DESCRIPTION

The L6610 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

■ OC DETECTION ON 12V AND 5V (OR 3.3V)

RAILS

■ 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