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| 型号： | UCC2891DR |
| 厂商： | Texas Instruments |
| 文件页数： | 26/41页 |
| 文件大小： | 0K |
| 描述： | IC REG CTRLR FLYBK ISO CM 16SOIC |
| 标准包装： | 2,500 |
| PWM 型： | 电流模式 |
| 输出数： | 1 |
| 频率 - 最大： | 1MHz |
| 占空比： | 74% |
| 电源电压： | 8.5 V ~ 16 V |
| 降压： | 无 |
| 升压： | 无 |
| 回扫： | 是 |
| 反相： | 无 |
| 倍增器： | 无 |
| 除法器： | 无 |
| Cuk： | 无 |
| 隔离： | 是 |
| 工作温度： | -40°C ~ 125°C |
| 封装/外壳： | 16-SOIC（0.154"，3.90mm 宽） |
| 包装： | 带卷 (TR) |
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UCC2891, UCC2892
UCC2893, UCC2894
SLUS542F ? OCTOBER 2003 ? REVISED JULY 2009
ADDITIONAL APPLICATION INFORMATION
This solution uses the regulated output voltage across the output inductor during the freewheeling period to
generate a quasi-regulated bias for the control circuits.
Both of the illustrated solution provides reliable bias power during normal operation. Note that in both cases,
the bias voltages are proportional to the output voltage. This nature of the bootstrap bias supply causes the
converter to operate in a hiccup mode under significant overload or under short-circuit conditions as the
bootstrap winding is not able to hold the bias rail above the undervoltage lockout threshold of the controller.
ADDITIONAL APPLICATION INFORMATION
References and Additional Development Tools
1. Evaluation Module: UCC2891EVM, 48-V to 3.3-V, 30-A Forward Converter with Active Clamp Reset.
2. User ’s Guide: Using the UCC2891EVM, 48-V to 3.3-V, 30-A Forward Converter with Active Clamp Reset,
(SLUU178)
3. Application Note: Designing for High Efficiency with the UCC2891 Active Clamp PWM Controller, Steve
Mappus (SLUA303)
4. Power Supply Design Seminar Topic: Design Considerations for Active Clamp and Reset Technique, D.
Dalal, SEM1100?Topic3 (SLUP112)
5. Power Supply Design Seminar Topic: Active Clamp and Reset Technique Enhances Forward Converter
Performance, B. Andreycak, SEM1000?Topic 3. (SLUP108)
6. Power Supply Design Seminar Topic: Design and Application Guide for High Speed MOSFET Gate Drive
Circuits, L. Balogh, SEM1400?Topic 2 (SLUP169)
7. Datasheet: UCC3580, Single Ended Active-Clamp/Reset PWM Controller, (SLUS292A)
8. Evaluation Module: UCC3580EVM, Flyback Converters, Active Clamp vs. Hard?Switched (SLUU085)
9. Reference Designs: Highly Efficient 100W Isolated Power Supply Reference Design Using UCC3580?1,
Texas Instruments Hardware Reference Design Number PMP206?C (SLUU146)
10. Reference Designs: Active Clamp Forward Reference Design using UCC3580?1. Texas Instruments
Hardware Reference Design Number PMP368 (SLVR053, SLVR079, SLVR096)
Reference Circuit
For completeness, the schematic diagram of a complete active clamp forward converter is shown in Figure 14.
The detailed description of the circuit operation and design procedure can be found in SLUU178.
26
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UCC2891DRG4 | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2891EVM | 功能描述:电源管理IC开发工具 UCC2891 Eval Mod RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| UCC2891EVM-520 | 功能描述:电源管理IC开发工具 Eval Mod for UCC289 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| UCC2891PW | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
| UCC2891PWG4 | 功能描述:电流型 PWM 控制器 Current Mode Active Clamp RoHS:否 制造商:Texas Instruments 开关频率:27 KHz 上升时间: 下降时间: 工作电源电压:6 V to 15 V 工作电源电流:1.5 mA 输出端数量:1 最大工作温度:+ 105 C 安装风格:SMD/SMT 封装 / 箱体:TSSOP-14 |
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