TEA1753T主要特性和優(yōu)勢:

1. Distinctive features

Integrated PFC and flyback controller

Universal mains supply operation (70 V AC to 276 V AC)

Dual boost PFC with accurate maximum output voltage (NXP patented)

High level of integration, resulting in a very low external component count and a cost-effective design

Adjustable PFC switch-off delay

2. Green features

On-chip start-up current source

Power down functionality for very low standby power

3. PFC green features

Valley/zero voltage switching for minimum switching losses (NXP patented)

Frequency limitation to reduce switching losses

PFC is switched off when a low load is detected at the flyback output

4. Flyback green features

Valley switching for minimum switching losses (NXP patented)

Frequency reduction with adjustable minimum peak current at low power operation to
maintain high efficiency at low output power levels

5. Protection features

Safe restart mode for system fault conditions

Continuous mode protection by means of demagnetization detection for both converters (NXP patented)

UnderVoltage Protection (UVP) (foldback during overload)

Accurate OverVoltage Protection (OVP) for both converters (adjustable for flyback converter)

Mains voltage independent OverPower Protection (OPP)

Open control loop protection for both converters. The open-loop protection on the
flyback converter is a safe restart on the TEA1753T

IC OverTemperature Protection (OTP)

Low and adjustable OverCurrent Protection (OCP) trip level for both converters

General purpose input for latched protection, e.g. to be used for system Over Temperature Protection (OTP)

TEA1753T應(yīng)用:

The device can be used in all applications that require an efficient and cost-effective
power supply solution for up to 250 W. Notebook adapters in particular can benefit
from the high level of integration

圖1.TEA1753T方框圖

圖2.TEA1753T典型配置圖

圖3.TEA1753T典型應(yīng)用框圖
NXP公司的TEA1753T是第三代 GreenChip III開關(guān)電源(SMPS)控制器,它集成了功率因素修正(PFC)控制器和反激控制器,通用火線電壓70 VAC到276 VAC,內(nèi)建的綠色功能在各個功率等級都實現(xiàn)了高效率:大功率時采用準(zhǔn)諧振工作,低功率時采用降頻工作,并把PFC關(guān)斷,以獲得高效率.主要用在250W的高削低成本電源,特別是筆記本電腦適配器.TEA1753T主要特性和優(yōu)勢,方框圖, 典型配置圖和典型應(yīng)用框圖.