TEA1533AT

Product Summary

The TEA1533AT is a second generation of green Switched Mode Power Supply (SMPS) control IC operating directly from the rectified universal mains. A high level of integration leads to a cost effective power supply with a very low number of external components. The special built-in green functions allow the efficiency to be optimum at all power levels. This holds for quasi-resonant operation at high power levels, as well as fixed frequency operation with valley switching at medium power levels. At low power (standby) levels, the system operates at a reduced frequency and with valley detection. The applications of the TEA1533AT include TV and monitor supplies and all applications that demand an efficient and cost-effective solution up to 250 W.

Parametrics

TEA1533AT absolute maximum ratings: (1)VCC, supply voltage continuous: -0.4 to +20 V; (2)VCTRL, voltage on pin CTRL: -0.4 to +5 V; (3)VDEM, voltage on pin DEM current limited: -0.4V; (4)Vsense, voltage on pin Isense current limited: -0.4V; (5)VDRAIN, voltage on pin DRAIN: -0.4 to +650 V; (6)ICTRL, current on pin CTRL d < 10%: -50 mA; (7)IDEM, current on pin DEM: -250 to +250 mA; (8)Isense, current on pin Isense: -1 to +10 mA; (9)IDRIVER, current on pin DRIVER d < 10%: -0.8 to +2 A; (10)IDRAIN, current on pin DRAIN: -5 mA; (11)Ptot, total power dissipation Tamb < 70℃: -0.75 W; (12)Tstg, storage temperature: -55 to +150℃; (13)Tj, operating junction temperature: -20 to +145℃.

Features

TEA1533AT features: (1)Universal mains supply operation (70 to 276 V AC); (2)High level of integration, giving a very low external component count; (3)Valley or zero voltage switching for minimum switching losses; (4)Efficient quasi-resonant operation at high power levels; (5)Frequency reduction at low power standby for improved; (6)system efficiency (<3 W); (7)Cycle skipping mode at very low loads; Pi <300 mW at no-load operation for a typical adapter application; (8)On-chip start-up current source; (9)Safe restart mode for system fault conditions; (10)Continuous mode protection by means of demagnetization detection (zero switch-on current); (11)Accurate and adjustable overvoltage protection (latched in TEA1533T, safe restart in TEA1533AT); (12)Short winding protection; (13)Undervoltage protection (foldback during overload); (14)Overtemperature protection (latched in TEA1533T, safe restart in TEA1533AT); (15)Low and adjustable overcurrent protection trip level; (16)Soft (re)start; (17)Mains voltage-dependent operation enabling level.

Diagrams