Delta Electronics E48SR12007 User Manual

FEATURES
High efficiency: 92.0% @ 12V/7A
Size: 58.4mmx22.80mmx8.4mm
(2.30”x0.90”x0.33”)
Industry standard pin out
2:1 Input voltage range
Fixed frequency operation
Input UVLO, Output OCP, OVP, OTP
2250V isolation and basic insulation
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing
facility
UL/cUL 60950-1 (US & Canada)
recognized, and TUV (EN60950-1)
certified
CE mark meets 73/23/EEC and
93/68/EEC directive
Delphi Series E48SR12007, 84W Eighth Brick
DC/DC Power Modules: 48V in, 12V/7A out
The Delphi Series E48SR12007 Eighth Brick, 48V 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 product provides 84 watts of power with 92.0% efficiency in
an industry standard footprint. With creative design technology and
optimization of component placement, this converter possesses
outstanding electrical and thermal performances, as well as extremely
high reliability under highly stressful operating conditions.
E48SR models are fully protected from abnormal input/output voltage,
current, temperature conditions and also meet all safety requirements
with basic insulation.
All Delphi
OPTIONS
Positive On/Off logic
Short pin lengths
SMD pin
APPLICATIONS
Telecom/Datacom
Wireless Networks
Optical Network Equipment Server and Data Storage
Industrial/Test Equipment
DATASHEET DS_E48SR12007_05222008
TECHNICAL SPECIFICATIONS
(TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.)
PARAMETER NOTES and CONDITIONS E48SR12007 (Standard)
ABSOLUTE MAXIMUM RATINGS
Input Voltage
Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc
Operating Temperature Refer to Figure21 for measuring point -40 115 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc
INPUT CHARACTERISTICS
Operating Input Voltage 36 75 Vdc Input Under-Voltage Lockout
Turn-On Voltage Threshold 33 34 35 Vdc Turn-Off Voltage Threshold 31 32 33 Vdc
Lockout Hysteresis Voltage 1 2 3 Vdc Maximum Input Current 100% Load, 36Vin 3.0 A No-Load Input Current 60 100 mA Off Converter Input Current 3 10 mA Inrush Current (I2t) 1 A2s Input Reflected-Ripple Current P-P thru 12µH inductor, 5Hz to 20MHz 25 mA Input Voltage Ripple Rejection 120 Hz 50 dB
OUTPUT CHARACTERISTICS
Output Voltage Set Point Vin=48V, Io=Io.max, Tc=25°C 11.880 12.000 12.120 Vdc Output Voltage Regulation
Over Load Io=Io,min to Io,max ±10 ±15 mV
Over Line Vin=36V to 75V ±10 ±15 mV
Over Temperature Tc=-40°C to 85°C ±100 mV Total Output Voltage Range Over sample load, line and temperature 11.76 12.24 Vdc Output Voltage Ripple and Noise 5Hz to 20MHz bandwidth
Peak-to-Peak Full Load, 1µF ceramic, 10µF tantalum 40 120 mV
RMS Full Load, 1µF ceramic, 10µF tantalum 10 25 mV Operating Output Current Range 0 7 A Output Over Current Protection 110 140 %
DYNAMIC CHARACTERISTICS
Output Voltage Current Transient 48V, 10µF Tan & 1µF Ceramic load cap, 0.1A/µs
Positive Step Change in Output Current 50% Io.max to 75% Io.max 200 360 mV
Negative Step Change in Output Current 75% Io.max to 50% Io.max 200 360 mV
Settling Time (within 1% Vout nominal) 200 us Turn-On Transient
Start-Up Time, From On/Off Control 6 12 ms
Start-Up Time, From Input 6 12 ms Maximum Output Capacitance Full load; 5% overshoot of Vout at startup 2000 µF
EFFICIENCY
100% Load 92.0 % 60% Load 92.0 %
ISOLATION CHARAC TERISTICS
Input to Output 2250 Vdc Isolation Resistance 100 M Isolation Capacitance 1500 pF
FEATURE CHARACTERISTICS
Switching Frequency 350 kHz ON/OFF Control, Negative Remote On/Off logic
Logic Low (Module On) Von/off at Ion/off=1.0mA 0 0.7 V
Logic High (Module Off) Von/off at Ion/off=0.0 µA 2.4 18 V ON/OFF Control, Positive Remote On/Off logic
Logic Low (Module Off) Von/off at Ion/off=1.0mA 0 0.7 V
Logic High (Module On) Von/off at Ion/off=0.0 µA 2.4 18 V
ON/OFF Current (for both remote on/off logic) Ion/off at Von/off=0.0V 0.7 1 mA
Leakage Current (for both remote on/off logic) Logic High, Von/off=15V 50 uA Output Voltage Trim Range Output Voltage Remote Sense Range Output Over-Voltage Protection Over full temp range; 14.4 V
GENERAL SPECIFICATIONS
MTBF Io=80% of Io, max; Ta=25°C, airflow rate=200FLM 2.03 M hours Weight 19.6 Grams Over-Temperature Shutdown Refer to Figure 21 for measuring point 120 °C
Min. Typ. Max. Units
Pout max rated power Pout max rated power
-10 10 % 10 %
E48SR12007_05222008
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ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for minimum, nominal, and
maximum input voltage at 25°C, 300LFM airflow.
