DESCRIPTION

Intended for analog and digital satellite receivers, the LNBK is a monolithic linear voltage regulator, assembled in Multiwatt-15, PowerSO-20 and PowerSO-10, specifically designed to provide the powering voltages and the interfacing signals to the LNB downconverter situated in the antenna via the coaxial cable. It has the same functionality of the LNBP1X and LNBP20 series, at a reduced output current capability. Since most satellite receivers have two antenna ports, the output voltage of the regulator is available at one of two logic-selectable output pins (LNBA, LNBB). When the IC is powered and put in Stand-by (EN pin LOW), both regulator outputs are disabled to allow the antenna downconverters to be supplied/controlled by others satellite receivers sharing the same coaxial lines. In this occurrence the device will limit at 3 mA (max) the backward current that could flow from LNBA and LNBB output pins to GND.

■ REDUCED OUTPUT CURRENT VERSION OF LNBP1X AND LNBP20 SERIES

■ COMPLETE INTERFACE FOR TWO LNBs REMOTE SUPPLY AND CONTROL

■ LNB SELECTION AND STAND-BY FUNCTION

■ BUILT-IN TONE OSCILLATOR FACTORY TRIMMED AT 22KHz

■ FAST OSCILLATORSTART-UP FACILITATES DiSEqC? ENCODING

■ TWO SUPPLY INPUTS FOR LOWEST DISSIPATION

■ BYPASS FUNCTION FOR SLAVE OPERATION

■ LNB SHORT CIRCUIT PROTECTION AND DIAGNOSTIC

■ AUXILIARY MODULATION INPUT EXTENDS FLEXIBILITY

■ CABLE LENGTH COMPENSATION

■ INTERNAL OVER TEMPERATURE PROTECTION

■ BACKWARD CURRENT PROTECTION