LNBH24L - STMicroelectronics

LNBH24L Dual LNBS supply/controller

Intended for analog and digital DUAL satellite receivers/Sat-TV, Sat-PC cards, the LNBH24L is a monolithic voltage regulator and interface IC, assembled in QFN 5x5 ePAD, specifically designed to provide the 13 / 18 V power supply and the 22 kHz tone signaling for two independent LNB down-converters in the antenna dishes and/or multi-switch box. In this appli.

Features

■ Complete interface between LNBS 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
■ Auxiliary modulation input (EXTM) facilitates DiSEqC™ 1.X encoding
■ Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS allow low power losses
■ Overload and over-temperature internal protections with I²C diagnostic bits
■ Output voltage and output current level diagnostic feedback by I²C bits
■.