Fairchild FSEZ1016A高度集成PWM电源控制方案

Fairchild 公司的FSEZ1016A是高度集成PWM控制器,能使小功率反激转换器增加性能,简化电路设计,特别是电池充电器的应用. FSEZ1016A的起动电流仅为10uA,允许使用高的起动电阻,从而进一步降低了功耗.工作电流为3.5mA,主要用在手机,无绳电话,PDA,数码相机的电池充电器,以及替代线性变压器和RCC开关电源.本文介绍了FSEZ1016A主要特性,方框图, 典型应用以及5W (5V/1A)应用电路图和所用材料清单.

FSEZ1016A: Primary-Side-Regulation PWM Integrated Power MOSFET

This highly integrated PWM controller provides features to enhance the performance of low-power flyback converters. The proprietary topology of FSEZ1016A enables simplified circuit design, especially for batterycharger applications. A low-cost, smaller, and lighter charger is the result when compared to a conventional design or a linear transformer. The startup current is only 10μA, which allows large startup resistance for further power saving.

To minimize the standby power consumption, the proprietary green-mode function provides off-time modulation to linearly decrease PWM frequency under light-load conditions. This green mode assists the power supply in meeting power conservation requirements.

By using FSEZ1016A, a charger can be implemented with fewer external components and minimized cost. FSEZ1016A-series controller is available in the 7-pin SOIC package.

FSEZ1016A主要特性:

Constant-Voltage (CV) and Constant-Current (CC) Control Without Secondary-Feedback Circuitry

Accurate Constant Current Achieved by Fairchild’s Proprietary TRUECURRENTTM Technique

Green-Mode Function: PWM Frequency Linearly Decreasing

Fixed PWM Frequency at 42KHz with Frequency Hopping to Solve EMI Problems

Cable Compensation in CV Mode

Low Startup Current: 10μA

Low Operating Current: 3.5mA

Peak-Current-Mode Control in CV Mode

Cycle-by-Cycle Current Limiting

VDD Over-Voltage Protection (OVP) with Auto-Restart

VDD Under-Voltage Lockout (UVLO)

Fixed Over-Temperature Protection (OTP) with Latch

SOIC-7 Package Available

FSEZ1016A 应用:

Battery Chargers for Cellular Phones, Cordless Phones, PDA, Digital Cameras, Power Tools

Best Choice to Replace Linear Transformer and RCC SMPS



图1.FSEZ1016A内部方框图



图2.FSEZ1016A典型应用



图3.采用FSEZ1016A的 5W (5V/1A)应用电路图

5W (5V/1A)应用电路图材料清单(BOM):



初级边调整(PSR) PWM控制器和EZ-Switch FAN100 / FAN102 / FSEZ1016A / FSEZ1216的设计和应用

Design and Application of Primary-Side Regulation (PSR) PWM Controller and EZ-Switch FAN100 / FAN102 / FSEZ1016A / FSEZ1216



图4.FSEZ1016A (FAN100 + MOSFET)应用电路



图5. FSEZ1016A (FAN100 + MOSFET) (5V/1A)应用电路

(5V/1A)应用电路材料清单: