LNBH25LSPQR STMicroelectronics

LNBH25LS LNB supply and control IC with step-up and IC interface Datasheet - production data Overload and overtemperature internal protections 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 Description Intended for analog and digital satellite Features receivers/Sat-TV and Sat-PC cards, the LNBH25LS is a monolithic voltage regulator and Complete interface between LNB and IC interface IC, assembled in QFN24L (4x4 mm) bus specifically designed to provide 13/18 V power Built-in DC-DC converter for single 12 V supply and 22 kHz tone signaling to the LNB supply operation and high efficiency (typ. down-converter in the antenna dish or to the 93% 0.5 A) multi-switch box. In this application field, it offers Selectable output current limit by external a complete solution with extremely low resistor component count and low power dissipation Compliant with main satellite receiver output together with a simple design and IC standard voltage specifications (15 programmable interface. levels) Accurate built-in 22 kHz tone generator suits Table 1: Device summary widely accepted standards Order code Package Packing 22 kHz tone waveform integrity guaranteed Tape and at no-load condition LNBH25LSPQR QFN24L (4x4 mm) reel Low drop post regulator and high efficiency step-up PWM with integrated power NMOS allowing low power losses March 2016 DocID026753 Rev 3 1/30 www.st.com This is information on a product in full production. Contents LNBH25LS Contents 1 Block diagram .................................................................................. 6 2 Application information .................................................................. 7 2.1 DiSEqC data encoding (DSQIN pin) ................................................. 7 2.2 Data encoding by external 22 kHz tone TTL signal ........................... 7 2.3 Data encoding by external DiSEqC envelope control through the DSQIN pin ...................................................................................................... 8 2.4 Output current limit selection ............................................................. 8 2.5 Output voltage selection .................................................................... 8 2.6 Diagnostic and protection functions .................................................. 8 2.7 Surge protections and TVS diodes .................................................... 9 2.8 Power-on IC interface reset and undervoltage lockout .................... 9 2.9 PNG: input voltage minimum detection ............................................. 9 2.10 COMP: boost capacitors and inductor ............................................... 9 2.11 OLF: overcurrent, short-circuit protection and diagnostic .................. 9 2.12 OTF: thermal protection and diagnostic .......................................... 10 3 Pin configuration ........................................................................... 11 4 Maximum ratings ........................................................................... 13 5 Typical application circuits ........................................................... 14 6 IC bus interface ............................................................................ 16 6.1 Data validity..................................................................................... 16 6.2 Start and stop condition .................................................................. 16 6.3 Byte format ...................................................................................... 16 6.4 Acknowledge ................................................................................... 16 6.5 Transmission without acknowledge ................................................. 16 7 IC interface protocol .................................................................... 18 7.1 Write mode transmission ................................................................. 18 7.2 Read mode transmission ................................................................ 18 7.3 Data registers .................................................................................. 19 7.4 Status registers ............................................................................... 22 8 Electrical characteristics .............................................................. 23 9 Package information ..................................................................... 26 9.1 QFN24L (4x4 mm) package information ......................................... 27 2/30 DocID026753 Rev 3