TEA1751T All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
Product data sheet Rev. 3 — 10 January 2013 2 of 31
NXP Semiconductors
TEA1751T
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 safe restart
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
