cdc nfa020

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Non-Isolated 20A SIP/SMT DC/DC Converters
VOLANT NFA020 Series
Features:
9
Small size, minimal footprint – SMT/SIP package
9
20A Output Current (all voltages)
9
High Efficiency: up to 95%
9
High reliability
9
RoHS Compliant
9
Output voltage programmable by an external resistor.
9
Monotonic Startup with Pre-Bias
9
+’ve Enable Logic and –‘ve Enable Logic models available
9
Optional Power Good Signal
9
Sequencing / Tracking Feature
Output
Input
Efficiency
Vout
(V)
Iout
(A)
PARD
(mVp-p)
Regulation
Max
Vin
Nom.
(V)
Range
(V)
Iin
Typ
(A)
Full Load
Typ. Max.
Line
Load
Typ.
0.75
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
1.299
77%
1.2
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
1.928
83%
1.5
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
2.326
86%
1.8
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
2.727
88%
2.0
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
2.996
89%
2.5
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
3.704
90%
3.3
20
50
75
+/-0.2%
+/-0.5%
12
6.0 – 14
4.783
92%
5.0
20
50
75
+/-0.2%
+/-0.5%
12
6.5 – 14
7.092
94%
1
NFA020_6200760000_B04_21/04/08
 Murata Power Solutions
Non-Isolated 20A SIP/SMT DC/DC Converters
VOLANT NFA020 Series
Input Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Input Voltage Operating Range
6.0
12
14
Vdc
Minimum 6.5 V input @ 5 volts output
Input Reflected Ripple Current
200
mA p-p
A
2
s
Inrush Current Transient
0.2
Input Filter Type (external)
100
μ
F
Input Turn ON Threshold
5
V
Input Turn OFF Threshold
3.9
V
Enable
(Positive enable has 20K pullup)
(Negative enable has no internal
pullup resistor)
Positive enable: ON
open
Positive enable: OFF
<0.4
Vdc
Negative enable: ON;
open circuit or
<0.4
Vdc
Negative enable: OFF
2
Vin
Output Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Vout Accuracy
100% load
-1.5
+1.5
%
Output Loading
0
20
A
Output Ripple & Noise
@ 20Mhz Bandwidth.
75
mVp-p
Maximum Capacitive Load
Low ESR
8000
μ
F
Vout Trim Range (Nom)
0.75
5.0
V
Total Accuracy
Over line/load temperature
<2%
Current Limit
28
A
Output Line Regulation
-0.2
+0.2
%
Output Load Regulation
-0.5
+0.5
%
Turn-on Overshoot
1
%
SC Protection Technique
Hiccup with auto recovery
Pre-bias Start-up at output
Unit starts monotonically with pre-
bias
Power Good Signal: Vout
Active: no load (
470K internal pull-up
)
3.9
4.2
4.5
V
Out of regulation:
0.3
0.5
V
Dynamic Characteristics
Notes & Conditions
Min
Typ.
Max
Units
Load Transient
100
mV
50% step, 0.1A/
μ
s
Settling Time
200
μ
s
Frequency
300
KHz
Rise Time
10% Vo to 90% Vo
3.5
ms
Start-Up Time
Vin to Vout and On/Off to Vout
7
ms
General Specifications
Notes & Conditions
Min
Typ.
Max
Units
MTBF
Calculated (MIL-HDBK-217F)
891
kHrs
Thermal Protection
Hotspot
110
°C
Operating Temperature
Without derating 300LFM
-40
50
°C
Operating Ambient Temperature
See Power derating curve
-40
85
°C
SIP Dimensions
2.4”Lx0.327”Wx0.510”H
(50.8x8.3x13.0mm)
SMT Dimensions
1.30”Lx0.53”Wx0.366”H
(33x13.46x9.3mm)
SIP Pin Dimensions
0.025” (0.64mm) SQUARE
0.64
mm
SMT Block Dimensions
0.063” x0.065” x 0.112”
SQUARE
Pin and Block Material
Matte Sn Finish on component
Leads
Flammability Rating
UL94V-0
2
NFA020_6200760000_B04_21/04/08
 Murata Power Solutions
Non-Isolated 20A SIP/SMT DC/DC Converters
VOLANT NFA020 Series
Standards Compliance
CSA C22.2, No.60950/UL 60950, Third Edition (2000), File UL E165113
Thermal Considerations
The power module operates in a variety of thermal environments; however, sufficient cooling should
be provided to help ensure reliable operation of the unit.
The thermal data presented is based on measurements taken at various airflows. Note that airflow is
parallel to the long axis of the module as shown in Figure 1 and derating applies accordingly.
Figure 1. Thermal Tests Set-Up.
The temperature at either location should not exceed 110
°
C. Over-temperature shutdown is
evaluated at these locations. The output power of the module should not exceed the rated power for
the module(Vo,set X Io,max).
Convection Requirements for Cooling
To predict the approximate cooling needed for the module, refer to the Power Derating Curves in
Figures 2-17 .
These derating curve are approximations of the ambient temperature and airflow required to keep the
power module temperature below it's maximum rating. Once the module is assembled in the actual
system, the module's temperature should be verified.
3
NFA020_6200760000_B04_21/04/08
 Murata Power Solutions
Non-Isolated 20A SIP/SMT DC/DC Converters
VOLANT NFA020 Series
TYPICAL DERATING CURVES SIP/SMT VERSION
NFA020 SMT Derating Curve V1.0 Vout=0.75V
NFA020 SMT Derating Curve Vout=0.75V
25
20
15
0LFM
100LFM
200LFM
300LFM
400LFM
10
5
0
30
40
50
60
70
80
90
A mbient Temperature(
o
C)
Fig. 2. SMT Derating of Output Current for 12Vin 0.75V Out.
NFA020 SIP Derating Curve V1.0 Vout=0.75V
NFA020 SIP Derating Curve Vout=0.75V
25
20
15
0LFM
10 0 L F M
200LFM
300LFM
400LFM
10
5
0
30
40
50
60
70
80
90
Ambient Temperature (C)
Fig. 3. SIP Derating of Output Current for 12Vin 0.75V Out.
4
NFA020_6200760000_B04_21/04/08
 Murata Power Solutions
Non-Isolated 20A SIP/SMT DC/DC Converters
VOLANT NFA020 Series
NFA020 SMT Derating Curve Vout=1.2V
NFA020 SMT Derating Curve V1.0 Vout=1.2V
25
20
15
0LFM
10 0 L F M
200LFM
300LFM
400LFM
10
5
0
30
40
50
60
70
80
90
A mbient Temperature(
o
C)
Fig 4. SMT Derating of Output Current for 12Vin 1.2V Out.
NFA020 SIP Derating Curve V1.0 Vout=1.2V
NFA020 SIP Derating Curve Vout=1.2V
25
20
15
0LFM
100LFM
200LFM
300LFM
400LFM
10
5
0
30
40
50
60
70
80
90
Ambient Temperature (C)
Fig 5. SIP Derating of Output Current for 12Vin 1.2V Out.
5
NFA020_6200760000_B04_21/04/08
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