TEA1552T

Product Summary

The TEA1552T is a green Switched Mode Power Supply (SMPS) control IC. It operates 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 typical application areas of the TEA1552T are adapters and chargers (e.g. for laptops, camcorders and printers) and all applications that demand an efficient and cost-effective solution up to 250 W. 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 TEA1552T system operates at reduced frequency and with valley detection.

Parametrics

TEA1552T absolute maximum ratings: (1)VVCOadj, voltage on pin VCOadj: -0.4 to +5 V when continuous; (2)Vsense, voltage on pin Isense: -0.4V min when current limited; (3)VDRAIN, voltage on pin DRAIN: -0.4 to +650 V; (4)VCC, supply voltage: -0.4 to +20 V when continuous; (5)VLOCK, voltage on pin LOCK: -0.4 to +7 V when continuous; (6)VCTRL, voltage on pin CTRL: -0.4 to +5 V; (7)VDEM, voltage on pin DEM: -0.4V min when current limited; (8)Isense, current on pin Isense: -1 to +10 mA; (9)ISTDBY, current on pin STDBY: -1mA min; (10)IDRIVER, current on pin DRIVER: -0.8 to +2 A when d < 10%; (11)IDRAIN, current on pin DRAIN : +5 mA max; (12)ICC(5V), current on pin VCC(5V): -1 to 0 mA; (13)ICTRL, current on pin CTRL: +5 mA max; (14)IDEM, current on pin DEM: -250 to +250 mA; (15)Ptot, total power dissipation: 0.75 W max when Tamb<70℃; (16)Tstg, storage temperature: -55 +150℃; (17)Tj, junction temperature: -20 +145℃; (18)Vesd, electrostatic discharge voltage: pins 1 to 6 and pins 9 to 14: 2000V max when HBM class; pin 7: 1500V max when HBM class 1; any other pin: 400 V max when MM.

Features

TEA1552T features: (1)Valley or zero voltage switching for minimum switching losses; (2)Efficient quasi-resonant operation at high power levels; (3)Frequency reduction at low power standby for improved system efficiency (<3 W); (4)Cycle skipping mode at very low loads. Pi < 300 mW at no-load operation for a typical adapter application; (5)On-chip start-up current source; (6)Standby indication pin to indicate low output power consumption; (7)Safe restart mode for system fault conditions; (8)Continuous mode protection by means of demagnetization detection (zero switch-on current); (9)Accurate and adjustable overvoltage protection (latched); (10)Short winding protection.

Diagrams