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UCC256302 Dataheets PDF



Part Number UCC256302
Manufacturers Texas Instruments
Logo Texas Instruments
Description LLC Resonant Controller
Datasheet UCC256302 DatasheetUCC256302 Datasheet (PDF)

Product Folder Order Now Technical Documents Tools & Software Support & Community UCC256302 SLUSD69 – NOVEMBER 2017 UCC256302 LLC Resonant Controller with High Voltage Startup Enabling Low Standby Power 1 Features •1 Integrated High Voltage Startup – Eliminates Need for External Bias Supply • Best-in-Class Transient Response • Hybrid Hysteretic Control (HHC) – Best-in-Class Transient Response – Easy Compensation Design • Optimized Low Power Features Enable 75 mW Standby Power Design with P.

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Product Folder Order Now Technical Documents Tools & Software Support & Community UCC256302 SLUSD69 – NOVEMBER 2017 UCC256302 LLC Resonant Controller with High Voltage Startup Enabling Low Standby Power 1 Features •1 Integrated High Voltage Startup – Eliminates Need for External Bias Supply • Best-in-Class Transient Response • Hybrid Hysteretic Control (HHC) – Best-in-Class Transient Response – Easy Compensation Design • Optimized Low Power Features Enable 75 mW Standby Power Design with PFC on – Advanced Burst Mode Opto-Coupler Low Power Operation – Helps Enable Compliance to CoC Tier II Standard • Fast Exit from Burst Mode • Improved Capacitive Region Avoidance Scheme • Adaptive Dead-Time • Internal High-Side Gate Drivers (0.6-A and 1.2-A Capability) • Robust Soft Start with No Hard Switching • Over Temperature, Output Over Voltage, Input Over and Under Voltage Protection with Three Levels of Over Current Protections • Wide Operating Frequency Range (35 kHz to 1 MHz) • Select the appropriate LLC resonant controller for your design with UCC25630x Selection GuideUCC25630x Selection Guide • Create a Custom Design Using the UCC256302 With the WEBENCH® Power Designer 3 Description The UCC256302 is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed for use in offline AC-DC or isolated DC-DC to provide a complete power system using a minimum of external components. The resulting power system is designed to meet the most stringent requirements for standby power without the need for a separate standby power converter. UCC256302 includes an integrated, high voltage startup function which eliminates the need for an external bias supply, reducing BOM count and minimizing solution size. UCC256302 uses hybrid hysteretic control to provide best in class line and load transient response. The control makes the open loop transfer function a first order system so that it’s very easy to compensate. UCC256302 provides a high efficient burst mode with consistent burst power level during each burst on cycle. The burst power level is programmable and adaptively changes with input voltage, making the optimization of efficiency very easy. Select the appropriate LLC resonant controller for your design with UCC25630x Selection Guide Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) UCC256302 SOIC (14) 9.9 mm x 3.9 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Schematic 2 Applications • Digital TV SMPS • AC-DC Adapter • Multi-Functional Printers • Projectors • Merchant DC-to-DC • High Power Battery Charging • DIN Rail Power Supply • Multi-Axis Servo • ATX Power Supply • Appliances • LED Lighting Applications • Industrial AC-DC 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. UCC256302 SLUSD69 – NOVEMBER 2017 www.ti.com Table of Contents 1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Pin Configuration and Functions ......................... 3 5 Specifications......................................................... 4 5.1 Absolute Maximum Ratings ...................................... 4 5.2 ESD Ratings.............................................................. 4 5.3 Recommended Operating Conditions....................... 4 5.4 Thermal Information .................................................. 5 5.5 Electrical Characteristics........................................... 5 5.6 Switching Characteristics .......................................... 7 5.7 Typical Characteristics .............................................. 8 6 Detailed Description ............................................ 13 6.1 Overview ................................................................. 13 6.2 Functional Block Diagram ....................................... 15 6.3 Feature Description................................................. 16 6.4 Device Functional Modes........................................ 29 7 Application and Implementation ........................ 42 7.1 Application Information............................................ 42 7.2 Typical Application ................................................. 42 8 Power Supply Recommendations...................... 56 8.1 VCC Pin Capacitor.................................................. 56 8.2 Boot Capacitor ........................................................ 56 8.3 RVCC Pin Capacitor ............................................... 57 9 Layout ................................................................... 58 9.1 Layout Guidelines ..................


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