Datasheet > LNBH2

LNBH2

更新时间： 2024-11-23 22:29:11

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		转换器升压转换器
页数	文件大小	规格书
20页	497K
描述
LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE

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中文翻译

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LNBH2 数据手册

LNBH21

LNB SUPPLY AND CONTROL IC WITH

STEP-UP CONVERTER AND I C INTERFACE

■

COMPLETE INTERFACE BETWEEN LNB

AND I C 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

■

PowerSO-20

■

OVERLOAD AND OVER-TEMPERATURE I C

DIAGNOSTIC BITs

■

ACCURATE BUILT-IN 22KHz TONE

OSCILLATOR SUITS WIDELY ACCEPTED

STANDARDS

LNB SHORT CIRCUIT SOA PROTECTION

WITH I C DIAGNOSTIC BIT

+/- 4KV ESD TOLERANT ON INPUT/

OUTPUT POWER PINS

■

FAST OSCILLATOR START-UP FACILITATES

DiSEqC ENCODING

BUILT-IN 22KHz TONE DETECTOR

SUPPORTS BI-DIRECTIONAL DiSEqC 2.0

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

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

I C standard interfacing.

BLOCK DIAGRAM

LNBH21

Gate

Step-up PWM

Controller

Vup-Feedback

Sense

VoTX

VoRX

Vup

Vcc

Preregul.+

U.V.lockout

+P.ON res.

Byp

Linear Post-reg

+Modulator

ISEL

+Protections

EXTM

V Select

SDA

SCL

Diagnostics

Enable

I²C interf.

Tone

Detector

ADDR

DETIN

TEN

22KHz

Oscill.

DSQOUT

DSQIN

April 2004

1/20

12 3 4 5 6 7...20

中文翻译

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与LNBH2相关器件

型号	品牌	获取价格	描述	数据表
LNBH21	STMICROELECTRONICS	获取价格	LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH21PD	STMICROELECTRONICS	获取价格	LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH21PD-TR	STMICROELECTRONICS	获取价格	LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH221	STMICROELECTRONICS	获取价格	DUAL LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE
LNBH221_06	STMICROELECTRONICS	获取价格	Dual LNB supply and control IC with Step-Up converter and I2C interface
LNBH221PD	STMICROELECTRONICS	获取价格	0.75A DUAL SWITCHING CONTROLLER, PDSO36, POWER, SO-36
LNBH221PD-TR	STMICROELECTRONICS	获取价格	0.75A DUAL SWITCHING CONTROLLER, PDSO36, POWER, SO-36
LNBH23	STMICROELECTRONICS	获取价格	LNBs supply and control IC with step-up and I
LNBH23L	STMICROELECTRONICS	获取价格	LNB供电和控制IC，带升压和I2C接口
LNBH23LQTR	STMICROELECTRONICS	获取价格	LNB supply and control IC with step-up and I2C interface

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