SMM665C datasheet(18/36 Pages) SUMMIT

Part #	SMM665C

Description	Six-Channel Active DC Output Controller, Monitor, Marginer and Sequencer

PDF	36 Pages

Scroll/Zoom	100%

Manufacturer	SUMMIT [Summit Microelectronics, Inc.]

Direct Link	http://www.summitmicro.com

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18 / 36 page

SMM665C

Summit Microelectronics, Inc

2125 3.1 7/22/2008

APPLICATIONS INFORMATION (CONTINUED)

SMM665C BROWNOUT RECOVERY/HANDLING

During a power ‘brown-out’ (Figure 9) the SMM665C

can default to a power-off state, thus requiring toggling

of the PWR_ON/OFF pin to enable the device to

perform a power-on sequence. For applications using

2C control of the power-on/power-off function, the

same result may be effected by, upon recovery of

power, issuing a software (I

2C) ‘Power-Off’ command

followed by a ‘Power-On’ command and ending with

a ‘Clear’ command. If the PWR_ON/OFF pin is in the

asserted state, the SMM665C will initiate a power-on

sequence once all input conditions are met. Otherwise

the PWR_ON/OFF pin may require toggling if, upon

recovery from the ‘brownout’, it is in the de-asserted

state.

-48V Supply

-48V

SMM665 Supplies

Power Brown-Out

VDD_CAP

+12VIN

SMM665 Hold-Up Time

Figure 9 - Power Brown-Out with Resulting Loss of SMM665C Supply Voltages

SMM665C Datasheet(PDF) 18 Page - Summit Microelectronics, Inc.