LNBH26PQR Datasheet, PDF (1/38 Pages) STMicroelectronics – Dual LNBS supply and control IC with step-up and I²C interface

LNBH26
Dual LNBS supply and control IC with step-up and I²C interface
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
protection with I²C diagnostic bits
■ LNB short-circuit dynamic protection
■ +/- 4 kV ESD tolerant on output power pins
Applications
■ STB satellite receivers
■ TV satellite receivers
■ PC card satellite receivers
QFN24 (4 x 4 mm)
Description
Intended for analog and digital dual satellite
receivers/Sat-TV, and Sat-PC cards, the LNBH26
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 dishes or to the multi-switch box. In this
application field, it offers a complete solution for
dual tuner satellite receivers with extremely low
component count, low power dissipation together
with simple design and I²C standard interfacing.
Table 1.
Device summary
Order code
LNBH26PQR
February 2012
Package
QFN24 (4 x 4)
Doc ID 022771 Rev 1
Packaging
Tape and reel
1/38
www.st.com
38