DNT12S0A0S05

FEATURES

High Efficiency: 92.0% @ 12Vin, 5V/5A out

Small size and low profile:
0.80” x 0.45” x 0.27” (SMD)
0.90” x 0.40” x 0.25” (SIP)

Standard footprint and pinout

Resistor-based trim

Output voltage programmable from
0.75Vdc to 5.5Vdc via external resistors

Pre-bias startup

No minimum load required

Fixed frequency operation

Input UVLO, OCP

Remote ON/OFF

ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility

UL/cUL 60950-1 (US & Canada)
Recognized, and TUV (EN60950-1) certified

CE mark meets 73/23/EEC and 93/68/EEC directive
Delphi series DNT12 Non-Isolated Point of Load
DC/DC Power Modules: 8.3~14Vin, 0.75~5.5Vo, 5A
The Delphi series DNT12, 8.3V~14V input, 5A single output, non-isolated
point of load DC/DC converters are the latest offering from a world leader
in power systems technology and manufacturing -- Delta Electronics, Inc.
OPTIONS

Positive on/off logic

SIP package
The DNT12, 5A series provides a programmable output voltage from
0.75V to 5.5V using external resistors. This product family is available in a
surface mount or SIP package and provides up to 5A of current in an
industry standard footprint and pinout. With creative design technology
and optimization of component placement, these converters possess
outstanding electrical and thermal performance and extremely high
reliability under highly stressful operating conditions. The DNT12, 5A
modules have excellent thermal performance and can provide 5V, full
output current at up to 72℃ ambient temperature with no airflow.
DATASHEET
DS_DNT12SMD05_07182012
APPLICATIONS

