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          EEPW首頁(yè) > 光電顯示 > 設(shè)計(jì)應(yīng)用 > Fairchild FSEZ1317NY 6W LED照明驅(qū)動(dòng)解決方案

          Fairchild FSEZ1317NY 6W LED照明驅(qū)動(dòng)解決方案

          作者: 時(shí)間:2011-12-01 來(lái)源:網(wǎng)絡(luò) 收藏

          Fairchild公司的FSEZ1317NY是第三代初級(jí)邊調(diào)整(PSR)和高度集成PWM控制器,待機(jī)功耗低于300mW,高壓起動(dòng),具有最少的外接元件,沒有次級(jí)反饋電路的恒壓(CV)和恒流(CC)控制,PWM固定頻率50kHz,主要用在手機(jī),無(wú)繩電話,PDA,數(shù)碼相機(jī)等充電器,替代線性變壓器和RCC開關(guān)電源(SMPS).本文介紹了FSEZ1317主要特性, 功能方框圖, 簡(jiǎn)化PSR反激轉(zhuǎn)換器電路圖, 高壓起動(dòng)電路圖和6W 器主要特性,電路圖和變壓器電路圖.

          FSEZ1317: Primary-Side-Regulation PWM with POWER MOSFET Integrated

          This third-generation Primary-Side-Regulation (PSR) and highly integrated PWM controller provides several features to enhance the performance of low-power flyback converters. The proprietary topology, TRUECURRENT?, of FSEZ1317 enables precise CC regulation and simplified circuit design for batterycharger applications. A low-cost, smaller, and lighter charger results, as compared to a conventional design or a linear transformer.

          To minimize standby power consumption, the proprietary green mode 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 the FSEZ1317, a charger can be implemented with few external components and minimized cost.

          FSEZ1317主要特性:

          ? Low Standby Power Under 30mW

          ? High-Voltage Startup

          ? Fewest External Component Counts

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

          ? Green-Mode: Linearly Decreasing PWM Frequency

          ? Fixed PWM Frequency at 50kHz with Frequency Hopping to Solve EMI Problem

          ? Cable Compensation in CV Mode

          ? Peak-Current-Mode Control in CV Mode

          ? Cycle-by-Cycle Current Limiting

          ? VDD Over-Voltage Protection with Auto Restart

          ? VDD Under-Voltage Lockout (UVLO)

          ? Gate Output Maximum Voltage Clamped at 15V

          ? Fixed Over-Temperature Protection with Auto Restart

          ? Available in the 7-Lead SOP and DIP Packages

          FSEZ1317應(yīng)用:

          ? Battery chargers for cELlular phones, cordless phones, PDA, digital cameras, power tools, etc.

          ? Replaces linear transformers and RCC SMPS

          圖1. FSEZ1317功能方框圖

          圖2. FSEZ1317簡(jiǎn)化PSR反激轉(zhuǎn)換器電路圖

          圖3. FSEZ1317高壓起動(dòng)電路圖


          圖4. FSEZ1317典型應(yīng)用電路圖

          6W

          The following reference design supports inclusion of FSEZ1317NY in design of illumination.

          6W LED器主要特性:

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

          Built in 700V/1A MOSFET

          Low EMI through Frequency Hopping

          Low Power Consumption in Standby

          Protection Functions: UVLO, Over-Voltage, Over-Current, and Over-Temperature

          圖5. 6W LED照明驅(qū)動(dòng)器電路圖

          圖6. 6W LED照明驅(qū)動(dòng)器變壓器電路圖



          關(guān)鍵詞: LED 照明驅(qū)動(dòng)

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