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