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DiSEqC 1.X compatible single LNB power and control IC based on LNBH25

STEVAL-CBL009V1

Overview

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.

Main 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

Design Files

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Update:2025-06-20 11:01:53

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