and inrush-limited hot-swap turn-on mandated by IEEE 802.3af, then hands a regulated bulk rail to a downstream DC-DC converter. Within the broader Power-over-Ethernet taxonomy, the TPS2370PWR belongs to the PD controller category, which complements PSE controllers and DC-DC converters to form a complete PoE end-to-end solution. Key features include 0.3-ohm internal FET on-resistance for low conduction loss, 100 V maximum input voltage on VPD for surge margin, integrated IEEE 802.3af detection signature (24.9 kohm) and classification current sourcing, programmable inrush current limiting via an external gate capacitor, and a complementary open-drain PG (power-good) output for sequencing the downstream converter. Above 20 V input the classification current is shut off to reduce internal dissipation, and an internal undervoltage lockout prevents turn-on below the 802.3af minimum operate voltage. The architecture combines a precision bandgap reference, current-mode signature generation and a gated low-side MOSFET driver. By driving only the return-side FET, the TPS2370PWR allows the upstream PSE to maintain the PoE pair-to-pair voltage regardless of PD load transients. The 8-pin TSSOP body keeps the thermal path short, and the device is rated for the industrial -40C to +85C operating range required for outdoor and industrial Power-over-Ethernet endpoints. Typical applications include VoIP telephones, wireless LAN access points, IP security cameras, IoT gateways and industrial sensors that draw their power from the Ethernet cable rather than a separate wall adapter. Placing the TPS2370PWR upstream of a wide-input DC-DC converter is the canonical architecture for any 802.3af-compliant PD. When designing with this part, ensure the inrush gate capacitor is sized for the downstream bulk capacitance to keep inrush current within the 802.3af limit, and verify the transformer bridge is 802.3af compliant with the required center-tap connection. A TVS diode on VPD is strongly recommended for surge robustness above the 100 V abs-max. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical PoE design notes not found on a single manufacturer page.
TPS2371PW - PoE PD Power Interface Switch, IEEE 802.3af | TI
The Texas Instruments TPS2371PW is a legacy/IEEE 802.3af-compatible Power-over-Ethernet (PoE) Powered Device (PD) power interface switch, integrating the input detection, classification, and inrush control functions required by the 802.3af standard. It packages a 100 V-rated internal low-side pass FET (return-side switch) in an 8-pin TSSOP (PW) footprint. A PoE PD interface controller is a specialized power management IC that handles the negotiation and power-path startup between a Power Sourcing Equipment (PSE) and a powered load. The TPS2371 sits between the Ethernet RJ-45 magnetics and the DC-DC converter that follows it, performing signature detection (25 kΩ resistor presentation), classification (one of Class 0-4 current signatures), and inrush-limited turn-on of the bulk input capacitor. This functional block sits within the broader power management IC hierarchy, which includes voltage regulators, supervisors, and DC-DC converters. Key features include 100 V absolute maximum input voltage on the VDD pin, programmable inrush current limiting via an external resistor, automatic classification current shutoff above 20 V to reduce internal dissipation, and support for both current- and voltage-mode classification schemes. The internal N-channel FET has a typical on-resistance of 1 Ω and supports continuous currents up to 0.5 A at the return side, with transient capability to 1.5 A. The TPS2371 is designed to operate from a single twisted-pair or 4-pair Ethernet input. The low-side (return-side) topology allows the upstream DC-DC converter to use a non-isolated buck or a flyback configuration tied to chassis ground. Internal protection includes thermal shutdown, input undervoltage lockout, and a 100 V surge-tolerant drain connection. Typical applications include 802.3af-compliant PoE PD endpoints such as wireless access points, VoIP phones, IP cameras, IoT sensors, and low-power industrial Ethernet nodes. Designers benefit from a reduced BOM by eliminating external pass-MOSFETs and discrete signature resistors, while the TSSOP-8 package supports automated assembly. When designing with this part, ensure the upstream Ethernet physical layer (PHY) magnetics provide the proper center-tap injection point to the VDD pin, and verify that the downstream DC-DC startup current draw does not exceed the configured inrush limit. The 8-pin TSSOP (PW) is a thermally enhanced package but still requires adequate copper pour for sustained high-current operation.
TPS2371PWR - Legacy PoE Power Interface Switch | TI
The Texas Instruments TPS2371PWR is a legacy IEEE 802.3af-compatible power interface switch for Power over Ethernet powered devices, with programmable inrush current limiting and an 8-pin TSSOP package. It is designed for PoE PD applications requiring controlled power admission, input protection, and startup behavior. A power interface switch is an integrated semiconductor that sits between a PoE source and the powered equipment. It controls how power is applied to the downstream circuit, helping prevent excessive startup current, protecting source equipment, and defining the operating conditions seen by the load. In the broader power-management hierarchy, this device belongs to the PoE interface-switch and power-management IC category rather than a conventional voltage regulator. The verified manufacturer information identifies the TPS2371 as a legacy IEEE 802.3af-compatible power interface switch for PoE PDs. The datasheet search result also states that IEEE 802.3af permits an inrush current of 400 mA for 50 ms, limiting the load capacitor to approximately 180 µF. The programmable inrush current limit removes that restriction and permits a larger capacitor with lower startup current. The key design trade-off is between fast startup and controlled power admission. A lower programmed inrush limit can reduce stress on the PoE source and downstream components but may lengthen startup, while a higher limit can start a larger load more quickly but places greater transient demand on the source. The device is intended to simplify legacy PoE PD power-interface designs while preserving the external 8-TSSOP footprint. Typical applications include legacy PoE powered devices, powered Ethernet endpoints, IP cameras, VoIP phones, access-point equipment, and other IEEE 802.3af-compatible PDs. The part should be selected only after checking the source's PoE classification, available power, startup timing, protection requirements, and downstream capacitance against the complete manufacturer datasheet. For implementation, follow the manufacturer application guidance for input capacitance, current-limit programming, surge protection, layout, and exposed-pad or thermal requirements where applicable. Do not infer ratings, thresholds, or timing values from distributor descriptions alone; verify them in the official TPS2371 datasheet before releasing a production design. This page consolidates verified manufacturer and distributor descriptions, separates documented facts from unavailable parameters, and provides engineering guidance for comparing this legacy PoE interface switch with possible replacements.
