DELTA DNT12S0A0R05NFA

FEATURES
High Efficiency: 93.0% @ 12Vin, 5.0V/3A 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 (US & Canada) Recognized,
and TUV (EN60950) - pending
CE mark meets 73/23/EEC and 93/68/EEC pending
Delphi series DNT12 Non-Isolated Point of Load
DC/DC Power Modules: 8.3~14Vin, 0.75~5.5Vo, 3A
OPTIONS
The Delphi series DNT12, 8.3V~14V input, 3A single output, non-isolated
Positive on/off logic
point of load DC/DC converters are the latest offering from a world leader
SIP package
in power systems technology and manufacturing -- Delta Electronics, Inc.
The DNT12, 3A 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 3A of current in an
industry standard footprint. With creative design technology and
optimization of component placement, these converters possess
outstanding electrical and thermal performance and extremely high
APPLICATIONS
reliability under highly stressful operating conditions. The DNT12, 3A
Telecom/DataCom
modules have excellent thermal performance and can provide full output
Distributed power architectures
current at up to 85℃ ambient temperature with no airflow.
Servers and workstations
LAN/WAN applications
Data processing applications
PRELIMINARY DATASHEET
DS_DNT12SMD03_06252007
TECHNICAL SPECIFICATIONS
(TA = 25°C, airflow rate = 300 LFM, Vin = 12Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
DNT12S0A0S03NFA
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
DS_DNT12SMD03_06252007
Refer to Figure 28 for measuring point
Typ.
0
-40
-55
8.3
12
Max.
Units
15
+125
+125
Vdc
°C
°C
14
V
7.90
7.70
Vin=8.3V, Vo=5V, Io=3A
Vo=5V
50
2
Vin= Vin,min to Vin,max, Io=Io,min to Io,max
2.2
70
10
0.4
TBD
Vin=12V, Io=Io,max
Vin=Vin,min to Vin,max
Io=Io,min to Io,max
Ta= -40℃ to 85℃
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Vin=min to max, Io=min to max,1µF ceramic, 10µF Tan
Vin=min to max, Io=min to max,1µF ceramic, 10µF Tan
-2.0
0.7525
Vo,set
50
20
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
Io=Io,max, Ta=25℃
+3.0
% Vo,set
% Vo,set
% Vo,set
% Vo,set
200
1.5
200
200
25
mVpk
mVpk
µs
7
7
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
% Vo,set
V
mV
mV
A
% Vo,set
% Io
Adc (rms)
0
Module On, Von/off
Module Off, Von/off
Module On, Ion/off
Module Off, Ion/off
+2.0
5.5
0.3
0.4
0.4
-3.0
V
V
A
mA
mA
A2S
A
80
30
3
1
10
10
1000
3000
ms
ms
µF
µF
72.0
80.0
83.0
85.0
88.0
90.0
93.0
%
%
%
%
%
%
%
300
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
38.29
2.3
M hours
grams
2
96
93
90
87
84
81
78
75
72
Efficiency (%)
Efficiency (%)
ELECTRICAL CHARACTERISTICS CURVES
0.5
1
1.5
2
2.5
95
92
89
86
83
80
77
74
71
3
0.5
1
Output Current (A)
Efficiency (%)
Efficiency(%)
2
2.5
88
86
84
82
80
78
76
74
72
3
0.5
1
Output Current (A)
1.5
2
2.5
3
Output Current (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
88
86
84
82
80
78
76
74
72
82
Efficiency (%)
Efficiency (%)
3
(12V in, 3.3V output voltage)
90
88
86
84
82
80
78
76
74
1.5
2.5
Figure 2: Converter efficiency vs. output current
(12V in, 5V output voltage)
1
2
Output Current (A)
Figure 1: Converter efficiency vs. output current
0.5
1.5
80
78
76
74
72
70
0.5
1.0
1.5
2.0
2.5
Output Current (A)
Figure 5: Converter efficiency vs. output current
(12V in, 1.5V output voltage)
DS_DNT12SMD03_06252007
3.0
0.5
1
1.5
2
2.5
3
Output Current (A)
Figure 6: Converter efficiency vs. output current
(12V in, 1.2V output voltage)
3
ELECTRICAL CHARACTERISTICS CURVES
Figure 7: Output ripple & noise at 12Vin, 5.0V/3A out
pk-pk :45.8mV, rms :17.8mV (50mV/div,2uS/div)
Figure 8: Output ripple & noise at 12Vin, 3.3V/3A out
pk-pk :37.5mV, rms :11.6mV (50mV/div,2uS/div)
Figure 9: Output ripple & noise at 12Vin, 2.5V/3A out
pk-pk:33.3mV, rms:9.4mV (50mV/div, 2uS/div)
Figure 10: Output ripple & noise at 12Vin, 1.2V/3A out
pk-pk: 18.7mV, rms: 3.9mV (50mV/div, 2uS/div)
Figure 11: Turn on delay time at 12Vin, 5.0V/3A out
(5mS/div)
Top trace: Vout, 5V/div; Bottom trace: Vin, 10V/div
DS_DNT12SMD03_06252007
Figure 12: Turn on delay time at Remote On/Off, 5.0V/3A
out (5mS/div).
