Secondary Side Housekeeping Circuit
AS23xx
Secondary Side Housekeeping Circuit
Features
Description
• Standard PC Power Good: UV Detection on 4 rails UV ...
Description
AS23xx
Secondary Side Housekeeping Circuit
Features
Description
Standard PC Power Good: UV Detection on 4 rails UV Detection of AC/Bulk supply OV Detection on 4 rails Open collector PG out
Pogrammable Fault output: OV OV plus UV OV plus UV after startup delay
OV Crow Bar Driver
Digital ON/OFF input
2.5V Voltage Reference
Operates from 5V or 12V rail
The AS23xx is a housekeeping circuit for monitoring the outputs of power supplies. It directly senses all the output rails without the need for external dividers and detects undervoltage and overvoltage. It also provides an additional undervoltage comparator which may be configured with any arbitrary hysteresis to sense a divided down representation of the AC bulk voltage. The housekeeping section provides all the features necessary to allow external caps to set the common timing features of PC type power supplies. In addition, negative rails may be sensed without the necessity of a VEE connection, and negative s...
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