LNBH25S:LNB supply and control IC with step-up and I²C interface

Intended for analog and digital satellite receivers/Sat-TV and Sat-PC cards, the LNBH25S is a monolithic voltage regulator and interface IC, assembled in QFN24L (4x4 mm) specifically designed to provide 13/18 V power supply and 22 kHz tone signaling to the LNB down-converter in the antenna dish or to the multi-switch box. In this application field, it offers a complete solution with extremely low component count and low power dissipation together with a simple design and I²C standard interface.

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% @ 0.5 A)
  • Selectable output current limit by external resistor
  • Compliant with main satellite receiver output voltage specifications (15 programmable levels)
  • Accurate built-in 22 kHz tone generator suits widely accepted standards
  • 22 kHz tone waveform integrity guaranteed at no-load condition
  • Low drop post regulator and high efficiency step-up PWM with integrated power NMOS allowing low power losses
  • LPM function (low power mode) to reduce dissipation
  • Overload and overtemperature internal protections with I²C diagnostic bits
  • LNB short-circuit dynamic protection
  • +/- 4 kV ESD tolerant on output power pins
产品规格
DescriptionVersionSize
DS10502: LNB supply and control IC with step-up and I²C interface3.01 MB
手册
DescriptionVersionSize
Brochure Power management guide05.20167 MB
Peripheral semiconductors for set-top box applications4.3633 KB
解决方案评估工具
型号制造商Description
STEVAL-LNBH02STPower supply evaluation board for LNB based on the LNBH25S
STEVAL-LNBH03STPower supply evaluation board for LNB based on the LNBH25S
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
LNBH25SPQRQFN-24LTape And Reel0.8631000NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
LNBH25SPQRQFN-24LIndustrialEcopack2md_nd-wspc-vfqfpn-wspc-4x4x1.0-wspc-24-wspc-pitch-wspc-0.5_rynd-wspc-u1b8ab5_vers2_sdm_signed.pdf
md_nd-wspc-vfqfpn-wspc-4x4x1.0-wspc-24-wspc-pitch-wspc-0.5_rynd-wspc-u1b8ab5_vers2.xml
LNB supply and control IC with step-up and I²C interface LNBH25S
Very low drop voltage regulators with inhibit KFXX
3 A DC step-down switching regulator ST1S40
md_nd-wspc-vfqfpn-wspc-4x4x1.0-wspc-24-wspc-pitch-wspc-0.5_rynd-wspc-u1b8ab5_vers2_sdm_signed.pdf LNBH25S
md_nd-wspc-vfqfpn-wspc-4x4x1.0-wspc-24-wspc-pitch-wspc-0.5_rynd-wspc-u1b8ab5_vers2.xml LNBH25S