TPS2372-3RGWT - 802.3bt PoE PD Controller 60W | Texas Instruments
The Texas Instruments TPS2372-3RGWT is an IEEE 802.3at and IEEE 802.3bt high-power Power over Ethernet (PoE) powered device (PD) interface controller supporting up to 60 W (Type 3) in a 20-pin VQFN (RGW) 5x5 mm package. A PoE PD interface controller is the front-end power management IC that resides in the powered device of a PoE system. It performs detection, classification, inrush current limiting, and disconnect identification, then hands off power to an isolated or non-isolated DC-DC converter. It sits at the top of the PoE power hierarchy: PoE PD controller -> PoE power interface IC -> power management IC -> semiconductor. Key features include support for IEEE 802.3at (Type 2) and IEEE 802.3bt (Type 1-4) classes, Automatic MPS (Maintain Power Signature) that reduces standby power in battery-backed applications, and Autoclass that enables downstream converters to lower power losses. Protection circuits cover undervoltage lockout, overcurrent, and thermal shutdown. PGOOD status indication allows clean sequencing of the downstream converter. The TPS2372-3 variant is optimized for 60 W applications with low internal switch resistance, while the TPS2372-4 variant supports up to 90 W Type 4 designs. According to the Texas Instruments product page, the TPS2372 family contains all features needed to implement an IEEE 802.3at or 802.3bt (draft) Type 1-4 powered device. Detection and classification compliance ensures interoperability with all standard PSE (power sourcing equipment) vendors. Typical applications include LED lighting fixtures, IP security cameras, wireless access points, 5G small cells, VoIP telephones, and network switches. Its wide input tolerance (0 V to 57 V per distributor data) and integrated pass transistor reduce bill-of-materials count versus discrete MOSFET solutions. For design, budget the inrush current limit against downstream converter input capacitance, and use the PGOOD output to enable the converter only after PoE handshake completes. This page adds distributor pricing, drop-in alternatives, and practical design notes beyond the manufacturer datasheet.
TPS2372-4RGWR - 90W 802.3bt PoE PD Controller | TI
The Texas Instruments TPS2372-4RGWR is an IEEE 802.3bt (Type 1-4) Power over Ethernet (PoE) powered device (PD) interface controller that supports power levels up to 90 W at the PSE and 71.3 W at the PD input over a 100-meter CAT5 cable, housed in a 20-pin VQFN (5x5 mm) package. The -4 grade variant implements a 335-mA inrush current compatible with all PSE types. A PoE PD interface controller is the analog front-end IC that sits between the Ethernet cable's powered pairs and a device's isolated DC-DC converter. It performs detection, classification, inrush control and hot-swap switching under IEEE 802.3af/at/bt standards, forming part of the power management IC hierarchy used in networked devices such as access points, IP cameras and LED lighting. Key features include support for both IEEE 802.3at (PoE+) and IEEE 802.3bt (draft) Type 1-4 powered devices, automatic MPS (Maintain Power Signature) and Autoclass, and low internal switch resistance that permits high-power designs up to 90 W. Automatic MPS allows the PD to remove the power converter from the MPS duty cycle for energy savings, while Autoclass enables the PSE to discover actual power consumption. The TPS2372-4 uses the low inrush rating (335 mA) shared across its family, ensuring compatibility with all PSE types while a high-power PD must limit its converter startup peak current per the TI datasheet. The integrated low-resistance pass device reduces conduction losses versus discrete hot-swap MOSFET solutions. Typical applications include 802.3bt Type 3/4 LED lighting drivers, 5G small-cell radios and wireless access points, security IP cameras, network switches, and industrial IoT gateways that draw power directly from the Ethernet cable. Design consideration: pair the TPS2372-4 with a converter whose startup peak current respects the inrush envelope, and follow the TI EVM (TPS2372-3EVM-757) reference layout for the detection/classification front-end. This page synthesizes distributor pricing, drop-in alternatives, comparison data, and practical design notes not found in the manufacturer datasheet.
