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UC1825-SP
- QML-V Qualified, SMD 5962-87681
- Rad-Tolerant: 30 kRad (Si) TID(1)
- Compatible With Voltage- or Current-Mode Topologies
- Practical Operation Switching Frequencies to 1 MHz
- 50-ns Propagation Delay-to-Output
- High-Current Dual Totem Pole Outputs (1.5 A Peak)
- Wide Bandwidth Error Amplifier
- Fully Latched Logic With Double-Pulse Suppression
- Pulse-by-Pulse Current Limiting
- Soft Start/Maximum Duty-Cycle Control
- Undervoltage Lockout With Hysteresis
- Low Start-Up Current (1.1 mA)
(1) Radiation tolerance is a typical value based upon initial device qualification with dose rate = 10 mrad/sec. Radiation Lot Acceptance Testing is available - contact factory for details.
The UC1825 PWM control device is optimized for high-frequency switched mode power supply applications. Particular care was given to minimizing propagation delays through the comparators and logic circuitry while maximizing bandwidth and slew rate of the error amplifier. This controller is designed for use in either current-mode or voltage mode systems with the capability for input voltage feed-forward.
Protection circuitry includes a current limit comparator with a 1-V threshold, a TTL compatible shutdown port, and a soft start pin which will double as a maximum duty-cycle clamp. The logic is fully latched to provide jitter-free operation and prohibit multiple pulses at an output. An undervoltage lockout section with 800 mV of hysteresis assures low start up current. During undervoltage lockout, the outputs are high impedance.
This device features totem pole outputs designed to source and sink high peak currents from capacitive loads, such as the gate of a power MOSFET. The on state is designed as a high level.
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技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | High-Speed PWM Controller. datasheet (Rev. A) | 2012/3/22 | |||
| * | 輻射及可靠性報告 | UC1825-SP Radiation Test Report (5962-8768104VEA) | 2015/5/8 | |||
| * | SMD | UC1825-SP SMD 5962-87681 | 2016/7/8 | |||
| 選擇指南 | TI Space Products (Rev. L) | 2026/3/27 | ||||
| 應用說明 | Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form (Rev. A) | PDF | HTML | 2025/11/5 | |||
| 應用說明 | Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. B) | PDF | HTML | 2025/6/10 | |||
| 更多文件說明 | TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. B) | 2025/2/20 | ||||
| 應用說明 | QML flow, its importance, and obtaining lot information (Rev. C) | 2023/8/30 | ||||
| 應用說明 | Single-Event Effects Confidence Interval Calculations (Rev. A) | PDF | HTML | 2022/10/19 | |||
| Application brief | Controlling Input Power for Present and Next-Generation Power Controllers | PDF | HTML | 2020/12/14 | |||
| 應用說明 | DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer | 2020/8/21 | ||||
| 電子書 | Radiation Handbook for Electronics (Rev. A) | 2019/5/21 |
設計與開發
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| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| LCCC (FK) | 20 | Ultra Librarian |
| CDIP (J) | 16 | Ultra Librarian |
訂購與品質
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