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參數(shù)資料
| 型號(hào)： | LNBP20CR |
| 廠商： | 意法半導(dǎo)體 |
| 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(yè)數(shù)： | 1/18頁(yè) |
| 文件大小： | 204K |
| 代理商： | LNBP20CR |
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LNBP10 SERIES
LNBP20
LNB SUPPLY AND CONTROL VOLTAGE
REGULATOR (PARALLEL INTERFACE)
September 1998
I
COMPLETEINTERFACE FOR TWO LNBs
REMOTE SUPPLYAND CONTROL
I
LNB SELECTIONAND STAND-BY FUNCTION
I
BUILT-INTONE OSCILLATOR FACTORY
TRIMMED AT 22KHz
I
FAST OSCILLATORSTART-UP
FACILITATESDiSEqC
ENCODING
I
TWOSUPPLY INPUTS FOR LOWEST
DISSIPATION
I
BYPASSFUNCTION FOR SLAVE
OPERATION
I
LNB SHORT CIRCUIT PROTECTION AND
DIAGNOSTIC
I
AUXILIARYMODULATION INPUT EXTENDS
FLEXIBILITY
I
CABLELENGTH COMPENSATION
I
INTERNAL OVER TEMPERATURE
PROTECTION
I
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
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 outputpins (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
supplied/controlled by others satellite receivers
sharing the samecoaxial 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 electronicswitch between the Master Input pin
(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.
to
be
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
selected, the regulator has two Supply Input pins
V
CC1
and
V
CC2
.
They
respectively at 16V (min) and 23V (min), and an
internal switch
automatically will
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 23V
source
without
affecting
performance.
The ENT (Tone Enable) pin activates the internal
oscillator so that the DC output is modulatedby a
±
0.3 V, 22KHz (typ.) square wave. This internal
oscillator is factory trimmed within a tolerance of
±
2KHz, thus no further adjustments neither
externalcomponents are required.
A burst coding of the 22KHz tone can be
voltage
is
must
be
powered
select the
any
other
circuit
Multiwatt-15
1
10
PowerSo-20
PowerSO-10
1/18
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LNBP20PD | LNB SUPPLY AND CONTROL VOLTAGE REGULATOR PARALLEL INTERFACE |
| LNBP20 | LNB Supply and Control Voltage Regulator (Parallel Interface)(線性電壓穩(wěn)壓器) |
| LNBP21PD-TR | SIGN, NO SMOKING, 75X50MM, PK10, SAV; RoHS Compliant: NA |
| LNBP21 | LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBP21D2 | LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LNBP20PD | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) LNBP Supply/Control 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(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LNBP20PD-TR | 功能描述:線性穩(wěn)壓器 - 標(biāo)準(zhǔn) LNBP Supply/Control 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(fù)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(fēng)格:SMD/SMT 封裝 / 箱體:SOT-323-5L |
| LNBP21 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBP21_04 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBP21D2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNBP SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
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