原标题：Fairchild FSB127H 16W ATX待机电源解决方案

　　Fairchild公司的FSB1x7H系列是满足2013 ErP Lot 6待机功率法规的绿色模式功率开关, 在单一封装解决方案中集成有先进的电流模式脉宽调制(PWM)和耐雪崩700V SenseFET.器件采用飞兆半导体的mWSaverTM技术，能够大幅降低待机功耗和无负载功耗，可以帮助设计人员解决实现低于0.5W待机模式功耗的难题。主要用在PC,服务器,LCD TV和游戏控制器的辅助电源, VCR, SVR, STB, DVD和DVCD,打印机和扫描仪的SMPS,通用适配器等.本文介绍了FSB117H / FSB127H / FSB147H主要特性,方框图, FSB117H典型应用电路图以及FEBFSB127H_T001评估板主要特性,电路图,材料清单和PCB布局图.

　　The FSB-series is a next-generation, green-mode Fairchild Power Switch (FPS™) incorporating Fairchild’s innovative mWSaver™ technology, which dramatically reduces standby and no-load power consumption, enabling conformance to all worldwide Standby Mode efficiency guidelines. It integrates an advanced currentmode pulse width modulator (PWM) and an avalancherugged 700V SenseFET in a single package, allowing auxiliary power designs with higher standby energy efficiency, reduced size, improved reliability, and lower system cost than previous solutions.

　　Fairchild Semiconductor’s mWSaver™ technology offers best-in-class minimum no-load and light-load power consumption. An innovative Ax-CAP™ method, one of the five proprietary mWSaver™ technologies, minimizes losses in the EMI filter stage by eliminating the X-cap discharge resistors while still meeting IEC61010-1 safety requirement. mWSaver™ Green Mode gradually decreases switching frequency as load decreases to minimize switching losses.

　　A new proprietary asynchronous jitter decreases EMI emission and built-in synchronized slope compensation allows stable peak-current-mode control over a wide range of input voltage. The proprietary internal line compensation ensures constant output power limit over entire universal line voltage range.

　　Requiring a minimum number of external components, the FSB-series provides a basic platform that is well suited for the cost-effective flyback converter design with low standby power consumption.

　　FSB117H / FSB127H / FSB147H主要特性:

　　mWSaver™ Technology

　　 Achieve Low No-Load Power Consumption Less than 40mW at 230VAC (EMI Filter Loss Included)

　　 Meets 2013 ErP Standby Power Regulation (Less than 0.5W Consumption with 0.25W Load) for ATX Power and LCD TV Power

　　 Eliminate X-Cap Discharge Resistor Loss with Ax-CAP™ Technology

　　 Linearly Decreased Switching Frequency at Light- Load Condition and Advanced Burst Mode Operation at No-Load Condition

　　 700V High-Voltage JFET Startup Circuit to Eliminate the Startup Resistor Loss

　　Highly Integrated with Rich Features

　　 Internal Avalanche-Rugged 700V SenseFET

　　 Built-in 5ms Soft-Start

　　 Peak-Current-Mode Control

　　 Cycle-by-Cycle Current Limiting

　　 Leading-Edge Blanking (LEB)

　　 Synchronized Slope Compensation

　　 Proprietary Asynchronous Jitter to Reduce EMI

　　Advanced Protection

　　 Internal Overload / Open-Loop Protection (OLP)

　　 VDD Under-Voltage Lockout (UVLO)

　　 VDD Over-Voltage Protection (OVP)

　　 Constant Power Limit (Full AC Input Range)

　　 Internal Auto Restart Circuit (OLP, VDD OVP, OTP)

　　 Internal OTP Sensor with Hysteresis

　　 Adjustable Peak Current Limit

　　FSB117H / FSB127H / FSB147H应用:

　　General-purpose switched-mode power supplies and flyback power converters, including:

　　 Auxiliary Power Supply for PC, Server, LCD TV, and Game Console

　　 SMPS for VCR, SVR, STB, DVD, and DVCD Player, Printer, Facsimile, and Scanner General Adapter

　　 LCD Monitor Power / Open-Frame SMPS

　　图1.FSB117H / FSB127H / FSB147H方框图

　　图2.FSB117H典型应用电路图

　　FEBFSB127H_T001评估板

　　This user guide supports the 16W evaluation board for ATX standby using FSB127H. It should be used in conjunction with the FSB127H datasheet as well as Fairchild’sapplication notes and technical support team.

　　The highly integrated FSB-series consists of an integrated Current Mode Pulse Width Modulator (PWM) and an avalanche-rugged 700V SenseFET. It is specifically designed for high-performance offline Switch Mode Power Supplies (SMPS) with minimal external components.

　　Compared with a discrete MOSFET and controller or RCC switching converter solution, the FSB-series reduces total component count, design size, and weight while increasing efficiency, productivity, and system reliability. These devices provide a basic platform for the design of cost-effective flyback converters, as in PC auxiliary power supplies.

　　图3. FEBFSB127H_T001评估板外形图

　　FEBFSB127H_T001评估板配置:

　　 Input Voltage: 90VAC – 264VAC

　　 Output Voltage: 5V

　　 Output Current: 0 – 3.2A

　　 Operation Frequency: 100kHz

　　FEBFSB127H_T001评估板材料清单:

　　图6.变压器指标

　　变压器绕组指标: