Part # LNBH221 datasheet

Part Manufacturer: ST Microelectronics

ST Microelectronics

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


Part Details:

LNBH221 Dual LNB supply and control IC with Step-Up converter and I²C interface Feature summary I All the features are the same for both section I Complete and independent interface between LNBS and relevant I2CTM BUS I BUILT-IN DC/DC controller for single 12V supply operation and high efficiency (Typ. 93% @ 500mA) I LNB output current guaranteed up to 500mA I Both compliant with eutelsat and directv output voltage specification accurate BUILT-IN POWER SO-36 22KHz tone oscillator suits widely accepted standards I Fast oscillator start-up facilitates DiSEqCTM encoding I BUILT-IN 22KHz tone detector supports bi- assembled in POWER SO-36, specifically directional DiSEqCTM 2.0 designed to provide the power 13/18V, and the I Semi-lowdrop post regulator and high 22KHz tone signalling for two independent LNB efficiency step-up pwm for low power loss: Typ. down converters or to a multiswitch box that could 0.56W @ 125mA be independently powered and set. In thisapplication field, it offers a complete solution with I Two output pins suitable to bypass the output r- extremely low component count, low power l filter and avoid any tone distorsion (R-L filter dissipation together with simple design and I2CTM as per DiSEqC 2.0 SPECs, see application standard interfacing. circuit on pag. 7, 8) I Overload and over-temperature internal protections I Overload and over-temperature I2C diagnostic BITs I LNB short circuit soa protection with I2C diagnostic bit I +/- 4KV ESD tolerant on input/output power pins Description Intended for analog and digital DUAL SatelliteSTB receivers/SatTV, sets/PC cards, theLNBH221 is a voltage regulator and interface IC, February 2006 Rev. 5 1/27 www.st.com 27 LNBH221 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4


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LNBH221.pdf Datasheet