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LNBS21

LNB SUPPLY AND CONTROL IC WITH

STEP-UP CONVERTER AND I

2

C INTERFACE

s

s

s

s

s

s

s

s

s

s

COMPLETE INTERFACE BETWEEN LNB

AND I2CTM BUS

BUILT-IN DC/DC CONTROLLER FOR

SINGLE 12V SUPPLY OPERATION

ACCURATE BUILT-IN 22KHz TONE

OSCILLATOR

SUITS WIDELY ACCEPTED STANDARDS

FAST OSCILLATOR START-UP FACILITATES

DiSEqCTM ENCODING

BUILT-IN 22KHz TONE DETECTOR

SUPPORTS BI-DIRECTIONAL DiSEqCTM

LOOP-THROUGH FUNCTION FOR SLAVE

OPERATION

LNB SHORT CIRCUIT PROTECTION AND

DIAGNOSTIC

CABLE LENGTH DIGITAL COMPENSATION

INTERNAL OVER TEMPERATURE

PROTECTION

PowerSO-20

DESCRIPTION

Intended for analog and digital satellite STB

receivers/SatTV, sets/PC cards, the LNBS21 is a

monolithic voltage regulator and interface IC,

SCHEMATIC DIAGRAM

Gate

Sense

Step-up

Controller

assembled in PowerSO-20, specifically designed

to provide the power and the 13/18V, 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 I

2

C

TM

standard interfacing.

This IC has a built in DC/DC step-up controller

that, from a single supply source ranging from 8 to

15V, generates the voltages that let the linear

LNBS21

LT1

Feedback

LT2

Vup

Vcc

Byp

OUT

Preregul.+

U.V.lockout

+P.ON res.

Enable

I Select

V Select

Linear Post-reg

+Modulator

+Protections

EXTM

SDA

SCL

ADDR

DSQIN

I虜C

interf.

22KHz

Oscill.

Diagnostics

DETIN

Tone

Detector

DSQOUT

November 2002

1/19

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LNBS21PD-TR相關(guān)型號PDF文件下載

• 型號
  版本
  描述
  廠商
  下載
• LNBS21
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INT...
  
  LNBS21
• LNBS21
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND ...
  STMICROELECTRON...
  LNBS21
• LNBS21PD
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INT...
  
  LNBS21PD
• LNBS21PD
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND ...
  STMICROELECTRON...
  LNBS21PD
• LNBS21_04
  英文版
  STMicroelectronics [LNB SUPPLY AND CONTROL IC WITH STEP-UP ...
  
  LNBS21_04
• LNBS21PD-T...
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INT...
  
  LNBS21PD-TR
• LNBS21PD-T...
  英文版
  Power Supplies, Converters, Controllers Interface PowerSO-20
  LNBS21PD-TR
• LNBS21PD-T...
  英文版
  LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND ...
  STMICROELECTRON...
  LNBS21PD-TR

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