Fairchild公司的FSB127H是滿足2013 ErP Lot 6待機功率法規的綠色模式功率開關, 在單一封裝解決方案中集成有先進的電流模式脈寬調制(PWM)和耐雪崩700V SenseFET.器件采用飛兆半導體的mWSaverTM技術，能夠大幅降低待機功耗和無負載功耗，可以幫助設計人員解決實現低于0.5W待機模式功耗的難題。主要用在PC,服務器,LCD TV和游戲控制器的輔助電源, VCR, SVR, STB, DVD和DVCD,打印機和掃描儀的SMPS,通用適配器等.本文介紹了FSB127H主要特性,方框圖, 典型反激應用電路和典型應用電路圖.
The FSB127H 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, FSB127H provides a basic platform that is well suited for the cost-effective flyback converter design with low standby power consumption.
FSB127H主要特性:
MWSaver™ Technology
? Achieve Low No-Load Power Consumption Less than 40mW at 230VAC (EMI Filter Loss Included)
? Meet 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 10ms 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
FSB127H應用:
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
圖1. FSB127H方框圖
圖2. FSB127H典型反激應用電路
圖3. FSB127H典型應用電路圖
圖4. FSB127H變壓器電路
詳情請見:
http://www.fairchildsemi.com/ds/FS/FSB127H.pdf
