infineon公司的IDP2303是集成了浮點高邊驅動器和600V起動單元的多模式PFC和LLC控制器，數字引擎為多模式工作提供先進算法，在整個負載范圍內支持最高的效率，主要用在75W到300W的LCD-TV以及通用的開關電源（SMPS）。本文介紹了IDP2303產品亮點和主要特性，典型應用電路圖以及采用IDP2303的120 W 24 V 3.5 A 12 V 3 A SMPS演示板主要特性與指標，電路圖，材料清單和PCB設計圖。

The IDP2303 is a multi-mode PFC and LLC controller combined with a floating high side driver and a startup cell. Adigital engine provides advanced algorithms for multi-mode operation to support highest efficiency over the whole loadrange. A comprehensive and configurable protection feature set is implemented. Only a minimum of externalcomponents are required with the low pin count DSO-16 package. The integrated HV startup cell and advanced burstmode enable to achieve low stand-by power. In addition a one-time-programming （OTP） unit is integrated to provide awide set of configurable parameters that help to ease the design in phase.

IDP2303產品亮點：

? Integrated 600V startup cell

? Integrated floating driver based on coreless transformer technology

? Digital multi-mode operation for higher efficiency curve

? Supports low stand-by power by means of direct X-cap discharge function andadvanced burst mode control

? Eliminates the auxiliary power supply by means of integrated startup cell andburst mode

? UART interface for communication and in-circuit configuration

? Flexible design-in by means of one time programming capability for a widerange of parameters

IDP2303主要特性：

? Multi-mode PFC

? Configurable PFC gate driver

? Synchronous PFC and LLC burst mode control

? Configurable non-linear LLC VCO curve

? Configurable soft-start

? VAC input voltage sensing and X cap discharge via HVPin

IDP2303應用：

? LCD-TV 75W~ 300W

? Generarl SMPS

圖1.IDP2303框圖

圖2.IDP2303典型應用電路圖

采用IDP2303的120 W 24 V 3.5 A 12 V 3 A SMPS演示板

The demo board described in this document is a 120 W SMPS using a digital PFC-LLC combi controller （the IDP2303）， which is the second generation of digital combi controller with a 16pin package developed by Infineon Technologies. The IDP2303 is specially designed for switch mode power supplies used in TV power system applications.

The IDP2303 is a highly integrated multi-mode power factor correction （PFC） and half-bridge LLC （HB LLC） controller. Multi-mode operation of the PFC controller and zero voltage switching of the LLC MOSFETs can significantly increase the power conversion efficiency， especially light load efficiency， while the system costs are minimized by the integrated high-voltage start-up cell， regulator for the PFC converter， MOSFET drivers and internal communication between the PFC and LLC controllers. The auxiliary power supply can be eliminated by the integrated high-voltage start-up cell and advanced burst mode control. With an active X-CAP discharge function， low stand-by power consumption during burst mode is supported. A comprehensive set of built-in protection features can greatly enhance the system operation and safety. Up to 40 different parameters ensure flexibility during system design and achieve optimal performance. All of these features make the IDP2303 a very competitive AC-DC controller for PFC-HB LLC resonant converter.

DPAK power MOSFETs are used in this reference design. For LED TVs， a slim SMPS board is a desire and also a challenge due to the limitations of active and passive components. Compared to FullPAK MOSFETs which are used in conventional TV SMPS design， DPAK MOSFETs have the advantage of being thinner and also easier to assemble. In this reference design， two IPD60R400CE are used in parallel for the PFC stage， and two IPD60R1K5CE are used in the LLC stage.

圖3.DEMO-IDP2303-120W PFC+LLC轉換器外形圖(正面)

圖4.DEMO-IDP2303-120W PFC+LLC轉換器外形圖(背面)

DEMO-IDP2303-120W主要指標:

圖5.DEMO-IDP2303-120W PFC+LLC轉換器電路圖

DEMO-IDP2303-120W PFC+LLC轉換器材料清單:

圖6.LLC諧振變壓器電路圖

圖7.DEMO-IDP2303-120W PFC+LLC轉換器 PCB元件分布圖(正面)

圖8.DEMO-IDP2303-120W PFC+LLC轉換器 PCB元件分布圖(背面)