Telecom/DataCom

Distributed power architectures

Servers and workstations

LAN/WAN applications

Data processing applications
TECHNICAL SPECIFICATIONS
(TA = 25°C, airflow rate = 300 LFM, Vin = 12Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
DNT12S0A0S05NFA
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
Operating Temperature
Storage Temperature
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Inrush Transient
Recommended Input Fuse
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Adjustable Range
Output Voltage Regulation
Over Line
Over Load
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Output Current Range
Output Voltage Over-shoot at Start-up
Output DC Current-Limit Inception
Output Short-Circuit Current (Hiccup mode)
DYNAMIC CHARACTERISTICS
Dynamic Load Response
Positive Step Change in Output Current
Negative Step Change in Output Current
Setting Time to 10% of Peak Devitation
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Startup Capacitive Load
EFFICIENCY
Vo=0.75V
Vo=1.2V
Vo=1.5V
Vo=1.8V
Vo=2.5V
Vo=3.3V
Vo=5.0V
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, (for Negative logic)
Logic Low Voltage
Logic High Voltage
Logic Low Current
Logic High Current
ON/OFF Control, (for Positive logic)
Logic High Voltage
Logic Low Voltage
Logic High Current
Logic Low Current
GENERAL SPECIFICATIONS
MTBF
Weight
Typ.
0
-40
-55
8.3
12
Max.
Units
15
85
125
Vdc
°C
°C
14
V
3.5
70
10
0.4
7
V
V
A
mA
mA
2
AS
A
+2.0
5.5
% Vo,set
V
+3.0
% Vo,set
%Vo,set
% Vo,set
% Vo,set
8.0
7.8
Vin=8.3V
Vo=5V
Vo=5V, Io=5A
50
2
Vin= Vin,min to Vin,max, Io=Io,min to Io,max
Vin=12V, Io=Io,max
-2.0
0.7525
Vin=Vin,min to Vin,max
Io=Io,min to Io,max
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Vin=min to max, Io=min to max1µF ceramic, 10µF Tan
Vin=min to max, Io=min to max1µF ceramic, 10µF Tan
Vo,set
0.3
0.4
0.4
-3.0
50
15
200
1.5
mV
mV
A
% Vo,set
% Io
Adc (rms)
200
200
25
mVpk
mVpk
µs
0
Io,s/c
10µF Tan & 1µF ceramic load cap, 2.5A/µs
50% Io, max to 100% Io, max
100% Io, max to 50% Io, max
Io=Io.max
Von/off, Vo=10% of Vo,set
Vin=Vin,min, Vo=10% of Vo,set
Full load; ESR ≧1mΩ
Full load; ESR ≧10mΩ
15
15
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Vin=12V, Io=Io,max
Module On, Von/off
Module Off, Von/off
Module On, Ion/off
Module Off, Ion/off
Module On, Von/off
Module Off, Von/off
Module On, Ion/off
Module Off, Ion/off
Io=Io,max, Ta=25℃
80
30
5
1
20
20
1000
3000
ms
ms
µF
µF
68.5
77.0
80.5
82.5
86.0
89.0
92.0
%
%
%
%
%
%
%
480
kHz
-0.2
2.5
0.2
0.3
Vin,max
10
1
V
V
uA
mA
0.2
Vin,max
0.3
10
1
V
V
uA
mA
-0.2
9.72
2.3
M hours
grams
DS_DNT12SMD05_07182012
2
96
93
90
87
84
81
78
75
72
95
92
89
86
83
80
77
74
71
Efficiency (%)
Efficiency (%)
ELECTRICAL CHARACTERISTICS CURVES
1
2
3
4
5
1
2
Out put cur r ent ( A)
Figure 1: Converter efficiency vs. output current
5
(12V in, 3.3V output voltage)
88
86
84
82
86
Efficiency (%)
Efficiency (%)
4
Figure 2: Converter efficiency vs. output current
(12V in, 5V output voltage)
80
78
76
74
84
82
80
78
76
74
72
1
2
3
4
1
5
2
3
4
5
Out put cur r ent ( A)
Out put cur r ent ( A)
Figure 3: Converter efficiency vs. output current
(12V in, 2.5V output voltage)
Figure 4: Converter efficiency vs. output current
(12V in, 1.8V output voltage)
84
80
82
78
Efficiency (%)
Efficiency (%)
3
Out put cur r ent ( A)
80
78
76
76
74
72
70
74
1
2
3
4
Out put cur r ent ( A)
Figure 5: Converter efficiency vs. output current
(12V in, 1.5V output voltage)
5
1
2
3
4
5
Out put cur r ent ( A)
Figure 6: Converter efficiency vs. output current
(12V in, 1.2V output voltage)
DS_DNT12SMD05_07182012
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ELECTRICAL CHARACTERISTICS CURVES
Figure 7: Output ripple & noise at 12Vin, 5.0V/5A out
pk-pk: 41.67mV, rms:12.11mV (50mV/div, 2uS/div)
Figure 8: Output ripple & noise at 12Vin, 3.3V/5A out
pk-pk: 37.1mV, rms: 9.5mV (50mV/div, 2uS/div)
Figure 9: Output ripple & noise at 12Vin, 2.5V/5A out
pk-pk :31.25mV, rms :7.38mV (50mv/div,2uS/div )
Figure 10: Output ripple & noise at 12Vin, 1.2V5A out
pk-pk: 27.08mV, rms: 5.05mV (50mV/div, 2uS/div)
Figure 11: Turn on delay time at 12Vin, 5.0V/5A out
(5mS/div),
Top trace: Vout, 5V/ div; Bottom trace: Vin, 10V/div
Figure 12: Turn on delay time at Remote On/Off, 5.0V/5A out
(5mS/div).
Top trace: Vout, 5V/div; Bottom trace: On/Off, 2V/div.
DS_DNT12SMD05_07182012
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ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Turn on Using Input On/Off with external
capacitors (Co=3000µF), 5.0V/5Aout (resistive load)
(5mS/div)
Top trace: Vout, 5V/div; Bottom trace: Vin, 10V/div
Figure 14: Turn on Using Remote On/Off with external
capacitors (Co=3000µF), 5.0V/5A out (resistive load)
(5mS/div)
Top trace: Vout, 5V/div; Bottom trace: On/Off, 2V/div
Figure 15: Typical transient response to step load change at
2.5A/μS from 100% to 50% of Io, max at 12Vin, 5.0V out
(Cout= 1uF ceramic+ 10μF Tantalum)(200mV/div, 10uS/div)
Figure 16: Typical transient response to step load change at
2.5A/μS from 50% to 100% of Io, max at 12Vin, 5.0V out
(Cout= 1uF ceramic+ 10μF Tantalum)(200mV/div, 10uS/div)
Figure 17: Output short circuit current 12Vin, 0.75Vout
(10A/div, 50mS/div)
Figure 18: Turn on with Prebias 12Vin, 1.8V/0A out,
Vbias =1.0Vdc. (5mS/div)
Top trace: Vout, 2V/div; Bottom trace: Vin, 10V/div
DS_DNT12SMD05_07182012
5
TEST CONFIGURATIONS
DESIGN CONSIDERATIONS
Input Source Impedance
TO OSCILLOSCOPE
L
VI(+)
2 100uF
Tantalum
BATTERY
VI(-)
Note: Input reflected-ripple current is measured with a
simulated source inductance. Current is measured at
the input of the module.
Figure 19: Input reflected-ripple test setup
COPPER STRIP
Vo
1uF
10uF
SCOPE
tantalum ceramic
Resistive
Load
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 input capacitance should be able to handle
an AC ripple current of at least:
Irms  Iout
Vout 
Vout 
1 

