STMicroelectronics LNB 供电 & 控制评估板

STMicroelectronics LNB 供电 & 控制评估板提供一个基于 LNBH25L 和 LNBH29 器件的直流-直流转换器，LNBH25L 和 LNBH29 器件用于给接收卫星电视信号的蝶形天线内的 LNB 供电。 STEVAL-CBL012V1 评估板包含一个 I2C 总线接口，内部的 22kHz 音频发生器（经过出厂调整）由 DSQIN 引脚（TTL 兼容）控制，从而实现直接的 DiSEqC™ 数据编码。LNBH29 是一款集成的解决方案，用于根据国际标准提供/连接卫星 LNB 模块，为单调谐器卫星接收器提供了完整的解决方案，并仅需少量外部元件，以较低成本提供优秀性能。STEVAL-CBL015V1 评估板包含一个 I2C 总线接口，内部的 22kHz 音频发生器（经过出厂调整）由 DSQIN 引脚（TTL 兼容）控制，从而实现直接的 DiSEqC™ 数据编码。STEVAL-CBL016V1LNBH29 评估板包含一个 I2C 总线接口，并配备了 EXTM 模拟调制输入引脚，可连接一个 22kHz DiSEqC 外部语音源。语音输出波形取决于 EXTM 引脚所提供外部信号的特性。

特性

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.