NXP公司的TEA152x系列是低功耗系統的開關電源控制IC,采用高壓EZ-HV SOI工藝和BiCMOS工藝制造,包括高壓功率開關和直接從火線電壓整流的起動電路,通用電源功率高達30W,火線電壓從80 V到276 V,待機功耗低于100mW,主要用在充電器,適配器,STB,DVD,TV/監視器待機電源和PC外設.本文介紹了TEA152x主要特性和優勢,方框圖以及STARplug Mini演示板主要特性和多種配置電路圖與相應的元件列表.
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主要特性和優勢:
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應用:
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.
圖1.TEA152x系列框圖
圖1.TEA152xP初級檢測應用配置圖
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.
圖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.
圖2.TEA152x演示演示板外形圖
圖2.TEA152x STARplug Mini默認配置圖
圖3.TEA152x帶RCD緩沖器的STARplug Mini配置圖
圖4.TEA152x STARplug Mini初級反激配置圖
圖5.TEA152x STARplug Mini自供電配置圖
圖6.TEA152x簡化次級反饋 STARplug Mini配置圖
默認元件列表: 5V/3W 和12V/5W版本
RCD緩沖器增加元件列表:
初級反饋增加元件列表:
自供電源TEA152x增加元件列表:
簡化次級反饋增加元件列表:
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