LNBH23 - STMicroelectronics

LNBH23 LNBs supply/controller

Intended for analog and digital satellite receivers/sat-TV, sat-PC cards, the LNBH23 is a monolithic voltage regulator and interface IC, assembled in PowerSSO-24 ePAD and QFN32 (5 x 5 mm.) ePAD, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dish or to the multi-switch box. In.

Features

■ Complete interface between LNB and I²C bus
■ Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% @ 0.75 A), with integrated NMOS
■ Selectable output current limit by external resistor
■ Compliant with main satellite receiver systems specifications
■ New accurate built-in 22 kHz tone generator suits widely accepted standards (patent pending)
■ Fast oscillator start-up facilitates DiSEqC™ encoding
■ Built-in 22 kHz tone detector supports bidirectional DiSEqC™ 2.0
■ Very low-drop post regulator and high efficiency step-up PWM with integrated power NMOS allow .