Vin 
Vin 
Arms
The power module should be connected to a low
ac-impedance input source. Highly inductive source
impedances can affect the stability of the module. An
input capacitance must be placed close to the modules
input pins to filter ripple current and ensure module
stability in the presence of inductive traces that supply
the input voltage to the module.
Safety Considerations
For safety-agency approval the power module must be
installed in compliance with the spacing and separation
requirements of the end-use safety agency standards.
GND
Note: Use a 10μF tantalum and 1μF capacitor. Scope
measurement should be made using a BNC connector.
Figure 20: Peak-peak output noise and startup transient
measurement test setup
CONTACT AND
DISTRIBUTION LOSSES
VI
Vo
I
Io
For the converter output to be considered meeting the
requirements of safety extra-low voltage (SELV), the
input must meet SELV requirements. The power module
has extra-low voltage (ELV) outputs when all inputs are
ELV.
The input to these units is to be provided with a
maximum (TBD) A of glass type fast-acting fuse in the
ungrounded lead.
LOAD
SUPPLY
GND
CONTACT RESISTANCE
Figure 21: 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.
(
Vo  Io
)  100 %
Vi  Ii
DS_DNT12SMD05_07182012
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FEATURES DESCRIPTIONS
FEATURES DESCRIPTIONS (CON.)
Remote On/Off
Output Voltage Programming
The DNT series power modules have an On/Off pin for
remote On/Off operation. Both positive and negative
On/Off logic options are available in the DNT series
power modules.
For positive logic module, connect an open collector
(NPN) transistor or open drain (N channel) MOSFET
between the On/Off pin and the GND pin (see figure 22).
Positive logic On/Off signal turns the module ON during
the logic high and turns the module OFF during the logic
low. When the positive On/Off function is not used, leave
the pin floating or tie to Vin (module will be On).
For negative logic module, the On/Off pin is pulled high
with an external pull-up resistor (see figure 23) Negative
logic On/Off signal turns the module OFF during logic
high and turns the module ON during logic low. If the
negative On/Off function is not used, leave the pin
floating or tie to GND. (module will be On)
 10500  1000  

 Vo  0.7525

Rtrim  
Rtrim is the external resistor in Ω
Vo is the desired output voltage.
For example, to program the output voltage of the DNT
module to 3.3Vdc, Rtrim is calculated as follows:
 10500  1000  

