UC1825A 高速 PWM 控制器
The UC3823A and UC3823B and the UC3825A and UC3825B family of PWM controllers are improved versions of the standard UC3823 and UC3825 family. Performance enhancements have been made to several of the circuit blocks. Error amplifier gain bandwidth product is 12 MHz, while input offset voltage is 2 mV. Current limit threshold is assured to a tolerance of 5%. Oscillator discharge current is specified at 10 mA for accurate dead time control. Frequency accuracy is improved to 6%. Startup supply current, typically 100 µA, is ideal for off-line applications. The output drivers are redesigned to actively sink current during UVLO at no expense to the startup current specification. In addition each output is capable of 2-A peak currents during transitions.
| UC1825A | |
| Control Method | Current |
| Duty Cycle (Max) (%) | 50 |
| Frequency (Max) (kHz) | 1000 |
| UVLO Thresholds On/Off (V) | 16/10 |
| Pin/Package | 16CDIP, 20LCCC |
| Vin (Min) (V) | 8.4 |
| Vin (Max) (V) | 22 |
| Regulated Outputs (#) | 2 |
| Operating Temperature Range (C) | -55 to 125 |
| Rating | Military |
UC1825A 特性
- Improved Versions of the UC3823/UC3825 PWMs
- Compatible with Voltage-Mode or Current-Mode Control Methods
- Practical Operation at Switching Frequencies to 1 MHz
- 50-ns Propagation Delay to Output
- High-Current Dual Totem Pole Outputs (2-A Peak)
- Trimmed Oscillator Discharge Current
- Low 100-µA Startup Current
- Pulse-by-Pulse Current Limiting Comparator
- Latched Overcurrent Comparator With Full Cycle Restart
UC1825A 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 |
| 5962-87681022A | ACTIVE | -55 to 125 | 28.30 | 100u | LCCC (FK) | 20 | 1 | TUBE | |
| 5962-8768102EA | ACTIVE | -55 to 125 | 21.99 | 100u | CDIP (J) | 16 | 1 | TUBE | |
| UC1825AJ | ACTIVE | -55 to 125 | 14.91 | 100u | CDIP (J) | 16 | 1 | TUBE | |
| UC1825AJ883B | ACTIVE | -55 to 125 | 21.99 | 100u | CDIP (J) | 16 | 1 | TUBE | |
| UC1825AL | ACTIVE | -55 to 125 | 22.38 | 100u | LCCC (FK) | 20 | 1 | TUBE | |
| UC1825AL883B | ACTIVE | -55 to 125 | 28.30 | 100u | LCCC (FK) | 20 | 1 | TUBE |
UC1825A 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 |
| 5962-87681022A | TBD | Call TI | Call TI | 5962-87681022A | 5962-87681022A |
| 5962-8768102EA | TBD | Call TI | Call TI | 5962-8768102EA | 5962-8768102EA |
| UC1825AJ | TBD | A42 | N/A for Pkg Type | UC1825AJ | UC1825AJ |
| UC1825AJ883B | TBD | A42 | N/A for Pkg Type | UC1825AJ883B | UC1825AJ883B |
| UC1825AL | TBD | POST-PLATE | N/A for Pkg Type | UC1825AL | UC1825AL |
| UC1825AL883B | TBD | POST-PLATE | N/A for Pkg Type | UC1825AL883B | UC1825AL883B |
UC1825A 工具与软件
| 培训内容 | 型号 | 软件/工具类型 |
| 最常用开关模式电源的功率级设计器 | POWERSTAGE-DESIGNER | 分析软件 |
UC1825A 应用技术支持与电子电路设计开发资源下载
- UC1825A数据资料 dataSheet 下载.PDF
- TI 德州仪器电源管理选型与价格参考 . xls
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