PRF-1150

DIRE C T E D E N E R GY, INC . T E CHNI C AL N O TE PRF-1150 1KW 13.56 MHz CLASS E RF GENERATOR EVALUATION MODULE Matthew W. Vania Directed Energy, Inc. Abstract The PRF-1150 module is a self-contained 1KW 13.56MHz RF source. The module facilitates operation and evaluation of the DEIC420 RF MOSFET gate driver IC and DE275X2-102N06A RF MOSFET in a practical 13.56 MHz RF generator application. It is all-inclusive, pre-tested, and ready to operate. Directed Energy, Inc. IXYS An Company 2401 Research Blvd. Suite 108 Fort Collins, CO USA 80526 TEL (970) 493-1901 FAX (970) 493-1903 EMAIL: deiinfo directedenergy.com PRF-1150 13.56MHz 1kW Class E RF Generator Doc 9200-0255 Rev 1 2002 Directed Energy, Inc. INTRODUCTION DEI has developed an RF module to demonstrate the capabilities of our DEIC420 RF MOSFET gate driver IC and DE275-102N06X2A 1000V 6A RF MOSFET at ISM frequencies. The PRF-1150 module produces 1000W CW of RF output at 13.56MHz. with 85% DC to RF conversion efficiency. The module is a self-contained RF generator. To produce 1kW of RF output, only external DC power need be applied. The module dimensions as shown in Figure 1 are 6.75 x 3.1 x 2.7 including an air-cooled heatsink and copper heat-spreader. Impingement flow from a standard 4.5 bench fan provides adequate cooling for the 1kW output level. Standard 0.1 dual and single row headers are used for DC input to the module and a single right-angle BNC connector is used for RF output to a 1kW 50 RF load or attenuator. Figure 1: PRF-1150 1KW RF Generator Module MODULE DESCRIPTION Please refer to Figures 1-6 during this module description. Low-Voltage DC is applied to the module via connector J1. 5V 30 ma and 15V 3A are applied to J1 pins 4 and 2 respectively. LEDs D3 and D5 glow green if the appropriate voltages are applied. U1 is a 13.56MHz clock providing a 50% DC, 0-5V square wave. U2A provides a pulse- width adjustable source to drive U4, the DEIC420 gate driver IC. 1