UCC25630-4DDBR   UCC25630-4DDBT  PWM 与谐振控制器    有现货 可添加我们联系方式获取最优惠价格

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描述

The UCC256304 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.UCC256304 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 and is always stable with proper frequency compensation.

The UCC256304 is unique in that the controller is able to operate over a large DC input range. This is accomplished by making the input overvoltage sense threshold much larger than the input voltage start threshold. This allows the LLC to startup and enter a low power standby mode without the need to enable the PFC and enables the LLC to accommodate an extensive range of common AC inputs.

UCC256304 provides a highly 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.

特性

• 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)

• Nemko Certification for X Cap Discharge Function

• Wide DC Input Range

• Enables Wide AC Input Range

• PFC Startup Not Required For LLC Startup

• Create a Custom Design Using the UCC256304 With the WEBENCH®Power Designer

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