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