TECHNICAL SPECIFICATIONS DNT04 DS DNT04SMD05
User Manual: DNT04
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DS_DNT04SMD05_07182012
FEATURES
High Efficiency: 93.5%@ 5Vin, 3.3V/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
0.75V to 3.63V 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, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) certified
CE mark meets 73/23/EEC and 93/68/EEC
directive
APPLICATIONS
Telecom/DataCom
Distributed power architectures
Servers and workstations
LAN/WAN applications
Data processing applications
OPTIONS
Positive On/Off logic
SIP package
Delphi DNT04, Non-Isolated Point of Load
DC/DC Power Modules: 2.4~5.5Vin, 0.75~3.63Vo, 5A out
The Delphi Series DNT04, 2.4-5.5V input, 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. The DNT04 series provides a programmable output
voltage from 0.75V to 3.63V using external resistors. This product family
is available in surface mount or SIP package and provides up to 5A of
output current in an industry standard footprint. With creative design
technology and optimization of component placement, these converters
possess outstanding electrical and thermal performance, as well as
extremely high reliability under highly stressful operating conditions.
The DNT04, 5A modules have excellent thermal performance and can
provide full output current at up to 85℃ ambient temperature with no
airflow.
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TECHNICAL SPECIFICATIONS
(TA = 25°C, airflow rate = 300 LFM, Vin = 5Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
DNT04S0A0S05NFA
Min.
Typ.
Max.
Units
ABSOLUTE MAXIMUM RATINGS
Input Voltage (Continuous)
0
5.8
Vdc
Operating Temperature
-40
85
°C
Storage Temperature
-55
125
°C
INPUT CHARACTERISTICS
Operating Input Voltage
Vo ≦ Vin –0.5V
2.4
5.5
V
Input Under-Voltage Lockout
Turn-On Voltage Threshold
2.05
V
Turn-Off Voltage Threshold
1.90
V
Maximum Input Current
Vin=4.5V Vo=3.3V, Io=Io, max
4.1
A
No-Load Input Current
30
45
mA
Off Converter Input Current
2
mA
Inrush Transient
Vin=2.4V to 5.5V, Io=Io, min to Io, max
0.1
A2S
Recommended Input Fuse
5
A
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Vin=5V, Io=Io, max
-2.5
Vo,set
+2.5
% Vo,set
Output Voltage Adjustable Range
0.7525
3.63
V
Output Voltage Regulation
Over Line
Vin=2.4V to 5.5V
0.2
% Vo,set
Over Load
Io=Io, min to Io, max
0.2
% Vo,set
Over Temperature
Ta=-40℃ to 85℃
0.4
% Vo,set
Total Output Voltage Range
Over sample load, line and temperature
-3.0
+3.0
% Vo,set
Output Voltage Ripple and Noise
5Hz to 20MHz bandwidth
Peak-to-Peak
Full Load, 1µF ceramic, 10µF tantalum
30
50
mV
RMS
Full Load, 1µF ceramic, 10µF tantalum
10
15
mV
Output Current Range
0
5
A
Output Voltage Over-shoot at Start-up
1
% Vo,set
Output DC Current-Limit Inception
200
% Io
Output Short-Circuit Current (Hiccup Mode)
Io, s/c
2.2
Adc (rms)
DYNAMIC CHARACTERISTICS
Dynamic Load Response
10µF Tantalum & 1µF Ceramic load cap, 2.5A/µs
Positive Step Change in Output Current
50% Io, max to 100% Io, max
100
mV
Negative Step Change in Output Current
100% Io, max to 50% Io, max
100
mV
Setting Time to 10% of Peak Devitation
25
µs
Turn-On Transient
Io=Io.max
Start-Up Time, From On/Off Control
Von/off, Vo=10% of Vo,set
8.5
ms
Start-Up Time, From Input
Vin=Vin, min, Vo=10% of Vo,set
8.5
ms
Maximum Output Startup Capacitive Load
Full load; ESR ≧1mΩ
1000
µF
Full load; ESR ≧10mΩ
3000
µF
EFFICIENCY
Vo=3.3V
Vin=5V, 100% Load
93.5
%
Vo=2.5V
Vin=5V, 100% Load
91.0
%
Vo=1.8V
Vin=5V, 100% Load
88.5
%
Vo=1.5V
Vin=5V, 100% Load
86.5
%
Vo=1.2V
Vin=5V, 100% Load
83.5
%
Vo=0.75V
Vin=5V, 100% Load
77.0
%
FEATURE CHARACTERISTICS
Switching Frequency
300
kHz
ON/OFF Control, (For Negative logic)
Logic Low Voltage
Module On, Von/off
-0.2
0.3
V
Logic High Voltage
Module Off, Von/off
2.5
Vin.max
V
Logic Low Current
Module On, Ion/off
10
µA
Logic High Current
Module Off, Ion/off
0.2
1
mA
ON/OFF Control, (For Positive logic)
Logic HighVoltage
Module On, Von/off
Vin.max
V
Logic Low Voltage
Module Off, Von/off
-0.2
0.3
V
Logic High Current
