DNL04S0A0R16NFA DELTA [Delta Electronics, Inc.], DNL04S0A0R16NFA Datasheet - Page 8

• Manufacturer Part Number: DNL04S0A0R16NFA
• Description: Delphi DNL, Non-Isolated Point of Load DC/DC Power Modules: 2.8-5.5Vin, 0.75-3.3V/16A out
• Manufacturer: DELTA [Delta Electronics, Inc.]

TEST CONFIGURATIONS
Note: Input reflected-ripple current is measured with a
simulated source inductance. Current is measured at
the input of the module.
Figure 29: Input reflected-ripple test setup
Note: Use a 10µF tantalum and 1µF capacitor. Scope
measurement should be made using a BNC connector.
Figure 30: Peak-peak output noise and startup transient
Figure 31: Output voltage and efficiency measurement test
Note: All measurements are taken at the module
DS_DNL04SIP16A_10052006
BATTERY
terminals. When the module is not soldered (via
socket), place Kelvin connections at module
terminals to avoid measurement errors due to
contact resistance.
SUPPLY
CONTACT RESISTANCE
GND
measurement test setup.
setup
Vo
I
I
TO OSCILLOSCOPE
η
=
(
Vo
Vi
COPPER STRIP
×
×
L
10uF
tantalum
Io
Ii
V
I
Tantalum
GND
2
)
×
100uF
Vo
100
ceramic
1uF
%
DISTRIBUTION LOSSES
SCOPE
CONTACT AND
V
V
Io
I
I
(+)
(-)
Resistive
Load
LOAD
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. Figure 32 shows the input ripple voltage (mVp-p)
for various output models using 200 µF(2 x100uF) low
ESR
AVX p/n: TAJD107M106R, or equivalent) in parallel with
47 µF ceramic capacitor (TDK p/n:C5750X7R1C476M or
equivalent). Figure 33 shows much lower input voltage
ripple when input capacitance is increased to 400 µF (4 x
100 µF)
µF) ceramic capacitor.
The input capacitance should be able to handle an AC
ripple current of at least:
Figure 32: Input voltage ripple for various output models, IO =
16 A (CIN = 2
16 A (CIN = 4
Irms
Figure 33: Input voltage ripple for various output models, IO =
tantalum
=
Iout
tantalum
350
300
250
200
150
100
200
150
100
50
50
0
0
×
×
0
0
100 µF tantalum // 47 µF ceramic)
100 µF tantalum // 2
capacitor (KEMET p/n: T491D107M016AS,
Vout
Vin
capacitors in parallel with 94 µF (2 x 47
⎛
⎜
⎝
1
1
1
−
Vout
Vin
Output Voltage (Vdc)
Output Voltage (Vdc)
⎞
⎟
⎠
×
2
2
47 µF ceramic)
Arms
3
3
5.0Vin
3.3Vin
5.0Vin
3.3Vin
4
4
8