TPS2372-4RGWT - IEEE 802.3bt PoE PD Controller 90W | TI
The Texas Instruments TPS2372-4RGWT is a 1-channel IEEE 802.3bt (Type 1-4) Power over Ethernet powered-device (PD) interface controller supporting up to 90 W, with an integrated low-RDS(on) internal pass switch, supplied from 0 V to 57 V in a 20-pin VQFN (5x5 mm) package with exposed pad. A PoE PD controller is the front-end power-management IC that resides inside a powered device such as an IP camera, wireless access point, or LED luminaire. It performs detection, classification, and inrush-current limiting so the power-sourcing equipment (PSE) in the network switch can safely identify and power the device over the Ethernet cable. Within the power-management hierarchy, it sits between the RJ45 magnetics/diode bridge and the isolated DC-DC converter that generates the system rails. Key features of the TPS2372-4 include support for IEEE 802.3at (PoE+) and 802.3bt draft Type 1-4 power classes, Automatic MPS to maintain power through low-load periods, and Autoclass for accurate power allocation reporting to the PSE. The -4 variant's low internal switch resistance enables full 90 W Type 4 operation, while the related TPS2372-3 supports up to 60 W. Technically, the device integrates the detection and classification signature resistors, a hot-swap MOSFET with current limiting, thermal protection, and fault supervision. The low switch resistance minimizes conduction losses at the multi-ampere input currents demanded by Type 3 and Type 4 systems, improving overall efficiency and reducing heatsinking requirements. Typical applications include 802.3bt high-power LED lighting, 5G small cells and wireless access points, PTZ IP security cameras, and industrial networked devices where a single Ethernet cable delivers both data and up to 90 W of power. When designing, place the IEEE signature components (the 24.9 k-ohm detection resistor and classification resistors) directly at the VDD/RTN pins, and verify the inrush and operating current limits against your isolated converter's input capacitance to avoid nuisance tripping during startup. This page synthesizes distributor availability, same-package drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS23730RMTR - 802.3bt PoE PD Controller 60W | Texas Instruments
The Texas Instruments TPS23730RMTR is an IEEE 802.3bt Type 3 (Class 1-6) Power over Ethernet powered-device (PD) controller with an integrated high-efficiency current-mode DC-DC controller, supplied in a 45-pin VQFN (RMT) package measuring 7x5 mm and rated from -40C to +125C. It integrates a robust 100-V, 0.3-ohm (typ) hotswap MOSFET and supports power levels up to 60 W, and is EA Gen 2 logo-ready as a PoE 2 PD controller. A PoE PD controller is the interface IC that negotiates power with a Power Sourcing Equipment (PSE) port, performs detection, classification, and inrush current limiting, then hands off to a DC-DC converter that produces the equipment's usable rails. Within the power-management hierarchy it spans both the PoE interface layer and the switching-regulator control layer, replacing the two-chip discrete solutions used in earlier 802.3at designs. Key differentiating features include complete single-chip 802.3bt Type 3 compliance for Class 1-6 power levels, an allocated power indicator output, support for parallel or split power operation, and a current-mode controller optimized for both flyback and active-clamp forward (ACF) topologies. The integrated 100-V hotswap MOSFET with 0.3-ohm on-resistance removes an external pass device, reducing BOM count and conduction losses at multi-amp input currents. On the technical side, the DC-DC controller section supports high-efficiency isolated and non-isolated conversions from the 48-V PoE rail, with current-mode control providing inherent cycle-by-cycle current limiting and simple loop compensation. EA Gen 2 (PoE 2) readiness means the TPS23730 passes certification requirements for next-generation high-power PoE deployments, supporting up to 60 W at the PD for Type 3 Class 6 operation. Typical applications include 5G small-cell radios and network cameras that draw 40-60 W, wireless access points, LED lighting drivers powered from Ethernet, and industrial IP intercom or display terminals where a single Cat5e cable must carry both data and power. The 60-W envelope with allocated power indicator outputs makes it particularly suitable for two-pair Type 3 PD designs. Design-wise, validate the transformer or forward magnetics for the full Class 6 power level and provide adequate PCB copper under the RMT exposed pad for hotswap MOSFET conduction and switching losses; TI's TPS23730EVM-093 reference design is the recommended starting point for new layouts. This page synthesizes distributor pricing, lifecycle data, and application guidance not found in a single manufacturer datasheet.
