原标题：Infineon XDPL8221数字PFC+反激控制器100W电源解决方案

　　Infineon公司的XDPL8221是属于XDPTM数字功率系列产品,提供单独的PFC激励和反激两级控制,以得到包括有恒压(CV),恒流(CC)和有限功率(LP)组合的输出,用于LED照明.器件的数字引擎提供了可配置的工作参数和保护模式.这就方便了相位设计,降低了硬件原型的数量而得到了更多产品种类.精确的初级边输出电压和电流控制而省去了次级边反馈回路.UART接口控制驱动器输出和读操作状态,无闪烁输出调光,模拟驱动电流降低到1%,两级设计消除了输出的AC波纹,支持通用的AC和DC输入电压(90 V rms - 305 V rms),效率高达90%,总谐波失真(THD)小于15%,正常负载是可低至30%,集成的600V高压起动单元保证了不快速时间去点亮LED(< 250 ms),可配置自适应温度保护,并具有多种保护特别性,主要用在LED照明的AC/DC LED驱动器.本文介绍了XDPL8221主要特性,简化功能框图,典型应用电路以及参考设计REF-XDPL8221-U100W主要特性和电指标,各分部主要特性,以及电路图,材料清单和PCB设计图.

　　The XDPL8221 digital controller IC belongs to the Infineon XDPTM digital power family. It provides an independent PFC boost and flyback dual-stage control to achieve an output that combines Constant Voltage (CV), Constant Current (CC) and Limited Power (LP) for LED luminaires. The IC is available in a PG-DSO-16 package and supports many features with only a minimal requirement of external components. The digital engine of the IC offers the possibility to configure operational parameters and protection modes. This eases the design phase and enables great product variety with a reduced number of hardware variants. Accurate primary-side output voltage and current control eliminates a secondary-side feedback loop.

　　This design guide provides detailed information on how to calculate the major power stage component values, as well as the setting of parameters for general functions and protection features. Useful tips on PCB layout are included to help customers optimize their PCB design. Finally, the installation and use of a Graphical User Interface (GUI) – .dp Vision – is described to guide the customer to set parameters for the digital IC. The numeric values below are shown for the 100 W reference board with universal input voltage.

　　XDPL8221 is a digital dual-stage PFC and FB controller IC supporting PWM dimming functionality. Both stagesuse configurable multi-mode operation to select the best mode of operation for every operation condition.

　　Multi-mode operation automatically switches between QRM, DCM and ABM (only for FB)

　　XDPL8221 features a comprehensive set of configurable protection modes to detect fault conditions.

　　XDPL8221 provides a high degree of flexibility in design-in of the application. A Graphic User Interface (GUI)tool supports users in the configuration of the operational and protection parameters.

　　XDPL8221主要特性:

　　• UART interface to control driver output and reading operating status

　　• Flicker-free output dimming by analog reduction of driving current down to 1%

　　• Integrated two stage digital controller allows a reduced number of external parts, optimizes Bill ofMaterials (BOM) and form factor.

　　• Two-stage design eliminates AC ripple on output.

　　• Supports universal AC and DC input voltage (90 V rms to 305 V rms) nominal.

　　• High efficiency up to 90%

　　• Multi-control output (Constant Current (CC)/Constant Voltage (CV)/Limited Power (LP))

　　• Performance and protection related driver parameters are configurable via UART interface allowing fordesign flexibility and optimization.

　　• Low harmonic distortion (Total Harmonic Distortion (THD) < 15%) down to 30% nominal load

　　• Integrated 600V high voltage start-up cell ensures fast time to light (< 250 ms)

　　• Configurable Adaptive Temperature Protection

　　• Automatic switching of the Power Factor Correction (PFC) between Quasi-Resonant Mode (QRM) andDiscontinuous Conduction Mode (DCM)

　　• Automatic switching of the Flyback (FB) between QRM, DCM and Active Burst Mode (ABM)

　　• Pulse Width Modulation (PWM) dimming input

　　For safe operation, the XDPL8221 contains a comprehensive set of protection features with configurablereaction like auto-restart or latch:

　　• Output over-voltage protection (open load)

　　• Output under-voltage protection (output short)

　　• VCC over- and under-voltage lockout

　　• Input over- and under-voltage protection

　　• Bus over- and under-voltage protection

　　• Over-current protection for both PFC and FB stages

　　XDPL8221应用:

　　• AC/DC LED Drivers for Light Emitting Diode (LED) luminaires

　　图1.XDPL8221简化功能框图

　　图2.XDPL8221典型应用电路

　　参考设计REF-XDPL8221-U100W

　　The XDPL8221 digital controller IC belongs to the Infineon XDPTM digital power family. It provides an independent PFC boost and flyback dual-stage control to achieve an output that combines Constant Voltage (CV), Constant Current (CC) and Limited Power (LP) for LED luminaires. The IC is available in a PG-DSO-16 package and supports many features with only a minimal requirement of external components. The digital engine of the IC offers the possibility to configure operational parameters and protection modes. This eases the design phase and enables great product variety with a reduced number of hardware variants. Accurate primary-side output voltage and current control eliminates a secondary-side feedback loop.

　　This design guide provides detailed information on how to calculate the major power stage component values, as well as the setting of parameters for general functions and protection features. Useful tips on PCB layout are included to help customers optimize their PCB design. Finally, the installation and use of a Graphical User Interface (GUI) – .dp Vision – is described to guide the customer to set parameters for the digital IC. The numeric values below are shown for the 100 W reference board with universal input voltage.

　　参考设计REF-XDPL8221-U100W产品亮点:

　　• UART command interface enables real-time communication for smart control applications

　　• Flicker-free dimming by analog reduction of output driving current down to 1 percent

　　• Primary-Side Regulated (PSR) CV, CC, LP output

　　• High current accuracy output of typically +/-2 percent across universal AC-DC input voltage range (90 Vrms to 305 Vrms) with extended output voltage range from 16 V DC to 48 V DC

　　• Multi-mode flyback stage control (QRM + DCM + ABM) ensures high power efficiency over the entire load range and low dimming output down to 1 percent of the full current

　　• High Power Factor (PF, greater than 0.9) and low input current Total Harmonic Distortion (iTHD, less than 15 percent) for AC and DC input up to 300 VRMS and load down to 30 percent

　　• Integrated 600 V start-up cell ensures fast time to light and low power consumption

　　• Adapted external temperature protection

　　参考设计REF-XDPL8221-U100W主要特性:

　　• Universal AC input (120 V to 277 V AC +/-10 percent) or DC input (120 V to 430 V DC +/-10 percent)

　　• Extended output voltage range from 16 V to 48 V DC

　　• Recommended power range from 25 W to 150 W

　　参考设计REF-XDPL8221-U100W目标应用:

　　• Driver for LED luminaires

　　图3.参考设计REF-XDPL8221-U100W外形图

　　参考设计REF-XDPL8221-U100W系统指标:

　　系统保护特性:

　　系统分部主要特性:

　　硬件设计特性:

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　　图5.参考设计REF-XDPL8221-U100W反激变压器750317672 rev00指标图

　　图6.参考设计REF-XDPL8221-U100W PFC扼流圈750343236 rev00指标图

　　参考设计REF-XDPL8221-U100W材料清单: