TEA1751LT 查看數據表（PDF） - NXP Semiconductors.

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TEA1751LT

HV start-up DCM/QR flyback controller with integrated DCM/QR PFC controller

NXP Semiconductors. 

NXP Semiconductors

TEA1751LT

HV start-up flyback controller with integrated PFC controller

2. Features and benefits

2.1 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

2.2 Green features

 On-chip start-up current source

2.3 PFC green features

 Valley/Zero Voltage Switching (ZVS) 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

2.4 Flyback green features

 Valley switching for minimum switching losses (NXP patented)

 Frequency reduction with fixed minimum peak current at low-power operation to

maintain high efficiency at low output power levels

2.5 Protection features

 Safe restart mode for system fault conditions

 Continuous mode protection with 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 latched

 OverTemperature Protection (OTP)

 Low and adjustable OverCurrent Protection (OCP) trip level for both converters

 General-purpose input for latched protection to provide system OverTemperature

Protection (OTP) for example

3. Applications

 The device is used in all applications requiring an efficient and cost-effective power

supply solutions up to 250 W. Notebook adapters in particular can benefit from the

high level of integration

TEA1751LT

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 3. — 9 January 2013

© NXP B.V. 2013. All rights reserved.

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