Details, datasheet, quote on part number: UCC25630-3DDBR
PartUCC25630-3DDBR
CategorySemiconductors => Power Management => Offline and Isolated DC/DC Controllers and Converters => PWM and Resonant Controller
Part familyUCC256303 LLC Resonant Controller Enabling Low Standby Power
TitleSwitching Controllers LLC Resonant
DescriptionLLC Resonant Controller Enabling Low Standby Power 14-SOIC -40 to 125
CompanyTexas Instruments Inc.
StatusACTIVE
ROHSY
SampleNo
DatasheetDownload UCC25630-3DDBR datasheet
Specifications 
Frequency(Max)(kHz)1000
RatingCatalog
Operating Temperature Range(C)-40 to 125
TopologyHalf-Bridge,Resonant LLC
Duty Cycle(Max)(%)50
Package GroupSOIC
FeaturesLight Load Efficiency,Low Power,Soft Start,Soft Switching,Thermal Shutdown
Approx. Price (US$)0.90 | 1ku
Frequency(Min)(kHz)35
Gate Drive(Typ)(A)0.6
Vin(Max)(V)600
Control MethodCurrent
  Mecanical Data
Pin nbPackage typeInd stdJEDEC codePackage qtyCarrierDevice markWidth (mm)Length (mm)Thick (mm)Pitch (mm)
14DDBSOICR-PDCC-L2500SMALL T&RUCC256303 3.991.751.75
Application notes
• Why is transient response important and how we are improving it?
Transient response is a key performance metric in power converter design which describes how a converter responds to a sudden change in load current. This metric is important to satisfy voltage regulation requirements for dynamic loading conditions and typ | Doc
• UCC25630x Practical Design Guidelines | Doc
Evaluation Kits
UCC25630-1EVM-291: UCC256301 LLC Evaluation Module

Others parts numbering
UCC25630-1EVM-291: Power Management IC Development Tools UCC256301 LLC Evaluation Module
UCC25630-3DDBT: Switching Controllers LLC Resonant Controller

 

Features, Applications

UCC256303 LLC Resonant Controller Enabling Ultra-Low Standby Power

The is a fully featured LLC controller with integrated high-voltage gate driver. It has been designed to pair with a PFC stage 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, and with PFC stage running all the time. UCC256303 includes a range of features designed to make LLC converter operation well controlled and robust. This device aims to unburden the LLC designer and allow mainstream applications to benefit from efficiency advantages of the LLC topology. UCC256303 uses hybrid hysteretic control to provide best in class line and load transient response. The control effort is approximately linearly proportional to average input current in one cycle. The control makes the open loop transfer function a first order system so that it's very easy to compensate. The system is always stable with proper frequency compensation. UCC256303 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. Device Information(1)

PART NUMBER UCC256303 PACKAGE SOIC (14) BODY SIZE (NOM) 3.9 mm

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) LLC Resonant Controller in SOIC16 with High Voltage Clearance External Bias Required Create a Custom Design Using the UCC256303 With the WEBENCH® Power Designer

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(1) For all available packages, see the orderable addendum at the end of the data sheet.

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.

Features.................................................................. Applications........................................................... Description............................................................. Revision History..................................................... Pin Configuration and Functions......................... Specifications.........................................................

Absolute Maximum Ratings...................................... ESD Ratings.............................................................. Recommended Operating Conditions....................... Thermal Information.................................................. Electrical Characteristics........................................... Switching Characteristics.......................................... Typical Characteristics.............................................. Overview................................................................. Functional Block Diagram....................................... Feature Description................................................. Device Functional Modes........................................

Device Support...................................................... Documentation Support (if applicable).................. Receiving Notification of Documentation Updates Community Resources.......................................... Trademarks........................................................... Electrostatic Discharge Caution............................ Glossary................................................................

NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
DATE September 2017 REVISION * NOTES Initial release.
Submit Documentation Feedback Product Folder Links: UCC256303

PIN NAME BLK NO. 4 I/O DESCRIPTION This pin is used to sense the PFC output voltage level. A resistive divider should be used to attenuate the signal before it is applied to this pin. The voltage level on this pin will determine when the LLC converter start/stops switching. The sensed BLK voltage is also used to adjust the burst mode threshold to improve efficiency over the input voltage range. This pin is used to sense the output voltage through the bias winding. The sensed voltage is used for output over voltage protection. LLC stage control feedback input. The amount of current sourced from this pin will determine the LLC input power level. Ground reference for all signals. High-side gate-drive floating supply voltage. The bootstrap capacitor is connected between this pin and pin HS. A high voltage, high speed diode should be connected from RVCC to this pin to supply power to the upper MOSFET driver during the period when the lower MOSFET is conducting. High-side floating gate-drive output. High-side gate-drive floating ground. Current return for the high-side gate-drive current. Connect to GND Resonant current sense. The resonant capacitor voltage is differentiated with a first order filter to measure the resonant current The capacitance value connected from this pin to ground will define the duration of the softstart period. This pin is also used to program the burst mode threshold; the resistor divider on this pin programs the burst mode threshold and the threshold scaling factor with BLK pin voltage. Low-side gate-drive output. Functional creepage and clearance Functional creepage and clearance Regulated 12-V supply. This pin is used to supply the gate driver and PFC controller. Supply input. Resonant capacitor voltage sense


 

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