DELTA S36SA3R308NRFA

FEATURES
High efficiency: 88.5% @ 3.3V/8A
Size: 47.20mmx29.5mmx8.15mm
(1.86”x1.16”x0.32”)
Wide input voltage range: 18V~60V
Standard footprint
Surface mountable
Industry standard pin out
Fixed frequency operation
Input UVLO, OVLO, Output OCP, OVP,
OTP
No minimum load required
ISO 9001, TL 9000, ISO 14001,
QS9000, OHSAS18001 certified
manufacturing facility
UL/cUL 60950 (US & Canada)
recognized, and TUV (EN60950) certified
CE mark meets 73/23/EEC and
93/68/EEC directive
Delphi Series S36SA, 25W Family
DC/DC Power Modules: 18Vin to 60Vin, 3.3V/8A out
OPTIONS
Positive On/Off logic
The Delphi Series S36SA, surface mountable, single output, isolated
DC/DC converter, is the latest offering from a world leader in power
systems technology and manufacturing – Delta Electronics, Inc. This
product family provides up to 25 watts of power or up to 8A of output
current in an industry standard footprint. With creative design technology
and optimization of component placement, the Delphi Series Small
Power converters possess outstanding electrical and thermal
performance, as well as extremely high reliability under highly stressful
operating conditions. All models are protected from abnormal
input/output voltage and current conditions.
APPLICATIONS
Telecom/DataCom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_S36SA3R308_04062006
Delta Electronics, Inc.
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
S36SA3R308NRFA
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Transient (100ms)
Operating Temperature
Storage Temperature
Input/Output Isolation Voltage
INPUT CHARACTERISTICS
Operating Input Voltage
Input Under-Voltage Lockout
Turn-On Voltage Threshold
Turn-Off Voltage Threshold
Lockout Hysteresis Voltage
Maximum Input Current
No-Load Input Current
Off Converter Input Current
Inrush Current(I2t)
Input Reflected-Ripple Current
Input Voltage Ripple Rejection
OUTPUT CHARACTERISTICS
Output Voltage Set Point
Output Voltage Regulation
Over Load
Over Line
Over Temperature
Total Output Voltage Range
Output Voltage Ripple and Noise
Peak-to-Peak
RMS
Operating Output Current Range
Output DC Current-Limit Inception
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient
Positive Step Change in Output Current
Negative Step Change in Output Current
Settling Time (within 1% Vout nominal)
Turn-On Transient
Start-Up Time, From On/Off Control
Start-Up Time, From Input
Maximum Output Capacitance
EFFICIENCY
100% Load
100% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, (Logic Low-Module ON)
Logic Low
Logic High
ON/OFF Current
Leakage Current
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
100ms
Refer to Figure 13 for measuring point
1 minute
Typ.
Max.
Units
65
100
100
125
Vdc
Vdc
°C
°C
Vdc
60
Vdc
18
17
2
2.1
100
10
1
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
3.30
3.35
Vdc
±3
±3
±15
±12
±10
3.44
mV
mV
mV
mV
50
10
100
30
8
150
mV
mV
A
%
80
80
200
200
200
mV
mV
us
6
7
15
15
3000
ms
ms
µF
-40
-55
1500
18
16
15
0.7
17
16
1.5
100% Load, 18Vin
45
4
0.003
15
50
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25C
Io=Io,min to Io,max
Vin=18V to60V
Tp=-40°C to 100°C
over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
Output Voltage 10% Low
3.25
3.16
0
110
48V, 10µF Tan & 1µF Ceramic load cap, 1A/µs
50% Io,max to 100% Io,max
100 % Io,max to 50% Io,max
Full load; 5% overshoot of Vout at startup
Vin=48V
Vin=24V
86.5
87.5
88.5
89.5
%
%
1500
Vdc
MΩ
PF
350
kHz
1500
100
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
Ion/off at Von/off=0.0V
Logic High, Von/off=15V
Across Pins 9 & 5, Pout ≦ max rated power
Pout ≦ max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Tc=40°C
Refer to Figure 13 for measuring point
2
-10
115
122
5.8
16.9
105
0.7
18
1
50
10
10
135
V
V
mA
uA
%
%
%
Mhour
grams
°C
2
ELECTRICAL CHARACTERISTICS CURVES
4.5
90
POWER DISSIPATION (W)
4.0
EFFICIENCY (%)
80
70
18Vin
24Vin
60
3.5
3.0
2.5
2.0
18Vin
48Vin
24Vin
60Vin
1.5
48Vin
60Vin
1.0
50
1
2
3
4
5
6
7
8
OUTPUT CURRENT (A)
1
2
3
4
5
6
7
8
OUTPUT CURRENT (A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C.
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
2.2
2
Io=8A
Io=4.8A
1.8
Io=0.8A
input current (A)
1.6
1.4
1.2
1
0.8
0.6
0.4
0.2
0
10
15
20
25
30
35
40
45
50
55
60
input voltage (V)
Figure 3: Typical input characteristics at 25°C.
