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LNBH25S Datasheet LNB-supply / controller

Manufacturer: STMicroelectronics

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General Description

Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH25S is a monolithic voltage regulator and interface IC, assembled in QFN24L (4x4 mm) specifically designed to provide 13/18 V power supply and 22 kHz tone signaling to the LNB down-converter in the antenna dish or to the multi-switch box.

In this application field, it offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard interface.

Order code Table 1: Device summary Package Packing LNBH25SPQR QFN24L (4x4) Tape and reel October 2016 DocID026736 Rev 3 This is information on a product in full production.

Overview

LNBH25S LNB supply and control IC with step-up and I²C interface Datasheet - production data  Low drop post regulator and high efficiency step-up PWM with integrated power NMOS allowing low power losses  LPM function.

Key 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 (15 programmable levels).
  • Accurate built-in 22 kHz tone generator suits widely accepted standards.
  • 22 kHz tone waveform integrity guaranteed at no-load condition.

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