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FEATURE DESCRIPTIONS (CON.
Sequential Start-up
Sequential start-up (Figure 40) is implemented by placing
an On/Off control circuit between Vo
of PS2.
PS1
Vin
Vo
PS1
R1
On/Off
R2
Simultaneous
Simultaneous tracking (Figure 41) 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 Vo
to the TRACK pin of PS2. Please note
PS1
the voltage apply to TRACK pin needs to always higher
than the Vo
set point voltage.
PS2
PS1
Vin
Vo
PS1
On/Off
DS_DNM04SMD10_07162008
)
and the On/Off pin
PS1
PS2
Vin
Vo
R3
On/Off
Q1
C1
PS2
Vin
Vo
PS2
TRACK
On/Off
PS2
12
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