This document describes the features and characteristics of the L6610 product, including over/under voltage detection, open circuit detection, AC mains under voltage detection, digitally selectable options, error amplifiers, main supply control, and power good signal.
The L6610 is a control and housekeeping IC developed in BCD technology, intended for acting at the secondary side of desktop PC's or server's switching power supplies. It monitors standard voltage rails (+3.3V, +5V, +12V) and an auxiliary supply line, sensing voltages and sending feedback signals to primary controllers for regulation. Upon detecting undervoltage (UV), overvoltage (OV), or overcurrent (OC) conditions, it reports faults and takes protective actions.
A key feature of the L6610 is its digital programming capability, which enables accurate trimming of output voltage rails during production test via software without external discrete trimming components. The IC embeds reference voltages, error amplifiers, and most housekeeping circuitry to contribute to a very low external component count. It supports digitally selectable options for error amplifiers and fault handling modes.
| Technology | BCD |
|---|---|
| UV/OC Blanking Time | 64 ms |
| Soft Start Time | 8ms |
| Crowbar Drive Current | 50mA |
| Main Supply On/Off Control Current | 10mA |
| DFAULT Sourcing Capability | 50mA |
| PW-OK Delay | 250ms |
| OFF Delay | 2.5ms |
| Package Type | SDIP24 |
The L6610 is intended for switching power supplies for desktop PC's, servers and web servers, and as a supervisor for distributed power.
The chip enters programming mode by forcing the PROG input pin high (+5V), allowing selection of options and adjustment of setpoints via PW_OK and PS_ON pins.