FULLY-INTEGRATED 802.3-COMPLIANT POE PD INTERFACE AND LOW-EMI SWITCHING REGULATOR
Si3402-B
FULLY-INTEGRATED 802.3-COMPLIANT POE PD INTERFACE AND LOW-EMI SWITCHING REGULATOR
Features
Pin-compatible ...
Si3402-B
FULLY-INTEGRATED 802.3-COMPLIANT POE PD INTERFACE AND LOW-EMI SWITCHING
REGULATOR
Features
Pin-compatible replacement for the obsolete Si3402-A
IEEE 802.3 standard-compliant solution, including pre-standard (legacy) PoE support
Highly-integrated IC enables compact solution footprints Minimal external components Integrated diode bridges and transient surge suppressor Integrated switching
regulator controller with on-chip power FET Integrated dual current-limited hotswap switch
Programmable classification circuit
Incorporates switcher EMIreduction techniques.
Supports non-isolated and isolated switching topologies
Comprehensive protection circuitry Transient overvoltage protection Undervoltage lockout Early power-loss indicator Thermal shutdown protection Foldback current limiting
Low-profile 5 x 5 mm 20-pin QFN RoHS-compliant
Applications
Voice over IP telephones and adapters
Wireless access points Security cameras
Description
Point-of-sale terminals Internet appliances Network devices High power applications
The Si3402 integrates all power management and control functions required in a Power-over-Ethernet (PoE) powered device (PD) application. The Si3402 converts the high voltage supplied over the 10/100/1000BASE-T Ethernet connection into a regulated, low-voltage output supply. The optimized architecture of the Si3402 minimizes the solution footprint, reduces external BOM cost, and enables the use of low-cost...