DNL10S0A0R20PFB Delta Electronics, Inc., DNL10S0A0R20PFB Datasheet - Page 8

• Manufacturer Part Number: DNL10S0A0R20PFB
• Description: Delphi Dnl, 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 28: Input reflected-ripple test setup
Note: Use a 470μF poscap and 100μF ceramic. Scope
Figure 29: Peak-peak output noise and startup transient
Figure 30: Output voltage and efficiency measurement test
Note: All measurements are taken at the module
PRELIMINARY DS_DNL10SIP20_10132008
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
=
470uF
poscap
VI
(
source
Vo
GND
Vi
Vo
L
×
×
100uF
ceramic
Tantalum
Io
Ii
2
)
100uF
DISTRIBUTION LOSSES
×
inductance.
SCOPE
100
CONTACT AND
Io
%
V
V
LOAD
I
(+)
I
Resistive
(-)
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 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:
Irms
=
Iout
Vout
Vin
⎛
⎜
⎝
1
−
Vout
Vin
⎞
⎟
⎠
Arms
8