DNM10SMD10 datasheet(10/15 Pages) DELTA

10 / 15 page

DS_DNM10SMD10_07182012

FEATURE DESCRIPTIONS (CON.)

The output voltage tracking feature (Figure 27 to Figure

29) is achieved according to the different external

connections. If the tracking feature is not used, the

TRACK pin of the module can be left unconnected or tied

to Vin.

For proper voltage tracking, input voltage of the tracking

power module must be applied in advance, and the

remote on/off pin has to be in turn-on status. (Negative

logic: Tied to GND or unconnected. Positive logic: Tied to

Vin or unconnected)

Figure 27: Sequential start-up

Figure 28: Simultaneous

Figure 29: Ratio-metric

PS1

PS2

PS1

PS2

Sequential Start-up

Sequential start-up (Figure 27) is implemented by placing

an On/Off control circuit between VoPS1 and the On/Off pin

of PS2.

VoPS1

PS1

Vin

On/Off

PS2

VoPS2

Vin

Simultaneous

Simultaneous tracking (Figure 28) is implemented by

using the TRACK pin. The objective is to minimize the

voltage difference between the power supply outputs

during power up and down.

The simultaneous tracking can be accomplished by

connecting VoPS1 to the TRACK pin of PS2. Please note

the voltage apply to TRACK pin needs to always higher

than the VoPS2 set point voltage.

TRACK

VoPS1

PS2

VoPS2

PS1

Vin

On/Off

PS1

PS2

PS1

PS2

+△V

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