Datasheet > A8283SB

A8283SB

更新时间： 2024-02-29 20:15:35

品牌	Logo	应用领域
三垦 - SANKEN		开关光电二极管
页数	文件大小	规格书
8页	154K
描述
Switching Regulator, Current-mode, 1A, 384kHz Switching Freq-Max, PDIP22, POWER, BATWING, PLASTIC, DIP-24

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A8283SB 技术参数

生命周期：	Obsolete	零件包装代码：	DIP
包装说明：	DIP,	针数：	24
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.84
Is Samacsys：	N	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：	17.5 V	标称输入电压：	24 V
JESD-30 代码：	R-PDIP-T22	长度：	31.877 mm
功能数量：	1	端子数量：	22
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：	DIP	封装形状：	RECTANGULAR
封装形式：	IN-LINE	认证状态：	Not Qualified
座面最大高度：	5.334 mm	表面贴装：	NO
切换器配置：	BUCK	最大切换频率：	384 kHz
温度等级：	OTHER	端子形式：	THROUGH-HOLE
端子节距：	2.54 mm	端子位置：	DUAL
宽度：	7.62 mm	Base Number Matches：	1

A8283SB 数据手册

8283

LNB SUPPLY AND

CONTROL-VOLTAGE REGULATOR

FUNCTIONAL DESCRIPTION (cont’d)

This can be accomplished by connecting a 200 kΩ

resistor from the external modulation terminal (24) to

ground. This will reduce the LNB output voltage by

typically 300 mV without effecting the V_BULKvoltage.

The output voltage can be restored to the programmed

value by connecting a 1 MΩ resistor from the V_INT

terminal (23) to the T_CAPterminal (12). This raises both

V_BULKand V_Oby typically 300 mV.

Two terminals are dedicated to the over-current

protection/monitoring: SENSE and OLF. The LNB output

is current limited. The short-circuit protection threshold is

set by the value of an external resistor, R_S, between

terminals 3 and 8. R_S= V_OM(th)/I_OMwhere V_OM(th)is the

current-limiting threshold voltage and I_OMis the desired

current limit value. The minimum recommended value

for R_Sis 0.15 Ω.

The output linear regulator will sink and source

current. This feature allows full modulation capability

into capacitive loads as high as 0.25 µF.

In operation, the short-circuit protection produces

current fold-back at the input due to the tracking con-

verter. If the output is shorted, the linear regulator will

limit the output current to I_OM. The tracking converter

will maintain a constant voltage drop of 0.8 V across the

linear regulator. This condition results in typically

550 mW dissipation (I_OMx 0.8 V). Short-circuit or

thermal-shutdown activation will cause the OLF terminal,

an open-drain diagnostic output flag, to go LOW.

The programmed output voltage rise and fall times

can be set by an internal 25 kΩ resistor and an external

capacitor located on the TCAP terminal. Although any

value of capacitor is permitted, practical values are

typically 0.001 µF to 0.02 µF. This feature only affects

the turn on and programmed voltage rise and fall times.

Modulation is unaffected by the choice of TCAP. This

terminal can be left open if voltage rise and fall time

control is not required.

Thermal resistance:

DIP

SOIC —

—

_θJA= 40°C/W, R_θJT= 6°C/W, or

_θJA= 55°C/W, R_θJT= 6°C/W.

The device junction temperature should be kept below

150°C. Thermal shut-down circuitry turns off the device

if junction temperature exceeds +165°C typically.

The products described here are manufactured under one or more

U.S. patents or U.S. patents pending.

Allegro MicroSystems, Inc. reserves the right to make, from time to

time, such departures from the detail specifications as may be

required to permit improvements in the performance, reliability, or

manufacturability of its products. Before placing an order, the user is

cautioned to verify that the information being relied upon is current.

Allegro products are not authorized for use as critical components

in life-support devices or systems without express written approval.

The information included herein is believed to be accurate and

reliable. However, Allegro MicroSystems, Inc. assumes no responsi-

bility for its use; nor for any infringement of patents or other rights of

third parties which may result from its use.

www.allegromicro.com

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与A8283SB相关器件

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A8283SLB	ALLEGRO	LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR	获取价格
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

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