LNBP20_07 Datasheet, PDF (1/24 Pages) STMicroelectronics – LNBP supply and control voltage regulator (parallel interface)

LNBP20 / LNBP1X series
LNBP supply and control voltage regulator (parallel interface)
Feature summary
■ Complete interface for two LNBs remote supply
and control
■ LNB selection and stand-by function
■ Built-in tone oscillator factory trimmed at
22KHz
■ Fast oscillator start-up facilitates DiSEqC^TM
encoding
■ Two supply inputs for lowest dissipation
■ Bypass function for slave operation
■ LNB short circuit protection and diagnostic
■ Auxiliary modulation input extends flexibility
■ Cable length compensation
■ Internal over temperature protection
■ Backward current protection
Description
Intended for analog and digital satellite receivers,
the LNBP is a monolithic linear voltage regulator,
assembled in PowerSO-20 and PowerSO-10,
specifically designed to provide the powering
voltages and the interfacing signals to the LNB
downconverter situated in the antenna
PowerSO-20
10
1
PowerSO-10
via the coaxial cable. Since most satellite
receivers have two antenna ports, the output
voltage of the regulator is available at one of two
logic-selectable output pins (LNBA, LNBB). When
the IC is powered and put in Stand-by (EN pin
LOW), both regulator outputs are disabled to
allow the antenna downconverters to be
supplied/controlled by others satellite receivers
sharing the same coaxial lines. In this occurrence
the device will limit at 3 mA (max) the backward
current that could flow from LNBA and LNBB
output pins to GND. (See continuous description).
Order codes
Part number
May 2007
LNBP10
LNBP11
LNBP12
LNBP13
LNBP14
LNBP15
LNBP16
LNBP20
PowerSO-20
LNBP20PD-TR
Rev. 10
Package
PowerSO-10
LNBP10SP-TR
LNBP11SP-TR
LNBP12SP-TR
LNBP13SP-TR
LNBP14SP-TR
LNBP15SP-TR
LNBP16SP-TR
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