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Overview
| Topology | Buck Converter |
| Input voltage | 0-57 V |
| Switching frequency | 226-276 kHz |
| Output 1 | 5 V / 4.5 A |
| IC revision | C |
Description
The TPS23751 is a 16-pin integrated circuit that combines a Power-over-Ethernet (PoE) powered device (PD) interface and a current-mode DC-DC controller optimized specifically for applications requiring high efficiency over a wide load range.
The PoE interface implements type-2 hardware classification per IEEE 802.3at. It also includes an auxiliary power detect (APD) input and a disable function (DEN). A 0.5 Ω, 100 V pass MOSFET minimizes heat dissipation and maximizes power utilization.
The DC-DC controller features internal soft-start, a bootstrap startup current source, current-mode control with slope compensation, blanking, and current limiting. Efficiency is enhanced at light loads by disabling synchronous rectification and entering variable frequency operation (VFO).
The TPS23752 is a 20-pin extended version of the TPS23751 with the addition of a Sleep Mode feature. Sleep Mode disables the converter to minimize power consumption while still generating the Maintain Power Signature (MPS) required by IEEE802.3at.
Features
- IEEE 802.3at Classification with Status Flag
- High Efficiency Solutions over Wide Load Range
- Powers up to 25.5 W PDs
- Robust 100 V, 0.5 Ω Hotswap MOSFET
- Synchronous Rectifier Disable Signal
- PowerPAD TSSOP Packages
- Complete PoE Interface Plus DC-DC Controller
- Adapter ORing Support
- Programmable Frequency
- TPS23752 Supports Ultra-Low Power Sleep Modes
–40°C to 125°C Junction
- Temperature RangeREMARK:-L1=3.3uH used
Typical applications
- Multiband Access Points
- Video and VoIP Telephones
- IEEE 802.3at-Compliant Devices
- Pico-Base Stations
- Security Cameras
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(nH) | IR(A) | ISAT(A) | fres(MHz) | Mount | LR(nH) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | Material | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCM SMT High Current Flat Wire Inductor, 330 nH, 26 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-HCM SMT High Current Flat Wire Inductor | Inductance330 nH | Rated Current26 A | – | Self Resonant Frequency22 MHz | MountSMT | Rated Inductance270 nH | Saturation Current @ 10%23.6 A | Saturation Current @ 30%27.7 A | DC Resistance0.155 mΩ | MaterialMnZn | ||||
 | WE-TPC SMT Tiny Power Inductor, 3300 nH, 2.55 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-TPC SMT Tiny Power Inductor | Inductance3300 nH | Rated Current2.55 A | Saturation Current2.3 A | Self Resonant Frequency40 MHz | MountSMT | – | – | – | – | – |