TEA1753T

TEA1753T HV start-up DCM/QR flyback controller with integrated DCM/QR PFC controller Rev. 3 — 24 August 2012 Product data sheet 1. 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 Silico...