TPS23734RMTR - IEEE 802.3bt Type 3 PoE PD Controller | TI
The Texas Instruments TPS23734RMTR is an IEEE 802.3bt Type 3 Class 1-4 Power-over-Ethernet (PoE) Powered Device (PD) controller with an integrated high-efficiency DC-DC controller, housed in a 45-pin VQFN (RMT) package measuring 7 mm x 5 mm. As a PoE 2 / EA Gen 2 logo-ready PD controller, it includes a robust 0.3 ohm (typical) internal hotswap MOSFET and supports power levels up to 30 W operation across 802.3bt Type 3 and 802.3at PD applications. The device integrates an internal PWM controller intended for flyback or active-clamp forward primary-side-regulated DC-DC topologies, eliminating the need for an opto-isolator and significantly simplifying isolated PoE supply designs. An IEEE 802.3bt PD controller is a specialized interface IC that negotiates power classification with a Power Sourcing Equipment (PSE) over twisted-pair Ethernet cabling, then converts the incoming PoE voltage into a regulated supply rail for downstream loads. These devices sit at the front end of PD hardware such as IP phones, wireless access points, security cameras, and IoT gateways, and they bridge the PoE interface standard with the application board. Within a power-management taxonomy the TPS23734 is part of: PoE PD controller -> Power-over-Ethernet IC -> Power Management Interface IC -> Power Management -> Semiconductor. Key differentiating features of the TPS23734RMTR include integrated primary-side regulation (PSR) which removes the secondary-side feedback optocoupler and TL431, an automotive temperature grade of -40 C to +125 C, and EA Gen 2 logo-ready compliance with the IEEE 802.3bt specification. The internal hotswap FET minimizes external component count and the device supports all five 802.3bt classes (Class 1 through Class 4), enabling a single PCB design to address 15 W, 30 W, and intermediate power levels in the same hardware platform. The architecture pairs a hardened PoE interface front-end (signature, classification, and inrush control) with an integrated current-mode PWM controller optimized for high-efficiency flyback conversion. Primary-side regulation samples auxiliary winding voltage during the MOSFET off-time to close the loop without secondary-side feedback parts. This topology reduces BOM cost, improves MTBF, and avoids the bandwidth and aging limitations of opto-isolated feedback. Typical applications for the TPS23734RMTR include PoE-powered wireless access points (Wi-Fi 6/6E APs), IP surveillance cameras, VoIP phones, IoT and smart-building sensors, and industrial PoE-powered controllers where isolated, regulated 5 V, 12 V, or 24 V rails are required from 42-57 V PoE inputs. Up to 30 W operation covers most single-board PoE appliances. When designing with this device, pay close attention to the transformer design for PSR applications - the auxiliary winding ratio directly sets output voltage accuracy, and proper RCD snubber sizing is essential for efficiency. Layout should keep the hotswap path short and place the bootstrap capacitor immediately adjacent to the BOOT pin to avoid PWM-controller UVLO. Operating ambient temperature may limit output power; derate using the application-specific thermal profile. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes not consolidated in the manufacturer datasheet, giving engineers an actionable reference for selecting the TPS23734RMTR in new PoE PD designs.
TPS23751PWPR - 802.3at PoE+ PD Interface & Flyback Controller | TI
The Texas Instruments TPS23751PWPR is an IEEE 802.3at (PoE+) powered-device (PD) interface controller combined with a current-mode flyback DC-DC PWM controller, delivered in a 16-pin HTSSOP (PWP) package with exposed PowerPAD, rated up to 25.5 W from a 0 V to 57 V PoE input range. A Power-over-Ethernet powered-device interface is the front-end circuit that negotiates and validates power delivery over Ethernet cabling per the IEEE 802.3af/at standards, handling detection, classification, and inrush current limiting before an isolated or non-isolated DC-DC converter converts the 37 V to 57 V PoE rail to system voltages. In the power-management hierarchy it sits between the Ethernet magnetics/diode bridges and the system power tree. Key features include hardware type-2 classification per IEEE 802.3at, an auxiliary power detect (APD) input that enables seamless switchover between PoE and wall-adapter power, and a current-mode PWM controller optimized for high efficiency across wide load ranges, supporting both flyback and synchronous flyback topologies. The integrated thermal protection and precision 25.5 W class-4 signature support full PoE+ designs such as wireless access points and IP security cameras. Technically, the PoE section implements detection, classification, and a controlled inrush path with a pass device, while the controller section uses peak current-mode control with programmable oscillator frequency, enabling optimized transformer designs and high light-load efficiency - important for energy-efficient (Energy-Efficient Ethernet adjacent) designs. Typical applications include 802.3at PoE+ wireless access points, IP phones, IP surveillance cameras, and networked industrial equipment that must draw power from the Ethernet cable or fall back to auxiliary adapter power. Design consideration: keep the detection and classification resistor networks within IEEE tolerance, and use the PowerPAD soldered to a copper pour for thermal dissipation at full PoE+ load. This page synthesizes distributor data, the TPS23750 comparison, and practical PoE design notes not found in the datasheet. Pricing shown is as of 2026-10-19.
TPS23753A - IEEE 802.3at PoE PD Interface + DC-DC Controller | TI
The Texas Instruments TPS23753A is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC-DC controller optimized specifically for isolated converter designs, supporting the IEEE 802.3at standard as a 13-W, type 1 PD in a 14-pin TSSOP (PW) package. A PoE powered-device interface is the front-end circuit that safely extracts power from an Ethernet cable. It performs detection, classification, inrush limiting, and load switching per the IEEE 802.3af/802.3at standards, then hands regulated power to an isolated (or non-isolated) DC-DC converter stage. Within the power-management hierarchy, the TPS23753A belongs to the PoE controller family that integrates both the PD interface and the PWM controller in a single semiconductor device, reducing external component count versus discrete two-chip solutions. Key features include a complete IEEE 802.3at-compliant PoE interface with enhanced ESD ride-through capability, an integrated robust 100-V, 0.7-ohm hotswap MOSFET that eliminates a discrete external FET, programmable switching frequency with synchronization support for noise-sensitive designs, and adapter ORing support with 12-V adapter operation for auxiliary-power architectures. On the technical side, the device uses a current-mode control architecture optimized for isolated flyback and forward converter topologies, which simplifies transformer-based designs commonly used in PoE PD applications. The hotswap MOSFET integration reduces BOM cost and board area, while the ESD enhancements improve field robustness on long Ethernet cable runs where surge and ESD events are common. Type 1 compliance means the device advertises and manages up to 13 W at the PD input, a superset of the original IEEE 802.3af requirements. Typical applications include IP security cameras, IP telephones, wireless access points, and networked industrial sensors, where the TPS23753A converts PoE line power into one or more isolated low-voltage rails for the system electronics. Design consideration: because the integrated 100-V hotswap MOSFET handles the full PD input current, verify inrush and thermal margins at your maximum load; the 13-W type 1 budget must cover converter efficiency losses, so plan the transformer and output design around roughly 10-12 W of usable output power. This page synthesizes distributor availability data, the TI/TI-E2E-verified distinction between TPS23753 and TPS23753A, drop-in alternative analysis, and practical design guidance not found in the manufacturer datasheet. Pricing shown is as of 2026-10-19.
