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UC2577T-ADJ Datenblatt(PDF) 1 Page - Texas Instruments |
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UC2577T-ADJ Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 8 page Simple Step-Up Voltage Regulator • Requires Few External Components • NPN Output Switches 3.0A, 65V(max) • Extended Input Voltage Range: 3.0V to 40V • Current Mode Operation for Improved Transient Response, Line Regulation, and Current Limiting • Soft Start Function Provides Controlled Startup • 52kHz Internal Oscillator • Output Switch Protected by Current Limit, Undervoltage Lockout and Thermal Shutdown • Improved Replacement for LM2577-ADJ Series The UC2577-ADJ device provides all the active functions neces- sary to implement step-up (boost), flyback, and forward converter switching regulators. Requiring only a few components, these sim- ple regulators efficiently provide up to 60V as a step-up regulator, and even higher voltages as a flyback or forward converter regula- tor. The UC2577-ADJ features a wide input voltage range of 3.0V to 40V and an adjustable output voltage. An on-chip 3.0A NPN switch is included with undervoltage lockout, thermal protection circuitry, and current limiting, as well as soft start mode operation to reduce current during startup. Other features include a 52kHz fixed fre- quency on-chip oscillator with no external components and current mode control for better line and load regulation. A standard series of inductors and capacitors are available from several manufacturers optimized for use with these regulators and are listed in this data sheet. UC2577-ADJ 3/97 FEATURES DESCRIPTION CONNECTION DIAGRAM BLOCK DIAGRAM UDG-94034 • Simple Boost and Flyback Converters • SEPIC Topology Permits Input Voltage to be Higher or Lower than Output Voltage • Transformer Coupled Forward Regulators • Multiple Output Designs TYPICAL APPLICATIONS 5-Pin TO-220 (Top View) T Package Also available in TO-263 Package (TD). |
Ähnliche Teilenummer - UC2577T-ADJ |
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Ähnliche Beschreibung - UC2577T-ADJ |
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