Class 4 PoE PD with flyback/forward DC-DC controller & 12V-57V adapter support
Product details
Parameters
Package | Pins | Size
Features
- Powers up to 30-W (Input) PDs
- DC-DC Control Optimized for Isolated Converters
- Supports High-Efficiency Topologies
- Complete PoE Interface
- Enhanced Classification per IEEE 802.3at With Status Flag
- Adapter ORing Support
- Programmable Frequency With Synchronization
- Robust 100-V, 0.5-Ω Hotswap MOSFET
- –40°C to 125°C Junction Temperature Range
- Industry Standard PowerPAD™ HTSSOP-20
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Description
The TPS23754 and TPS23756 devices have a combined power-over-ethernet (PoE), powered-device (PD) interface, and current-mode DC-DC controller optimized specifically for isolated converters. The PoE interface supports the IEEE 802.3at standard.
The TPS23754 and TPS23756 support a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference. These features allow the designer to determine which power source will carry the load under all conditions.
The PoE interface features the new extended hardware classification necessary for compatibility with high-power midspan power sourcing equipment (PSE) per IEEE 802.3at. The detection signature pin can also be used to force power from the PoE source off. Classification can be programmed to any of the defined types with a single resistor.
The DC-DC controller features two complementary gate drivers with programmable dead time. This simplifies the design of active-clamp forward converters or optimized gate drive for highly-efficient flyback topologies. The second gate driver may be disabled if desired for single MOSFET topologies. The controller also features internal soft start, bootstrap start-up source, current-mode compensation, and a 78% maximum duty cycle. A programmable and synchronizable oscillator allows design optimization for efficiency and eases use of the controller to upgrade existing power supply designs. Accurate programmable blanking, with a default period, simplifies the usual current-sense filter design trade-offs.
The TPS23754 device has a 15-V converter start-up while the TPS23756 device has a 9-V converter start-up. The TPS23754-1 replaces the PPD pin with a no-connect for increased pin spacing.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | TPS2375x IEEE 802.3at, High Efficiency, PoE Interface and DC-DC Controller datasheet (Rev. I) | Dec. 19, 2017 |
Selection guide | Power Management Guide 2018 (Rev. R) | Jun. 25, 2018 | |
Application note | Lightning Surge Considerations for PoE Powered Devices | Apr. 30, 2015 | |
Application note | Implementing a Buck Converter With the TPS23753A | Sep. 20, 2010 | |
Application note | Using the TPS23753A with an External Error Amplifier | Aug. 06, 2010 | |
User guide | TPS23756EVM User's Guide (Rev. A) | Apr. 01, 2010 | |
Application note | Advanced Adapter ORing Solutions using the TPS23753 (Rev. A) | Feb. 09, 2009 | |
Application note | PoE Powered Device for 24 VAC Building Power Applications | Sep. 10, 2008 | |
Application note | Designing an EMI Compliant PoE with Isolated Flyback | May 20, 2008 | |
Application note | Practical Guidelines EMI Compliant PoE | Mar. 27, 2008 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
The TPS23756EVM contains evaluation and reference circuitry for the TPS23756, which is a Class 4 (25.5 W) PoE PD + PWM Controller. The TPS23756 is targeted at wide Vin aplications (12 V - 60 V) in isolated converter topologies and is compliant with the IEEE 802.3 at Power over Ethernet (PoE (...)
Features
- High-power PD and DC-DC converter controllers
- Wide-input voltage range DC-DC converter
- Operates from PoE or external adapters
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
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download PMP40514 BOM.pdf (32KB) -
download PMP40514 Assembly Drawing.pdf (56KB) -
download PMP40514 PCB.pdf (716KB) -
download PMP40514 CAD Files.zip (26KB) -
download PMP40514 Gerber.zip (206KB)
Design files
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download PMP6659 PCB.pdf (83KB) -
download PMP6659 Gerber.zip (623KB) -
download PMP6659 BOM (Rev. A).pdf (39KB)
The Class 4 – Wide Input Range, 15W Power over Ethernet (PoE) Converter reference design is intended as an evaluation module for users to develop end-products for IP security camera applications. This reference design has been (...)
Design files
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download TIDA-00091 BOM.zip (28KB) -
download TIDA-00091 Altium.zip (382KB) -
download TIDA-00091 Gerber.zip (1834KB) -
download TIDA-00091 PCB.pdf (1382KB) -
download TIDA-00091 Assembly Drawing.pdf (336KB) -
download TIDA-00091 Fabrication Drawing.pdf (296KB)
Design files
-
download PMP6584 BOM.pdf (64KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
HTSSOP (PWP) | 20 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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