DNL10S0A0S16PFD Datasheet, PDF (11/15 Pages) Delta Electronics, Inc. – Non-Isolated Point of Load DC/DC Power Modules: 8.3-14Vin, 0.75-5.0V/16A out

FEATURE DESCRIPTIONS (CON.)
Sequential Start-up
Sequential start-up (Figure 27) is implemented by placing
an On/Off control circuit between Vo_PS1 and the On/Off pin
of PS2.
Vin
On/Off
PS1
VoPS1
R1
R2
R3
Q1
C1
PS2
Vin
On/Off
VoPS2
Ratio-Metric
Ratio–metric (Figure 29) is implemented by placing the
voltage divider on the TRACK pin that comprises R1 and
R2, to create a proportional voltage with Vo_PS1 to the
Track pin of PS2.
For Ratio-Metric applications that need the outputs of
PS1 and PS2 reach the regulation set point at the same
time
The following equation can be used to calculate the value
of R1 and R2.
The suggested value of R2 is 10kΩ.
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 Vo_PS1 to the TRACK pin of PS2. Please note
the voltage apply to TRACK pin needs to always higher
than the Vo_PS2 set point voltage.
Vin
On/Off
PS1
Vin
VoPS1
TRACK
On/Off
PS2
VoPS2
V_{o,PS 2 =} R₂
V_o,PS1 R₁ + R₂
Vin
On/Off
PS1
Vin
VoPS1
R1
R2
TRACK
On/Off
PS2
VoPS2
The high for positive logic
The low for negative logic
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