UC1901-SP
- An Amplitude-Modulation System for Transformer Coupling an Isolated Feedback Error Signal
- Low-Cost Alternative to Optical Couplers
- Internal 1% Reference and Error Amplifier
- Internal Carrier Oscillator Usable to 5MHz
- Modulator Synchronizable to an External Clock
- Loop Status Monitor
The UC1901 family is designed to solve many of the problems associated with closing a feedback control loop across a voltage isolation boundary. As a stable and reliable alternative to an optical coupler, these devices feature an amplitude modulation system which allows a loop error signal to be coupled with a small RF transformer or capacitor.
The programmable, high-frequency oscillator within the UC1901 series permits the use of smaller, less expensive transformers which can readily be built to meet the isolation requirements of today's line-operated power systems. As an alternative to RF operation, the external clock input to these devices allows synchronization to a system clock or to the switching frequency of a SMPS.
An additional feature is a status monitoring circuit which provides an active-low output when the sensed error voltage is within ±10% of the reference. The DRIVERA output, DRIVERB output, and STATUS output are disabled until the input supply has reached a sufficient level to allow proper operation of the device.
Since these devices can also be used as a DC driver for optical couplers, the benefits of 4.5 to 40V supply operation, a 1% accurate reference, and a high gain general purpose amplifier offer advantages even though an AC system may not be desired.
技術文件
類型 | 標題 | 日期 | ||
---|---|---|---|---|
* | Data sheet | Isolated Feedback Generator datasheet (Rev. A) | 2010年 1月 13日 | |
* | SMD | UC1901-SP SMD 5962-89441 | 2016年 7月 8日 | |
More literature | TI Engineering Evaluation Units vs. MIL-PRF-38535 QML Class V Processing (Rev. A) | 2023年 8月 31日 | ||
Application note | QML flow, its importance, and obtaining lot information (Rev. C) | 2023年 8月 30日 | ||
Application note | Heavy Ion Orbital Environment Single-Event Effects Estimations (Rev. A) | PDF | HTML | 2022年 11月 17日 | |
Application note | Single-Event Effects Confidence Interval Calculations (Rev. A) | PDF | HTML | 2022年 10月 19日 | |
Selection guide | TI Space Products (Rev. I) | 2022年 3月 3日 | ||
Application note | DLA Standard Microcircuit Drawings (SMD) and JAN Part Numbers Primer | 2020年 8月 21日 | ||
Application note | Hermetic Package Reflow Profiles, Termination Finishes, and Lead Trim and Form | PDF | HTML | 2020年 5月 18日 | |
E-book | Radiation Handbook for Electronics (Rev. A) | 2019年 5月 21日 | ||
Application note | The UC1901 Simplifies the Problem of Isolated Feedback in Switching Regulators | 1999年 9月 5日 |
設計與開發
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封裝 | 引腳 | 下載 |
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CDIP (J) | 14 | 檢視選項 |
訂購與品質
- RoHS
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