DELTA L36SA3R315NRFA

FEATURES
High Efficiency: 87.5% @ 12V/4A
Size: 49.6mm x 39.4mm x 8.9mm
(1.95”x1.55”x0.35”)
Industry standard pin out
Fixed frequency operation
Input UVLO, OTP, Output OCP, OVP, (auto
recovery)
Pre-bias start up
2250V isolation and basic insulation
No minimum load required
4:1 Input voltage range
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
directives
Delphi Series L36SA, 2 x 1.6, 50W Family
DC/DC Power Module: 18~75V in, 12V/4A out
The Delphi Series L36SA, 2” x 1.6”, 18~75V input, single output, isolated
DC/DC converter is the latest offering from a world leader in power
systems technology and manufacturing - Delta Electronics, Inc. This
L36SA series provides up to 50 watts of power or 15A of output current
(3.3V) in an industry standard 2” x 1.6” form factor and pinout. The Delphi
L36SA series operates from a wide 18~75V (4:1) input voltages. With
creative design technology and optimization of component placement,
these converters possess outstanding electrical and thermal
performances, as well as extremely high reliability under highly stressful
operating conditions. All models are fully protected from abnormal
input/output voltage, current, and temperature conditions. The Delphi
Series converters meet all safety requirements with basic insulation. An
optional heat spreader is available for extended operation.
OPTIONS
Positive On/Off logic
Sense
Heat Spreader
Heatsink
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
Server and Data Storage
Industrial/Test Equipment
DATASHEET
DS_L36SA12004_02142007
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
L36SA12004 (Standard)
Min.
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous
Maximum input voltage
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 over current protection
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
60% Load
ISOLATION CHARACTERISTICS
Input to Output
Isolation Resistance
Isolation Capacitance
FEATURE CHARACTERISTICS
Switching Frequency
ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On)
Logic High (Module Off)
ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off)
Logic High (Module On)
ON/OFF Current (for both remote on/off logic)
Leakage Current (for both remote on/off logic)
Output Voltage Trim Range
(Across Pins 9 & 5, Pout ≦ max rated power)
Output Voltage Remote Sense Range (option)
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_L36SA12004_02142007
Refer to Figure21 for measuring point
Typ.
-40
-55
18
16
15
0.75
17
16
1
100% Load, 18Vin
Max.
Units
80
100
130
125
2250
Vdc
Vdc
°C
°C
Vdc
75
Vdc
18
17
1.5
4
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
60
4
1
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=48V, Io=Io.max, Tc=25°C
Io=Io,min to Io,max
Vin=18V to 75V
Ta=-40°C to 85°C
Over sample load, line and temperature
5Hz to 20MHz bandwidth
Full Load, 1µF ceramic, 10µF tantalum
Full Load, 1µF ceramic, 10µF tantalum
20
60
11.880
12.000
12.120
Vdc
±5
±5
±30
±10
±10
12.18
mV
mV
mV
V
100
30
4
150
mV
mV
A
%
11.82
50
15
0
110
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
100
100
200
mV
mV
us
8
8
ms
ms
µF
Full load; 5% overshoot of Vout at startup
470
86
88
%
%
2250
1500
Vdc
MΩ
pF
300
kHz
100
Von/off at Ion/off=1.0mA
Von/off at Ion/off=0.0 µA
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
Vin = 18V ~ 60V
Vin = 61V ~ 75V
Pout ≦ max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; Ta=25°C
Refer to Figure21 for measuring point
0.7
18
V
V
0.7
18
1
50
10
10
10
14.4
V
V
mA
uA
%
%
%
V
2.98
24.2
136
M hours
Grams
°C
2
2
-10
-5
2
ELECTRICAL CHARACTERISTICS CURVES
9
90
70
24Vin
1.5
5
24Vin
2
18Vin
2
50
1
48Vin
3
75Vin
0.5
7
4
48Vin
60
75Vin
6
18Vin
LOSS (W)
EFFICIENCY (%
80
8
2.5
3
3.5
4
OUTPUT CURRENT (A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
1
0.5
1
1.5
2
2.5
3
3.5
4
OUTPUT CURRENT (A)
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
INPUT CURRENT(A
3. 3
3
2. 7
2. 4
2. 1
1. 8
1. 5
1. 2
0. 9
0. 6
0. 3
0
16 21 26 31 36 41 46 51 56 61 66 71
I NPUT VOLTAGE( V)
Figure 3: Typical full load input characteristics at room
temperature
DS_L36SA12004_02142007
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at full rated load current (resistive
load) (5 ms/div). Vin=48V.Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
Figure 5: Turn-on transient at zero load current (5 ms/div).
