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DNL10S0A0R20PFD Datasheet(PDF) 8 Page - Delta Electronics, Inc.

Part # DNL10S0A0R20PFD
Description  Non-Isolated Point of Load DC/DC Power Modules: 8.3-14Vin, 0.75-5.0V/20A out
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Manufacturer  DELTA [Delta Electronics, Inc.]
Direct Link  http://www.deltaww.com
Logo DELTA - Delta Electronics, Inc.

DNL10S0A0R20PFD Datasheet(HTML) 8 Page - Delta Electronics, Inc.

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PRELIMINARY DS_DNL10SIP20_10132008
8
TEST CONFIGURATIONS
VI(+)
VI(-)
BATTERY
2 100uF
Tantalum
L
TO OSCILLOSCOPE
Note: Input reflected-ripple current is measured with a
simulated
source
inductance.
Current
is
measured at the input of the module.
Figure 28:
Input reflected-ripple test setup
Vo
GND
COPPER STRIP
470uF
poscap
100uF
ceramic
SCOPE
Resistive
Load
Note: Use a 470μF poscap and 100μF ceramic. Scope
measurement should be made using a BNC
connector.
Figure 29:
Peak-peak output noise and startup transient
measurement test setup
SUPPLY
I
VI
Vo
GND
Io
LOAD
CONTACT AND
DISTRIBUTION LOSSES
CONTACT RESISTANCE
Figure 30:
Output voltage and efficiency measurement test
setup
Note: All measurements are taken at the module
terminals. When the module is not soldered (via
socket), place Kelvin connections at module
terminals to avoid measurement errors due to
contact resistance.
%
100
)
(
×
×
×
=
Ii
Vi
Io
Vo
η
DESIGN CONSIDERATIONS
Input Source Impedance
To maintain low-noise and ripple at the input voltage, it is
critical to use low ESR capacitors at the input to the
module. The models using 6x47uF low ESR tantalum
capacitors (SANYO P/N:16TQC47M, 47uF/16V or
equivalent) and 6x22 uF very low ESR ceramic
capacitors (TDK P/N:C3225X7S1C226MT, 22uF/16V or
equivalent) for example.
The input capacitance should be able to handle an AC
ripple current of at least:
Arms
Vin
Vout
Vin
Vout
Iout
Irms
⎟
⎠
⎞
⎜
⎝
⎛ −
=
1


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