E24SR12005NRFA - Delta Electronics

FEATURES
Š
High efficiency: 90.5% @ 12V/ 5A
Š
Size: 58.4mmx22.8mmx10.0mm
(2.30”x0.90”x0.39”)
Š
SMD and Through-hole versions
Š
Industry standard pin out
Š
2:1 input range
Š
Fixed frequency operation
Š
Input UVLO, Output OTP, OCP, OVP
Š
Basic insulation
Š
2250V isolation
Š
Monotonic startup into normal and
pre-biased loads
Š
Output voltage trim:±10%
Š
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS 9000,
Š
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950-1 (US & Canada) recognized
Š
Delphi Series E24SR, 66W Eighth Brick Family
DC/DC Power Modules: 24V in, 12V/5A out
The Delphi Series E24SR Eighth Brick, 24V input, single output,
isolated DC/DC converters are the latest offering from a world leader in
OPTIONS
Š
Positive On/Off logic
power systems technology and manufacturing ― Delta Electronics, Inc.
Š
SMD pin
This product family is available in either a through-hole or
surface-mounted package and provides up to 66 watts of power or 20A of
Š
Short pin lengths available
output current (3.3V and below) in an industry standard footprint and
pinout. The E24SR converter operates from an input voltage of 18V to
36V and is available in output voltages from 3.3V to 12V. Efficiency for
the 12V output is 90.5% at 5A full load. With creative design technology
and optimization of component placement, these converters possess
outstanding electrical and thermal performance, as well as extremely
APPLICATIONS
high reliability under highly stressful operating conditions. All models are
Š
Telecom / DataCom
fully protected from abnormal input/output voltage, current, and
temperature conditions. The Delphi Series converters meet all safety
Š
Wireless Networks
Š
Optical Network Equipment
requirements with basic insulation.
Š
Server and Data Storage
Š
Industrial / Test Equipment
DATASHEET
DS_E24SR12005_09262012
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=24 Vdc, nominal Vout unless otherwise noted.)
PARAMETER
NOTES and CONDITIONS
E24SR12005 (Standard)
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
2
Inrush Current (I t)
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
Back bias start-up
Back drive current limit while pin on-off is enabled
Back drive current limit while pin on-off is disabled
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 pin open circuit voltage
On/off pin pull down resistance
Output Voltage Trim Range
Output Voltage Remote Sense Range
Output Over-Voltage Protection
GENERAL SPECIFICATIONS
MTBF
Weight
Over-Temperature Shutdown
DS_E24SR12005_09262012
Typ.
Max.
Units
36
50
117
125
2250
Vdc
Vdc
°C
°C
Vdc
36
Vdc
17.8
17
1.5
3.8
180
10
0.1
Vdc
Vdc
Vdc
A
mA
mA
2
As
mA
dB
12
12.18
Vdc
±3
±3
±100
±10
±10
12.24
mV
mV
mV
V
50
15
100
30
5
140
mV
mV
A
%
180
180
150
250
250
mV
mV
us
100ms
Refer to figure 21 for measuring point
-55
18
16
15
0.7
17
16
1
100% Load, 18Vin
150
3
P-P thru 12µH inductor, 5Hz to 20MHz
120 Hz
Vin=24V, Io=Io.max, Tc=25°C
Io=Io, min to Io, max
Vin=18V to36V
Tc=-40°C to100°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
55
11.82
11.76
0
110
10µF Tan & 1µF Ceramic load cap, 0.1A/µs
50% Io.max to 75% Io.max
75% Io.max to 50% Io.max
5
5
≤ 90% of nominal output voltage
Io=0A
Io=0A
Full load; 5% overshoot of Vout at startup
ms
ms
0.1
50
2000
90.5
90
%
%
2250
1500
Vdc
MΩ
pF
350
kHz
10
Pout ≦ max rated power
Pout ≦ max rated power
Over full temp range;
Io=80% of Io, max; Ta=25°C, 300LFM airflow
Refer to figure 21 for measuring point
A
mA
µF
-0.7
3
0.5
18
V
V
-0.7
3
0.5
18
9.6
V
V
V
Kohm
%
%
V
12
-10
+10
+10
16.8
13.8
2.81
22.0
130
M hours
grams
°C
2
ELECTRICAL CHARACTERISTICS CURVES
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.
4.0
3.5
Inputt Current(A)
3.0
2.5
2.0
1.5
1.0
0.5
0.0
18
20
22
24
26
28
30
32
34
36
INPUT VOLT AGE (V)
Figure 3: Typical full load input characteristics at room
temperature
DS_E24SR12005_09262012
3
ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
0
0
0
0
Figure 4: Turn-on transient at full rated load current (resistive
load) (2 ms/div). Vin=24V. Top Trace: Vout, 5.0V/div; Bottom
Trace: ON/OFF input, 10V/div
Figure 5: Turn-on transient at zero load current (2 ms/div).
Vin=24V. Top Trace: Vout: 5.0V/div, Bottom Trace: ON/OFF
input, 10V/div
For Positive Remote On/Off Logic
0
0
0
0
Figure 6: Turn-on transient at full rated load current (resistive
load) (2 ms/div). Vin=24V. Top Trace: Vout, 5.0V/div; Bottom
Trace: ON/OFF input, 10V/div
DS_E24SR12005_09262012
Figure 7: Turn-on transient at zero load current (2 ms/div).
Vin=24V Top Trace: Vout, 5.0V/div; Bottom Trace: ON/OFF
input, 10V/div
4
ELECTRICAL CHARACTERISTICS CURVES
0
0
0
0
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, 200us/div), Bottom Trace: Iout
(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 = 1A/µs). Load cap:
470µF, 35mΩ ESR solid electrolytic capacitor and 1µF ceramic
capacitor.
Top Trace: Vout (100mV/div, 200us/div), Bottom Trace: Iout
(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
0
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_E24SR12005_09262012
Figure 11: Input Terminal Ripple Current, ic, at full rated output
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (200 mA/div, 2us/div)
5
ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
0
SCOPE
1u
10u
RESISTIV
LOAD
Vo(-)
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)
Figure 13: Output voltage noise and ripple measurement test
setup
14.0
0
Output Voltage (V)
12.0
10.0
8.0
6.0
4.0
2.0
0.0
0
1
2
3
4
5
6
7
8
Load Current (A)
Figure 14: Output voltage ripple at nominal input voltage and
rated load current (Io=5A)(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_E24SR12005_09262012
Figure 15: Output voltage vs. load current showing typical
current limit curves and converter shutdown points
6
DESIGN CONSIDERATIONS
Safety Considerations
Input Source Impedance
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:
Š
The input source must be insulated from the ac
mains by reinforced or double insulation.
Š
The input terminals of the module are not operator
accessible.
Š
If the metal baseplate is grounded, one Vi pin and
one Vo pin shall also be grounded.
Š
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.
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. Below is the reference design
for an input filter tested with E24SR12005XXXX to meet
class B in CISSPR 22.
Schematic and Components List
Cin is 100uF*2 low ESR Aluminum cap;
CX is 2.2uF ceramic cap;
CY1 are 10nF ceramic caps;
CY2 are 10nF ceramic caps;
CY is 1nF ceramic cap;
L1 is common-mode inductor, L1=0.53mH;
Test Result: Vin=24V, Io=5A,
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 15A 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
Yellow line is quasi peak mode; Blue line is average mode
DS_E24SR12005_09262012
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
Vo(+)
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, and enter 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.
Trim
ON/OFF
Sense(-)
Vo(-)
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).
Over-Temperature Protection
Vi(+)
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.
Vo(+)
Sense(-)
ON/OFF
R
Trim
Load
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 floating.
Vi(-)
Vo(-)
Distribution
resistance
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_E24SR12005_09262012
8
FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment (TRIM)
To increase or decrease the output voltage set point,
connect 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:
 511

