LNB Supply and Control IC 16-Pin QFN T/R

Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH29 series is a monolithic voltage regulator and interface IC, assembled in QFN16 (3x3) and QFN16 (4x4) specifically designed to provide the 13 / 18 V power supply and the 22 kHz tone signaling 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 a simple design and I²C standard interfacing.

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 receiver output voltage specifications

Accurate built-in 22 kHz tone generator suits widely accepted standards

EXTM pin, auxiliary 22 kHz modulation input (LNBH29E) extends design flexibility

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

Overload and overtemperature internal protection with I²C diagnostic bits

LNB short-circuit dynamic protection

+/- 4 kV ESD tolerant on output power pins