STEVAL-LNBH02:Power supply evaluation board for LNB based on the LNBH25S

This evaluation board implements a DC-DC converter based on the LNBH25S device. It is used to power LNBs inside dish antennas to receive satellite TV signals.

The LNBH25S is an integrated solution for supplying / interfacing satellite LNB modules in accordance with international standards. It is a simple and complete solution for dual tuner satellite receivers and provides high performance at low cost with a low external component count.

The LNBH25S evaluation board includes an I²C bus interface and an internal 22 kHz tone generator which is factory trimmed and can be controlled by the DSQIN pin (TTL compatible), allowing immediate DiSEqC™ data encoding.

Thanks to a fully integrated step-up DC-DC converter, it functions with a single input voltage supply source 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% at 0.5 A)
  • Selectable output current limit by external resistor
  • Compliant with main satellite receivers output voltage specification (15 programmable levels)
  • Accurate built-in 22 kHz tone generator suits widely accepted standards
  • 22 kHz tone waveform integrity guaranteed also at no load condition
  • Low drop post regulator and high efficiency step-up PWM with integrated power N-MOS for low power losses
  • LPM function (low power mode) to reduce dissipation
  • Overload and overtemperature internal protection with I²C diagnostic bits
  • LNB short-circuit dynamic protection
  • +/- 4 kV ESD tolerant on output power pins
  • RoHS compliant
Product Specifications
DescriptionVersionSize
DB3024: Power supply evaluation board for LNB based on the LNBH25S1.0235 KB
Board Manufacturing Specifications
DescriptionVersionSize
STEVAL-LNBH02 gerber files1.0171 KB
Bill of Materials
DescriptionVersionSize
STEVAL-LNBH02 BOM1.027 KB
Schematic Packs
DescriptionVersionSize
STEVAL-LNBH02 schematics1.038 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Evaluation Tool Software
Part NumberManufacturerDescription
STSW-LNBH01STWindows GUI for debugging the LNBH25xx and LNBH26xx LNB supply and control ICs via IAA?C bus
Sample & Buy
Part NumberCore ProductUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
STEVAL-LNBH02LNBH25S34.301NECEAR99-
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
STEVAL-LNBH02CARDIndustrialEcopack2
Power supply evaluation board for LNB based on the LNBH25S STEVAL-LNBH02
Power supply evaluation board for LNB based on the LNBH25S STEVAL-LNBH02
Power supply evaluation board for LNB based on the LNBH25S STEVAL-LNBH02
Power supply evaluation board for LNB based on the LNBH25S STEVAL-LNBH02
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2