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UC2901MDREPG4 数据表(PDF) 1 Page - Texas Instruments |
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UC2901MDREPG4 数据表(HTML) 1 Page - Texas Instruments |
1 / 9 page RT VREF NI INV COMP STATUS +VIN CT EXTCLK N/C DRIVERB DRIVERA GND N/C DPACKAGE (TOP VIEW) N/C = No internal connection UC2901-EP www.ti.com SLUS709A – DECEMBER 2006 – REVISED MARCH 2010 ISOLATED FEEDBACK GENERATOR Check for Samples: UC2901-EP 1 FEATURES • Controlled Baseline • Internal Carrier Oscillator Usable to 5 MHz – One Assembly/Test Site, One Fabrication • Modulator Synchronizable to an External Site Clock • Extended Temperature Performance of –55°C • Loop Status Monitor to 125°C • Enhanced Diminishing Manufacturing Sources (DMS) Support • Enhanced Product-Change Notification • Qualification Pedigree (1) • Amplitude-Modulation System for Transformer Coupling an Isolated Feedback Error Signal • Low-Cost Alternative to Optical Couplers • Internal 1% Reference and Error Amplifier (1) Component qualification in accordance with JEDEC and industry standards to ensure reliable operation over an extended temperature range. This includes, but is not limited to, Highly Accelerated Stress Test (HAST) or biased 85/85, temperature cycle, autoclave or unbiased HAST, electromigration, bond intermetallic life, and mold compound life. Such qualification testing should not be viewed as XXX justifying use of this component beyond specified performance and environmental limits. DESCRIPTION The UC2901 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, UC2901 features an amplitude modulation system that allows a loop error signal to be coupled with a small RF transformer or capacitor. The programmable, high-frequency oscillator within the UC2901 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 an SMPS. An additional feature is a status monitoring circuit that 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. Because these devices also can be used as a DC driver for optical couplers, the benefits of 4.5 V to 40 V supply operation, a 1% accurate reference, and a high-gain general-purpose amplifier offer advantages, even though an AC system may not be desired. ORDERING INFORMATION TA PACKAGE(1) ORDERABLE PART NUMBER TOP-SIDE MARKING –55°C to 125°C D (SOIC) UC2901MDREP UC2901MEP (1) Package drawings, standard packing quantities, thermal data, symbolization, and PCB design guidelines are available at www.ti.com/sc/package. 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. PRODUCTION DATA information is current as of publication date. Copyright © 2006–2010, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
类似零件编号 - UC2901MDREPG4 |
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类似说明 - UC2901MDREPG4 |
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