LNBH29QTR STMicroelectronics

LNBH29 LNB supply and control IC with step-up and IC interface Datasheet - production data 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 IC diagnostic bits LNB short-circuit dynamic protection +/- 4 kV ESD tolerant on output power pins Applications QFN16 (4x4) / (3x3) STB satellite receivers TV satellite receivers PC card satellite receivers Features Description Complete interface between LNB and IC bus Intended for analog and digital satellite Built-in DC-DC converter for single 12 V supply receivers/Sat-TV and Sat-PC cards, the LNBH29 operation and high efficiency (typ. 93% series is a monolithic voltage regulator and 0.5 A) interface IC, assembled in QFN16 (3x3) and Selectable output current limit by external QFN16 (4x4) specifically designed to provide the resistor 13 / 18 V power supply and the 22 kHz tone signaling to the LNB down-converter in the Compliant with main satellite receiver output antenna dish or to the multi-switch box. In this voltage specifications application field, it offers a complete solution with Accurate built-in 22 kHz tone generator suits extremely low component count, low power widely accepted standards dissipation together with a simple design and IC EXTM pin, auxiliary 22 kHz modulation input standard interfacing. (LNBH29E) extends design flexibility 22 kHz tone waveform integrity guaranteed also at no load condition Table 1. Device summary Order codes Packages Packaging LNBH29PTR QFN16 (3x3) Tape and reel LNBH29EPTR QFN16 (3x3) Tape and reel LNBH29QTR QFN16 (4x4) Tape and reel LNBH29EQTR QFN16 (4x4) Tape and reel March 2013 DocID023065 Rev 3 1/31 This is information on a product in full production. www.st.com 31Contents LNBH29 Contents 1 Block diagram 3 2 Application information 4 2.1 DiSEqC data encoding 4 2.2 LNBH29: data encoding by external DiSEqC envelope control through the DSQIN pin 4 2.3 LNBH29E: DISEQC data encoding by external 22 kHz signal connected to the EXTM pin 5 2.4 Output current limit selection . 5 2.5 Output voltage selection . 5 2.6 Diagnostic and protection functions 5 2.7 Surge protection and TVS diodes . 6 2.8 VMON: output voltage diagnostic 6 2.9 PDO: overcurrent detection on output pull-down stage . 6 2.10 Power-on IC interface reset and undervoltage lockout . 6 2.11 PNG: input voltage minimum detection . 7 2.12 COMP: boost capacitors and inductor 7 2.13 OLF: overcurrent and short-circuit protection and diagnostic . 7 2.14 OTF: thermal protection and diagnostic . 7 3 Pin configuration 8 4 Maximum ratings . 10 5 Typical application circuits 11 6 IC bus interface . 13 6.1 Data validity . 13 6.2 Start and stop condition 13 6.3 Byte format 13 6.4 Acknowledge 13 6.5 Transmission without acknowledge . 13 2/31 DocID023065 Rev 3