Vin=48V.Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,
5V/div
For Positive Remote On/Off Logic
Figure 6: Turn-on transient at full rated load current (resistive
load) (5 ms/div). Vin=48V.Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
DS_L36SA12004_02142007
Figure 7: Turn-on transient at zero load current (5 ms/div).
Vin=48V.Top Trace: Vout, 5V/div, Bottom Trace: ON/OFF input,
5V/div
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap:
10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace:
Vout (100mV/div,500us/div), Bottom Trace: I out (2A/div).
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..
Figure 9: Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 2.0A/µs). Load cap:
330µF, 35mΩ ESR solid electrolytic capacitor and 1µF ceramic
capacitor. Top Trace: Vout (100mV/div, 500us/div), Bottom
Trace: I out (2A/div). 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.
Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Note: Measured input reflected-ripple current with a simulated
source Inductance (LTEST) of 12 µH. Capacitor Cs offset
possible battery impedance. Measure current as shown above
DS_L36SA12004_02142007
5
ELECTRICAL CHARACTERISTICS CURVES
0
0
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (500 mA/div, 2us/div).
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at nominal input voltage and rated load current
(20 mA/div, 2us/div).
Copper Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 13: Output voltage noise and ripple measurement test
setup
DS_L36SA12004_02142007
6
ELECTRICAL CHARACTERISTICS CURVES
Output voltage (V)
out put cur r ent r ange
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
2.5
5
Out put cur r ent ( A)
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=4A)(20 mV/div, 2us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz. Scope measurements 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.
DS_L36SA12004_02142007
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
7
DESIGN CONSIDERATIONS
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
to release.
Safety Considerations
The power module must be installed in compliance with
the spacing and separation requirements of the
end-user’s safety agency standard, i.e., UL60950,
CAN/CSA-C22.2 No. 60950-00 and EN60950: 2000 and
IEC60950-1999, if the system in which the power module
is to be used must meet safety agency requirements.
Basic insulation based on 75 Vdc input is provided
between the input and output of the module for the
purpose of applying insulation requirements when the
input to this DC-to-DC converter is identified as TNV-2 or
SELV. An additional evaluation is needed if the source
is other than TNV-2 or SELV.
When the input source is SELV circuit, 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:
DS_L36SA12004_02142007
The input source must be insulated from the ac
mains by reinforced or double insulation.
The input terminals of the module are not
operator accessible.
If the metal baseplate is grounded, one Vi pin
and one Vo pin shall also be grounded.
A SELV reliability test is conducted on the
system where the module is used, in
combination with the module, to ensure that
under a single fault, hazardous voltage does not
appear at the module’s output.
When installed into a Class II equipment (without
grounding), spacing consideration should be given
to the end-use installation, as the spacing between
the module and mounting surface have not been
evaluated.
The power module has extra-low voltage (ELV)
outputs when all inputs are ELV.
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 10A
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 are
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.
8
FEATURES DESCRIPTIONS
Vi(+)
Over-Current Protection
Sense(+)
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).
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.
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 over-voltage
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.
Vo(+)
ON/OFF
Sense(-)
Vi(-)
Vo(-)
Figure 16: Remote on/off implementation
Remote Sense
Remote sense compensates for voltage drops on the
output by sensing the actual output voltage at the point
of load. The voltage between the remote sense pins
and the output terminals must not exceed the output
voltage sense range given here:
[Vo(+) – Vo(–)] – [SENSE(+) – SENSE(–)] ≤ 10% × Vout
This limit includes any increase in voltage due to
remote sense compensation and output voltage set
point adjustment (trim).
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
over-temperature condition still exists during restart, the
module will shut down again. This restart trial will
continue until the temperature is within specification.
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 logic high.
Positive logic turns the modules on during logic high and
off during logic low.
Vi(+) Vo(+)
Sense(+)
Sense(-)
Contact
Resistance
Vi(-)
Vo(-)
Contact and Distribution
Losses
Figure 17: Effective circuit configuration for remote sense
operation
If the remote sense feature is not used to regulate the
output at the point of load, please connect SENSE(+) to
Vo(+) and SENSE(–) to Vo(–) at the module.
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.
The output voltage can be increased by both the
remote sense and the trim; however, the maximum
increase is the larger of either the remote sense or the
trim, not the sum of both.
For negative logic if the remote on/off feature is not
used, please short the on/off pin to Vi(-). For positive
logic if the remote on/off feature is not used, please
leave the on/off pin floating.
