LNBH26 Dual LNB Supply and Control IC Evaluation Board

STM-STEVAL-CBL012V1-EVAL product evaluation board implements a DCDC converter based on the LNBH25 device used to power LNBs inside dish antennas which receive satellite TV signals. The LNBH25 is an integrated solution for supplying/interfacing satellite LNB modules in accordance with international standards, offering a complete solution for single tuner satellite receivers and good performance at low cost using few external components. The LNBH25 evaluation board includes an I2 C bus interface and the internal 22 kHz tone generator (factory trimmed) is controlled by the DSQIN pin (TTL compatible), permitting immediate DiSEqC™ data encoding. A fully integrated step-up DC-DC converter allows operation with a single input voltage supply source ranging from 8 V to 16 V. Complete interface between LNB and I2 C bus Built-in DC-DC converter for single 12 V supply operation and high efficiency (typ. 93% at 0.5 A) Selectable output current limit using an external resistor Compliant with main satellite receiver output voltage specifications (15 programmable levels) Accurate built-in 22 kHz tone generator suits widely accepted standards 22 kHz tone waveform integrity guaranteed also at no load Low-drop post-regulator and high-efficiency step-up PWM with integrated power N-MOS allowing low power losses LMP function (low-power mode) to reduce dissipation Overload and overtemperature internal protection with I2 C diagnostic bits LNB short-circuit dynamic protection RoHS compliant