LNBH26 - STMicroelectronics

LNBH26 Dual LNBS supply/controller

Intended for analog and digital dual satellite receivers/Sat-TV, and Sat-PC cards, the LNBH26 is a monolithic voltage regulator and interface IC, assembled in QFN24 4x4 specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dishes or to the multi-switch box. In this application field,.

Features

■ Complete interface between LNB and I²C bus
■ Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% @ 0.5 A)
■ Selectable output current limit by external resistor
■ Compliant with main satellite receivers output voltage specification (15 programmable levels)
■ Accurate built-in 22 kHz tone generator suits widely accepted standards
■ 22 kHz tone waveform integrity guaranteed also at no load condition
■ Low drop post regulator and high efficiency step-up PWM with integrated power N-MOS allowing low power losses
■ LPM function (low power mode) to reduce dissipa.