Figure 4: Turn-on transient at full load current (Constant
resistance mode) (1 ms/div). Vin: 48V; Top Trace: Vout
(1V/div); Bottom Trace: ON/OFF Control (5V/div).
3
ELECTRICAL CHARACTERISTICS CURVES
Figure5: Turn-on transient at zero load current (Constant
resistance mode) (1 ms/div). Vin: 48V; Top Trace: Vout
(1V/div); Bottom Trace: ON/OFF Control (5V/div).
Figure 6: Output voltage response to step-change in load
current (50%-100% of Io, max; di/dt = 1A/µs). Load cap: 10µF,
100 mΩ ESR tantalum capacitor and 1µF ceramic capacitor.
Top Trace: Vout (50mV/div, 100 us/div), Bottom Trace: Iout
(2.42A/div).
is
TEST
12uH
Cs:68uF/100V
ESR< 0.3Ω
﹫
20℃100KHz
Vi(+)
68uF/100V
ESR< 0.3Ω
﹫
20℃100KHz
Vi(-)
Figure 7: Output voltage response to step-change in load
current (100%-50% of Io, max; di/dt = 1A/µs). Load cap: 10µF,
100 mΩESR tantalum capacitor and 1µF ceramic capacitor.
Top Trace: Vout (50mV/div, 100 us/div), Bottom Trace: Iout
(2.42A/div).
Figure 8: Test set-up diagram showing measurement points
for Input Reflected Ripple Current (Figure 9).
Note: Measured input reflected-ripple current with a simulated
source Inductance (LTEST) of 12 µH. Capacitor Cs offset
possible battery impedance.
4
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
10u
SCOPE
1u
RESISTIVE
LOAD
Vo(-)
Figure 9: Input reflected ripple current, is, at full rated output
current and nominal input voltage with 12µH source impedance
and 68µF electrolytic capacitor (20 mA/div).
Figure 10: Output voltage noise and ripple measurement test
setup. Scope measurement should be made using a BNC
cable (length shorter than 20 inches). Position the load
between 51 mm to 76 mm (2 inches to 3 inches) from the
module.
3.5
3
OUTPUT VOLTAGE (V)
2.5
2
1.5
1
0.5
48V
0
0
Figure 11: Output voltage ripple at nominal input voltage and
rated load current (20 mV/div). Load capacitance: 1µF ceramic
capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz.
2
4
6
8
10
12
LOAD CURRENT (A)
Figure 12: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
5
THERMAL DERATING CURVE
Hot spot
S36SA3R308NR A Output Load vs. Ambient Temperature and Air Velocity
(De-rating Curve, Either Orientation, no heatsink)
Output Current(A)
9
600LFM
8
500LFM
7
Natural
Convection
6
400LFM
5
100LFM
4
150LFM
3
200LFM
2
300LFM
1
0
55
Figure 13: Hot spot location
60
65
70
75
80
85
90
95
Ambient Temperature (℃)
Figure 14: Output current vs. ambient temperature and air
velocity (Either Orientation)
6
DESIGN CONSIDERATION
Input Source Impedance
The impedance of the input source connecting to the
DC/DC power modules will interact with the modules
and affect the stability. A low ac-impedance input
source is recommended. If the source inductance is
more than a few µH, we advise adding a 10 to 100 µF
electrolytic capacitor (ESR < 0.7 Ω at 100 kHz)
mounted close to the input of the module to improve the
stability.
Layout and EMC Considerations
Delta’s DC/DC power modules are designed to operate
in a wide variety of systems and applications. For
design assistance with EMC compliance and related
PWB layout issues, please contact Delta’s technical
support team. An external input filter module is
available for easier EMC compliance design.
Application notes to assist designers in addressing
these issues are pending release.
This power module is not internally fused. To achieve
optimum safety and system protection, an input line
fuse is highly recommended. The safety agencies
require a normal-blow fuse with 5A maximum rating to
be installed in the ungrounded lead. A lower rated fuse
can be used based on the maximum inrush transient
energy and maximum input current.
Soldering and Cleaning Considerations
Post solder cleaning is usually the final board assembly
process before the board or system undergoes
electrical testing. Inadequate cleaning and/or drying
may lower the reliability of a power module and
severely affect the finished circuit board assembly test.
Adequate cleaning and/or drying is especially important
for un-encapsulated and/or open frame type power
modules. For assistance on appropriate soldering and
cleaning procedures, please contact Delta’s technical
support team.
Safety Considerations
The power module must be installed in compliance with
the spacing and separation requirements of the enduser’s safety agency standard if the system in which the
power module is to be used must meet safety agency
requirements.
When the input source is 60Vdc or below, the power
module meets SELV (safety extra-low voltage)
requirements. If the input source is a hazardous voltage
which is greater than 60 Vdc and less than or equal to
75 Vdc, for the module’s output to meet SELV
requirements, all of the following must be met:
The input source must be insulated from any
hazardous voltages, including the ac mains, with
reinforced insulation.
One Vi pin and one Vo pin are grounded, or all the
input and output pins are kept floating.
