TPS23730 Series

IEEE 802.3bt type-3 class 1-6 PoE 2 PD with high efficiency DC-DC controller

Catalog

IEEE 802.3bt type-3 class 1-6 PoE 2 PD with high efficiency DC-DC controller

Part	Internal Switch(s)	Type	Supplier Device Package	Standards	Number of Channels	Mounting Type	Power - Max [Max]	Operating Temperature [Min]	Operating Temperature [Max]	Auxiliary Sense	Package / Case	Voltage - Supply [Max]	Voltage - Supply [Min]	Supplied Contents	Utilized IC / Part	Function	Embedded
Texas Instruments TPS23730RMTR		Controller (PD) DC/DC	45-VQFN (7x5)	802.3at (PoE+) 802.3bt	1	Surface Mount	60 W	-40 °C	125 ¯C		45-VFQFN Exposed Pad	60 V	0 V
Texas Instruments TPS23730EVM-093		Power Management												Board(s)	TPS23730	Power Over Ethernet (POE)

Catalog

IEEE 802.3bt type-3 class 1-6 PoE 2 PD with high efficiency DC-DC controller

Key Features

• Complete IEEE 802.3bt Type 3 (Class 1-6) PoE PD SolutionEA Gen 2 logo-ready (PoE 2 PD Controller)Robust 100-V, 0.3-Ω (typ) Hotswap MOSFETSupports power levels for up to 60-W operationAllocated power indicator outputs - parallel or serial encoding selectableIntegrated PWM controller for flyback or Active Clamp Forward configurationFlyback control with primary-side regulationSupports CCM operation±1.5% (typ, 5-V output) load regulation (0-100% load range) — with Sync FETAlso supports secondary-side regulationSoft-start control with advanced startup and hiccup mode overload protectionSoft-stop shutdownAdjustable frequency with synchronizationProgrammable frequency dithering for EMIAutomatic Maintain Power Signature (MPS)Auto-adjust to PSE type and load current with auto-stretchPrimary adapter priority input–40°C to 125°C junction temperature rangeComplete IEEE 802.3bt Type 3 (Class 1-6) PoE PD SolutionEA Gen 2 logo-ready (PoE 2 PD Controller)Robust 100-V, 0.3-Ω (typ) Hotswap MOSFETSupports power levels for up to 60-W operationAllocated power indicator outputs - parallel or serial encoding selectableIntegrated PWM controller for flyback or Active Clamp Forward configurationFlyback control with primary-side regulationSupports CCM operation±1.5% (typ, 5-V output) load regulation (0-100% load range) — with Sync FETAlso supports secondary-side regulationSoft-start control with advanced startup and hiccup mode overload protectionSoft-stop shutdownAdjustable frequency with synchronizationProgrammable frequency dithering for EMIAutomatic Maintain Power Signature (MPS)Auto-adjust to PSE type and load current with auto-stretchPrimary adapter priority input–40°C to 125°C junction temperature range

Description

The TPS23730 device combines a Power over Ethernet (PoE) powered device (PD) interface, and a current-mode DC-DC controller optimized for flyback and active clamp forward (ACF) switching regulator designs . In the case of flyback configuration, the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt standard for applications needing up to 51 W or less at PD input. Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt startup requirements are met. The soft-stop feature minimizes stress on switching power FETs , allowing FET BOM cost reduction. The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for continuous conduction mode (CCM), and can work with secondary side synchronous rectification, resulting in optimum efficiency, regulation accuracy and step load response over multiple outputs. The DC-DC controller features slope compensation and blanking. Typical switching frequency is 250 kHz. The automatic MPS enables applications with low power modes or multiple power feeds. It automatically adjusts its pulsed current amplitude and duration according to PSE Type and system conditions, to maintain power while minimizing consumption. The TPS23730 device combines a Power over Ethernet (PoE) powered device (PD) interface, and a current-mode DC-DC controller optimized for flyback and active clamp forward (ACF) switching regulator designs . In the case of flyback configuration, the use of primary-side regulation (PSR) is supported. The PoE interface supports the IEEE 802.3bt standard for applications needing up to 51 W or less at PD input. Programmable spread spectrum frequency dithering (SSFD) is provided to minimize the size and cost of EMI filter. Advanced Startup with adjustable soft-start helps to use minimal bias capacitor while simplifying converter startup and hiccup design, also ensuring that IEEE 802.3bt startup requirements are met. The soft-stop feature minimizes stress on switching power FETs , allowing FET BOM cost reduction. The PSR feature of the DC-DC controller uses feedback from an auxiliary winding for control of the output voltage, eliminating the need for external shunt regulator and optocoupler. It is optimized for continuous conduction mode (CCM), and can work with secondary side synchronous rectification, resulting in optimum efficiency, regulation accuracy and step load response over multiple outputs. The DC-DC controller features slope compensation and blanking. Typical switching frequency is 250 kHz. The automatic MPS enables applications with low power modes or multiple power feeds. It automatically adjusts its pulsed current amplitude and duration according to PSE Type and system conditions, to maintain power while minimizing consumption.