TEA152x STARplug Mini开关电源解决方案

2011年08月24日 12:41 发布者：1770309616

NXP公司的TEA152x系列是低功耗系统的开关电源控制IC,采用高压EZ-HV SOI工艺和BiCMOS工艺制造,包括高压功率开关和直接从火线电压整流的起动电路,通用电源功率高达30W,火线电压从80 V到276 V,待机功耗低于100mW,主要用在充电器,适配器,STB,DVD,TV/监视器待机电源和PC外设.本文介绍了TEA152x主要特性和优势,方框图以及STARplug Mini演示板主要特性和多种配置电路图与相应的元件列表.

TEA152x:SMPS ICs for low-power systems

The TEA152x family STARplug is a Switched Mode Power Supply (SMPS) controller IC that operates directly from the rectified universal mains. It is implemented in the high-voltage EZ-HV SOI process, combined with a low-voltage Bipolar Complementary Metal-Oxide Semiconductor (BiCMOS) process. The device includes a high-voltage power switch and a circuit for start-up directly from the rectified mains voltage.A dedicated circuit for valley switching is built in, which makes a very efficient slim-line electronic power-plug concept possible.

In its most basic version of application, the TEA152x family acts as a voltage source.Here, no additional secondary electronics are required. A combined voltage and current source can be realized with minimum costs for external components. Implementation of the TEA152x family renders an efficient and low cost power supply system.

TEA152x主要特性和优势:

􀂄 Designed for general purpose supplies up to 30 W

􀂄 Integrated power switch:

􀂋 TEA1520x: 48 Ω; 650 V

􀂋 TEA1521x: 24 Ω; 650 V

􀂋 TEA1522x: 12 Ω; 650 V

􀂋 TEA1523P: 6.5 Ω; 650 V

􀂄 Operates from universal AC mains supplies (80 V to 276 V)

􀂄 Adjustable frequency for flexible design

􀂄 RC oscillator for load insensitive regulation loop constant

􀂄 Valley switching for minimum switch-on loss

􀂄 Frequency reduction at low power output makes low standby power possible (< 100 mW)

􀂄 Adjustable overcurrent protection

􀂄 Undervoltage protection

􀂄 Temperature protection

􀂄 Short-circuit winding protection

􀂄 Simple application with both primary and secondary (opto) feedback

􀂄 Available in DIP8 and SO14 packages

TEA152x应用:

􀂄 Chargers

􀂄 Adapters

􀂄 Set-Top Box (STB)

􀂄 DVD

􀂄 CD(R)

􀂄 TV/monitor standby supplies

􀂄 PC peripherals

􀂄 Microcontroller supplies in home applications and small portable equipment, etc.

图1.TEA152x系列框图

图1.TEA152xP初级检测应用配置图

STARplug Mini演示板

The STARplug Mini Switched Mode Power Supply (SMPS) demo board comes in two versions: a 5 V version and 12 V version. The circuit implemented on this board is typically suited to low-power adapter applications.

The board has a universal mains input. The total nominal output power is rated at 3 W for the 5 V version and 5 W for the 12 V version. The flyback circuit is built around the NXP Semiconductors TEA1521T or TEA1522T STARplug IC. The STARplug Mini demo board allows customization of the input filtering, snubber circuit, regulation feedback scheme etc. Small changes in output voltage (up to 20 %) are also supported. If an alternative transformer is considered, the Printed-Circuit Board (PCB) can generate virtually any output voltage. These features make the STARplug Mini demo board a highly versatile and reliable starting point for developing custom low-power boards.

This versatility comes at the cost of PCB space, so the board is not a showcase for minimal PCB space usage and cannot be looked upon as an end-solution. However, it is very useful for exploring the STARplug family of IC’s features and functionality during development of a low-power SMPS final solution.

图1. STARplug Mini演示板主要特性:

• Universal mains input

• Isolated output

• 5 V/3 W and 12 V/5 W version available as default configurations

• Stable regulated voltage

• Highly flexible and easily tuned to meet user requirements

• Used with the TEA1520T, TEA1521T and TEA1522T devices (SO14 package)

• Highly efficient: 5 V version > 68 %, 12 V version > 79 %

• Low standby (no-load) power: < 80 mW

• OverPower Protection (OPP)

• OverTemperature Protection (OTP)

• Built-in basic differential mode ElectroMagnetic Interference (EMI) filter.