LNBH221 - STMicroelectronics

LNBH221 DUAL LNB SUPPLY/CONTROLLER

Intended for analog and digital DUAL Satellite STB receivers/SatTV, sets/PC cards, the LNBH221 is a voltage regulator and interface IC, assembled in POWER SO-36, specifically designed to provide the power 13/18V, and the 22KHz tone signalling for two independent LNB down converters or to a multiswitch box that could be independently powered and set. In this .

Features

ARE THE SAME FOR BOTH SECTION COMPLETE AND INDEPENDENT INTERFACE BETWEEN LNBs AND RELEVANT I2CTM BUS BUILT-IN DC/DC CONTROLLER FOR SINGLE 12V SUPPLY OPERATION AND HIGH EFFICIENCY (Typ. 93% @ 500mA) LNB OUTPUT CURRENT GUARANTEED UP TO 500mA BOTH COMPLIANT WITH EUTELSAT AND DIRECTV OUTPUT VOLTAGE SPECIFICATION ACCURATE BUILT-IN 22KHz TONE OSCILLATOR SUITS WIDELY ACCEPTED STANDARDS FAST OSCILLATOR START-UP FACILITATES DiSEqCTM ENCODING BUILT-IN 22KHz TONE DETECTOR SUPPORTS BI-DIRECTIONAL DiSEqCTM 2.0 SEMI-LOWDROP POST REGULATOR AND HIGH EFFICIENCY STEP-UP PWM FOR LOW POWER LOSS: Typ. 0.56W @ 125m.