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參數(shù)資料
| 型號： | LNBS21PD |
| 廠商： | 意法半導體 |
| 英文描述： | LNB SUPPLY AND CONTROL IC WITH STEP-UP CONVERTER AND I2C INTERFACE |
| 中文描述： | LNB電源與控制集成電路升壓轉換器和I2C接口 |
| 文件頁數(shù)： | 4/19頁 |
| 文件大?。?/td> | 637K |
| 代理商： | LNBS21PD |
LNBS21
4/19
TABLE A: PIN CONFIGURATIONS
SYMBOL
NAME
FUNCTION
PIN NUMBER
vs PACKAGE
V
CC
Supply Input
8V to 15V supply. A 220μF bypass capacitor to
GND with a 470nF (ceramic) in parallel is
recommended
External MOS switch Gate connection of the
step-up converter
Current Sense comparator input. Connected to
current sensing resistor
Input of the linear post-regulator. The voltage on this
pin is monitored by internal step-ut controller to
keep a minimum dropout across the linear pass
transistor
Output of the linear post regulator modulator to the
LNB. See truth table for voltage selections.
Bidirectional data from/to I
2
C bus.
Clock from I
2
C bus.
When the TEN bit of the System Register is LOW,
this pin will accept the DiSEqC code from the main
μ
controller. The LNBS21 will use this code to
modulate the internally generated 22kHz carrier. Set
to GND thi pin if not used.
22kHz Tone Detector Input. Must be AC coupled to
the DiSEcQ bus.
Open collector output of the tone Detector to the
main
μ
controller for DiSEcQ data decoding. It is
LOW when tone is detected.
External Modulation Input. Need DC decoupling to
the AC source. If not used, can be left open.
Circuit Ground. It is internally connected to the die
frame for heat dissipation.
Needed for internal preregulator filtering
In standby mode the power switch between LT1
and LT2 is closed. Max allowed current is 900mA.
this pin can be left open if loopthrough function is
not needed.
Same as above
Four I
2
C bus addresses available by setting the
Address Pin level voltage
18
GATE
Exrernal Switch Gate
17
SENSE
Current Sense Input
16
V
up
Step-up Voltage
19
OUT
Output Port
2
SDA
Serial Data
12
SCL
Serial Clock
13
DSQIN
DiSEqC Input
14
DETIN
Detector In
9
DSQOUT DiSEqC Output
15
EXTM
Extrernal Modulator
5
GND
Ground
1, 10, 11, 20
BYP
LT1
Bypass Capacitor
Loop Through Switch
8
4
LT2
ADDR
Loop Through Switch
Address Setting
3
7
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LNBS21PD-TR | 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 |
| LNBTVS3-220 | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 3kV 1500W Ppp Lightning Protection RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
| LNBTVS3-220S | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Lightning protection for LNB power supply |
| LNBTVS3-220U | 功能描述:TVS 二極管 - 瞬態(tài)電壓抑制器 3kV 1500W Ppp Lightning Protection RoHS:否 制造商:Vishay Semiconductors 極性:Bidirectional 工作電壓: 擊穿電壓:58.9 V 鉗位電壓:77.4 V 峰值浪涌電流:38.8 A 系列: 封裝 / 箱體:DO-214AB 最小工作溫度:- 55 C 最大工作溫度:+ 150 C |
| LNBTVS3-221 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Lightning protection for LNB power supply |
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