DELTA E36SR3R320

FEATURES
High efficiency: 88% @ 3.3V/ 20A
Size: 58.4mm x 22.8mm x 9.2mm
(2.30”x0.90”x0.36”)
Industry standard pin out
Fixed frequency operation
Input UVLO, Output OCP, OVP, and OTP
2250V isolation
Basic insulation
No minimum load required
SMD and through-hole versions
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) recognized,
and TUV (EN60950)- pending
CE mark meets 73/23/EEC and 93/68/EECpending
Delphi Series E36SR, Eighth Brick Family
DC/DC Power Modules: 18~75V in, 3.3V/20A out
The Delphi Series E36SR Eighth Brick, 18~75V input, single output,
isolated DC/DC converter is the latest offering from a world leader in
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment
power systems technology and manufacturing — Delta Electronics, Inc.
Server and Data Storage
This product family provides up to 66 watts of power or 20A of output
Industrial/Testing Equipment
current in an industry standard footprint. 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
OPTIONS
temperature conditions. The Delphi Series converters meet all safety
SMT or through-hole versions
requirements with basic insulation.
Positive on/off logic
Short pin lengths available
PRELIMINARY DATASHEET
DS_E36SR3R320_02092007
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER
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
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
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_E36SR3R320_02092007
NOTES and CONDITIONS
100ms
Refer to Figure 21 for measuring point
E36SR3R320 (Standard)
Min.
Typ.
Max.
Units
18
24/48
75
100
122
125
2250
Vdc
Vdc
°C
°C
Vdc
18
24/48
75
Vdc
17.5
16.5
1
18
16
Vdc
Vdc
Vdc
A
mA
mA
A2s
mA
dB
-40
-55
100% Load, 18Vin
No load, 48Vin
100
8
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
Tc=-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
Output Voltage 10% Low
10
1
20
60
3.267
3.300
3.333
Vdc
3.63
mV
mV
mV
V
30
20
140
mV
mV
A
%Io
±1.65
±1.65
TBD
2.97
50
10
0
110
48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
25% Io.max to 50% Io.max
50% Io.max to 25% Io.max
150
150
200
2
10
Full load; 5% overshoot of Vout at startup
2
4.3
mV
mV
us
20
20
5000
Vin=48V; Tc=25°C
88
89
%
%
1500
Vdc
MΩ
pF
300
kHz
2250
10
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
Across Pins 9 & 5, Pout ≦ max rated power
Pout ≦ max rated power
Over full temp range; % of nominal Vout
Io=80% of Io, max; 300LFM @25℃
Bare module without heat-sink
Refer to Figure 21 for measuring point
ms
ms
µF
0
2.4
1.8
18
V
V
0
2.4
1.8
18
1
50
10
10
140
V
V
mA
uA
%
%
%Vo
-10
115
TBD
25
127
M hours
grams
°C
2
ELECTRICAL CHARACTERISTICS CURVES
Efficiency Curves
Power Dissipation Curves
93
12
90
10
Power loss(W)
Efficiency(%)
87
84
81
78
75
18V
24V
48V
75V
72
69
66
63
8
6
18V
24V
48V
75V
4
2
0
0
60
0
2
4
6
8
10
12
14
16
18
20
Output current(A)
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C
2
4
6
8 10 12 14
Output current(A)
16
18
20
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C.
5
Input current (A)
4
3
2
1
0
15
25
35
45
55
65
75
Input voltage (V)
Figure 3: Typical full load input characteristics at room
temperature
DS_E36SR3R320_02092007
3
ELECTRICAL CHARACTERISTICS CURVES
Figure 4: Turn-on transient at full rated load current (CC mode)
(5ms/div). Vin=48V.Top Trace: Vout, 1V/div; Bottom Trace:
ON/OFF input, 5V/div
Figure 5: Turn-on transient at zero load current (5ms/div).
Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: ON/OFF input,
5V/div
Figure 6: Turn-on transient at full rated load current (CC mode)
(5ms/div). Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace:
input voltage, 20V/div
Figure 7: Turn-on transient at zero load current (5ms/div).
Vin=48V.Top Trace: Vout, 2V/div; Bottom Trace: input voltage,
20V/div
DS_E36SR3R320_02092007
4
ELECTRICAL CHARACTERISTICS CURVES
Figure 8: Output voltage response to step-change in load
current (50%-25% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF,
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 100us/div), Bottom Trace: I out (5A/div).
Figure 9: Output voltage response to step-change in load
current (25%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF,
tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout
(100mV/div, 10us/div), Bottom Trace: I out (5A/div).
Figure 10: Test set-up diagram showing measurement points
for Input Terminal Ripple Current and Input Reflected Ripple
Current.
Figure 11: Input Terminal Ripple Current, ic, at 48Vin and 20
output current with 12µH source impedance and 33µF
electrolytic capacitor (500 mA/div, 2us/div).