TPS23755RJJR - IEEE 802.3at PoE PD with Flyback Controller | TI
The Texas Instruments TPS23755RJJR is an IEEE 802.3at Power over Ethernet (PoE) powered device (PD) interface and current-mode no-opto flyback DC-DC controller that integrates a 150-V switching power FET, housed in a 24-pin VSON (6x4 mm) package. A PoE powered device interface is the front-end circuit that negotiates and extracts power from a Power Sourcing Equipment (PSE) port such as a PoE switch or injector, according to the IEEE 802.3at standard. Within the power-management hierarchy, it sits between the Ethernet cabling and the isolated flyback converter that generates the system's low-voltage rails, combining classification, inrush control, hot-swap protection, and switching regulation in one IC. Key features include full 802.3at Type 1 (13 W) PD compliance, an integrated 150-V power MOSFET that eliminates the external pass switch, and current-mode flyback control with primary-side regulation (PSR). PSR removes the optocoupler and secondary-side reference, cutting component count and board area while improving reliability in isolated designs. Technically, the device employs spread spectrum frequency dithering (SSFD) to reduce conducted EMI peaks, easing filter design toward CISPR compliance. Advanced startup circuitry supports operation from the PoE detection and classification voltage range before full power is available, and the current-mode architecture provides inherent cycle-by-cycle current limiting and simple loop compensation for the flyback power stage. Typical applications include IP security cameras, wireless access points, VoIP phones, and networked LED lighting luminaires - all space-constrained PoE endpoints where a single-chip PD interface plus converter saves measurable board area. The high integration level makes it especially attractive for compact, cost-sensitive camera modules. Design consideration: because the power FET is integrated, PCB copper area under the VSON exposed pad is the main thermal path; size the transformer and demagnetization timing so PSR sampling windows are honored, and verify EMI with SSFD enabled before final layout freeze. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS23755RJJT - 802.3at PoE PD + Flyback Controller | TI
The Texas Instruments TPS23755RJJT is an IEEE 802.3at Power over Ethernet (PoE) powered-device (PD) interface controller with an integrated 150-V switching power FET and a current-mode no-opto flyback DC-DC controller, supplied in a 24-pin VSON CLCC (6x4 mm) package with exposed pad and delivering up to 13 W of isolated output power from a 57 V PoE input. A PoE powered-device interface controller is a power management IC that performs the detection, classification, inrush current limiting, and undervoltage-lockout functions demanded by the IEEE 802.3at standard, then hands off the validated power to an isolated or non-isolated DC-DC converter stage. It sits between the RJ45 Ethernet port and the converter, forming the entry point of the PD power architecture. Key features include full IEEE 802.3at Type 2 compliance with two-event classification, an internal 150 V power MOSFET that eliminates a discrete switching FET, primary-side regulation (PSR) that removes the optocoupler and secondary feedback circuitry, and spread spectrum frequency dithering (SSFD) for reduced EMI. Advanced startup supports bias from the auxiliary (adapter) power path. The current-mode flyback controller integrates the control loop, oscillator, and drivers, enabling compact, low-component-count designs. PSR senses output voltage from the primary-side auxiliary winding, simplifying the transformer and secondary circuit while supporting regulated isolated outputs typical of 5 V and 12 V PD loads. Typical applications include IP security cameras, wireless access points, VoIP phones, and network-connected LED lighting drivers powered directly from the Ethernet cable. Design consideration: provide adequate copper area under the VSON exposed pad for thermal dissipation and follow the datasheet PCB layout guidelines for the switching loop to limit EMI. This page synthesizes distributor sourcing data, drop-in family alternatives, and practical design notes not found in the manufacturer datasheet alone.