 2.5475

Rtrim  
Vo
Vin
The output voltage of the DNT can be programmed to any
voltage between 0.75Vdc and 5.5Vdc by connecting one
resistor (shown as Rtrim in Figure 25) between the TRIM
and GND pins of the module. Without this external
resistor, the output voltage of the module is 0.7525 Vdc.
To calculate the value of the resistor Rtrim for a particular
output voltage Vo, please use the following equation:
ION/OFF
RL
On/Off
GND
Figure 22: Positive remote On/Off implementation
DNT can also be programmed by applying a voltage
between the TRIM and GND pins (Figure 26). The
following equation can be used to determine the value of
Vtrim needed for a desired output voltage Vo:
Vtrim  0.7   Vo  0.7525  0.0667
Vo
Vin
Rtrim = 3.122 kΩ
Rpull-up
ION/OFF
On/Off
RL
Vtrim is the external voltage in V
Vo is the desired output voltage
GND
For example, to program the output voltage of a DNT
module to 3.3 Vdc, Vtrim is calculated as follows
Figure 23: Negative remote On/Off implementation
Vtrim  0.7   2.5475 0.0667
Over-Current Protection
To provide protection in an output over load fault
condition, the unit is equipped with internal over-current
protection. When the over-current protection is
triggered, the unit enters hiccup mode. The units
operate normally once the fault condition is removed.
DS_DNT12SMD05_07182012
7
The amount of power delivered by the module is the
voltage at the output terminals multiplied by the output
current. When using the trim feature, the output voltage
of the module can be increased, which at the same
output current would increase the power output of the
module. Care should be taken to ensure that the
maximum output power of the module must not exceed
the maximum rated power (Vo.set x Io.max ≤ P max).
Vtrim = 0.530V
Voltage Margining
Figure 24: Circuit configuration for programming output voltage
using an external resistor
Figure 25: Circuit Configuration for programming output voltage
Output voltage margining can be implemented in the
DNT modules by connecting a resistor, R margin-up, from
the Trim pin to the ground pin for margining-up the
output voltage and by connecting a resistor, R margin-down,
from the Trim pin to the output pin for margining-down.
Figure 26 shows the circuit configuration for output
voltage margining. If unused, leave the trim pin
unconnected. A calculation tool is available from the
evaluation procedure, which computes the values of
Rmargin-up and Rmargin-down for a specific output voltage and
margin percentage.
using external voltage source
Table 1 provides Rtrim values required for some common
output voltages, while Table 2 provides value of external
voltage source, Vtrim, for the same common output
voltages. By using a 1% tolerance trim resistor, set point
tolerance of ±2% can be achieved as specified in the
electrical specification.
Vin
Vo
Rmargin-down
Q1
On/Off
Trim
Rmargin-up
Rtrim
Q2
GND
Table 1
VO (V)
0.7525
1.2
1.5
1.8
2.5
3.3
5.0
5.5
Rtrim (KΩ)
Open
22.464
13.047
9.024
5.009
3.122
1.472
1.210
Figure 26: Circuit configuration for output voltage margining
Table 2
VO (V)
0.7525
1.2
1.5
1.8
2.5
3.3
5.0
5.5
Vtrim (V)
Open
0.670
0.650
0.630
0.583
0.530
0.4167
0.3840
DS_DNT12SMD05_07182012
8
THERMAL CONSIDERATIONS
THERMAL CURVES
Thermal management is an important part of the
system design. To ensure proper, reliable operation,
sufficient cooling of the power module is needed over
the entire temperature range of the module. Convection
cooling is usually the dominant mode of heat transfer.
+△V
PS1
PS1
PS2
PS2
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
Thermal Testing Setup
Delta’s DC/DC power modules are characterized in
heated vertical wind tunnels that simulate the thermal
environments encountered in most electronics
equipment. This type of equipment commonly uses
vertically mounted circuit cards in cabinet racks in
which the power modules are mounted.
Figure 28: Temperature measurement location
The allowed maximum hot spot temperature is defined at 125℃.
