UC3842B

批量生产

电流模式PWM

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概述
Online design
样片和购买
解决方案
文件
CAD资源
工具与软件
质量与可靠性
Partner products
Sales Briefcase

产品概述

描述

The UC284xB family of control ICs provides the necessary features to implement off-line or DC to DC fixed frequency current mode control schemes with a minimal external parts count. Internally implemented circuits include a trimmed oscillator for precise DUTY CYCLE CONTROL under voltage lockout featuring start-up current less than 0.5mA, a precision reference trimmed for accuracy at the error amp input, logic to insure latched operation, a PWM comparator which also provides current limit control, and a totem pole output stage designed to source or sink high peak current. The output stage, suitable for driving N-Channel MOSFETs, is low in the off-state. Differences between members of this family are the under-voltage lockout thresholds and maximum duty cycle ranges. The UC2842B and UC2844B have UVLO thresholds of 16V (on) and 10V (off), ideally suited off-line applications The corresponding thresholds for the UC2843B and UC2845B are 8.5V and 7.9V. The UC2842B and UC2843B can operate to duty cycles approaching 100%. A range of the zero to < 50 % is obtained by the UC2844B and UC2845B by the addition of an internal toggle flip flop which blanks the output off every other clock cycle.
  • 所有功能

    • LOW START-UP AND OPERATING CURRENT
    • UNDERVOLTAGE LOCKOUT WITH HYSTERESIS
    • INTERNALLY TRIMMED REFERENCE WITH UNDERVOLTAGE LOCKOUT
    • CURRENT LIMITING
    • TRIMMED OSCILLATOR FOR PRECISE FREQUENCY CONTROL
    • CURRENT MODE OPERATION TO 500kHz
    • OSCILLATOR FREQUENCY GUARANTEED AT 250kHz
    • LATCHING PWM FOR CYCLE-BY-CYCLE
    • HIGH CURRENT TOTEM POLE OUTPUT
    • AUTOMATIC FEED FORWARD COMPENSATION

电路原理图

EDA符号、封装和3D模型

STMicroelectronics - UC3842B

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Symbols

符号

Footprints

封装

3D model

3D模型

质量与可靠性

产品型号 Marketing Status 封装 等级规格 符合RoHS级别 材料声明**
UC3842BD1
批量生产
SO-8 工业 Ecopack2
UC3842BD1013TR
批量生产
SO-8 工业 Ecopack2
UC3842BN
批量生产
DIP-8 工业 Ecopack2

UC3842BD1

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

UC3842BD1013TR

Package:

SO-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

SO-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

UC3842BN

Package:

DIP-8

Material Declaration**:

PDF XML

Marketing Status

批量生产

Package

DIP-8

Grade

Industrial

RoHS Compliance Grade

Ecopack2

(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此,它们可能不是100%适用于特定的设备。有关特定设备的信息,请联系 销售支持

样片和购买

产品型号
从分销商订购
从ST订购
供货状态
ECCN (US)
ECCN (EU)
包装类型
封装
温度(ºC) Country of Origin
Budgetary Price (US$)*/Qty
最小值
最大值
UC3842BD1013TR Available at 5 distributors

经销商的可用性UC3842BD1013TR

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 416 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2500 1 Buy from Distributor
COMPEL EUROPE 11910 1 Buy from Distributor
MOUSER WORLDWIDE 262 1 Buy from Distributor
Farnell Element14 EUROPE 3422 1 Buy from Distributor

代理商库存报告日期: 2021-11-27

代理商名称

DIGIKEY

库存

416

Min.Order

1

地区

WORLDWIDE Buy from Distributor

YOSUN

库存

2500

Min.Order

1

地区

ASIA/PACIFIC Buy from Distributor

COMPEL

库存

11910

Min.Order

1

MOUSER

库存

262

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

3422

Min.Order

1

代理商库存报告日期: 2021-11-27

Buy Direct
批量生产
EAR99 NEC Tape And Reel SO-8 - - MOROCCO 0.3353 / 1k
UC3842BD1 Available at 4 distributors

经销商的可用性UC3842BD1

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 3087 1 Buy from Distributor
Newark Element14 AMERICA 50 0 Buy from Distributor
MOUSER WORLDWIDE 1060 1 Buy from Distributor
Farnell Element14 EUROPE 1444 1 Buy from Distributor

代理商库存报告日期: 2021-11-26

代理商名称

DIGIKEY

库存

3087

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Newark Element14

库存

50

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1060

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

1444

Min.Order

1

代理商库存报告日期: 2021-11-26

Buy Direct
批量生产
EAR99 NEC Tube SO-8 - - MOROCCO 0.3353 / 1k
UC3842BN Available at 7 distributors

