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参数资料
| 型号： | LNBK20D2 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO20 |
| 封装： | SO-20 |
| 文件页数： | 1/14页 |
| 文件大小： | 467K |
| 代理商： | LNBK20D2 |
1/14
July 2003
s
COMPLETE INTERFACE FOR TWO LNBs
REMOTE SUPPLY AND CONTROL
s
GUARANTEED 400mA OUTPUT CURRENT
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
s
COST-EFFECTIVE VERSION OF LNBP
SERIES
DESCRIPTION
Intended for analog and digital satellite receivers,
the LNBK20D2 is a monolithic linear voltage
regulator,
assembled
in
SO-20,
specifically
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
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
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
LNBK20D2
LNB SUPPLY AND CONTROL VOLTAGE
REGULATOR (PARALLEL INTERFACE)
SO-20
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LNBK20D2-TR | 功能描述:线性稳压器 - 标准 LNB SUPPLY AND CONTROL Vltg REG RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| LNBK20PD | 功能描述:IC LNB SUPPLY & CNTRL 20-PWRSOIC RoHS:是 类别:集成电路 (IC) >> 接口 - 专用 系列:- 标准包装:3,000 系列:- 应用:PDA，便携式音频/视频，智能电话 接口:I²C，2 线串口 电源电压:1.65 V ~ 3.6 V 封装/外壳:24-WQFN 裸露焊盘 供应商设备封装:24-QFN 裸露焊盘（4x4） 包装:带卷 (TR) 安装类型:表面贴装 产品目录页面:1015 (CN2011-ZH PDF) 其它名称:296-25223-2 |
| LNBK20PD-TR | 功能描述:线性稳压器 - 标准 VOLTAGE REGULATOR RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
| LNBP10 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL VOLTAGE REGULATOR PARALLEL INTERFACE |
| LNBP10LPUR | 功能描述:线性稳压器 - 标准 LNB SUP/CTRL VLT REG RoHS:否 制造商:STMicroelectronics 输出类型: 极性: 输出电压:1.8 V 输出电流:150 mA 负载调节: 最大输入电压:5.5 V 线路调整率: 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:SOT-323-5L |
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