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LNBH23PPR 数据表(PDF) 1 Page - STMicroelectronics |
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LNBH23PPR 数据表(HTML) 1 Page - STMicroelectronics |
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1 / 32 page  March 2008 Rev 4 1/32 32 LNBH23 LNBs supply and control IC with step-up and I²C interface Features ■ Complete interface between LNB and I²C bus ■ Built-in DC-DC converter for single 12 V supply operation and high efficiency (Typ. 93% @ 0.75 A), with integrated NMOS ■ Selectable output current limit by external resistor ■ Compliant with main satellite receiver systems specifications ■ New accurate built-in 22 kHz tone generator suits widely accepted standards (patent pending) see Figure 1 and Figure 4 ■ Fast oscillator start-up facilitates DiSEqCTM encoding ■ Built-in 22 kHz tone detector supports bi- directional DiSEqCTM 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 to by-pass the output R-L filter and avoid any tone distortion (R-L filter as per DiSEqCTM 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 satellite receivers/Sat-TV, sat-PC cards, the LNBH23 is a monolithic voltage regulator and interface IC, assembled in PowerSSO-24 ePAD and QFN32 (5x5 mm) ePAD, specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling 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, low power dissipation together with simple design and I²C standard interfacing. QFN32 (5x5mm) (Exposed pad) PowerSSO-24 (Exposed pad) Table 1. Device summary Order code Package Packaging LNBH23PPR PowerSSO-24 (Exposed pad) Tape and reel LNBH23QTR (1) QFN32 (Exposed pad) Tape and reel 1. Available on request. www.st.com |
类似零件编号 - LNBH23PPR |
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类似说明 - LNBH23PPR |
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