General description
The TEA1753T is the third generation of green Switched Mode Power Supply (SMPS) controller ICs. The TEA1753T combines a controller for Power Factor Correction (PFC) and a flyback controller. Its high level of integration allows the design of a cost-effective power supply with a very low number of external components.
The special built-in green functions provide high efficiency at all power levels. This efficiency applies to quasi-resonant operation at high-power levels, quasi-resonant operation with valley skipping, as well as reduced frequency operation at lower power levels. At low-power levels, the PFC switches off to maintain high efficiency.
During low-power conditions, the flyback controller switches to frequency reduction mode and limits the peak current to an adjustable minimum value. This mode ensures high efficiency at low-power and good standby power performance while minimizing audible noise from the transformer.
The controller is switched to the power-down mode for no-load operation. In this mode, the controller is shut down for very low standby power applications.
The TEA1753T is a Multi-Chip Module, (MCM), containing two chips. The proprietary high-voltage BCD800 process which makes direct start-up possible from the rectified universal mains voltage in an effective and green way. The second low voltage Silicon On Insulator (SOI) is used for accurate, high-speed protection functions and control.
The TEA1753T enables the design of highly efficient and reliable supplies with power requirements of up to 250 W using the minimum number of external components.
Remark: All values provided throughout this data sheet are typical values unless otherwise stated.

FEATUREs and benefits
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
  
Green features
   ■ On-chip start-up current source
   ■ Power down functionality for very low standby power
  
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

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
  
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 latched protection input for system OverTemperature Protection (OTP) for example
  
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 benefit from the high
   level of integration