TPS23757PWR - PoE+ PD Controller w/ DC-DC, 20-TSSOP | TI
The Texas Instruments TPS23757PWR is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC/DC controller optimized for isolated flyback and forward converters, housed in a 20-pin TSSOP (PW) package. It supports the IEEE 802.3at standard for a Type 1 PD delivering up to 13W, while also providing input voltage ORing between the PoE rail and an auxiliary adapter supply of 12V to 57V. What is a PoE Powered Device (PD) controller? A PoE PD controller is the integrated circuit on the device side of an Ethernet cable that negotiates the power contract with the Power Sourcing Equipment (PSE), performs detection, classification, inrush control, and hot-swap functions, and then provides a regulated bulk rail for downstream DC/DC conversion. The TPS23757 combines that front-end PD interface with a current-mode PWM controller, placing both functions in a single chip so the PD only needs the TPS23757, an external power MOSFET, a transformer, and a few passive components to build an isolated PoE power supply. Key features include 100V-rated hot-swap FET driver for PD pass-through switching, IEEE 802.3at hardware classification with two-event classification signaling support, programmable inrush current limiting, and a wide auxiliary adapter ORing range from 12V to 57V. The integrated DC/DC controller uses peak-current-mode control with programmable slope compensation, supporting both primary-side regulated flyback topologies and forward converters with a single output. The TPS23757's 100V absolute-maximum input rating exceeds the 802.3at transient tolerance requirement of 100V for 50µs, providing robust line-side protection. Adaptive gate drive and soft-start features minimize inrush stress on the bulk capacitor, while undervoltage lockout and thermal shutdown protect against fault conditions. The TSSOP-20 package with PowerPAD thermal pad offers a thermal resistance of approximately 35 C/W, enabling operation at full PD load without external heatsinking. Typical applications include IEEE 802.3at Type 1 powered devices such as IP phones, wireless access points, security cameras, IoT gateways, and small-form-factor PoE+ powered equipment. The 13W power level covers a wide range of enterprise networking endpoints. A key design consideration is the auxiliary adapter ORing: when both PoE and adapter are present, the TPS23757 selects the higher voltage rail and uses the adapter as a seamless backup, useful for installations where wall power is preferred but PoE failover is required. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that go beyond what the manufacturer datasheet alone provides.
TPS23758RJJR - IEEE 802.3at PoE PD Flyback Controller | TI
The Texas Instruments TPS23758RJJR is an IEEE 802.3at Power over Ethernet (PoE) powered-device (PD) controller with an integrated 150-V power FET and a current-mode, no-opto synchronous flyback DC-DC controller, housed in a 24-pin VSON (6 mm x 4 mm) surface-mount package. It supports 802.3at Type 1 power levels up to 13 W from the PoE link. A PoE PD interface is the circuit that negotiates and extracts power from Ethernet cabling per IEEE 802.3at, sitting within the hierarchy of power management ICs (PoE controller -> power interface -> power management IC -> semiconductor). It performs detection, classification, inrush control, and load switching for devices powered over the data cable, such as IP cameras and wireless access points. Key differentiating features include high integration: the TPS23758 combines the PD interface, a 150-V switching power FET, and the DC-DC controller in one die set, reducing external component count. Primary-side regulation (PSR) eliminates the optocoupler and secondary-side feedback network, while spread spectrum frequency dithering (SSFD) reduces EMI peak emissions. Advanced startup supports efficient boot sequencing from the PoE input. Technically, the device operates as a current-mode flyback controller optimized for isolated or non-isolated PoE conversion topologies. The no-opto sync architecture uses transformer auxiliary-winding sensing for output regulation, improving reliability and shrinking the solution footprint compared with conventional optocoupler flybacks. The integrated 150-V FET withstands PoE input transients common on long cable runs. Typical applications include IEEE 802.3at Type 1 (13 W) IP network cameras, wireless access points, VoIP phones, and other size-constrained PoE-powered endpoints where board space and EMI compliance are critical constraints. A key design consideration is transformer selection: the no-opto PSR scheme depends on accurate auxiliary-winding design, and TI recommends following the TPS23758EVM-080 reference design transformer specification for Type 1 applications. This page synthesizes distributor inventory data, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
TPS23758RJJT - 802.3at PoE PD with Flyback Controller | TI
The Texas Instruments TPS23758RJJT is an IEEE 802.3at Power over Ethernet (PoE) powered device (PD) controller that integrates a 150-V switching power FET and a current-mode no-opto synchronous flyback DC-DC controller in a 24-pin VSON (6x4 mm) exposed-pad package. 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.
