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LNBH26LPQR Scheda tecnica(PDF) 1 Page - STMicroelectronics |
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LNBH26LPQR Scheda tecnica(HTML) 1 Page - STMicroelectronics |
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1 / 28 page  March 2012 Doc ID 022876 Rev 1 1/28 28 LNBH26L Dual 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% @ 0.5 A) ■ Selectable output current limit by external resistor ■ Compliant with main satellite receiver output voltage specification (8 programmable levels) ■ Accurate built-in 22 kHz tone generator suits widely accepted standards ■ 22 kHz tone waveform integrity guaranteed also at no load condition ■ Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS allowing low power losses ■ Overload and overtemperature internal protection with I²C diagnostic bits ■ LNB short-circuit dynamic protection ■ +/- 4 kV ESD tolerant on output power pins Applications ■ STB satellite receivers ■ TV satellite receivers ■ PC card satellite receivers Description Intended for analog and digital DUAL satellite receivers/Sat-TV, Sat-PC cards, the LNBH26L is a monolithic voltage regulator and interface IC, assembled in QFN24 (4x4) specifically designed to provide the 13 / 18 V power supply and the 22 kHz tone signalling to the LNB down-converter in the antenna dishes or to the multi-switch box. In this application field, it offers a complete solution for dual tuner satellite receivers with an extremely low component count and low power dissipation together with simple design and I²C standard interfacing. QFN24 (4x4 mm) Table 1. Device summary Order code Package Packaging LNBH26LPQR QFN24 (4x4) Tape and reel www.st.com |
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