|
LNBH25S Datasheet, PDF (1/37 Pages) STMicroelectronics – LNB supply and control IC with step-up and IC interface | |||
|
LNBH25S
LNB supply and control IC with step-up and I²C interface
Datasheet - production data
Features
ï· Complete interface between LNB and I²C
bus
ï· Built-in DC-DC converter for single 12 V
supply operation and high efficiency
(typ. 93% @ 0.5 A)
ï· Selectable output current limit by external
resistor
ï· Compliant with main satellite receiver output
voltage specifications (15 programmable
levels)
ï· Accurate built-in 22 kHz tone generator suits
widely accepted standards
ï· 22 kHz tone waveform integrity guaranteed
at no-load condition
ï· Low drop post regulator and high efficiency
step-up PWM with integrated power NMOS
allowing low power losses
ï· LPM function (low power mode) to reduce
dissipation
ï· Overload and overtemperature internal
protections with I²C diagnostic bits
ï· LNB short-circuit dynamic protection
ï· +/- 4 kV ESD tolerant on output power pins
Applications
ï· STB satellite receivers
ï· TV satellite receivers
ï· PC card satellite receivers
Description
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.
Table 1: Device summary
Order code
Package
Packing
LNBH25SPQR QFN24L (4x4) Tape and reel
March 2015
DocID026736 Rev 2
This is information on a product in full production.
1/37
www.st.com
|
▷ |