LNBH26SPQR STMicroelectronics

LNBH26S Datasheet Dual LNBS supply and control IC with step-up and IC interface Features Complete interface between LNB and IC 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 (15 programmable levels) Accurate built-in 22 kHz tone generator suits widely accepted standards 22 kHz tone waveform integrity guaranteed at no-load condition as well Low drop post regulator and high efficiency step-up PWM with integrated power NMOS allowing low power losses LPM function (low power mode) to reduce dissipation Overload and overtemperature internal protection with IC 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 Maturity status link Description LNBH26S Intended for analog and digital dual satellite receivers/Sat-TV, and Sat-PC cards, the Device summary LNBH26S is a monolithic voltage regulator and interface IC, assembled in QFN24 4 x 4 specifically designed to provide the 13/18 V power supply and the 22 kHz tone Order code LNBH26SPQR signaling to the LNB down-converter in the antenna dishes or to the multi-switch box. Package QFN24 (4 x 4) 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 Packing Tape and reel design and IC standard interfacing. DS8975 - Rev 5 - June 2018 www.st.com For further information contact your local STMicroelectronics sales office.LNBH26S Block diagram 1 Block diagram Figure 1. Block diagram DSQIN-A ADDR SCL SDA DSQIN-B LX-A LX-B IC digital core DAC Drop control PGND PGND Tone ctrl Diagnostics VUP-A VUP-B Protections Linear Linear VOUT-A VOUT- B regulator regulator DETIN -A DETIN-B Tone Tone detector DSQOUT-A detector DSQOUT-B Current limit selection BPSW -A BPSW-B Voltage reference FLT ISEL GND BYP VCC GIPG2201151303LM DS8975 - Rev 5 page 2/35 Isense Gate ctrl PWM CTRL PWM CTRL Gate ctrl Isense