Part # LNBH21 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

Part Description: NB supply and control IC with step-up converter and I²C interface


Part Details:

LNBH21 LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE s COMPLETE INTERFACE BETWEEN LNBAND I2CTM BUS s BUILT-IN DC/DC CONTROLLER FORSINGLE 12V SUPPLY OPERATION ANDHIGH EFFICIENCY (Typ. 94% @ 750mA) s TWO SELECTABLE OUTPUT CURRENTLIMIT (450mA / 750mA) PowerSO-20 s BOTH COMPLIANT WITH EUTELSAT ANDDIRECT OUTPUT VOLTAGESPECIFICATION s OVERLOAD AND OVER-TEMPERATURE I2CDIAGNOSTIC BITs s ACCURATE BUILT-IN 22KHz TONEOSCILLATOR SUITS WIDELY ACCEPTED s LNB SHORT CIRCUIT SOA PROTECTIONWITH I2C DIAGNOSTIC BIT STANDARDS s +/- 4KV ESD TOLERANT ON INPUT/ s FAST OSCILLATOR START-UP FACILITATES OUTPUT POWER PINS DiSEqCTM ENCODING s BUILT-IN 22KHz TONE DETECTOR DESCRIPTION SUPPORTS BI-DIRECTIONAL DiSEqCTM2.0 Intended for analog and digital satellite STB s SEMI-LOWDROP POST REGULATOR AND receivers/SatTV, sets/PC cards, the LNBH21 is a HIGH EFFICIENCY STEP-UP PWM FOR monolithic voltage regulator and interface IC, LOW POWER LOSS: Typ. 0.56W @ 125mA assembled in POWER SO-20, specifically s TWO OUTPUT PINS SUITABLE TO BYPASS designed to provide the 13/18V power supply and THE OUTPUT R-L FILTER AND AVOID ANY the 22KHz tone signalling to the LNB TONE DISTORSION (R-L FILTER AS PER downconverter in the antenna or to the multiswitch DiSEqC 2.0 SPECs, see application circuit on


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LNBH21.pdf Datasheet