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參數(shù)資料
| 型號(hào)： | LNBH221 |
| 廠商： | 意法半導(dǎo)體 |
| 英文描述： | DUAL LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| 中文描述： | 雙LNB電源與控制集成電路升壓轉(zhuǎn)換器和I2C接口 |
| 文件頁數(shù)： | 9/18頁 |
| 文件大小： | 515K |
| 代理商： | LNBH221 |
LNBH221
9/18
DiSEqC
TM
IMPLEMENTATION
The LNBH221 helps the system designer to implement the bi-directional DiSEqC 2.0 protocol by allowing
an easy PWK modulation/demodulation of the 22KHz carrier. The PWK data are exchanged between the
LNBH221 and the main μP using logic levels that are compatible with both 3.3 and 5V microcontrollers.
This data exchange is made through two dedicated pins, DSQIN and DSQOUT, in order to maintain the
timing relationships between the PWK data and the PWK modulation as accurate as possible. These two
pins should be directly connected to two I/O pins of the μP, thus leaving to the resident firmware the task
of encoding and decoding the PWK data in accordance to the DiSEqC protocol. Full compliance of the
system to the specification is thus not implied by the bare use of the LNBH221. The system designer
should also take in consideration the bus hardware requirements; that can be simply accomplished by the
R-L termination connected on the V
OUT
pins of the LNBH221, as shown in the Typical Application Circuit
on page 4. To avoid any losses due to the R-L impedance during the tone transmission, the LNBH221 has
dedicated output (V
O
TX) that, in a DiSEqC 2.0 application, is connected after the filter and must be
enabled by setting the TTX SR bit HIGH only during the tone transmission (see DiSEqC 2.O operation
description on page 5).
Unidirectional (1.x) DiSEqC and non-DiSEqC systems normally don't need this termination, and the V
O
TX
pin can be directly connected to the LNB supply port of the Tuner (see DiSeqC 1.x application circuit on
pag.4). There is also no need of Tone Decoding, thus DETIN and DSQOUT pins can be left unconnected
and the Tone is provided by the V
O
TX.
ELECTRICAL CHARACTERISTICS OF EACH SECTION (A and B)
T
J
= 0 to 85°C, EN=1, TTX=0/1, LLC=VSEL=TEN=PCL=0, DSQIN=LOW, V
IN
=12V, I
OUT
=50mA, unless
otherwise specified. See software description section for I
2
C access to the system register)
Symbol
Parameter
Test Conditions
Min.
Typ.
Max.
Unit
V
IN
I
IN
Supply Voltage
Supply Current
I
OUT
= 500 mA TEN=VSEL=LLC=1
EN=TEN=VSEL=LLC=1, No Load
EN=0
I
OUT
= 500 mA VSEL=1
8
15
40
7
18.7
20.3
13.75
14.75
40
60
200
750
V
20
3.5
18
19.5
13.25
14.25
5
5
mA
V
OUT
Output Voltage
LLC=0
LLC=1
LLC=0
LLC=1
VSEL=0
VSEL=1
17.3
18.7
12.75
13.75
V
V
OUT
Output Voltage
I
O
= 500 mA VSEL=0
V
V
OUT
Line Regulation
V
IN
=8 to 15V
mV
V
OUT
I
MAX
I
SC
Load Regulation
Output Current Limiting
Output Short Circuit Current VSEL = 0
VSEL = 0 or 1 I
OUT
= 50 to 500mA
mV
mA
mA
500
300
200
900
VSEL = 1
PCL=0
t
OFF
Dynamic Overload
protection OFF Time
Dynamic Overload
protection ON Time
Tone Frequency
Tone Amplitude
Tone Duty Cycle
Tone Rise and Fall Time
External Modulation Gain
External Modulation Input
Voltage
External Modulation
Impedance
DC/DC Converter Switch
Frequency
Output Shorted
ms
t
ON
PCL=0
Output Shorted
t
OFF
/10
ms
f
TONE
A
TONE
D
TONE
t
r
, t
f
G
EXTM
V
EXTM
TEN=1
TEN=1
TEN=1
TEN=1
V
OUT
/
V
EXTM
, f = 10Hz to 50KHz, TTX=1
AC Coupling, TTX=1
20
0.55
40
5
22
0.72
50
8
6
24
0.9
60
15
KHz
Vpp
%
μ
s
400
mVpp
Z
EXTM
f = 10Hz to 50KHz
260
f
SW
220
kHz
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相關(guān)代理商/技術(shù)參數(shù) |
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| LNBH221/1TM | 制造商:STMicroelectronics 功能描述:LNB SUPPLY/CONTROL REGULATOR, 36 Pin, Plastic, SSOP |
| LNBH221/1TM-TR | 制造商:STMicroelectronics 功能描述:LNB SUPPLY/CONTROL REGULATOR, 36 Pin, Plastic, SSOP |
| LNBH221_06 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Dual LNB supply and control IC with Step-Up converter and I2C interface |
| LNBH221PD | 功能描述:IC LNB SUPP&CTRL DUAL 36-PWRSOIC RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - 專用型 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:2,000 系列:- 應(yīng)用:電源，ICERA E400，E450 輸入電壓:4.1 V ~ 5.5 V 輸出數(shù):10 輸出電壓:可編程 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:42-WFBGA，WLCSP 供應(yīng)商設(shè)備封裝:42-WLP 包裝:帶卷 (TR) |
| LNBH221PD-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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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