LM5020
- Internal Start-up Bias Regulator
- Error Amplifier
- Precision Voltage Reference
- Programmable Softstart
- 1A Peak Gate Driver
- Maximum Duty Cycle Limiting (80% for LM5020-1 or 50% for LM5020-2)
- Programmable Line Under Voltage Lockout (UVLO) with Adjustable Hysteresis
- Cycle-by-Cycle Over-Current Protection
- Slope Compensation (LM5020-1)
- Programmable Oscillator Frequency with Synchronization Capability
- Current Sense Leading Edge Blanking
- Thermal Shutdown Protection
The LM5020 high voltage pulse-width-modulation (PWM) controller contains all of the features needed to implement single ended primary power converter topologies. Output voltage regulation is based on current-mode control, which eases the design of loop compensation while providing inherent line feed-forward. The LM5020 includes a high-voltage start-up regulator that operates over a wide input range up to 100V. The PWM controller is designed for high speed capability including an oscillator frequency range to 1MHz and total propagation delays less than 100ns. Additional features include an error amplifier, precision reference, line under-voltage lockout, cycle-by-cycle current limit, slope compensation, softstart, oscillator synchronization capability and thermal shutdown. The controller is available in both MSOP-10 and LLP-10 packages.
技术文档
| 顶层文档 | 类型 | 标题 | 格式选项 | 下载最新的英语版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 数据表 | LM5020 100V Current Mode PWM Controller 数据表 (Rev. F) | 2006-4-14 | |||
| 选择指南 | 电源管理指南 2018 | 2018-7-31 | ||||
| 技术文章 | Flyback converters: two outputs are better than one | PDF | HTML | 2016-11-24 | |||
| 技术文章 | What is behind isolated DC/DC converter voltage regulation? | PDF | HTML | 2015-8-31 | |||
| 用户指南 | Dual Output Isolated Flyback Design:User Guide | 2012-1-27 | ||||
| 应用手册 | An Alternative Approach to Higher-Power Boost Converters | 2009-11-30 | ||||
| 白皮书 | PWM DC-DC Cntrllrs w/Built-In Strt-Up Regs Simp Switch Pwr Supply Design | 2005-10-1 |
设计与开发
如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。
LM5020EVAL — 100V 电流模式 PWM 控制器反向评估板
100V Current Mode PWM Controller Flyback Evaluation Board
PSEMTHR24EVM-081 — 适用于 24 端口 IEEE 802.3bt 就绪型 PSE 系统的主板
PSEMTHR24EVM-081 是 TPS23881 和 TPS23882 PSE 控制器的基板。该基板包含 24 个 2 线对/4 线对端口，可用于发送高达 30W/端口（对于 IEEE 802.3at 应用）和 90W/端口（对于 IEEE 802.3bt 应用）的功率。
FLYBUCK-FLYBACK-DESIGN-CALC — Flybuck / Flyback Calculator
该工具可帮助电源工程师根据规范选择合适的隔离式 DC-DC 拓扑。根据所选的拓扑，计算器还会针对设计推荐合适的 IC。
许多 TI 参考设计都包括 LM5020
通过我们的参考设计选择工具来审查并确定最适用于您应用和参数的设计。
| 封装 | 引脚 | CAD 符号、封装和 3D 模型 |
|---|---|---|
| VSSOP (DGS) | 10 | Ultra Librarian |
| WSON (DPR) | 10 | Ultra Librarian |
订购和质量
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