The GI32054 supports 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 thedefined types with a single resistor.
The dc/dc controller features two complementary gate drivers with programmable dead time. This simplifies design of active-clamp forward converts 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 softstart, bootstrap startup 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 blank, with a default period, simplifies the usual current sense filter design trade-offs. The GI32054 has a 11V converter startup.
- 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 85V, 0.4 Ω Hotswap MOSFET
- –40°C to 125°C Junction Temperature Range
- Industry Standard PowerPAD™ HTSSOP-20
- VoIP Telephones
- Network Cards
- Security Camera Systems
- Safety Backup Power
- Remote Internet Power