Module On, Ion/off
10
µA
Logic Low Current
Module Off, Ion/off
0.2
1
mA
GENERAL SPECIFICATIONS
MTBF
Io=100% of Io, max; Airflow=200LFM, Ta=25°C
19.38
M hours
Weight
2.3
grams
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ELECTRICAL CHARACTERISTICS CURVES
90
91
92
93
94
95
96
1 2 3 4 5
Out put cur r ent (A)
Efficiency (%)
84
86
88
90
92
94
96
1 2 3 4 5
Out put cur r ent (A)
Efficiency (%)
Figure 1: Converter efficiency vs. output current (5Vin/3.3Vout)
Figure 2: Converter efficiency vs. output current (5Vin/2.5Vout)
82
84
86
88
90
92
1 2 3 4 5
Out put cur r ent ( A)
Efficiency (%)
80
82
84
86
88
90
92
1 2 3 4 5
Out put cur r ent (A)
Efficiency (%)
Figure 3: Converter efficiency vs. output current (5Vin/1.8Vout)
Figure 4: Converter efficiency vs. output current (5Vin/1.5Vout)
78
80
82
84
86
88
90
1 2 3 4 5
Out put cur r ent ( A)
Efficiency (%)
74
76
78
80
82
84
86
1 2 3 4 5
Out put cur r ent ( A)
Efficiency (%)
Figure 5: Converter efficiency vs. output current (5Vin/1.2Vout)
Figure 6: Converter efficiency vs. output current (5Vin/0.75Vout)
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 7: Output ripple & noise at 5Vin, 3.3V/5A out
Figure 8: Output ripple & noise at 5Vin, 2.5V/5A out
Figure 9: Output ripple & noise at 5Vin, 1.8V/5A out
Figure 10: Output ripple & noise at 5Vin, 1.5V/5A out
Figure 11: Output ripple and noise at 5Vin, 1.2V/5A out
Figure 12: Output ripple and noise , 0.75V/5A out
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ELECTRICAL CHARACTERISTICS CURVES (CON.)
Figure 13: Turn on delay time at 5Vin, 3.3V/5A out
Top: Vout, 2V/div, Bottom: Vin, 2V/div; 2mS/div
Figure 14: Turn on delay time at 5Vin, 2.5V/5A out
Top: Vout, 2V/div, Bottom: Vin, 2V/div; 2mS/div
Figure 15: Turn on delay time at 5Vin, 1.8V5A out
Top: Vout, 2V/div, Bottom: Vin, 2V/div; 2mS/div
Figure 16: Turn on delay time at 5Vin, 1.5V/5A out
Top: Vout, 2V/div, Bottom: 2V/div; 2mS/div
Figure 17: Turn on delay time at 5Vin, 1.2V/5A out
Top: Vout , 2V/div, Bottom :Vin, 2V/div; 2mS/div
Figure 18: Turn on delay time at 5Vin, 0.75V/5A out
Top: Vout, 0.5V/div, Bottom: Vin , 2V/div; 2mS/div
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ELECTRICAL CHARACTERISTICS CURVES
Figure 19: Typical transient response to step load change at
2.5A/μS from 100% to 50% of Io, max at 5Vin, 3.3Vout
(Cout = 1uF ceramic, 10μF tantalum)
(100mV/div, 10uS/div)
Figure 20: Typical transient response to step load change at
2.5A/μS from 50% to 100% of Io, max at 5Vin, 3.3Vout
(Cout =1uF ceramic, 10μF tantalum)
(100mV/div, 10uS/div)
Figure 21: Output short circuit current 5Vin, 0.75Vout
5A/div, 10mS/div
Figure 22: Turn on with Prebias 5Vin, 3.3V/0A out, Vbias =1.0Vdc
2V/div, 10mS/div
Vbias=1V
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TEST CONFIGURATIONS
VI(+)
VI(-)
BATTERY
2
100uF
Tantalum
L
Note: Input reflected-ripple current is measured with a
simulated source inductance. Current is measured at the input
of the module.
Figure 23: Input reflected-ripple test setup
Vo
GND
10uF
tantalum 1uF
ceramic SCOPE Resistive
Load
Note: Use a 10μF tantalum and 1μF capacitor. Scope
measurement should be made using a BNC connector.
Figure 24: Peak-peak output noise and startup transient
measurement test setup.
VIVo
GND
Figure 25: 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.
%100)(
IiVi
IoVo
DESIGN CONSIDERATIONS
Input Source Impedance
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.
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 an
adequate time-delay fuse in the ungrounded lead.
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FEATURES DESCRIPTIONS
Remote On/Off
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 26).
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 27). 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)
Vo
O n/O ff
V in
GND
Q1
RL
IO N /O F F
Figure 26: Positive remote On/Off implementation
Vo
On/Off
Vin
GND
Q1
RL
Rpull-
up
ION /O FF
Figure 27: Negative remote On/Off implementation
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.
