Date: 05/02/2010

New LNB controller IC devices for direct broadcast satellite apps

Diodes Inc. has released a six new controller ICs to increase efficiency and the reliability of LNB designs while reducing PCB size for direct broadcast satellite (DBS) applications.

The new controllers offers more accurate and flexible control and internal filtering, to eliminate false switching and support a wide range of set-top box designs and specifications.

The ZNBG3118 provides bias control and protection for up 3 GaAs and HEMT FET low
noise amplifiers. This controller integrates an accurate voltage detector for LNB polarization channel selection and an advanced tone detector for local oscillator selection for band switching.

ZABG4002 and ZABG6002 are low power fixed bias controllers for 4 and 6 stage FET low noise amplifiers, providing each FET with an independent protected negative gate voltage and positive drain voltage with user programmable drain current selectable from 0 to 15mA.

The ZLNB2015 and ZLNB2016 advanced DBS dual voltage and tone detectors are optimized for low supply current and wide operating voltage, both devices also offer high interference rejection while keeping application cost down.

The ZLNB254 IC is a dual channel DiSEqC interface for LNBs and satellite distribution systems that provides two high accurate DiSEqC detectors, which converts the DiSEqC signals into logic level representations enabling simple and reliable processor monitoring.

For more details visit www.diodes.com