NXP TEA152x低功耗30W开关电源解决方案

2011年05月23日 09:58 发布者：Liming

NXP公司的TEA152x系列STARplug是开关电源(SMPS)控制器,能直接连接到火线整流后的高压.器件采用高压EZ-HV SOI工艺和低压双极互补MOS(BiCMOS)工艺制造,集成了650V高压开关,火线工作电压从80 V到276 V,可提供的功率高达30W,有广泛的用途,包括充电器,适配器,STB,DVD,TV/监视器电源,PC外设和MCU电源等.本文介绍了TEA152x主要特性和优势,方框图,多种应用和STARbuck评估板主要特性,电路图和所用元器件.

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方框图

图2.TEA152xP(DIP8)初级检测应用电路图

STARbuck评估板

The NXP Semiconductors STARbuck demo board is a flexible, user configurable, non-isolated SMPS application intended for low power loads.

STARbuck has a universal mains input and a single positive or negative DC voltage output.This manual describes the STARbuck demo board version 1.0.

Refer to the TEA152x data sheet for details on the STARplug device and the STARplug application note AN00055 for general application information.

The STARbuck Switched Mode Power Supply (SMPS) demo board has one single non-isolated DC output voltage. The circuit is built around an NXP Semiconductors STARplug IC and the operation mode of the circuit is either buck or buck/boost.

The default configuration on the STARbuck demo Printed-Circuit Board (PCB) implements Buck mode operation and produces 5 V (DC) (100 mA maximum) on the output terminals.However, by changing the jumper settings, modifying the component values, or swapping the components, the STARbuck demo board can be adapted easily to meet specific needs with respect to the output voltage and the output current.

STARbuck评估板主要特性:

• Universal mains input

• Single DC voltage output

• Non-isolated, AC mains supply Neutral terminal connected to 0 V (GND) DC output terminal

• Produces either a positive polarity in Buck mode or a negative polarity voltage in Buck/boost mode

• No custom-made magnetic components required; uses only standard components

• User configurable output voltage range between 5 V and 36 V

• User configurable maximum output current set using resistor R3:

– TEA1520T: up to 125 mA; maximum output power < 2.5 W

– TEA1521T: up to 250 mA; maximum output power < 5 W

– TEA1522T: up to 500 mA; maximum output power < 10 W

• High efficiency (at higher output voltages only):

– TEA1520T: 12 V; 1 W; typical efficiency > 75 %

– TEA1522T: 12 V; 4 W; typical efficiency > 78 %

• Very low standby (no-load) power (at higher output voltages only):

– TEA1520T: 12 V; 1 W; typical standby power < 40 mW

– TEA1522T: 12 V; 4 W; typical standby power < 65 mW

• Overload protection

• OverTemperature Protection (OTP)

• Built-in ElectroMagnetic Interference (EMI) filter