The LNBH23L is an integrated solution for supplying/interfacing satellite LNB modules. It gives good performance in a simple and cheap way, with minimum external components necessary. It includes all functions needed for LNB supplying and interfacing, in accordance with international standards. Moreover, it includes an I²C bus interface and, thanks to a fully integrated step-up DC-DC converter, it functions with a single input voltage supply ranging from 8 V to 15 V.
This document provides application information for the LNBH23L, an integrated solution designed to supply and interface satellite LNB modules. It details the device's internal blocks, including a built-in step-up DC-DC converter, pre-regulator, and I2C interface for diagnostics and control. The note explains how to implement DiSEqC 1.X communication using the EXTM or VoTX pins.
| Input voltage range | 8 V to 15 V |
|---|---|
| Undervoltage lockout threshold | 6.7 V typ |
| Power-on reset threshold | 7.3 V typ |
| Over temperature flag threshold | 150 °C |
| Package type | QFN-32 |
The EXTM pin is an analog input used to generate the 22 kHz tone superimposed to the VoRX DC output voltage.
The I2C address is selected by setting the voltage level of the dedicated ADDR pin.