DESCRIPTION

The L6611 is a control and housekeeping IC developed in BCD technology; it is intended for acting at the secondary side of desktop PCs or servers switching power supplies, in presence of standard voltage rails (+3.3V, +5V, ±12V) generated by a main converter and of a supply line generated by an auxiliary converter. The typical application circuit is showed on the front page.

■ OV/UV DETECTION FOR 3.3V, +5V, ±12V RAILS AND 5V (OR 3.3V) AUX. VOLTAGE

■ AC MAINS UV (BROWNOUT) DETECTION WITH HYSTERESIS

■ ON-LINE DIGITAL TRIMMING FOR 5V/12V, 3.3V, 5V (OR 3.3V) AUX. FEEDBACK REFERENCES AND AC MAINS UV.

■ DIGITALLY SELECTABLE OPTIONS

■ ERROR AMPLIFIERS FOR 5V/12V RAILS (MAIN SUPPLY), 3V3 POST-REGULATOR (MAG_AMP OR LINEAR) AND AUXILIARY SUPPLY.

■ MAIN SUPPLY ON/OFF CONTROL AND POWER GOOD SIGNAL

■ 50mA CROWBAR DRIVE FOR AUXILIARY OUTPUT OVP.

■ OPEN GROUND PROTECTION

■ 8ms DIGITAL SOFT START

■ 64 ms UV/OC BLANKING AT START-UP

APPLICATIONS

■ SWITCHING POWER SUPPLIES FOR DESKTOP PCS, SERVERS AND WEB SERVERS

■ SUPERVISOR FOR DISTRIBUTED POWER