TEA1533P and TEA1533AP are green chip TMII SMPS control ICs with universal mains supply operation, high level of integration and green features.
The document is a datasheet for the Philips GreenChip II series of Switched Mode Power Supply (SMPS) control integrated circuits, specifically models TEA1533P and TEA1533AP. These devices are designed to operate directly from rectified universal mains voltage with a high level of integration, resulting in power supplies with very low external component counts.
The device operates at a minimum frequency of approximately 25 kHz during low power standby or cycle skipping modes.
Shorting pin DEM to ground causes the converter to stop after the first stroke and enter safe restart mode until the short-circuit is removed.