UCC2581 微功耗电压模式 PWM
UCC2581 描述
The UCC3581 voltage mode pulse width modulator is designed to control low power isolated DC - DC converters in applications such as Subscriber Line Power (ISDN I.430). Primarily used for single switch forward and flyback converters, the UCC3581 features BiCMOS circuitry for low startup and operating current, while maintaining the ability to drive power MOSFETs at frequencies up to 100kHz. The UCC3581 oscillator allows the flexibility to program both the frequency and the maximum duty cycle with two resistors and a capacitor. A TTL level input is also provided to allow synchronization to an external frequency source.
The UCC3581 includes programmable soft start circuitry, overcurrent detection, a 7.5V linear preregulator to control chip VDD during startup, and an on-board 4.
|
UCC2581 |
UCC3581 |
| Topology |
Boost, Flyback, Forward |
Boost, Buck, Flyback, Forward |
| Control Method |
Voltage Mode |
Voltage Mode |
| Duty Cycle(Max)(%) |
83 |
83 |
| Frequency(Max)(kHz) |
100 |
100 |
| UVLO Thresholds On/Off(V) |
7.3/6.8 |
7.3/6.8 |
| Pin/Package |
14SOIC |
14PDIP, 14SOIC |
| Regulated Outputs(#) |
1 |
1 |
| Operating Temperature Range(°C) |
-40 to 85 |
0 to 70 |
| Rating |
Catalog |
Catalog |
UCC2581 特性
- Low 85µA Startup Current
- Low 300µA Operating Current
- Automatically Disabled Startup Preregulator
- Programmable Minimum Duty Cycle with Cycle Skipping
- Programmable Maximum Duty Cycle
- Output Current 1A Peak Source and Sink
- Programmable Soft Start
- Programmable Oscillator Frequency
- External Oscillator Synchronization Capability
UCC2581 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| UCC2581D |
ACTIVE |
-40 to 85 |
1.60 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
UCC2581D |
| UCC2581DG4 |
ACTIVE |
-40 to 85 |
1.60 | 1ku |
SOIC (D) | 14 |
50 | TUBE |
UCC2581D |
| UCC2581DTR |
ACTIVE |
-40 to 85 |
1.55 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
UCC2581D |
| UCC2581DTRG4 |
ACTIVE |
-40 to 85 |
1.55 | 1ku |
SOIC (D) | 14 |
2500 | LARGE T&R |
UCC2581D |
| UCC2581J |
OBSOLETE |
-40 to 85 |
|
UTR | 0 |
|
|
| UCC2581Q |
OBSOLETE |
-40 to 85 |
|
UTR | 0 |
|
|
UCC2581 质量与无铅数据
| 器件 |
环保计划* |
铅/焊球涂层 |
MSL 等级/回流焊峰 |
环保信息与无铅 (Pb-free) |
DPPM / MTBF / FIT 率 |
| UCC2581D |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UCC2581D |
| UCC2581DG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCC2581DG4 |
UCC2581DG4 |
| UCC2581DTR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
|
UCC2581DTR |
| UCC2581DTRG4 |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-1-260C-UNLIM |
UCC2581DTRG4 |
UCC2581DTRG4 |
UCC2581 应用技术支持与电子电路设计开发资源下载
- UCC2581 数据资料 dataSheet 下载.PDF
- TI 德州仪器AC/DC 和 DC/DC 电源产品选型与价格参考 . xls
- Dual MOSFET Driver
(PDF 498 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
- Shelf-Life Evaluation of Lead-Free Component Finishes (PDF
1305 KB)
- Analog-to-Digital Converter Grounding Practices Affect System
Performance (PDF 56 KB)
- Principles of Data Acquisition and Conversion (PDF 50 KB)
- Interleaving Analog-to-Digital Converters (PDF 64 KB)
- What
Designers Should Know About Data Converter Drift (PDF 95 KB)
- Giving Delta-Sigma Converters a Gain Boost with a Front End
Analog Gain Stage (PDF 70 KB)
- Programming Tricks for Higher Conversion Speeds Utilizing Delta
Sigma Converters (PDF 105 KB)
UCC2581 工具与软件
