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Fairchild公司的FAN104W是高频低级调解的PWM控制器,能提高低功率反激转换器的性能.待机功耗小于30mW,满意能量之星五星尺度,突发模式工作电流600uA,具有输出短路掩护,输出过压掩护(VSOVP),VDD过压掩护和超温掩护等功能,主要用在智能手机,PAD,PDA和数码相机电池充电器等.本京电港论坛文章先容了FAN104W主要特点,方框架图,典范应用电路以及10W平板电脑和智能手机充电器参考方案主要特点,电路原理图纸,变压器电路和PCB线路板结构图. This highly integrated PWM controller, FAN104W, provides several features to enhance the performance of low-power flyback converters. The proprietary topology of FAN104W enables simplified circuit design for battery charger applications. The result is a lowercost,smaller, and lighter charger compared to a conventional design or a linear transformer.To minimize standby power consumption, a proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. Green Mode assists the power supply in meeting power conservation requirements. By using FAN104W, a charger can be implemented with few external components and minimized cost. FAN104W主要特点: Achieves <30 mW; Energy Star’s 5-Star Level Proprietary 500 V High-Voltage JFET Startup Reduces Startup Resistor Loss Low Operation Current in Burst Mode: 600 μA Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry Green Mode: PWM Frequency Linearly-Decreasing PWM Frequency at 85 kHz with Frequency Hopping to Solve EMI Problem Boundary-Conduction-Mode (BCM) Operation at Lower AC Input Voltage Cable Compensation in CV Mode Cycle-by-Cycle Current Limiting Gate Output Maximum Voltage Clamped at 14 V VDD Under-Voltage Lockout (UVLO) Available Built-in Protections: - Output Short-Circuit Protection - Output Over-Voltage-Protection (VSOVP) with Latch Mode - VDD Over-Voltage-Protection (VDD OVP) - CS Pin Single-Fault Protection - VS Pin single-Fault Protection - Over-Temperature-Protection (OTP) with Latch Mode SOIC Package FAN104W应用: Battery chargers for smart phones, Pad, PDA,digital cameras. Best choice to replace linear transformer and RCC SMPS 10W平板电脑和智能手机充电器参考方案 This reference design supports inclusion of the FAN104W in the design of a 10W charger with BCM operation and Primary-Side Regulation (PSR) technology. It should be used in conjunction with the FAN104W datasheet as well as Fairchild’s application notes and technical support team. 10W充电器参考方案主要特点: Low Standby-Power Consumption: < 50mW at 264VAC Constant-Voltage (CV) and Constant-Current (CC) Control without Secondary-Feedback Circuitry PWM Frequency at 85kHz with Frequency Hopping to Reduce EMI Frequency-Reduction Technology for BCM Operation Cable-Voltage-Drop Compensation in CV Mode High-Voltage Startup Low Burst-Mode Operating Current: 600?A(Typical) and Normally-Operating Current: 3.5mA (Typical) Output Over-Voltage Protection (OVP), VDD Over-Voltage Protection (OVP),VDD Under-Voltage Lockout (UVLO), Over-Temperature Protection (OTP),CS-Pin- Short Protection, VS-Pin Single-Fault Protection SOIC-8 Package
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