Top trace: Vout, 5V/div; Bottom trace: On/Off, 5.0V/div.
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 13: Turn on Using Remote On/Off with external
capacitors (Co= 3000 µF), 5.0V/3A out (resistive load)
(5mS/div)
Top trace: Vout, 5V/div; Bottom trace: Vin , 10V/div
Figure 14: Turn on Using Input On/Off with external
capacitors (Co= 3000 µF), 5.0V/3A out (resistive load)
(5mS/div)
Top trace: Vout, 5V/div; Bottom trace: On/Off, 5V/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, 20uS/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,
20uS/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, 1V/div; Bottom trace: Vin, 10V/div
DS_DNT12SMD03_06252007
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
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
1uF
10uF
SCOPE
tantalum ceramic
Resistive
Load
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
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 a
maximum (TBD) A of glass type fast-acting fuse in the
ungrounded lead.
Io
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.
η =(
Vo × Io
) × 100 %
Vi × Ii
DS_DNT12SMD03_06252007
6
FEATURES DESCRIPTIONS
FEATURES DESCRIPTIONS (CON.)
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 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)
RL
GND
Figure 22: Positive remote On/Off implementation
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:
Rtrim = 3.122 kΩ
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
⎛ 10500 − 1000 ⎞ ⋅ Ω
⎝ Vo − 0.7525
⎠
Rtrim := ⎜
⎛ 10500 − 1000 ⎞ ⋅ Ω
⎝ 2.5475
⎠
ION/OFF
On/Off
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:
Rtrim := ⎜
Vo
Vin
Output Voltage Programming
Rpull-up
ION/OFF
On/Off
RL
GND
Figure 23: Negative remote On/Off implementation
Vtrim is the external voltage in V
Vo is the desired output voltage
For example, to program the output voltage of a DNT
module to 3.3 Vdc, Vtrim is calculated as follows
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_DNT12SMD03_06252007
7
FEATURE DESCRIPTIONS (CON.)
FEATURE DESCRIPTIONS (CON.)
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, Rmargin-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 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
Table 1
VO (V)
0.7525
1.2
1.5
1.8
2.5
3.3
5.0
5.5
Q2
GND
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_DNT12SMD03_06252007
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.
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’’).
Figure 28: Temperature measurement location
The allowed maximum hot spot temperature is defined at 125℃.
3.5
DNT12S0A0S03(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 12V,Vo=0.75V~5V (Either Orientation)
Output Current (A)
3.0
Natural
Convection
2.5
2.0
Thermal Derating
1.5
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.
PWB
FACING PWB
MODULE
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
1.0
0.5
0.0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 29:Output current vs. ambient temperature and air
[email protected] Vin=12V, Vo=0.75V ~5.0V (Either Orientation)
50.8 (2.0”)
AIR FLOW
12.7 (0.5”)
25.4 (1.0”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches
Figure 27: Wind tunnel test setup
DS_DNT12SMD03_06252007
9
PICK AND PLACE LOCATION
SURFACE- MOUNT TAPE & REEL
LEAD (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
Temperature (°C )
250
200
150
Ramp-up temp.
0.5~3.0°C /sec.
Peak temp.
2nd Ramp-up temp.
210~230°C 5sec.
1.0~3.0°C /sec.
Pre-heat temp.
140~180°C 60~120 sec.
Cooling down rate <3°C /sec.
100
Over 200°C
40~50sec.
50
0
60
120
Time ( sec. )
180
240
300
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
DS_DNT12SMD03_06252007
10
MECHANICAL DRAWING
SMD PACKAGE
DS_DNT12SMD03_06252007
SIP PACKAGE (OPTIONAL)
11
PART NUMBERING SYSTEM
12
S
0A0
S
Product
Series
Input Voltage
Numbers of
Outputs
Output
Voltage
Package
Type
Output
On/Off logic
Current
R - SIP
03 - 3A
N- Negative
F- RoHS 6/6
05 - 5A
P- Positive
(Lead Free)
DNT - 3A or 04 - 2.4V ~ 5.5V
5A
S - Single
12 - 8.3V ~ 14V
0A0 -
Programmable S - SMD
03
N
DNT
F
A
Option Code
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%
92.5%
DNT12S0A0R03NFA
SIP
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
3A
DNT12S0A0S05NFA
SMD
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
5A
92.0%
DNT12S0A0R05NFA
SIP
8.3V ~ 14Vdc
0.75V ~ 5.5Vdc
5A
91.0%
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: [email protected]
Europe:
Phone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: [email protected]
Asia & the rest of world:
Telephone: +886 3 4526107 ext 6220
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_DNT12SMD03_06252007
12