Datasheet Texas Instruments UC3841J — 数据表
制造商 | Texas Instruments |
系列 | UC3841 |
零件号 | UC3841J |
可编程离线PWM控制器18-CDIP 0至70
数据表
价格
状态
Lifecycle Status | Obsolete (Manufacturer has discontinued the production of the device) |
Manufacture's Sample Availability | No |
打包
Pin | 18 |
Package Type | J |
Industry STD Term | CDIP |
JEDEC Code | R-GDIP-T |
Width (mm) | 6.92 |
Length (mm) | 23.1 |
Thickness (mm) | 4.57 |
Pitch (mm) | 2.54 |
Max Height (mm) | 5.08 |
Mechanical Data | 下载 |
参数化
Approx. Price (US$) | 7.56 | 1ku |
Control Method | Peak Current Mode |
Duty Cycle(Max)(%) | 100 |
Frequency(Max)(kHz) | 500 |
Frequency(Min)(kHz) | 26 |
Gate Drive(Typ)(A) | 1 |
Operating Temperature Range(C) | 0 to 70 |
Package Group | PDIP |
Rating | Catalog |
Special Features | Error Amplifier Multi-topology Soft Start Synchronization Pin |
Topology | Boost Buck Buck-Boost Flyback Forward |
UVLO Thresholds On/Off(V) | 8/7.8 |
Vin(Max)(V) | 400 |
Vin(Min)(V) | 9 |
生态计划
RoHS | Not Compliant |
Pb Free | No |
应用须知
- DN-28 UC3840/UC3841/UC3851 PWM Controllers - Summary of Functions & DifferencesPDF, 22 Kb, 档案已发布: Sep 5, 1999
The UC3840/UC3841 and UC3851 PWM controllers incorporate numerous protection features for switch mode power supplies. The list includes programmable undervoltage lockout thresholds, programmable current-limit thresholds, overvoltage protection, soft-start, and external stop/reset capability. While these controllers are similar in concept, there are subtle differences among them in the operation of - Conditioning a Switch-mode Power Supply Current Signal Using TI Op AmpsPDF, 61 Kb, 档案已发布: Mar 23, 2000
The switch-mode power supply primary current is often sensed using a power resistor. Using an op amp to amplify the current-sense signal can reduce cost and improve noise performance and efficiency. This report reviews the advantages of using an op amp circuit and analyzes the design criteria needed to choose the proper op amp.
模型线
制造商分类
- Semiconductors > Power Management > Offline and Isolated DC/DC Controllers and Converters > PWM and Resonant Controller