The input terminals of the module are not operator
accessible.
A SELV reliability test is conducted on the system
where the module is used to ensure that under a
single fault, hazardous voltage does not appear at
the module’s output.
Do not ground one of the input pins without grounding
one of the output pins. This connection may allow a nonSELV voltage to appear between the output pin and
ground.
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7
FEATURES DESCRIPTIONS
Over-Current Protection
The modules include an internal output over-current
protection circuit, which will endure current limiting for
an unlimited duration during output overload. If the
output current exceeds the OCP set point, the modules
will automatically shut down (hiccup mode).
If the external resistor is connected between the TRIM and
Vo- pins, the output voltage set point decreases. The
external resistor value required to obtain a percentage of
output voltage change △Vo% is defined as:
Rtrim − down =
511
− 6.11[ΚΩ ]
∆%
Ex. When trim-down –10% (3.3V X 0.9 = 2.97V)
The modules will try to restart after shutdown. If the
overload condition still exists, the module will shut down
again. This restart trial will continue until the overload
condition is corrected.
Rtrim − down =
511
− 6.11 = 44.99[ΚΩ ]
10
Over-Voltage Protection
The modules include an internal output over-voltage
protection circuit, which monitors the voltage on the
output terminals. If this voltage exceeds the overvoltage set point, the module will shut down (Hiccup
mode). The modules will try to restart after shutdown. If
the fault condition still exists, the module will shut down
again. This restart trial will continue until the fault
condition is corrected.
Figure 16: Circuit configuration for trim-up (increase output
voltage)
Over-Temperature Protection
The over-temperature protection consists of circuitry
that provides protection from thermal damage. If the
temperature exceeds the over-temperature threshold
the module will shut down.
The module will try to restart after shutdown. If the overtemperature condition still exists during restart, the
module will shut down again. This restart trial will
continue until the temperature is within specification.
If the external resistor is connected between the TRIM and
Vo the output voltage set point increases. The external
resistor value required to obtain a percentage output
voltage change △Vo% is defined as:
Rtrim − up =
Ex. When trim-up +10% (3.3V X 1.1 = 3.63V)
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point, the
modules may be connected with an external resistor
between the TRIM pin and either the Vo+ or Vo -. The
TRIM pin should be left open if this feature is not used.
5.11 * Vo * ( 100 + ∆%) 511
−
− 6.11[ΚΩ ]
1.225 * ∆%
∆%
Rtrim − up =
5.11* 3.3 * ( 100 + 10 ) 511
−
− 6.11 = 94.21[ΚΩ ]
1.225 * 10
10
Care should be taken to ensure that the maximum output
power of the module remains at or below the maximum rated
power.
Figure 15: Circuit configuration for trim-down (decrease output
voltage)
9
THERMAL CONSIDERATIONS
FEATURES DESCRIPTIONS
(CONTINUED)
Remote ON/OFF
The remote on/off feature on the module can be either
negative or positive logic. Negative logic turns the
module on during a logic low and off during a logic high.
Positive logic turns the modules on during a logic high
and off during a logic low. Remote on/off can be
controlled by an external switch between the on/off
terminal and the Vi(-) terminal. The switch can be an
open collector or open drain. If the remote on/off feature
is not used, please short the on/off pin to Vi(-) for
negative logic and let the pin open for positive logic.
Vi(+)
Vo(+)
ON/OFF Trim
Vi(-)
Vo(-)
Figure 17: Circuit configuration for remote ON/OFF
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 space between the neighboring PWB
and the top of the power module or a heat sink is
6.35mm (0.25”).
Thermal Derating
Heat can be removed by increasing airflow over the
module. Figure 13 and 14 show maximum output is a
function of ambient temperature and airflow rate. The
module’s highest hot spot temperature is +120°C. 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
50.8 (2.0”)
AIR FLOW
10 (0.4”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 18: Wind tunnel test setup
10
MECHANICAL DRAWING
Pin No.
1
2
3
6
7
8
10
11
12
Name
+Vout
-Vout
NC
Trim
NC
ON/OFF
NC
-Vin
+Vin
Function
Positive output voltage
Negative output voltage
No Connection
Output voltage trim
No Connection
ON/OFF Logic
No Connection
Negative input voltage
Positive input voltage
11
PART NUMBERING SYSTEM
S
Form
Factor
S- Small
Power
36
S
Input Number of
Voltage Outputs
18~60V
S- Single
A
Product
Series
3R3
Output
Voltage
08
Output
Current
N
ON/OFF
Logic
R
Pin Type
A- Advanced
3R3- 3.3V
08- 8.0A
N- Negative
P- Positive
R- SMD
F
A
Option
Code
Space-RoHS 5/6 A- Standard
F- RoHS 6/6
(Lead Free)
MODEL LIST
MODEL NAME
S36SA3R308NRFA
INPUT
18V~60V
OUTPUT
2.1A
3.3V
EFF @ 100% LOAD
8.0A
88.5%
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 any patent or patent rights of Delta. Delta reserves the right to revise
these specifications at any time, without notice.
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14