POWER INTEGRATIONS LinkSwitch-LP Product Series High Efficiency Offline Switching IC for Linear Transformer Replacement User Manual

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Link Switch-LP 产品系列

替代线性变压器的高效率离线式开关IC

• PI Xls给出了所有用于变压器T1绕制所需的参数。 • 此设计使用两个“标准”变压器（见AN-39）中的一个。使 用该变压器，选择合适的R1电阻，电源输出可以在4 V到 2006年2月 7.5 V间加以调节。 • 图1中包含三个可选元件：RF1、VR1及C4。如果在安规申请

开环时输出电压如果不可接受，仅使用一个1/2 W的VR1做输 DC Output AC

出过压保护就可以了。 • 当输出高于峰值功率点时，由于IC限制了电源的输出电流，当 负载继续增加时FB引脚的电压必须从1.69 V开始降低。因此， AC Input Voltage (VAC)

选取R1时，要保证FB引脚电压在峰值功率点处为1.69 V。 Link Switch-LP

图3. 输入电压变化时的空载输入功率 BP

PI-3923-092705

90 VDC 115 VDC

230 VDC VO

90 VDC 典型应用：

265 VDC 115 VDC

Rated Output Power = VR • IR

Min Limit 230 VDC • 手机或无绳电话、PDA、电动工具、MP3或便携式音频设备、

Max Limit 265 VDC VR

• 外围元件数目最少的开关器件 PI-3924-011706

Average Output Current (A) Output Power (W)

• 初级侧的控制省去了光耦器及相关元件 • 严格的IC参数容差及专利的变压器绕制技术可以实

图2. 负载及输入电压变化时的输出VI特性曲线 图4. 输出功率及输入电压变化时的效率

现无箝位(Clampless™)的设计 — 降低了元件数目

230 VAC ±15% 85-265 VAC

更多最新信息，请浏览www.powerint.com Power Integrations reserves the right to make changes to its products at any time to improve reliability or manufacturability. Power Integrations does not assume any liability arising from the use of any device or circuit described

性能&优势 LNK562P或G 1.9 W 1.9 W 1.9 W 1.9 W

herein. POWER INTEGRATIONS MAKES NO WARRANTY HEREIN AND SPECIFICALLY DISCLAIMS ALL WARRANTIES INCLUDING, WITHOUT LIMITATIONS, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND NON-INFRINGEMENT OF THIRD PARTY RIGHTS. The products and applications illustrated herein (transformer construction and circuits external to the LNK563P或G 2.5 W 2.5 W 2.5 W 2.5 W products) may be covered by one or more U.S. and foreign patents or potentially by pending U.S. and foreign patent applications assigned to Power Integrations. A complete list of Power

最低的系统成本以及先进的安全特性 LNK564P或G 3 W 3 W 3 W 3 W

Integrations' patents may be found at www.powerint.com. Power Integrations grants its customers a license under certain patent rights as set forth at http://www.powerint.com/ip.htm. The PI logo, TOPSwitch, Tiny Switch, Link Switch, DPA-Switch, Eco Smart, PI Expert, E-Shield, Filterfuse, Clampless and PI FACTS are trademarks of Power Integrations, Inc. Other 参考数据手册中的其它注释及条件。 trademarks are property of their respective companies. Copyright 2005, Power Integrations, Inc.

P = DIP-8 G = SMD-8

印度 • 频率调制技术极大地改善了EMI，降低了滤波器的成本

Phone: +1 408-414-9660 Shanghai, China Bangalore, India Seoul, Korea UNITED KINGDOM

• 无论在PCB板上还是在封装上都保证高压漏极与其它所有

Fax: +1 408-414-9760 Phone: +86-21-6215-5548 Phone: +91-80-4113-8020 Phone: +82-2-2016-6610 Phone: +44 (0) 1252-730-140 E-mail: [email protected] Fax: +91-80-4113-8023 E-mail: [email protected] E-mail: [email protected]

E-mail: [email protected]

Eco Smart® — 极高效率

客户服务 中国(深圳) 意大利 新加坡 Phone: +1 408-414-9665 Shenzhen, China Via De Amicis 2 Singapore 优于线性变压器及RCC的出色性能 Fax: +1 408-414-9765 Phone: +86-755-8379-3243 20091 Bresso MI - Italy Phone: +65-6358-2160 • 无需增加任何元件，轻松达到全球所有的节能标准 E-mail: [email protected] Phone: +39-028-928-6000 E-mail: [email protected]

E-mail: [email protected] • 迟滞热关断保护 — 自动恢复的特性提高了应用的可靠性 • 在265 VAC输入时的空载能耗<150 m W

San Jose, CA, USA Munich, Germany Kanagawa, Japan Taipei, Taiwan Phone: +1 408-414-9200 Phone: +49-89-5527-3910 Phone: +81-45-471-1021 Phone: +886-2-2659-4570 • 自动重启动功能在短路及开环故障状况下提供保护

E-mail: [email protected] E-mail: [email protected] E-mail: [email protected] E-mail: [email protected]

• 简单的开／关控制，无需环路补偿 CEC标准的理想选择

全球范围销售代表处及分销商请浏览我们的网站www.powerint.com

www.powerint.com www.powerint.com February 2006