LNBH25L - STMicroelectronics

LNBH25L LNB supply/controller

Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH25L 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 Table 1. Device summary Order code Package LNBH25LPQR QFN24 (4 x 4) Packaging Tape and reel Feb.

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 receiver output voltage specifications
■ 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
■ Overload and overtemperature internal protection with I²C diagnostic bit.