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參數資料
| 型號： | LNBEH21PD |
| 廠商： | 意法半導體 |
| 英文描述： | LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND IC INTERFACE |
| 中文描述： | LNB電源與控制集成電路升壓轉換器及IC的接口 |
| 文件頁數： | 1/22頁 |
| 文件大?。?/td> | 588K |
| 代理商： | LNBEH21PD |
1/22
July 2004
I
COMPLETE INTERFACE BETWEEN LNB
AND I
2
C
TM
BUS
BUILT-IN DC/DC CONTROLLER FOR
SINGLE 12V SUPPLY OPERATION AND
HIGH EFFICIENCY (Typ. 94% @ 750mA)
TWO SELECTABLE OUTPUT CURRENT
LIMIT (450mA / 750mA)
ACCURATE BUILT-IN 22KHz TONE
OSCILLATOR SUITS WIDELY ACCEPTED
STANDARDS
FAST OSCILLATOR START-UP FACILITATES
DiSEqC
TM
ENCODING
BUILT-IN 22KHz TONE DETECTOR
SUPPORTS BI-DIRECTIONAL DiSEqC
TM
2.0
13/18V CONTROL WORD
COMMUNICATION
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)
CABLE LENGTH DIGITAL COMPENSATION
OVERLOAD AND OVER-TEMPERATURE
INTERNAL PROTECTIONS I
2
C WITH
DIAGNOSTIC BITs
I
I
I
I
I
I
I
I
I
I
I
LNB SHORT CIRCUIT SOA PROTECTION
WITH I
2
C DIAGNOSTIC BIT
+/- 4KV ESD TOLERANT ON INPUT/
OUTPUT POWER PINS
I
DESCRIPTION
Intended for analog and digital satellite STB
receivers/SatTV, sets/PC cards, the LNBEH21 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
downconverter in the antenna or to the multiswitch
box. The LNBEH21 supports both methods of
communication currently used, 13/18V Control
Word Communication Mode and DiSEqC
TM
communication. 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.
to
the
LNB
LNBEH21
LNB SUPPLY AND CONTROL IC WITH
STEP-UP CONVERTER AND I
2
C INTERFACE
TEN/VSEL
Enable
Preregul.+
U.V.lockout
+P.ON res.
V Select
Linear Post-reg
+Modulator
+Protections
Vup
VoRX
SDA
SCL
Vcc
Diagnostics
I2C interf.
Tone
Detector
DSQOUT
VoTX
DETIN
LNBEH21
Byp
Gate
Sense
EXTM
ADDR
Vup-Feedback
Step-up PWM
Controller
ISEL
Oscill
.
13/18V control
Tone control
OM=low
OM=High
Echo-pulses control
T
RISE
= T
FALL
= 500μs
22KHz
BLOCK DIAGRAM
PowerSO-20
Rev. 1
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| LP2950L-XX-T92-K | 100 mA LOW-DROPOUT VOLTAGE REGULATOR |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LNBEH21PD-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 |
| LNBEH221PD-R | 制造商:STMicroelectronics 功能描述:LNBEH221PD-R - Tape and Reel |
| LNBH2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBH21 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| LNBH21PD | 功能描述:其他電源管理 LNB Supply/Cont IC 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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