LNBH21PD-TR Datasheet

IC型號：
LNBH21PD-TR
PDF描述：
LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INT...
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497.67KB
PDF頁數(shù)：
20頁
芯片廠家：
STMICROELECTRONICS

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LNBH21

LNB SUPPLY AND CONTROL IC WITH

STEP-UP CONVERTER AND I

C INTERFACE

COMPLETE INTERFACE BETWEEN LNB

AND I

BUS

BUILT-IN DC/DC CONTROLLER FOR

SINGLE 12V SUPPLY OPERATION AND

HIGH EFFICIENCY (Typ. 94% @ 750mA)

TWO SELECTABLE OUTPUT CURRENT

LIMIT (450mA / 750mA)

BOTH COMPLIANT WITH EUTELSAT AND

DIRECT OUTPUT VOLTAGE

SPECIFICATION

ACCURATE BUILT-IN 22KHz TONE

OSCILLATOR SUITS WIDELY ACCEPTED

STANDARDS

FAST OSCILLATOR START-UP FACILITATES

DiSEqC

ENCODING

BUILT-IN 22KHz TONE DETECTOR

SUPPORTS BI-DIRECTIONAL DiSEqC

2.0

SEMI-LOWDROP POST REGULATOR AND

HIGH EFFICIENCY STEP-UP PWM FOR

LOW POWER LOSS: Typ. 0.56W @ 125mA

TWO OUTPUT PINS SUITABLE TO BYPASS

THE OUTPUT R-L FILTER AND AVOID ANY

TONE DISTORSION (R-L FILTER AS PER

DiSEqC 2.0 SPECs, see application circuit on

pag. 5)

CABLE LENGTH DIGITAL COMPENSATION

OVERLOAD AND OVER-TEMPERATURE

INTERNAL PROTECTIONS

PowerSO-20

OVERLOAD AND OVER-TEMPERATURE I

DIAGNOSTIC BITs

LNB SHORT CIRCUIT SOA PROTECTION

WITH I

C DIAGNOSTIC BIT

+/- 4KV ESD TOLERANT ON INPUT/

OUTPUT POWER PINS

DESCRIPTION

Intended for analog and digital satellite STB

receivers/SatTV, sets/PC cards, the LNBH21 is a

monolithic voltage regulator and interface IC,

assembled in POWER SO-20, specifically

designed to provide the 13/18V power supply and

the 22KHz tone signalling to the LNB

downconverter in the antenna or to the multiswitch

box. In this application field, it offers a complete

solution with extremely low component count, low

power dissipation together with simple design and

standard interfacing.

BLOCK DIAGRAM

Gate

LNBH21

Step-up PWM

Controller

Vup-Feedback

Sense

VoTX

Vup

VoRX

Vcc

Byp

Preregul.+

U.V.lockout

+P.ON res.

Linear Post-reg

+Modulator

+Protections

ISEL

EXTM

SDA

SCL

V Select

I虜C interf. Enable

Diagnostics

ADDR

TEN

22KHz

Oscill.

Tone

Detector

DETIN

DSQOUT

DSQIN

April 2004

1/20

其它有關(guān)文件
LNBH21 View All Specifications
標準包裝
1
類別
集成電路 (IC)
家庭
PMIC - 穩(wěn)壓器 - 專用型
系列
-
應(yīng)用
轉(zhuǎn)換器，模擬和數(shù)字式衛(wèi)星信號 STB 接收器/SatTV
輸入電壓
8 V ~ 15 V
輸出數(shù)
1
輸出電壓
13.3V，18V
工作溫度
0°C ~ 85°C
安裝類型
表面貼裝
封裝/外殼
20-SOIC（0.433"，11.00mm 寬）裸露焊盤
供應(yīng)商設(shè)備封裝
PowerSO-20
包裝
Digi-Reel®
其它名稱
497-4270-6

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