原标题：PowerIntLinkSwitch-TN2系列蓝牙墙壁开关参考设计(DER622)

　　PowerInt公司的DER622是采用LinkSwitchTM-TN2系列LNK3202D非隔离反激拓扑蓝牙墙壁开关参考设计,AC输入宽,3W到250W负载,230VAC时的待机电流小于300uA,无负载输入电流小于75uA,功耗小于15mW,主要用于照明控制.本文介绍了LinkSwitch™-TN2系列产品亮点,以及采用LinkSwitchTM-TN2系列LNK3202D非隔离反激蓝牙墙壁开关参考设计DER622主要特性和指标,电路图,变压器电路图,材料清单和PCB设计图.

　　The LinkSwitch™-TN2 family of ICs for non-isolated off-line power supplies provide dramatically improved performance compared to traditional linear or cap-dropper solutions. Designs using the highly integrated LinkSwitch-TN2 ICs are more flexible and feature increased efficiency, comprehensive system level protection and higher reliability. The device family supports buck, buck-boost and flyback converter topologies. Each device incorporates a 725 V power MOSFET, oscillator, On/Off control for highest efficiency at light load, a high-voltage switched current source for self-biasing, frequency jittering, fast (cycle-by-cycle) current limit, hysteretic thermal shutdown, and output and input overvoltage protection circuitry onto a monolithic IC.

　　LinkSwitch-TN2 devices feature improved accuracy of feedback pin regulation — ± 1.3% versus 6.6% of previous generation (LinkSwitch-TN). LinkSwitch-TN2 ICs consume very little current in standby resulting in power supply designs that meet all no-load and standby specifications worldwide. MOSFET current limit modes can be selected through the BYPASS pin capacitor value. The high current limit level provides maximum continuous output current while the low level permits using very low cost and small surface mount inductors. A full suite of protection features enable safe and reliable power supplies protecting the device and the system against input and output overvoltage faults, device over-temperature faults, lost regulation, and power supply output overload or short-circuit faults.

　　LinkSwitch™-TN2系列产品亮点:

　　Highest Performance and Design Flexibility

　　Supports buck, buck-boost and flyback topologies

　　Low component-count buck converter

　　Excellent load and line regulation

　　Selectable device current limit

　　66 kHz operation with accurate current limit

　　Allows the use of low-cost off-the-shelf inductors

　　Reduces size and cost of magnetics and output capacitor

　　Frequency jittering reduces EMI filter complexity

　　Pin-out simplifies PCB heat sinking

　　Enhanced Safety and Reliability Features

　　Output overvoltage protection (OVP)

　　Line input overvoltage protection (OVL)

　　Hysteretic over-temperature protection (OTP)

　　Extended creepage between DRAIN pin and all other pins improves field reliability

　　725 V MOSFET rating for excellent surge withstand

　　EcoSmart™– Extremely Energy Efficient

　　Standby supply current <100 μA

　　On/Off control provides constant efficiency over a wide load range

　　Easily meets all global energy efficiency regulations

　　No-load <30 mW in high-side buck converters with external bias

　　No-load <10 mW in flyback converters with external bias

　　采用LinkSwitchTM-TN2系列LNK3202D非隔离反激蓝牙墙壁开关参考设计DER622

　　This document is an engineering report describing a two-wire (no neutral) Bluetooth lowenergy(BLE) smart wall switch using LinkSwitch-TN2 LNK3202D. This demo board is

　　intended as a general purpose evaluation platform for LinkSwitch-TN2.

　　The document contains the power supply specification, schematic, bill of materials,transformer documentation, printed circuit layout, and performance data.

　　参考设计DER622主要特性:

　　Compatible with 2-wire (no neutral), home/building wiring

　　Non-isolated LNK3202D power supply with half-wave rectifier

　　Low-component count with integrated 725 V MOSFET, current-sensing, and protection

　　Wide-range AC input

　　3 W to 250 W load

　　<300 uA standby current (with 15 mW BLE load) at 230 VAC

　　<75 uA no-load input current at 230 VAC

　　<15 mW no-load input power at 230 VAC

　　图1. 参考设计DER622外形图(正面)

　　图2. 参考设计DER622外形图(背面)

　　参考设计DER622主要指标:

　　图3. 参考设计DER622电路图

　　参考设计DER622材料清单:

　　参考设计DER622机械部件材料清单:

der622.rar