Description
The STEVAL-CBL009V1 demonstration board implements a DC-DC converter based on ST’s LNBH25 device. It is used to power LNBs in dish antennas to receive satellite TV signals. It provides good performance at low cost using a low external component count, and includes all functions needed for supplying/interfacing LNB modules in accordance with international standards. The device includes an I2C bus interface and, thanks to a fully integrated step-up DC-DC converter, it works with a single input voltage supply ranging from 8 V to 16 V.

Features
■ 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
■ 22 kHz tone waveform integrity guaranteed also in no load condition
■ Low-drop post regulator and high efficiency step-up PWM with integrated power N-MOS for low power loss
■ LPM (low power mode) function to reduce dissipation
■ Overload and overtemperature internal protection with I2C diagnostic bits
■ LNB short-circuit dynamic protection
■ DiSEqC 1.x communication
■ RoHS compliant