经销商的可用性UC3842BN

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 7127 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2000 1 Buy from Distributor
COMPEL EUROPE 16382 1 Buy from Distributor
RS COMPONENTS EUROPE 1930 10 Buy from Distributor
Newark Element14 AMERICA 6 0 Buy from Distributor
MOUSER WORLDWIDE 2281 1 Buy from Distributor
Farnell Element14 EUROPE 3304 1 Buy from Distributor

代理商库存报告日期: 2021-11-27

代理商名称

DIGIKEY

库存

7127

Min.Order

1

地区

WORLDWIDE Buy from Distributor

YOSUN

库存

2000

Min.Order

1

地区

ASIA/PACIFIC Buy from Distributor

COMPEL

库存

16382

Min.Order

1

RS COMPONENTS

库存

1930

Min.Order

10

Newark Element14

库存

6

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

2281

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

3304

Min.Order

1

代理商库存报告日期: 2021-11-27

Buy Direct
批量生产
EAR99 NEC Tube DIP-8 - - CHINA 0.3353 / 1k

UC3842BD1013TR

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

经销商的可用性UC3842BD1013TR

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 416 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2500 1 Buy from Distributor
COMPEL EUROPE 11910 1 Buy from Distributor
MOUSER WORLDWIDE 262 1 Buy from Distributor
Farnell Element14 EUROPE 3422 1 Buy from Distributor

代理商库存报告日期: 2021-11-27

代理商名称

DIGIKEY

库存

416

Min.Order

1

地区

WORLDWIDE Buy from Distributor

YOSUN

库存

2500

Min.Order

1

地区

ASIA/PACIFIC Buy from Distributor

COMPEL

库存

11910

Min.Order

1

MOUSER

库存

262

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

3422

Min.Order

1

代理商库存报告日期: 2021-11-27

ECCN (EU)

NEC

包装类型

Tape And Reel

封装

SO-8

Operating Temperature (°C)

(最小值)

-

(最大值)

-

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

MOROCCO

UC3842BD1

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

经销商的可用性UC3842BD1

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 3087 1 Buy from Distributor
Newark Element14 AMERICA 50 0 Buy from Distributor
MOUSER WORLDWIDE 1060 1 Buy from Distributor
Farnell Element14 EUROPE 1444 1 Buy from Distributor

代理商库存报告日期: 2021-11-26

代理商名称

DIGIKEY

库存

3087

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Newark Element14

库存

50

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

1060

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

1444

Min.Order

1

代理商库存报告日期: 2021-11-26

ECCN (EU)

NEC

包装类型

Tube

封装

SO-8

Operating Temperature (°C)

(最小值)

-

(最大值)

-

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

MOROCCO

UC3842BN

供货状态

批量生产

ECCN (US)

EAR99

Budgetary Price (US$)*/Qty

0.3353 / 1k

经销商的可用性UC3842BN

代理商名称
地区 库存 最小订购量 第三方链接
DIGIKEY WORLDWIDE 7127 1 Buy from Distributor
YOSUN ASIA/PACIFIC 2000 1 Buy from Distributor
COMPEL EUROPE 16382 1 Buy from Distributor
RS COMPONENTS EUROPE 1930 10 Buy from Distributor
Newark Element14 AMERICA 6 0 Buy from Distributor
MOUSER WORLDWIDE 2281 1 Buy from Distributor
Farnell Element14 EUROPE 3304 1 Buy from Distributor

代理商库存报告日期: 2021-11-27

代理商名称

DIGIKEY

库存

7127

Min.Order

1

地区

WORLDWIDE Buy from Distributor

YOSUN

库存

2000

Min.Order

1

地区

ASIA/PACIFIC Buy from Distributor

COMPEL

库存

16382

Min.Order

1

RS COMPONENTS

库存

1930

Min.Order

10

Newark Element14

库存

6

Min.Order

0

地区

AMERICA Buy from Distributor

MOUSER

库存

2281

Min.Order

1

地区

WORLDWIDE Buy from Distributor

Farnell Element14

库存

3304

Min.Order

1

代理商库存报告日期: 2021-11-27

ECCN (EU)

NEC

包装类型

Tube

封装

DIP-8

Operating Temperature (°C)

(最小值)

-

(最大值)

-

Budgetary Price (US$)* / Qty

0.3353 / 1k

Country of Origin

CHINA

(*) 建议转售单价(美元)仅用于预算用途。如需以当地货币计价的报价,请联系您当地的 ST销售办事处 或我们的 经销商