Giant Infotech Corp

The GI32050 power interface port and pulse width modulation (PWM) controller provides a complete integrated solution for Powered Devices (PD) that connect into Power over Ethernet (PoE) systems. The GI32050 integrates an 80V, 400mA line connection switch and associated control for a fully IEEE 802.3af compliant interface with a full featured current mode pulse width modulator dc-dc converter. All power sequencing requirements between the controller interface and switch mode power supply (SMPS) are integrated into the IC. The GI32050 provide a 50% maximum duty cycle limit and no slope compensation device.

Fully Compliant 802.3af Power Interface Port
80V, 1Ω, 400mA Internal MOSFET
Programmable Inrush Current Limit
Detection Resistor Disconnect Function
Programmable Classification Current
Programmable Under-voltage Lockout with Programmable Hysteresis
Thermal Shutdown Protection
Current Mode Pulse Width Modulator
Supports both Isolated and Non-Isolated Applications
Error Amplifier and Reference for Non-Isolated Applications
Programmable Oscillator Frequency
Programmable Soft-start
50% Maximum Duty Cycle Limiter, No Slope Compensation
800mA Peak Gate Driver

VoIP Telephones
Network Cards
Security Camera Systems
Safety Backup Power
Remote Internet Power