A8283SLB

更新时间： 2024-01-12 10:13:10

品牌	Logo	应用领域
急速微 - ALLEGRO		稳压器
页数	文件大小	规格书
8页	158K
描述
LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR

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A8283SLB 技术参数

生命周期：	Obsolete	零件包装代码：	SOIC
包装说明：	SOP, SOP24,.4	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.82
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	CURRENT-MODE
最大输入电压：	47 V	最小输入电压：	16 V
标称输入电压：	24 V	JESD-30 代码：	R-PDSO-G24
长度：	15.4 mm	功能数量：	1
端子数量：	24	最高工作温度：	85 °C
最低工作温度：	-20 °C	最大输出电流：	1 A
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装等效代码：	SOP24,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	认证状态：	Not Qualified
座面最大高度：	2.65 mm	子类别：	Switching Regulator or Controllers
表面贴装：	YES	切换器配置：	BUCK
最大切换频率：	384 kHz	温度等级：	OTHER
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	7.5 mm
Base Number Matches：	1

A8283SLB 数据手册

8283

PRELIMINARY INFORMATION

(Subject to change without notice)

November 21, 2000

LNB SUPPLY AND

CONTROL-VOLTAGE REGULATOR

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.

A8283SLB

OSEL

OLF

EXTM

VINT

VBULK

PUMPX

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.

MIOUT

VPUMP

CPUMP

GND

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.

GND

18 GND

SENSE

ENT

LNB

BUCK

VSEL0

REG.

VSEL1

LLC

VIN

TCAP

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.

Dwg. PP-072A

Note that the A8283SB (dual in-line package)

and A8283SLB (small-outline IC package) are

electrically identical and share a common

terminal number assignment.

FEATURES

Short-Circuit Protected Bypass Function for Slave Operation

LNB Selection and Stand-By Function

Built-In Tone Oscillator Factory Trimmed to 22 kHz, Facilitates

DiSEqC™ (a trademark of EUTELSAT) Encoding

Full Modulation With No Load

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,

Tracking Switch-Mode Power Converter for Lowest Dissipation

Externally Adjustable Short-Circuit Protection

LNB Short-Circuit Protection and Diagnostics

Auxiliary Modulation Input

Cable Length Compensation

Internal Over-Temperature Protection

T_A............................... -20°C to +85°C

Storage Temperature Range,

This device incorporates features that have patents pending.

T_S............................. -40°C to +150°C

Always order by complete part number, e.g., A8283SLB .

12 3 4 5 6 7 8

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与A8283SLB相关器件

型号	品牌	描述	获取价格	数据表
A8283SLBTR	ALLEGRO	Switching Regulator, Current-mode, 1A, 384kHz Switching Freq-Max, PDSO24, POWER, SOIC-24	获取价格
A8284(DIP)	ETC	Interface IC	获取价格
A8284(SOIC)	ETC	Interface IC	获取价格
A8284SB	ALLEGRO	TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR	获取价格
A8284SLB	ALLEGRO	TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR	获取价格
A8285	ALLEGRO	LNB Supply and Control Voltage Regulator	获取价格

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