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參數(shù)資料
| 型號(hào)： | LNBEH21PD-TR |
| 廠商： | 意法半導(dǎo)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(zhuǎn)換器及IC的接口 |
| 文件頁數(shù)： | 3/22頁 |
| 文件大?。?/td> | 588K |
| 代理商： | LNBEH21PD-TR |
LNBEH21
3/22
Table 4: Pin Description
PIN N°
SYMBOL
NAME
FUNCTION
18
V
CC
Supply Input
8V to 15V IC 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
DC/DC 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.
RX Output to the LNB in DiSEqC 2.0 application. See truth tables for
voltage selections and Communication Mode section for details.
Bidirectional data from/to I
2
C bus.
Clock from I
2
C bus.
Depending on the value set for OM bit this pin enable/disable the
internal 22KHz tone generator (OM=0) or switch the output voltage
from 13V to 18V and vice versa (OM=1)
22kHz Tone Detector Input. Must be AC coupled to the DiSEqC 2.0
bus.
Open drain output of the tone Detector to the main
μ
controller for
DiSEqC 2.0 data decoding. It is set LOW when a 22 KHz tone is
detected.
External Modulation Input acts on V
O
TX. Needs DC decoupling to the
AC source. If not used, can be left open.
Pins connected to Ground. Also internally connected to the die frame
(exposed pad) for heat dissipation.
Needed for internal preregulator filtering
Set high or floating for I
O
≤
750mA, connect to ground for I
O
≤
450mA.
Output of the linear post-regulator/modulator to the LNB. See truth
tables for voltage selections.
Four I
2
C bus addresses available by setting the Address Pin level
voltage. See address pin characteristics table.
17
16
GATE
SENSE
External Switch Gate
Current Sense Input
19
V
UP
Step-up Voltage
2
V
O
RX
Output Port during
22KHz Tone RX
Serial Data
12
SDA
13
SCL
Serial Clock
14
TEN/VSEL DiSEqC or 13/18V
TTL Logic Input
9
DETIN
Tone Detector Input
15
DSQOUT
DiSEqC Output
5
EXTM
External Modulator
1, 6, 10,
11, 20
8
3
GND
GROUND
BYP
ISEL
Bypass Capacitor
Current Limit Select
4
V
O
TX
Output Port during
22KHz Tone TX
Address Setting
7
ADDR
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| LNBEH221PD-R | 制造商:STMicroelectronics 功能描述:LNBEH221PD-R - Tape and Reel |
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| 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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
| LNBH21PD-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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-48 封裝:Reel |
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