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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LNBH24 датащи(PDF) 1 Page - STMicroelectronics |
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LNBH24 датащи(HTML) 1 Page - STMicroelectronics |
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1 / 30 page  February 2008 Rev 1 1/30 30 LNBH24 Dual LNB supply and control IC with step-up and I2C interface Features ■ Complete interface between LNBS 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 through external resistor ■ Compliant with main satellite receivers output voltage specification ■ New accurate built-in 22 kHz tone generator meets widely accepted standards (patent pending) ■ Fast oscillator start-up facilitates DiSEqC™ encoding ■ Built-in 22 kHz tone detector supports bi- directional DiSEqC™ 2.0 ■ Very low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS allow low power losses ■ Two output pins suitable for bypassing the output R-L filter and avoiding tone distortion (R- L filter as per DiSEqC™ 2.0 specs, see typ. application circuits) ■ Overload and over-temperature internal protections with I²C diagnostic bits ■ Output voltage and output current level diagnostic feedback by I²C bits ■ LNB short circuit dynamic protection ■ +/- 4 kV ESD tolerant on output power pins Description Intended for analog and digital DUAL Satellite receivers/Sat-TV, sat-PC cards, the LNBH24 is a monolithic voltage regulator and interface IC, assembled in PowerSSO-36 ePad, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling for two independent LNB down-converters in the antenna dishes and/or multi-switch box. In this application field, it offers a dual tuner STBs with extremely low component count, low power dissipation together with simple design and I2C standard interfacing. PowerSSO-36 (ePad) Table 1. Device summary Order code Package Packaging LNBH24PPR PowerSSO-36 (Exposed pad) Tape and reel www.st.com |
Аналогичный номер детали - LNBH24 |
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Аналогичное описание - LNBH24 |
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