DiSEqC 1.X-compliant single LNB supply and control IC based on the LNBH25

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1 - 2$44.100%
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Parameter NameParameter Value
Target ApplicationSet Top Box
Core ProductLNBH25
Packing TypeNot Applicable
RoHs compliantEcopack2
Package NameCARD

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.

Key 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