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參數(shù)資料
| 型號： | LNBK20D2 |
| 英文描述： | LNB SUPPLY AND CONTROL VOLTAGE REGULATOR (PARALLEL INTERFACE) |
| 中文描述： | LNB電源與控制穩(wěn)壓器（并行接口） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 465K |
| 代理商： | LNBK20D2 |
1/14
July 2003
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COMPLETE INTERFACE FOR TWO LNBs
REMOTE SUPPLY AND CONTROL
GUARANTEED 400mA OUTPUT CURRENT
LNB SELECTION AND STAND-BY
FUNCTION
BUILT-IN TONE OSCILLATOR FACTORY
TRIMMED AT 22KHz
FAST OSCILLATOR START-UP FACILITATES
DiSEqC
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
COST-EFFECTIVE VERSION OF LNBP
SERIES
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DESCRIPTION
Intended for analog and digital satellite receivers,
the LNBK20D2 is a monolithic linear voltage
regulator,
assembled
designed to provide the powering voltages and the
interfacing signals to the LNB downconverter
situated in the antenna via the coaxial cable. It has
the same functionality of the LNBP1X and
LNBP20 series, at a reduced output current
capability. 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
downconverters
to
be
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.
For slave operation in single dish, dual receiver
systems, the bypass function is implemented by
an electronic switch between the Master Input pin
in
SO-20,
specifically
to
allow
the
antenna
supplied/controlled
by
(MI) and the LNBA pin, thus leaving all LNB
powering and control functions to the Master
Receiver. This electronic switch is closed when
the device is powered and EN pin is LOW.
The regulator outputs can be logic controlled to be
13 or 18 V (typ.) by mean of the VSEL pin for
remote controlling of LNBs. Additionally, it is
possible to increment by 1V (typ.) the selected
voltage value to compensate the excess voltage
drop along the coaxial cable (LLC pin HIGH).
In order to reduce the power dissipation of the
device when the lowest output voltage is selected,
the regulator has two Supply Input pins V
CC1
and
V
CC2
. They must be powered respectively at 16V
(min) and 23V (min), and an internal switch
automatically will select the suitable supply pin
according to the selected output voltage. If
adequate heatsink is provided and higher power
losses are acceptable, both supply pins can be
powered
by
the same
affecting any other circuit performance.
The ENT (Tone Enable) pin activates the internal
oscillator so that the DC output is modulated by a
±0.3 V, 22KHz (typ.) square wave. This internal
oscillator is factory trimmed within a tolerance of
±2KHz, thus no
further
external components are required.
A burst coding of the 22KHz tone can be
accomplished thanks to the fast response of the
ENT input and the prompt oscillator start-up. This
helps designers who want to implement the
DiSEqC
protocols (*).
In order to improve design flexibility and to allow
implementation of newcoming LNB remote control
standards, an analogic modulation input pin is
23V
source
without
adjustments
neither
LNBK20D2
LNB SUPPLY AND CONTROL VOLTAGE
REGULATOR (PARALLEL INTERFACE)
SO-20
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| LNBK20D2-TR | 功能描述:線性穩(wěn)壓器 - 標準 LNB SUPPLY AND CONTROL Vltg REG RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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| LNBK20PD-TR | 功能描述:線性穩(wěn)壓器 - 標準 VOLTAGE REGULATOR RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LNBP10 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL VOLTAGE REGULATOR PARALLEL INTERFACE |
| LNBP10LPUR | 功能描述:線性穩(wěn)壓器 - 標準 LNB SUP/CTRL VLT REG RoHS:否 制造商:STMicroelectronics 輸出類型: 極性: 輸出電壓:1.8 V 輸出電流:150 mA 負載調(diào)節(jié): 最大輸入電壓:5.5 V 線路調(diào)整率: 最大工作溫度:+ 125 C 安裝風格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
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