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參數(shù)資料
| 型號(hào)： | A8283 |
| 廠商： | Allegro MicroSystems, Inc. |
| 英文描述： | Low-Noise Block Supply and Control-Voltage Regulator(低噪聲組件,電源和控制電壓穩(wěn)壓器) |
| 中文描述： | 低噪聲塊供應(yīng)和控制穩(wěn)壓器（低噪聲組件，電源和控制電壓穩(wěn)壓器） |
| 文件頁(yè)數(shù)： | 1/8頁(yè) |
| 文件大?。?/td> | 155K |
| 代理商： | A8283 |
D
2
8283
LNB SUPPLY AND
CONTROL-VOLTAGE REGULATOR
Always order by complete part number, e.g.,
A8283SLB
.
Intended for analog and digital satellite receivers, the low-noise block
converter regulator (LNBR) is a monolithic linear and switching voltage
regulator designed to provide power and interface signals to the LNB down
converter via the coaxial cable. If the device is in stand-by mode (EN terminal
LOW), the regulator output is disabled, allowing the antenna downconverters to
be supplied or controlled by other satellite receivers sharing the same coaxial
cable. Similar two-output LNB supply and control voltage regulators are the
A8284SB/SLB.
For slave operation in single-dish dual-receiver systems, the bypass
function is implemented by an electronic switch between the master input
terminal (MI) and the LNB terminal, leaving all LNB power and control
functions to the master receiver. This electronic switch is closed if the device
is powered, EN is HIGH, and OSEL is LOW.
The regulator outputs are set to 12, 13, 18, or 20 V by the VSEL terminals.
Additionally, it is possible to increase the selected voltage by 1 V to compen-
sate for the voltage drop in the coaxial cable (LLC terminal HIGH). The
LNBR combines a tracking switching regulator and low-noise linear regulator.
Logic inputs (VSEL0, VSEL1, and LLC) select the desired output voltage. A
tracking current-mode buck converter provides the linear regulator with an
input voltage that is set to the output voltage plus typically 0.8 V. This main-
tains constant voltage drop across the linear regulator while permitting ad-
equate voltage range for tone injection.
The device is supplied in a 24-pin plastic DIP with batwing tabs
(A8283SB), or a 24-lead SOIC power-tab package (A8283SLB). In both cases,
the power tab is at ground potential and needs no electrical isolation.
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
IN
..........................
47 V
Output Current, I
O
....
Internally Limited
Logic Input Voltage Range,
V
I
...................................
-0.5 V to +7 V
Bypass Switch Current,
I
SW
........................
Internally Limited
Flag Output Voltage, V
OLF
..................
7 V
Operating Temperature Range,
T
A
...............................
-20
°
C to +85
°
C
Storage Temperature Range,
T
S
.............................
-40
°
C to +150
°
C
FEATURES
Short-Circuit Protected Bypass Function for Slave Operation
I
LNB Selection and Stand-By Function
I
Built-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates
DiSEqC (a trademark of EUTELSAT) Encoding
I
Full Modulation With No Load
I
Tracking Switch-Mode Power Converter for Lowest Dissipation
I
Externally Adjustable Short-Circuit Protection
I
LNB Short-Circuit Protection and Diagnostics
I
Auxiliary Modulation Input
I
Cable Length Compensation
I
Internal Over-Temperature Protection
I
This device incorporates features that have patents pending.
PRELIMINARY INFORMATION
(Subject to change without notice)
February 5, 2001
23
17
8
1
2
3
4
5
6
7
9
9
12
16
14
13
24
22
21
20
19
18
11
10
EXTM
VINT
PUMPX
VPUMP
CPUMP
GND
GND
ENT
EN
VSEL0
VSEL1
LLC
OSEL
OLF
VBULK
MIOUT
MI
GND
GND
SENSE
LNB
LX
VIN
TCAP
C
P
V
C
REG.
BUCK
Dwg. PP-072A
15
Note that the A8283SB (dual in-line package)
and A8283SLB (small-outline IC package) are
electrically identical and share a common
terminal number assignment.
A8283SLB
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| A8284 | Two Output Low-Noise Block Supply and Control-Voltage Regulator(雙輸出低噪聲組件,電源和控制電壓穩(wěn)壓器) |
| A8285 | LNB Supply and Control Voltage Regulator |
| A8287SLB | LNB Supply and Control Voltage Regulator |
| A8287 | LNB Supply and Control Voltage Regulator |
| A8285SLB | LNB Supply and Control Voltage Regulator |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| A8283(DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Interface IC |
| A8283(SOIC) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Interface IC |
| A8283SB | 制造商:ALLEGRO 制造商全稱(chēng):Allegro MicroSystems 功能描述:LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR |
| A8283SLB | 制造商:ALLEGRO 制造商全稱(chēng):Allegro MicroSystems 功能描述:LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR |
| A8284(DIP) | 制造商:未知廠家 制造商全稱(chēng):未知廠家 功能描述:Interface IC |
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