STMicroelectronics LNB Supply & Control Evaluation Boards

STMicroelectronics LNB Supply and Control Evaluation Boards provide a reference design for powering the LNB (Low Noise Block) supply ICs intended for analog and digital satellite receivers, satellite TV, and satellite PC applications. LNB supply ICs are highly-efficient monolithic linear and switching ICs specifically designed to provide both power and interface signals to the LNB downconverter placed on the antenna dish, via the coaxial cable. The LNB Supply and Control Evaluation Boards implement a DC-DC converter based on the LNBH25L or LNBH29 device used to power LNB inside dish antennas which receive satellite TV signals.

Features

Complete interface between LNB and I²C bus
Key components
- STEVAL-CBL013V1: LNBH25L LNB Supply and Control IC
- STEVAL-CBL016V1 and STEVAL-CBL015V1: LNBH29 LNB Supply and Control IC
Built-in DC-DC converter for single 12V supply operation and high efficiency (typ. 93% @ 0.5A)
Selectable output current limit using an external resistor

Accurate built-in 22kHz tone generator suits widely-accepted standards
22kHz 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
Overload and overtemperature internal protection with I²C diagnostic bits
LNB short-circuit dynamic protection
RoHS compliant

Software

LNBH25-36 GUI is a Windows-based Graphic User Interface (GUI) software designed to read, check, change, and write all the internal registers of the target LNB IC. This software simplifies the control of the register table due to ease-of-use. All the target device's parameters are programmable through slider, check-LED, and text controls in the GUI. The LNBH25-36 GUI communicates with the Evaluation Board through an ST USB-GPIO interface that provides the correct protocol to drive the target device.