代理產線

ST LNBH26PQR

 2013-01-23

【基本資料】

【產品特性】

 


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 (15 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


■ LPM function (low power mode) to reduce


dissipation


■ Overload and overtemperature internal


protection with I²C diagnostic bits


■ LNB short-circuit dynamic protection


■ +/- 4 kV ESD tolerant on output power pins


Dual LNBS supply and control IC with step-up and
I²C interface


【產品應用】

STB satellite receivers


■ TV satellite receivers


■ PC card satellite receivers

【文字介紹】

Intended for analog and digital dual satellite


receivers/Sat-TV, and Sat-PC cards, the LNBH26


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 extremely low


component count, low power dissipation together


with simple design and I²C standard interfacing.