DS_E36SR3R320_02092007
5
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
10u
1u
SCOPE
RESISTIVE
LOAD
Vo(-)
Figure 12: Input reflected ripple current, is, through a 12µH
source inductor at 48Vin and 20 output current (20 mA/div,
2us/div).
Figure 13: Output voltage noise and ripple measurement test
setup
3.6
Output voltage (V)
3
2.4
1.8
1.2
0.6
18
24
48
75
0
20 20.4 20.8 21.2 21.6 22 22.4 22.8 23.2 23.6 24 24.4 24.8
Output current (A)
Figure 14: Output voltage ripple at 48Vin and rated load
current (Io=20A)(20 mV/div, 2us/div)
Load capacitance: 1µF ceramic capacitor and 10µF tantalum
capacitor. Bandwidth: 20 MHz.
DS_E36SR3R320_02092007
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points.
6
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
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_E36SR3R320_02092007
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 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.
7
FEATURES DESCRIPTIONS
Vi(+)
Vo(+)
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 and latch off. The
over-voltage latch is reset by either cycling the input
power or by toggling the on/off signal for one second.
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.
ON/OFF
Sense(-)
Vi(-)
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).
Vi(+) Vo(+)
Sense(+)
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 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.
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 to floating.
Vo(-)
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.
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 does not exceed the maximum rated
power.
DS_E36SR3R320_02092007
8
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 =
Rtrim − up =
5 .11Vo (100 + ∆ ) 511
−
− 10 .21(K Ω )
∆
1.225 ∆
Ex. When Trim-up +10%(5V×1.1=5.5V)
Rtrim − up =
5 .11 × 3 .3 × (100 + 10 ) 511
−
− 10 .21 = 90 .11(K Ω )
1.225 × 10
10
511
− 10 .21(K Ω )
∆
Ex. When Trim-down -10%(3.3V×0.9=2.97V)
Rtrim − down =
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:
511
− 10 .21 = 40 .89 (K Ω )
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_E36SR3R320_02092007
9
THERMAL CONSIDERATIONS
Thermal Derating
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.
Heat can be removed by increasing airflow over the module.
The hottest point temperature of the module is to be defined.
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.
Hence, the choice of equipment to characterize the
thermal performance of the power module is a wind
tunnel.
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.
E36SR3R320(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 24V (Transverse Orientation)
Output Current (A)
20
Natural
Convection
16
100LFM
PWB
FACING PWB
200LFM
12
300LFM
MODULE
400LFM
8
500LFM
600LFM
4
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
0
25
50.8 (2.0”)
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 22: Output load vs. ambient temperature and air velocity @
Vin=24V(Transverse Orientation)
AIR FLOW
E36SR3R320(standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 48V (Transverse Orientation)
Output Current (A)
20
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 20: Wind tunnel test setup
Natural
Convection
16
100LFM
200LFM
12
300LFM
400LFM
8
500LFM
4
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
Figure 23: Output load vs. ambient temperature and air velocity @
Vin=48V(Transverse Orientation)
DS_E36SR3R320_02092007
10
PICK AND PLACE LOCATION
SURFACE-MOUNT TAPE & REEL
RECOMMENDED PAD LAYOUT (SMD)
DS_E36SR3R320_02092007
11
LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
Temperature (°C )
250
200
150
Ramp-up temp.
0.5~3.0°C /sec.
2nd Ramp-up temp. Peak temp.
1.0~3.0°C /sec. 210~230°C 5sec.
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
Note: The temperature refers to the pin of E36SR, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Peak Temp. 240 ~ 245 ℃
217℃
Ramp down
max. 4℃/sec.
200℃
150℃
Preheat time
100~140 sec.
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of E36SR, measured on the pin +Vout joint.
DS_E36SR3R320_02092007
12
MECHANICAL DRAWING
Surface-mount module
Pin No.
1
2
3
4
5
6
7
8
Name
-Vin
ON/OFF
+Vin
+Vout
+SENSE
TRIM
-SENSE
-Vout
DS_E36SR3R320_02092007
Through-hole module
Function
Negative input voltage
Remote ON/OFF
Positive input voltage
Positive output voltage
Positive remote sense
Output voltage trim
Negative remote sense
Negative output voltage
13
PART NUMBERING SYSTEM
E
36
Type of
Product
Input
Voltage
E- Eighth
Brick
36-18~75V
S
R
Number of Product
Outputs
Series
S - Single
3R3
20
N
R
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/Type
20 -20A
N - Negative
R - 0.170”
R - Regular 3R3 - 3.3V
F
A
Option Code
F - RoHS 6/6 A - Standard Functions
(Lead Free)
MODEL LIST
MODEL NAME
INPUT
OUTPUT
EFF @ 100% LOAD
E36SR3R320NRFA
18V~75V
4.3A
3.3V
20A
88%
E36SR05015NRFA
18V~75V
5A
5.0V
15A
89%
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
office.
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 x 6220
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_E36SR3R320_02092007
14