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TL3845DRE4 PDF预览

TL3845DRE4

更新时间： 2024-11-05 03:59:31
品牌 Logo 应用领域
德州仪器 - TI 控制器
页数 文件大小 规格书
18页 400K
描述
CURRENT-MODE PWM CONTROLLERS

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TL3845DRE4 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：SOP, SOP14,.25针数：14
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.17
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：PULSE WIDTH MODULATION最大输入电压：30 V
最小输入电压：12 V标称输入电压：15 V
JESD-30 代码：R-PDSO-G14JESD-609代码：e4
长度：8.65 mm湿度敏感等级：1
功能数量：1端子数量：14
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：SOP封装等效代码：SOP14,.25
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子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：SINGLE
最大切换频率：500 kHz技术：BIPOLAR
温度等级：COMMERCIAL端子面层：Nickel/Palladium/Gold (Ni/Pd/Au)
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 mmBase Number Matches：1

TL3845DRE4 数据手册

 浏览型号TL3845DRE4的Datasheet PDF文件第2页浏览型号TL3845DRE4的Datasheet PDF文件第3页浏览型号TL3845DRE4的Datasheet PDF文件第4页浏览型号TL3845DRE4的Datasheet PDF文件第5页浏览型号TL3845DRE4的Datasheet PDF文件第6页浏览型号TL3845DRE4的Datasheet PDF文件第7页 
TL284x, TL384x  
CURRENT-MODE PWM CONTROLLERS  
SLVS038F – JANUARY 1989 – REVISED FEBRUARY 2003  
D PACKAGE  
(TOP VIEW)  
Optimized for Off-Line and dc-to-dc  
Converters  
Low Start-Up Current (<1 mA)  
COMP  
NC  
REF  
13 NC  
1
2
3
4
5
6
7
14  
Automatic Feed-Forward Compensation  
Pulse-by-Pulse Current Limiting  
Enhanced Load-Response Characteristics  
Undervoltage Lockout With Hysteresis  
Double-Pulse Suppression  
12  
11  
10  
9
VFB  
V
CC  
NC  
VC  
ISENSE  
NC  
OUTPUT  
GND  
8
POWER GROUND  
RT/CT  
High-Current Totem-Pole Output  
Internally Trimmed Bandgap Reference  
500-kHz Operation  
NC – No internal connection  
D-8 OR P PACKAGE  
(TOP VIEW)  
Error Amplifier With Low Output  
Resistance  
COMP  
VFB  
ISENSE  
RT/CT  
REF  
1
2
3
4
8
7
6
5
Designed to Be Interchangeable With  
UC2842 and UC3842 Series  
V
CC  
OUTPUT  
GND  
description/ordering information  
The TL284x and TL384x series of control  
integrated circuits provide the features that are  
necessary to implement off-line or dc-to-dc fixed-frequency current-mode control schemes, with a minimum  
number of external components. Some of the internally implemented circuits are an undervoltage lockout  
(UVLO), featuring a start-up current of less than 1 mA, and a precision reference trimmed for accuracy at the  
error amplifier input. Other internal circuits include logic to ensure latched operation, a pulse-width modulation  
(PWM) comparator (that 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 when it is in the  
off state.  
Major differences between members of these series are the UVLO thresholds and maximum duty-cycle ranges.  
TypicalUVLOthresholdsof16V(on)and10V(off)ontheTLx842andTLx844devicesmakethemideallysuited  
to off-line applications. The corresponding typical thresholds for the TLx843 and TLx845 devices are 8.4 V (on)  
and 7.6 V (off). The TLx842 and TLx843 devices can operate to duty cycles approaching 100%. A duty-cycle  
range of 0 to 50% is obtained by the TLx844 and TLx845 by the addition of an internal toggle flip-flop, which  
blanks the output off every other clock cycle.  
The TL284x-series devices are characterized for operation from –40°C to 85°C. The TL384x-series devices are  
characterized for operation from 0°C to 70°C.  
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.  
Copyright 2003, Texas Instruments Incorporated  
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of Texas Instruments  
standard warranty. Production processing does not necessarily include  
testing of all parameters.  
1
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265  
1234567...18

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