LNBP10 series
LNBP20
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
Multiwatt-15
DiSEqCTM
■
Fast oscillator start-up facilitates
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 Multiwatt-15, PowerSO-20 and
PowerSO-10, specifically designed to provide the
powering voltages and the interfacing signals to
the LNB downconverter situated in the antenna
10
1
PowerSO-20
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 code
Package
Part number
Multiwatt-15
PowerSO-20
PowerSO-10
LNBP10
LNBP10SP-TR (1)
LNBP11
LNBP11SP-TR (1)
LNBP12
LNBP12SP-TR (1)
LNBP13
LNBP13SP-TR (1)
LNBP14
LNBP14SP-TR (1)
LNBP15
LNBP15SP-TR (1)
LNBP16
LNBP16SP-TR (1)
LNBP20
LNBP20CR
LNBP20PD-TR
1. Available on request
September 2006
Rev. 9
1/25
www.st.com
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