DNL10S0A0S20NFD Delta Electronics, Inc., DNL10S0A0S20NFD Datasheet - Page 7

• Manufacturer Part Number: DNL10S0A0S20NFD
• Description: Delphi Dnl10, Non-isolated Point Of Load Dc/dc Power Modules 8.3-14vin, 0.75-5.0v/20a Out
• Manufacturer: Delta Electronics, Inc.

TEST CONFIGURATIONS
Note: Input reflected-ripple current is measured with a
Figure 25: Input reflected-ripple test setup
Note: Use a 100μF and 1μF ceramic capacitor. Scope
Figure 26: Peak-peak output noise and startup transient
Figure 27: Output voltage and efficiency measurement test
Note: All measurements are taken at the module
DS_DNL10SMD_03062009
SUPPLY
BATTERY
CONTACT RESISTANCE
GND
Vo
simulated
measured at the input of the module.
measurement should be made using a BNC
connector.
terminals. When the module is not soldered (via
socket), place Kelvin connections at module
terminals to avoid measurement errors due to
contact resistance.
I
measurement test setup
setup
TO OSCILLOSCOPE
COPPER STRIP
η
ceramic
=
100uF
VI
(
source
Vo
GND
Vi
L
Vo
×
×
ceram ic
1uF
4 47uF
Io
Ii
ceramic
×
)
DISTRIBUTION LOSSES
×
inductance.
SCOPE
100
CONTACT AND
Io
%
V
V
Resistive
I
I
LOAD
(+)
Load
(-)
Current
is
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 4x47 uF very low ESR
ceramic
GRM32ER61C476ME15L, 47uF/16V or equivalent) for
example.
The input capacitance should be able to handle an AC
ripple current of at least:
(Cin = 4x22uF ceramic capacitors at the input)
Irms
Figure 28: Input ripple voltage vs. output models, Io = 20A
=
450
400
350
300
250
200
150
100
50
0
Iout
0
Vout
Vin
capacitors
1
⎛
⎜
⎝
1
−
Vout
2
Vin
Output Voltage (Vdc)
⎞
⎟
⎠
3
Arms
(MURATA
4
Ceramic
5
P/N:
6
7