Rtrim − down = 
− 10 .2  (K Ω )
 ∆

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 =
Ex. When Trim-up +10% (12V×1.1=13.2V)
Ex. When Trim-down -10% (12V×0.9=10.8V)
 511

Rtrim − down = 
− 10 .2  (K Ω ) = 40 .9 (K Ω )
 10

5 . 11 Vo (100 + ∆ ) 511
−
− 10 . 2 (K Ω )
∆
1.225 ∆
Rtrim − up =
5.11 × 12 × (100 + 10) 511
−
− 10.2 = 489.3(KΩ )
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_E24SR12005_09262012
9
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 117℃
Output Current(A)
E24SR12005(Standard) Output Current vs. Ambient Temperature and Air Velocity
@Vin = 24V (Transverse Orientation)
5
Natural
Convection
PWB
FACING PWB
MODULE
4
100LFM
3
200LFM
2
AIR VELOCITY
AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
1
50.8 (2.0”)
0
25
30
35
40
45
50
55
60
65
70
75
80
85
Ambient Temperature (℃)
AIR FLOW
Figure 22: Output current vs. ambient temperature and air velocity
@Vin=24V (Transverse Orientation)
12.7 (0.5”)
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
Figure 20: Wind tunnel test setup figure
DS_E24SR12005_09262012
10
PICK AND PLACE LOCATION
SURFACE-MOUNT TAPE & REEL
RECOMMENDED PAD LAYOUT (SMD)
DS_E24SR12005_09262012
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 E24SR, 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℃
Preheat time
100~140 sec.
150℃
Time Limited 90 sec.
above 217℃
Ramp up
max. 3℃/sec.
25℃
Time
Note: The temperature refers to the pin of E24SR, measured on the pin +Vout joint.
DS_E24SR12005_09262012
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_E24SR12005_09262012
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
24
S
R
120
05
N
R
Type of
Product
Input
Voltage
Number of
Outputs
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
Pin
Length/Type
S - Single
R - Regular
120 - 12V
05 - 05A
N - Negative
P - Positive
E - Eighth 24-18V~36V
Brick
R - 0.170”
N - 0.145”
K - 0.110”
M - SMD
F
A
Option Code
F- RoHS 6/6
(Lead Free)
A - Standard
Functions
MODEL LIST
MODEL NAME
E24SR06508NRFA
E24SR12005NRFA
INPUT
18V~36V
18V~36V
OUTPUT
3.4A
4A
6.5V
12V
EFF @ 100% LOAD
8A
5A
90.5%
90.5%
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 office.
CONTACT: www.delta.com.tw/dcdc
USA:
Telephone:
East Coast: 978-656-3993
West Coast: 510-668-5100
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.
DS_E24SR12005_09262012
14