TPS2375PW-1 - IEEE 802.3af PoE PD Controller, 100V | Texas Instruments
The Texas Instruments TPS2375PW-1 is an IEEE 802.3af Power over Ethernet (PoE) Powered Device (PD) controller with auto-retry fault recovery, a 100-V rating, and a true open-drain power-good output, housed in an 8-pin TSSOP (PW) package rated for operation from -40C to +85C. Power over Ethernet is a technology defined by the IEEE 802.3af standard that delivers DC power alongside data over standard Category 5 Ethernet cabling. A PoE system consists of Power Sourcing Equipment (PSE), such as a PoE switch or midspan injector, and a Powered Device (PD), such as an IP camera, wireless access point, or VoIP phone. The PD controller is the interface IC that performs detection, classification, and inrush-current control so the PSE can safely identify and power the end device. It sits at the entry point of the PD power path, ahead of the isolated DC-DC converter that generates the system rails, and therefore forms part of the broader power management IC hierarchy. Key features of the TPS2375PW-1 include full compliance with the IEEE 802.3af specification, with device thresholds offset by 1.5 V from the standard to account for input diode-bridge drops, ensuring polarity-insensitive operation. The -1 suffix denotes second-generation silicon with a 100-V absolute maximum rating and a true open-drain power-good (PGB) output. Its defining differentiator is auto-retry: after an overcurrent fault, the device automatically attempts to re-enable the pass MOSFET instead of latching off, eliminating the need for a power cycle. An integrated 0.58-ohm sense element plus classification resistor support (Class 0-3, up to 12.95 W at the PD) reduces external component count. Architecturally, the controller integrates the detection and classification signature circuits, a 57-V rated hot-swap pass-element gate driver, current-limit and foldback protection, and thermal shutdown. The DETC pin manages detection behavior and the CLS pin programs the power class. During startup, controlled gate slew limits inrush current so the PSE is not tripped by capacitor charging; during a fault, the current limit engages and the auto-retry timer restarts the pass element once the fault clears. Typical applications include IP network cameras, 802.11 wireless access points, VoIP telephones, and PoE-enabled lighting or access-control nodes - anywhere a device must draw 13 W or less from an Ethernet port. The part pairs naturally with a flyback or forward converter to generate isolated low-voltage rails. A key design consideration is sizing the bulk input capacitance so inrush stays within the PSE inrush budget, and ensuring the external pass MOSFET and TVS diode meet the 100-V transient environment. Prices on this page are as of 2026-10-19 (LCSC from $2.3057). This page synthesizes distributor pricing, drop-in alternatives, practical design notes, and comparison data not found in the manufacturer datasheet alone.
TPS2378DDAR - IEEE 802.3at PoE+ PD Controller 0.85A | TI
The Texas Instruments TPS2378DDAR is an IEEE 802.3at high-power Power over Ethernet (PoE) powered device (PD) interface controller that continuously handles up to 0.85 A using a low 0.5-ohm internal switch, housed in an 8-pin SO PowerPAD (DDA/HSOIC) package rated from -40C to +85C. A PoE powered device interface is the front-end circuit that lets a network-enabled product safely draw power over the same Ethernet cable that carries its data. Sitting at the top of the power management hierarchy, it performs detection, classification, inrush current limiting and load switching per the IEEE 802.3af and 802.3at standards, before handing a regulated rail to downstream DC-DC converters. The TPS2378 is TI's PD interface controller in that family. Key features include support for both IEEE 802.3at type-2 (PoE+, up to 25.5 W at the PD) and 802.3af (PoE, class 0-3) operation, an auxiliary power detect (APD) input that gives priority to an external DC supply, and the internal 0.5-ohm pass switch that eliminates a discrete MOSFET. Automatic classification with the CLS pin and a T2P output signal simplify type-2 system designs. Architecturally, the TPS2378 integrates the IEEE detection and classification state machines, a thermal shutdown, and a gate driver for the internal pass element. The PowerPAD exposed pad on the DDA package provides enhanced thermal dissipation, which is what enables continuous 0.85 A operation through an on-chip switch. The 37-page TI datasheet documents the full state machine timing and threshold levels. Typical applications include IP security cameras, wireless access points, VoIP phones, PoE lighting (LED) drivers, and networked industrial sensors that must comply with 802.3at type-2 power budgets. Design-wise, the APD feature allows the PD to prefer a wall-adapter input; tie APD appropriately if auxiliary power is not used. Verify inrush compliance (type-2 class events) during qualification. This page adds distributor pricing, drop-in alternatives, and practical design guidance beyond the TI datasheet.
TPS2386BPW - Quad-Port PoE PSE Controller | Texas Instruments
The Texas Instruments TPS2386BPW is a quad-port Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) controller housed in a 64-pin TQFP (PW) package, designed to manage four independent Ethernet power ports in switch and midspan applications. A PoE PSE controller is a power management IC that sits inside a network switch, router, or PoE injector and governs the safe delivery of DC power over Ethernet cabling to powered devices (PDs) such as IP cameras, wireless access points, and VoIP phones. It handles detection, classification, and current limiting, and sits within the broader hierarchy of Ethernet power subsystems -> PoE PSE controller -> power management IC -> semiconductor. Key features of the TPS2386B family include multi-port PoE power management, integrated detection and classification of attached powered devices, per-port current and thermal supervision, and fault protection. The device supports autonomous operation modes that allow port power-up decisions without host intervention, reducing software burden on the switch CPU. Technically, the controller performs the standardized PD detection signature and classification handshake defined by IEEE 802.3 PoE specifications, monitors port current through external sense elements, and coordinates load sharing across ports. Fault conditions such as over-current, over-temperature, and undervoltage are reported through status outputs, enabling robust fault handling in enterprise networking equipment. Typical applications include PoE-enabled Ethernet switches, PoE midspan injectors, network-attached access point enclosures, and industrial Ethernet infrastructure. Quad-port integration makes the part attractive for switch designs where board area and BOM count must be minimized. Design consideration: PoE PSE controllers require careful layout of the high-current port paths and external MOSFETs; sense-resistor placement and thermal design directly affect accuracy and reliability, so follow the manufacturer datasheet layout guidance closely. This page synthesizes distributor availability, drop-in alternatives, and practical design guidance not found in a single manufacturer datasheet, helping engineers select and cross-reference the TPS2386BPW faster.
