UCC28250RGPT ,Advanced PWM Controller with Pre-Bias Operation 20-QFN -40 to 125Features 3 DescriptionThe UCC28250 PWM controller is designed for high1• Prebiased Start-uppower de ..
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UCC2837 ,8-Pin N-FET Linear Regulator Controllerfeatures re-External N-MOSFETquired for an extremely low dropout linear regulator that uses an exte ..
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UPA1703G , SWITCHING N-CHANNEL POWER MOS FET INDUSTRIAL USE
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UCC28250RGPT
Advanced PWM Controller with Pre-Bias Operation
Support & Reference Product Order Tools & Technical Community Design Folder Now Documents Software UCC28250 SLUSA29D – APRIL 2010 – REVISED AUGUST 2015 UCC28250 Advanced PWM Controller With Prebias Operation 1 Features 3 Description The UCC28250 PWM controller is designed for high 1• Prebiased Start-up power density applications that may have stringent • Synchronous Rectifier Control Outputs With prebiased start-up requirements. The integrated Programmable Delays (Including Zero Delay synchronous rectifier control outputs target high- Support) efficiency and high-performance topologies such as • Voltage Mode Control With Input Voltage Feed- half-bridge, full-bridge, interleaved forward, and push- pull. The UCC27200 half-bridge drivers and Forward or Current Mode Control UCC2732X MOSFET drivers used in conjunction with • Primary or Secondary-Side Control the UCC28250 provide a complete power converter • 3.3-V, 1.5% Accurate Reference Output solution. • 1-MHz Capable Switching Frequency Externally programmable soft-start, used in • 1% Accurate Cycle-by-Cycle Overcurrent conjunction with an internal prebiased start-up circuit, Protection with Matched Duty Cycle Outputs allows the controller to gradually reach a steady-state operating point under all output conditions. The • Programmable Soft-Start and Hiccup Restart UCC28250 can be configured for primary or Timer secondary-side control and either voltage or current • Thermally Enhanced 4-mm × 4-mm QFN-20 mode control can be implemented. Package and 20-pin TSSOP Package The oscillator operates at frequencies up to 2 MHz, and can be synchronized to an external clock. Input 2 Applications voltage feedforward, cycle-by-cycle current limit, and • Half-Bridge, Full-Bridge, Interleaved Forward, and a programmable hiccup timer allow the system to Push-Pull Isolated Converters stay within a safe operation range. Input voltage, output voltage and temperature protection can be • Telecom and Data-com Power implemented. Dead time between primary-side switch • Wireless Base Station Power and secondary-side synchronous rectifiers can be • Server Power independently programmed. • Industrial Power Systems (1) Device Information PART NUMBER PACKAGE BODY SIZE (NOM) TSSOP (20) 6.50 mm × 4.40 mm UCC28250 VQFN (20) 4.00 mm × 3.50 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Application Diagram VIN (36 V ~ 75 V) VIN (36 V ~ 75 V) UCC27200 UCC28250 V OUT OVP OUTA HI HI RAMP OUTB LO LO RT SRA Isolation UCC2732x SS SRB COMP Feedback and Isolation GND Not Shown: PS, SP, HICC, VDD, EA+, EA-, VREF, EN, ILIM, AND VSENSE 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA.
