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LNBH23L Datasheet(PDF) 1 Page - STMicroelectronics |
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LNBH23L Datasheet(HTML) 1 Page - STMicroelectronics |
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1 / 25 page  November 2010 Doc ID 15335 Rev 4 1/25 25 LNBH23L LNB 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 receivers output voltage specification ■ Auxiliary modulation input (EXTM pin) facilitates DiSEqC™ 1.X encoding ■ Accurate built-in 22 kHz tone generator suits widely accepted standards ■ Low-drop post regulator and high efficiency step-up PWM with integrated power NMOS allow low power losses ■ Overload and over-temperature internal protections 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 satellite receivers, the LNBH23L is a monolithic voltage regulator and interface IC, assembled in QFN32 5 x 5 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 (5 x 5 mm) (Exposed pad) Table 1. Device summary Order code Package Packaging LNBH23LQTR QFN32 (5 x 5 mm) Exposed pad Tape and reel www.st.com |
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