FEATURES DESCRIPTIONS (CON.)
Output Voltage Programming
The output voltage of the DNT can be programmed to any
voltage between 0.75Vdc and 3.63Vdc by connecting one
resistor (shown as Rtrim in Figure 28) 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:
5110
7525.0
21070
Vo
Rtrim
For example, to program the output voltage of the DNT
module to 1.8Vdc, Rtrim is calculated as follows:
KRtrim 155110
7525.08.1
21070
DNT can also be programmed by apply a voltage
between the TRIM and GND pins (Figure 29). The
following equation can be used to determine the value of
Vtrim needed for a desired output voltage Vo:
7525.01698.07.0 VoVtrim
For example, to program the output voltage of a DNT
module to 3.3 Vdc, Vtrim is calculated as follows
VVtrim 267.07525.03.31698.07.0
Vo
TRIM
GND
RLoad
Rtrim
Figure28: Circuit configuration for programming output voltage
using an external resistor
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FEATURE DESCRIPTIONS (CON.)
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.
Table 1
VO (V)
Rtrim (KΩ)
0.7525
Open
1.2
41.973
1.5
23.077
1.8
15.004
2.5
6.947
3.3
3.160
3.63
2.212
Table 2
VO (V)
Vtrim (V)
0.7525
Open
1.2
0.6240
1.5
0.5731
1.8
0.5221
2.5
0.4033
3.3
0.2674
3.63
0.2114
Vo
TRIM
GND
RLoad
Vtrim
+
_
Figure 29: Circuit Configuration for programming output voltage
using external voltage source
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).
Voltage Margining
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, Rmargin-down, from the Trim pin
to the output pin for margining-down. Figure 32 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 R margin-up and Rmargin-down for a specific output
voltage and margin percentage.
Vo
On/Off
Vin
GND
Trim
Q2
Q1
Rmargin-up
Rmargin-down
Rtrim
Figure 30: Circuit configuration for output voltage margining
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THERMAL CONSIDERATIONS
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.
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.
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’’).
Thermal Derating
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.
AIR FLOW
MODULE
PWB
50.8(2.00")
AIR VELOCITY
AND AMBIENT
TEMPERATURE
SURED BELOW
THE MODULE
FANCING PWB
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 31: Wind tunnel test setup
THERMAL CURVES
Figure 32: Temperature measurement location
The allowed maximum hot spot temperature is defined at 125
℃
DNT04S0A0S05(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin =5V,Vo=0.75V~3.3V (Either Orientation)
0.0
1.0
2.0
3.0
4.0
5.0
50 55 60 65 70 75 80 85
Natural
Convection
Ambient Temperature (℃)
Output Current (A)
Figure 33: Derating curves, output current vs. ambient
temperature and air velocity @ Vin=5V, Vout=0.75V~3.3V (Either
Orientation)
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PICK AND PLACE LOCATION SURFACE- MOUNT TAPE & REEL
LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Time
150℃
200℃
90~120 sec.
Time Limited 75 sec.
above 220℃
220℃
Preheat time
Ramp up
max. 3℃/sec.
Ramp down
max. 4℃/sec.
Peak Temp. 240 ~ 245 ℃
25℃
Note: All temperature refers to assembly application board, measured on the land of assembly application board.
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MECHANICAL DRAWING
SMD PACKAGE SIP PACKAGE (OPTIONAL)
DS_DNT04SMD05_07182012
13
PART NUMBERING SYSTEM
DNT
04
S
0A0
S
05
N
F
A
Product
Series
Input Voltage
Numbers
of Outputs
Output
Voltage
Package
Type
Output
Current
On/Off logic
Option Code
DNT- 3A/5A
04 - 2.4V~5.5V
S - Single
0A0 -
Programmable
R - SIP
S - SMD
03 - 3A
05 - 5A
N - Negative
P - Positive
F- RoHS 6/6
(Lead Free)
A - Standard Function
MODEL LIST
Model Name
Package
Input Voltage
Output Voltage
Output Current
Efficiency
5Vin, 3.3Vdc full load
DNT04S0A0S03NFA
SMD
2.4V ~ 5.5Vdc
0.75V ~ 3.63Vdc
3A
93.0%
DNT04S0A0R03NFA
SIP
2.4V ~ 5.5Vdc
0.75V ~ 3.63Vdc
3A
94.0%
DNT04S0A0S05NFA
SMD
2.4V ~ 5.5Vdc
0.75V ~ 3.63Vdc
5A
93.5%
DNT04S0A0R05NFA
SIP
2.4V ~ 5.5Vdc
0.75V ~ 3.63Vdc
5A
93.0%
CONTACT: www.deltaww.com/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
Fax: (978) 656 3964
Email: DCDC@delta-corp.com
Europe:
Telephone: +31-20-655-0967
Fax: +31-20-655-0999
Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107 x6220~6224
Fax: +886 3 4513485
Email: DCDC@delta.com.tw
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 any patent or patent rights of Delta. Delta reserves the right to revise these
specifications at any time, without notice.
