5秒后页面跳转
捷配首页

Datasheet > 电源电路 > 开关式稳压器或控制器> UC3844Q
UC3844Q PDF预览

UC3844Q

更新时间： 2024-11-23 12:16:55
品牌 Logo 应用领域
德州仪器 - TI 稳压器开关式稳压器或控制器电源电路开关式控制器
页数 文件大小 规格书
28页 708K
描述
CURRENT MODE PWM CONTROLLER

阅读下载

中文翻译

获取价格

UC3844Q 技术参数

生命周期：Obsolete零件包装代码：QLCC
包装说明：PLASTIC, LCC-20针数：20
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.65
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：12 V
标称输入电压：15 VJESD-30 代码：S-PQCC-J20
长度：8.965 mm功能数量：1
端子数量：20最高工作温度：70 °C
最低工作温度：最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：QCCJ
封装等效代码：LDCC20,.4SQ封装形状：SQUARE
封装形式：CHIP CARRIER认证状态：Not Qualified
座面最大高度：4.57 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：PUSH-PULL
最大切换频率：500 kHz技术：BIPOLAR
温度等级：COMMERCIAL端子形式：J BEND
端子节距：1.27 mm端子位置：QUAD
宽度：8.965 mmBase Number Matches：1

UC3844Q 数据手册

 浏览型号UC3844Q的Datasheet PDF文件第2页浏览型号UC3844Q的Datasheet PDF文件第3页浏览型号UC3844Q的Datasheet PDF文件第4页浏览型号UC3844Q的Datasheet PDF文件第5页浏览型号UC3844Q的Datasheet PDF文件第6页浏览型号UC3844Q的Datasheet PDF文件第7页 
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 VON and 10 VOFF, 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 RO Error Amp  
BLOCK DIAGRAM  
V
cc  
7 12  
UVLO  
34 V  
5 V  
REF  
S/R  
8 14  
5
4
9
7
GROUND  
V
REF  
5 V  
50 mA  
2.50 V  
Internal  
BIAS  
VREF  
Good  
Logic  
7
11  
V
C
OSC  
R /C  
T
T
6
10  
T
Error  
Amp  
OUTPUT  
S
2R  
R
5
8
PWM  
LATCH  
2
1
3
3
1
5
V
FB  
R
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.  
Copyright © 1997–2007, Texas Instruments Incorporated  
1234567...28

中文翻译

下载PDF

与UC3844Q相关器件

型号 品牌 获取价格 描述 数据表
UC3844QTR TI

获取价格

 		1A SWITCHING CONTROLLER, 500kHz SWITCHING FREQ-MAX, PQCC20, PLASTIC, LCC-20
UC3844-S08-R UTC

获取价格

 		HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844-S08-T UTC

获取价格

 		HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3844T STMICROELECTRONICS

获取价格

 		HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3844TD STMICROELECTRONICS

获取价格

 		HIGH PERFORMANCE CURRENT MODE PWM CONTROLLER
UC3844TN ETC

获取价格

 		Analog IC
UC3844W ETC

获取价格

 		SMPS Controller
UC3844Y TI

获取价格

 		CURRENT MODE PWM CONTROLLER
UC3845 UTC

获取价格

 		HIGH PERFORMANCE CURRENT MODE PWM CONTROLLERS
UC3845 STMICROELECTRONICS

获取价格

 		CURRENTMODE PWM CONTROLLER

与UC3844Q相关文章

您还可以找


热门产品
PCB打样/小批量
铝基板
BOM智能配单
PCBA制造
钣金
精密CNC
模具注塑
薄膜开关
精选活动
PCBA打样特惠
四六层板品质升级
铝基板品质升级
一体化电子制造
DFM下载
服务支持
企业认证
产品展示
工厂展示
工艺能力
积分商城
关于捷配
捷配简介
企业文化
公司动态
人才招聘
联系我们
帮助中心
下单流程
付款流程
开票流程
常见问题
全球PCB制造服务专线 400-613-0088

工作时间：9:00-21:00

CEO邮箱：ceo@jiepei.com

投诉邮箱：tousu@jiepei.com

捷配网-微信公众号 微信公众号
捷配网-微信公众号 抖音公众号
资质认证：
合作快递：
支付方式：
Copyright © 2024 Jiepei.com Inc. All Rights Reserved. 版权所有:杭州捷配信息科技有限公司 浙公网安备 33010502006866号 浙ICP备10014259号-119 营业执照ICP证