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power does not exceed the maximum rated
power.
DS_L36SA12004_02142007
9
FEATURES DESCRIPTIONS (CON.)
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
SENSE(+) or SENSE(-). The TRIM pin should be left
open if this feature is not used.
Figure 19: Circuit configuration for trim-up (increase output
voltage)
Figure 18: Circuit configuration for trim-down (decrease
output voltage)
If the external resistor is connected between the TRIM
and SENSE (-) pins, the output voltage set point
decreases (Fig. 18). The external resistor value
required to obtain a percentage of output voltage
change △% is defined as:
Rtrim − down =
511
− 10 .2 (K Ω )
∆
Ex. When Trim-down -10% (12V×0.9=10.8V)
Rtrim − down =
511
− 10 .2 = 40 .9 (K Ω )
10
If the external resistor is connected between the TRIM
and SENSE (+) the output voltage set point increases
(Fig. 19). The external resistor value required to obtain
a percentage output voltage change △% is defined
as:
Rtrim − up =
5 .11Vo (100 + ∆ ) 511
−
− 10 .2 (K Ω )
1.225 ∆
∆
Ex. When Trim-up +10% (12V×1.1=13.2V)
Rtrim − up =
5 .11 × 12 × (100 + 10 ) 511
−
− 10 .2 = 489 (K Ω )
1.225 × 10
10
The output voltage can be increased by both the remote
sense and the trim, however the maximum increase is
the larger of either the remote sense or the trim, not the
sum of both.
When using remote sense and trim, the output voltage
of the module is usually increased, which increases the
power output of the module with the same output
current.
Care should be taken to ensure that the maximum
output power of the module remains at or below the
maximum rated power.
DS_L36SA12004_02142007
10
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 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.
THERMAL CURVES
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 is constantly kept at
6.35mm (0.25’’).
Figure 21: Hot spot temperature measured point
The allowed maximum hot spot temperature is defined at 130℃
*
PWB
FACING PWB
MODULE
L36SA12004(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Either Orientation)
Output Current (A)
4.5
4.0
3.5
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
Natural
Convection
3.0
100LFM
200LFM
2.5
50.8 (2.0”)
AIR FLOW
300LFM
400LFM
2.0
500LFM
1.5
1.0
12.7 (0.5”)
0.5
0.0
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 20: Wind tunnel test setup
Figure 22: Output current vs. ambient temperature and air velocity
@Vin=48V (Either Orientation)
DS_L36SA12004_02142007
11
MECHANICAL DRAWING
OPEN FRAME VERSION
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
NAME
CASE (OPTION)
+VIN
–VIN
NC
ON/OFF
TRIM
–SENSE (OPTION)
–VO
+VO
+SENSE (OPTION)
NC
FUNCTION
CASE
POSITIVE INPUT VOLTAGE
NEGATIVE INPUT VOLTAGE
NOT CONNECTED
REMOTE ON/OFF
OUTPUT VOLTAGE TRIM
NEGATIVE OUTPUT VOLTAGE SENSE
NEGATIVE OUTPUT VOLTAGE
POSITVE OUTPUT VOLTAGE
POSITVE OUTPUT VOLTAGE SENSE
NOT CONNECTED
ALL PINS ARE COPPER WITH TIN PLATING
DS_L36SA12004_02142007
12
PART NUMBERING SYSTEM
L
36
Type of
Product
Input
Voltage
L- 2 x 1.6
Brick
18~75V
S
A
Number of Product
Outputs
Series
S- Single
Advanced
120
04
N
R
Output
Voltage
Output
Current
ON/OFF
Logic
Pin Length
F
120-12.0V
04-4A
N-Negative
P-Positive
R-0.170”
A
Option Code
F- RoHS 6/6
(Lead Free)
A-Standard Functions
B-With sense
MODEL LIST
MODEL NAME
L36SA3R315NRFA
L36SA05010NRFA
L36SA12004NRFA
INPUT
18V~75V
18V~75V
18V~75V
OUTPUT
2.1A
1.9A
1.9A
3.3V
5V
12V
EFF @ 100% LOAD
15A
10A
4A
88%
89%
87.5%
Default remote on/off logic is negative and pin length is 0.170”
For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: (888) 335 8201
West Coast: (888) 335 8208
Fax: (978) 656 3964
Email: DCDC@delta-corp.com
Europe:
Telephone: +41 31 998 53 11
Fax: +41 31 998 53 53
Email: DCDC@delta-es.tw
Asia & the rest of world:
Telephone: +886 3 4526107 x6220
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.
DS_L36SA12004_02142007
13