LNBH25: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 LNBH25 is a monolithic voltage regulator and interface IC, assembled in QFN24 4x4 specifically designed to provide the 13/18 V power supply and the 22 kHz tone signalling 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 interfacing.

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 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 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
DS8729: LNB supply and control IC with step-up and I²C interface4.01 MB
应用手册
DescriptionVersionSize
AN4175: LNBH25 supply and control IC with step-up and I²C interface2.11 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-CBL009V1DiSEqC 1.X-compliant single LNB supply and control IC based on the LNBH25
STEVAL-CBL010V1STSingle LNB supply and control IC DiSEqC 2.0 compliant based on LNBH25
样片和购买
型号PackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
LNBH25PQRQFN-24LTape And Reel0.7681000NECEAR99MALAYSIA
质量和可靠性
型号PackageGradeRoHS Compliance GradeMaterial Declaration**
LNBH25PQRQFN-24LIndustrialEcopack2md_nd_vfqfpn-wspc-4x4x1_24l_mynd-wspc-ua28ab5.pdf
md_nd_vfqfpn-wspc-4x4x1_24l_mynd-wspc-ua28ab5.xml
LNB supply and control IC with step-up and I²C interface LNBH25
LNBH25 supply and control IC with step-up and I²C interface LNBH25
Very low drop voltage regulators with inhibit KFXX
3 A DC step-down switching regulator ST1S40
md_nd_vfqfpn-wspc-4x4x1_24l_mynd-wspc-ua28ab5.pdf LNBH25
md_nd_vfqfpn-wspc-4x4x1_24l_mynd-wspc-ua28ab5.xml LNBH25