Datasheet > UC3842D-8

UC3842D-8

更新时间： 2024-11-25 13:39:11

品牌	Logo	应用领域
德州仪器 - TI		信息通信管理开关光电二极管
页数	文件大小	规格书
28页	768K
描述
1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-8

阅读下载

中文翻译

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

UC3842D-8 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	SOIC
包装说明：	SOP,	针数：	8
Reach Compliance Code：	compliant	风险等级：	5.07
Is Samacsys：	N	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	CURRENT-MODE	控制技术：	PULSE WIDTH MODULATION
最大输入电压：	25 V	最小输入电压：	11.5 V
标称输入电压：	15 V	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e4	长度：	4.9 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	8	最高工作温度：	70 °C
最低工作温度：		最大输出电流：	1 A
标称输出电压：	5 V	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	1.75 mm
表面贴装：	YES	切换器配置：	SINGLE
最大切换频率：	500 kHz	技术：	BICMOS
温度等级：	COMMERCIAL	端子面层：	NICKEL PALLADIUM GOLD
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	3.9 mm	Base Number Matches：	1

UC3842D-8 数据手册

UC1842/3/4/5

UC2842/3/4/5

UC3842/3/4/5

www.ti.com

SLUS223C–APRIL 1997–REVISED JUNE 2007

CURRENT MODE PWM CONTROLLER

FEATURES

DESCRIPTION

•

Optimized For Off-line and DC-to-DC

Converters

The UC1842/3/4/5 family of control devices provides

the necessary features to implement off-line or

dc-to-dc fixed frequency current mode control

•

Low Start-Up Current (<1 mA)

Automatic Feed Forward Compensation

Pulse-by-Pulse Current Limiting

Enhanced Load Response Characteristics

Under-Voltage Lockout With Hysteresis

Double Pulse Suppression

schemes with

a minimal external parts count.

Internally implemented circuits include under-voltage

lockout featuring start up current less than 1 mA, 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.

High Current Totem Pole Output

Internally Trimmed Bandgap Reference

500-kHz Operation

Differences between members of this family are the

under-voltage lockout thresholds and maximum duty

cycle ranges. The UC1842 and UC1844 have UVLO

thresholds of 16 V_ONand 10 V_OFF, ideally suited to

off-line applications. The corresponding thresholds

for the UC1843 and UC1845 are 8.4 V and 7.6 V.

The UC1842 and UC1843 can operate to duty cycles

approaching 100%. A range of zero to 50% is

obtained by the UC1844 and UC1845 by the addition

of an internal toggle flip flop which blanks the output

off every other clock cycle.

Low R_OError Amp

BLOCK DIAGRAM

7 12

UVLO

34 V

5 V

REF

S/R

8 14

GROUND

REF

5 V

50 mA

2.50 V

Internal

BIAS

VREF

Good

Logic

OSC

R /C

Error

Amp

OUTPUT

PWM

LATCH

POWER

GROUND

1 V

CURRENT

SENSE

COMP

COMPARATOR

CURRENT

SENSE

Note 1:

Note 2:

A = DIL−8 Pin Number. B = SO−14 and CFP−14 Pin Number.

Toggle flip flop used only in 1844 and 1845.

A/B

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...28

中文翻译

下载PDF

与UC3842D-8相关器件

型号	品牌	获取价格	描述	数据表
UC3842D8G4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3842D8TR	TI	获取价格	Current Mode PWM Controller
UC3842D8TR	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8, GREEN, PLASTIC, MS-012AA, SOIC-
UC3842D8TRG4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3842DG4	TI	获取价格	CURRENT MODE PWM CONTROLLER
UC3842DR	TI	获取价格	暂无描述
UC3842DR-8	TI	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO8
UC3842D-T	ETC	获取价格	Current-Mode SMPS Controller
UC3842DTR	TI	获取价格	Current Mode PWM Controller
UC3842DTR	ROCHESTER	获取价格	1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PDSO14, GREEN, PLASTIC, MS-012AB, SOIC

与UC3842D-8相关文章

解析光耦仿真器：升级光耦合器技术的必要性
2024-11-18

40
英伟达新一代Blackwell GPU过热问题致交付延迟
2024-11-18

32
国产厂商思特威CMOS图像传感器芯片单月出货超1亿颗，技术创新引领行业发展
2024-11-14

60
台积电5nm和3nm产能利用率达100%，半导体行业景气度持续攀升
2024-11-14

56

产品中心

服务支持

精选活动

关于我们

帮助中心

UC3842D-8

UC3842D-8 技术参数

UC3842D-8 数据手册

与UC3842D-8相关器件

与UC3842D-8相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

UC3842D-8

UC3842D-8 技术参数

UC3842D-8 数据手册

与UC3842D-8相关器件

与UC3842D-8相关文章

您还可以找

您在本页遇到什么问题？