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基于PowerInt公司的LNK4023D 10W USB充电器参考设计

来源: 中电网
2019-03-15
类别:消费电子
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文章创建人 拍明芯城

原标题:PowerInt LNK4023D 10W USB充电器参考设计

  PowerInt公司的LinkSwitchTM-4系列产品是恒压/恒流初级侧调节(PSR)开关IC,由于不需要光耦合器和此级控制电路从而大大地简化了低功耗CV/CC充电器的设计.器件采用PW/PFM控制器是效率最大化,满足无负载时功耗小于30W的要求,主要用于手机/无绳电话充电器,PDA,MP3/手持音频设备充电器和适配器等.本文介绍了LinkSwitchTM-4系列产品亮点,功能框图, 通用输入10W充电器电路图以及采用LinkSwitchTM-4 LNK4023D 10W CV/CC USB充电器参考设计(RDR-462)主要指标,电路图,材料清单和PCB设计图.

  The LinkSwitchTM-4 family of ICs dramatically simplifies low power CV/CC charger design by eliminating an optocoupler and secondary control circuitry. The LinkSwitch-4 family adaptive BJT drive technology uses combined base and emitter switching to boost switching performance and deliver higher efficiency, wider Reverse Bias Safe Operating Area (RBSOA) margin and the flexibility to accommodate a wide range of low cost BJT. The device incorporates a multimode PWM/PFM controller with quasi resonant switch to maximize the efficiency, meet <30 mW no-load and at same time maintain fast transient response greater than 4.3 V with a load change from 0% to 100%.

  LinkSwitchTM-4系列产品亮点:

  Dramatically Simplifies CV/CC Converters

  Eliminates optocoupler and all secondary CV/CC control circuitry

  Eliminates all control loop compensation circuitry

  Advanced Performance Features

  Dynamic base drive technology provides flexibility in choice of BJT transistor by dynamically optimizing BJT switching characteristics Extends RBSOA of BJT

  Dramatically reduces sensitivity to BJT gain

  Compensates for transformer inductance tolerances

  Compensates for input line voltage variations

  Compensates for cable voltage drop

  Compensates for external component temperature variations

  Very accurate IC parameter tolerances using proprietary trimming technology

  Frequency up to 65 kHz to reduce transformer size

  The minimum peak current is fixed to improve transient load response

  Advanced Protection/Safety Features

  Single fault output overvoltage and short-circuit

  EcoSmart™– Energy Efficient

  Meets DoE 6 and CoC V5 2016 via an optimized quasi-resonant switching PWM/PFM control

  No-load consumption of <30 mW at 230 VAC input

  Green Package

  Halogen free and RoHS compliant package

  LinkSwitchTM-4系列应用:

  Chargers for cell/cordless phones, PDAs, MP3/portable audio devices, adapters, etc.

  图1. LinkSwitchTM-4系列LNK40x2S功能框图

  图2. LinkSwitchTM-4系列LNK40x3D功能框图

  图3. LinkSwitchTM-4系列典型通用输入10W充电器电路图

  采用LinkSwitchTM-4 LNK4023D 10W CV/CC USB充电器参考设计(RDR-462)

  This document is an engineering report describing a 2 A, 5.0 V USB charger utilizing a device from the LinkSwitch-4 family of ICs. This design is intended to show the high power density and efficiency that is possible due to the high level of integration while still providing exceptional performance.

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

  10W CV/CC USB充电器参考设计(RDR-462)主要特性:

   LinkSwitch-4

   Primary side regulated (no optocoupler)

   ±3% CV, ±5% CC regulation

   Transient response independent of load timing

   <30 mW no-load input power

   Cable voltage drop compensation

  图4. 10W CV/CC USB充电器参考设计(RDR-462)外形图(顶视)

  图5. 10W CV/CC USB充电器参考设计(RDR-462)外形图(底视)

  10W CV/CC USB充电器参考设计(RDR-462)主要指标:

  图6. 10W CV/CC USB充电器参考设计(RDR-462)电路图

  10W CV/CC USB充电器参考设计(RDR-462)材料清单:

  图7. 10W CV/CC USB充电器参考设计(RDR-462)PCB设计图(1)

  图8. 10W CV/CC USB充电器参考设计(RDR-462)PCB设计图(2)

  图9. 10W CV/CC USB充电器参考设计(RDR-462)变压器电路图


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标签: PowerInt USB 充电器

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