DNT12S0A0S05(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin =12V,Vo=5.0V (Either Orientation)
Output Current (A)
5.0
The following figure shows the wind tunnel
characterization setup. The power module is mounted
on a test PWB and is vertically positioned within the
wind tunnel. The height of this fan duct is constantly
kept at 25.4mm (1’’).
Natural
Convection
4.0
100LFM
3.0
200LFM
Thermal Derating
2.0
Heat can be removed by increasing airflow over the
module. To enhance system reliability, the power
module should always be operated below the maximum
operating temperature. If the temperature exceeds the
maximum module temperature, reliability of the unit
may be affected.
1.0
0.0
50
MODULE
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 29: Output current vs. ambient temperature and air
v[email protected] Vin=12V, Vo=5.0V (Either Orientation)
DNT12S0A0S05(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin =12V,Vo=3.3V (Either Orientation)
PWB
FANCING PWB
55
Output Current (A)
5.0
Natural
Convection
4.0
100LFM
200LFM
3.0
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
2.0
1.0
AIR FLOW
0.0
50
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 30: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vo=3.3V (Either Orientation)
Figure 27: Wind tunnel test setup
DS_DNT12SMD05_07182012
9
DNT12S0A0S05(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin =12V,Vo=2.0V (Either Orientation)
Output Current (A)
5.0
Natural
Convection
4.0
100LFM
3.0
2.0
1.0
0.0
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 31: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vo=2.0V (Either Orientation)
DNT12S0A0S05(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin =12V,Vo=0.75~1.5V (Either Orientation)
Output Current (A)
5.0
Natural
Convection
4.0
100LFM
3.0
2.0
1.0
0.0
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 32: Output current vs. ambient temperature and air
[email protected] Vin=12V, Vo=0.75~1.5V (Either Orientation)
DS_DNT12SMD05_07182012
10
PICK AND PLACE LOCATION
SURFACE- MOUNT TAPE & REEL
LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Peak Temp. 240 ~ 245 ℃
220℃
Ramp down
max. 4℃ /sec.
200℃
150℃
Preheat time
90~120 sec.
Time Limited 75 sec.
above 220℃
Ramp up
max. 3℃ /sec.
25℃
Time
Note: All temperature refers to assembly application board, measured on the land of assembly application board.
DS_DNT12SMD05_07182012
11
MECHANICAL DRAWING
SMD PACKAGE
SIP PACKAGE (OPTIONAL)
DS_DNT12SMD05_07182012
12
PART NUMBERING SYSTEM
DNT
12
S
Product
Series
Numbers of
Input Voltage
Outputs
DNT – 3A
or 5A
04 - 2.4V ~ 5.5V
12 - 8.3V ~ 14V
S - Single
0A0
S
Output
Voltage
Package
Type
0A0 Programmable
R – SIP
S - SMD
05
N
F
Output
On/Off logic
Current
03 -3A
05 -5A
N- Negative
P- Positive
A
Option Code
F- RoHS 6/6
(Lead Free)
A – Standard
Functions
MODEL LIST
Model Name
Package
Input Voltage
Output Voltage
Output Current
Efficiency
12Vin, 5Vout full load
DNT12S0A0S03NFA
SMD
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
3A
93.0%
DNT12S0A0R03NFA
SIP
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
3A
92.5%
DNT12S0A0S05NFA
SMD
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
5A
92%
DNT12S0A0S05PFA
SMD
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
5A
92%
DNT12S0A0R05NFA
SIP
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
5A
91%
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +31-20-655-0967
Fax: +31-20-655-0999
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220-6224
Fax: +886 3 4513485
Email: [email protected]
WARRANTY
Delta offers a two (2) year limited warranty. Complete warranty information is listed on our web site or is available
upon request from Delta.
Information furnished by Delta is believed to be accurate and reliable. However, no responsibility is assumed by
Delta for its use, nor for any infringements of patents or other rights of third parties, which may result from its use. No
license is granted by implication or otherwise under
DS_DNT12SMD05_07182012
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