TPS23881ARTQT - 8-Ch 4-Pair Type-4 PoE PSE | Texas Instruments
The Texas Instruments TPS23881ARTQT is a 4-pair, Type-4, 8-channel Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) controller with 200 mΩ RSENSE and autonomous I2C/manual modes, housed in a 56-pin VQFN (8x8 mm) power package rated for industrial -40°C to +125°C operation. 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.
TPS23881RTQR - 8-Ch 802.3bt PoE PSE Controller | Texas Instruments
The Texas Instruments TPS23881RTQR is an 8-channel, 4-pair, Type-4 Power-over-Ethernet (PoE) Power Sourcing Equipment (PSE) controller housed in a 56-pin VQFN (RTQ) package (8x8 mm). It complies with the IEEE 802.3bt standard, supports 200-mΩ RSENSE current sensing, and delivers up to 90 W per port across 2-pair or 4-pair configurations with auto-mode and semi-auto-mode operation. 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.
TPS23882RTQR - 8-Channel PoE PSE Controller | TI
The Texas Instruments TPS23882RTQR is a Type-3, 2-pair, 8-channel Power over Ethernet (PoE) power sourcing equipment (PSE) controller with embedded SRAM programmability and integrated 200 milliohm current sense resistors, housed in a 56-pin QFN (8x8 mm) package rated from -40C to +125C. It inserts power onto Ethernet cabling in accordance with the IEEE 802.3bt standard and remains backward compatible with IEEE 802.3af (PoE) and 802.3at (PoE+) powered devices. A PoE PSE controller is a power management IC that manages detection, classification, and controlled power delivery onto Ethernet data pairs, sitting at the top of the PoE system hierarchy (PSE controller -> PoE system -> Ethernet power infrastructure). The PSE must detect valid powered device signatures, complete mutual identification, and apply power only after classification succeeds, protecting both the switch port and the PD. Key features include 8 independent ports supporting up to 30 W per port in Type-3 2-pair mode, on-chip 200 mOhm sense resistors that reduce BOM count and board area versus external-sense designs, and SRAM-based programmability for custom detection and classification profiles. Port remapping and pin-to-pin compatibility with the TPS2388, TPS23880, and TPS23881 devices enable interchangeable PCB designs across TI's PSE controller family. The TPS23882 improves on the earlier TPS2388 by reducing current sense resistor requirements and adding SRAM programmability, lowering total system cost for multi-port PoE switches. It manages valid signature detection, AC discharge, classification, and per-port current limiting autonomously, or under host MCU control via a serial management interface. Typical applications include enterprise PoE switch line cards, network video recorder and surveillance switch ports, wireless access point power delivery, and multi-port PoE midspan injectors where 802.3bt compliance is mandatory. When designing the board, use TI reference layouts to preserve interchangeable footprints across TPS2388x family members, and verify thermal performance when running all 8 ports at full 30 W loads. This page synthesizes verified distributor pricing, drop-in alternatives within the TI PSE family, and practical design notes not found in the manufacturer datasheet.
TPS23882RTQT - 8-Ch Type-3 PoE PSE Controller | TI
The Texas Instruments TPS23882RTQT is an 8-channel, Type-3, 2-pair Power Sourcing Equipment (PSE) controller with SRAM programmability and 200 mOhm current sense resistors, housed in a 56-pin VQFN (8x8 mm) package. It inserts power onto Ethernet cables in accordance with IEEE 802.3bt, and also supports 802.3at (PoE+) and 802.3af (PoE) standards. 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.
TPS2393 - -48V Hot Swap Controller | Texas Instruments
The Texas Instruments TPS2393 is a hot swap power manager optimized for nominal -48-V telecom and industrial systems. It operates over a supply voltage range of -20 V to -80 V and is rated to withstand spikes to -100 V. The device is available in a 14-pin TSSOP package (PW suffix) and provides essential hot swap functions including inrush current limiting, overcurrent protection, and fault reporting. A hot swap controller is a power management IC that safely inserts or removes a circuit board from a live backplane without causing glitches or damage. It manages the inrush current during insertion, monitors the load current, and disconnects the load on fault conditions. In the power management hierarchy, a hot swap controller sits between the system power bus and the load, acting as an intelligent switch and protector. Key features of the TPS2393 include a wide input voltage range of -20 V to -80 V, a programmable inrush current limit, and an active-low fault output for system monitoring. The device also provides a programmable undervoltage lockout (UVLO) and overvoltage protection, ensuring robust operation in harsh telecom environments. The TPS2393 is designed for -48-V systems, which are standard in telecommunications and networking equipment. The TPS2393 uses a charge pump to drive an external N-channel MOSFET, allowing low-loss power path control. It includes a programmable timer for fault retry and a latch-off mode for persistent faults. The device is specified for the industrial temperature range (-40°C to +85°C) and is RoHS compliant. The 14-pin TSSOP package is compact and suitable for space-constrained designs. Typical applications include telecom line cards, base station power distribution, server backplanes, and industrial -48-V power distribution systems. The TPS2393 is ideal for any system requiring safe board insertion and removal in a -48-V environment. When designing with the TPS2393, ensure the external MOSFET is properly sized for the maximum load current and that the sense resistor is selected to set the desired current limit. The UVLO and fault timer resistors should be chosen to match the system's power-up requirements.