NXP TEA1713 150W 一体化PC适配器解决方案 - 全文

关键词： NXP , TEA1713 , 适配器 , 一体化PC

NXP 公司的TEA1713集成了PFC控制器和半桥谐振转换器（HBC），通用火线输入电压70 V到276 V (AC)，具有过流保护（OCP），过压保护（OVP）和去磁传感，保证在所有条件下安全工作。HBC控制器集成了高压电压转移器，半桥开关频率最大为500kHz，自适应的非重叠时间和突发模式开关，主要用在LCD TV，等离子电视和适配器。本文介绍了TEA1713主要特性，方框图，应用框图和250W LCD TV与70W 笔记本电脑适配器电源电路图，以及采用TEA1713和TEA1795 150W一体化PC适配器电路图，材料清单。

TEA1713 and TEA1795 demo board for 150 W all-in-one PC adapter

The TEA1713 integrates a Power Factor Corrector (PFC) controller and a controller for a Half-Bridge resonant Converter (HBC) in a multi-chip IC. It provides the drive function for the discrete MOSFET in an up-converter and for the two discrete power MOSFETs in a resonant half-bridge configuration.

The efficient operation of the PFC is achieved by implementing functions such as quasi-resonant operation at high power levels and quasi-resonant operation with valley skipping at lower power levels. OverCurrent Protection (OCP), OverVoltage Protection (OVP), and demagnetization sensing ensure safe operation under all conditions. The HBC module is a is a high-voltage controller for a zero-voltage switching LLC resonant converter. It contains a high-voltage level shift circuit and several protection circuits including OCP, open-loop protection, capacitive mode protection and a general purpose latched protection input.

The high-voltage chip is fabricated using a proprietary high-voltage Bipolar-CMOS-DMOS power logic process that enables efficient direct start-up from the rectified universal mains voltage. The low-voltage Silicon On Insulator (SOI) chip is used for accurate, high-speed protection functions and control.

The topology of a PFC circuit and a resonant converter controlled by the TEA1713 is very flexible, enabling it to be used in a broad range of applications with a wide mains voltage range. Combining PFC and HBC controllers in a single IC makes the TEA1713 ideal for controlling power supplies in LCD and plasma televisions.

Highly efficient and reliable power supplies providing over 100 W can be designed easily using the TEA1713, with a minimum of external components.

TEA1713主要特性：

1． General features

􀂄 Integrated PFC and HBC controllers

􀂄 Universal mains supply operation (70 V to 276 V (AC))

􀂄 High level of integration resulting in a low external component count and a cost effective design

􀂄 Enable input (enable only PFC or both PFC and HBC controllers)

􀂄 On-chip high-voltage start-up source

􀂄 Stand-alone operation or IC supplied from external DC source

2．PFC controller features

􀂄 Boundary mode operation with on-time control

􀂄 Valley/zero voltage switching for minimum switching losses

􀂄 Frequency limiting to reduce switching losses

􀂄 Accurate boost voltage regulation

􀂄 Burst mode switching with soft start and soft stop

3．HBC controller features

􀂄 Integrated high-voltage level shifter

􀂄 Adjustable minimum and maximum frequency

􀂄 Maximum 500 kHz half-bridge switching frequency

􀂄 Adaptive non-overlap time

􀂄 Burst mode switching

4． Protection features

􀂄 Safe restart mode for system fault conditions

􀂄 General latched protection input for output overvoltage protection or external temperature protection

􀂄 Protection timer for time-out and restart

􀂄 Overtemperature protection

􀂄 Soft (re)start for both controllers

􀂄 Undervoltage protection for mains (brownout), boost, IC supply and output voltage

􀂄 Overcurrent regulation and protection for both controllers

􀂄 Accurate overvoltage protection for boost voltage

􀂄 Capacitive mode protection for HBC controller

TEA1713应用：

􀂄 LCD television

􀂄 Plasma television

􀂄 Adapters

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图1。TEA1713方框图

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图2。TEA1713内部电源框图

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图3。TEA1713应用框图

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图4。TEA1713 250W LCD TV电源电路图（1）

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图5。TEA1713 250W LCD TV电源电路图（2）

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图6。TEA1713 250W LCD TV电源电路图（3）

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图7。TEA1713 70W 笔记本电脑适配器电源电路图（1）

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图8。TEA1713 70W 笔记本电脑适配器电源电路图（2）

采用TEA1713和TEA1795 150W一体化PC适配器

The purpose of the demo board is to demonstrate the operation of the TEA1713T and TEA1795T in a single output supply including burst mode operation. The performance is according today’s general standards and can be used as a starting point for further development.

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图9。150W一体化PC适配器外形图