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參數資料
| 型號： | LNBP20PD |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 模擬信號調理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封裝： | POWER, SO-20 |
| 文件頁數： | 1/18頁 |
| 文件大小： | 204K |
| 代理商： | LNBP20PD |
LNBP10 SERIES
LNBP20
LNB SUPPLY AND CONTROL VOLTAGE
REGULATOR (PARALLEL INTERFACE)
September 1998
s
COMPLETE INTERFACE FOR TWO LNBs
REMOTE SUPPLY AND CONTROL
s
LNB SELECTION AND STAND-BY FUNCTION
s
BUILT-IN TONE OSCILLATOR FACTORY
TRIMMED AT 22KHz
s
FAST OSCILLATOR START-UP
FACILITATES DiSEqC
ENCODING
s
TWO SUPPLY INPUTS FOR LOWEST
DISSIPATION
s
BYPASS FUNCTION FOR SLAVE
OPERATION
s
LNB SHORT CIRCUIT PROTECTION AND
DIAGNOSTIC
s
AUXILIARY MODULATION INPUT EXTENDS
FLEXIBILITY
s
CABLE LENGTH COMPENSATION
s
INTERNAL OVER TEMPERATURE
PROTECTION
s
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 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.
For slave operation in single dish, dual receiver
systems, the bypass function is implemented by
an electronic switch 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.
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
VCC1
and
VCC2.
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 23V
source
without
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 adjustments neither
external components are required.
A burst coding of the 22KHz tone can be
Multiwatt-15
1
10
PowerSo-20
PowerSO-10
1/18
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LNBP20PD-TR | 功能描述:線性穩壓器 - 標準 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 負載調節: 最大輸入電壓:5.5 V 線路調整率: 最大工作溫度:+ 125 C 安裝風格: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 |
| LNBP21D2-TR | 功能描述:其他電源管理 LNB Supply/Control RoHS:否 制造商:Texas Instruments 輸出電壓范圍: 輸出電流:4 mA 輸入電壓范圍:3 V to 3.6 V 輸入電流: 功率耗散: 工作溫度范圍:- 40 C to + 110 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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