Figure 3: Typical full load input characteristics at 25°C
Figure 2: Power dissipation vs. load current for minimum,
nominal, and maximum input voltage at 25°C, 300LFM airflow.
E48SR12007_05222008
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ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
Figure 4: Turn-on transient at full rated load current (resistor
load) (2ms/div). Vin=48V. Top Trace: Vout, 5V/div; Bottom
Trace: ON/OFF input, 5V/div
For Positive Remote On/Off Logic
Figure 5: Turn-on transient at zero load current (2ms/div).
Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input,
5V/div
Figure 6: Turn-on transient at full rated load current (resistor
load) (2ms/div) for positive on/off mode. Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div
E48SR12007_05222008
Figure 7: Turn-on transient at zero load current (2ms/div) for
positive on/off mode. Vin=48V. Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div
4
ELECTRICAL CHARACTERISTICS CURVES
A
)
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 (0.2V/div, 200us/div), Bottom Trace: Iout (1 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
/div). Scope
Figure 9: Output voltage response to step-change in load
current (75%-50%-75% of Io, max; di/dt = 2.5A/µs). Load cap: 47µF, 35m capacitor. Top Trace: Vout (0.2V/div, 200us/div), Bottom Trace: Iout (1A/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
Ω
ESR solid electrolytic capacitor and 1µF ceramic
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 (L possible battery impedance. Measured current as shown below
of 12 μH. Capacitor Cs offset
TEST
Figure 11: Input Terminal Ripple Current, i
current and nominal input voltage with 12µH source impedance
and 33µF electrolytic capacitor (500 mA/div, 2us/div)
, at full rated output
c
E48SR12007_05222008
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ELECTRICAL CHARACTERISTICS CURVES
)
StripCopper
Vo(+)
0
Figure 12: Input reflected ripple current, i source inductor at nominal input voltage and rated load current (20 mA/div, 2us/div)
, through a 12µH
s
10u
SCOPE RESISTIV
1u
LOAD
Vo(-)
Figure 13: Output voltage noise and ripple measurement test
setup
14
12
10
8
6
OUTPUT VOLTAGE (V
4
Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=7A)(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.
E48SR12007_05222008
2
0
012345678910
48V
LOAD CURRENT (A)
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 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:
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.
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FEATURES DESCRIPTIONS
n
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).
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.
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.
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.
E48SR12007_05222008
Vo(+)Vi(+)
Sense(+)
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% × Vo ut
This limit includes any increase in voltage due to remote sense compensation and output voltage set point adjustment (trim).
Vi(+)
Vo(+)
Sense(+)
Sense(-)
Vi(-)
Contact
Resistance
Vo(-)
Contact and Distributio
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.
8
FEATURES DESCRIPTIONS (CON.)
Δ
×
×
×
×
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 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
⎡ ⎢
⎡ ⎢
Δ
511
10
= KKdownRtrim 88.4022.10
= KdownRtrim 22.10
Ex. When Trim-down -10%(12V×0.9=10.8V)
()
Ω
⎥ ⎦
() ()
⎥ ⎦
Ω=Ω
Figure 19: Circuit configuration for trim-up (increase output
voltage)
If the external resistor is connected between the TRIM and SENSE (+), the output voltage set point increases (Fig. 19). The external resistor value required obtaining a percentage output voltage change % is defined as:
= K
upRtrim 22.10
Ex. When Trim-up +10%(12 V×1.1=13.2V)
= KupRtrim 3.48922.10
Vo
225.1
Δ+××
)100(11.5
511
− Δ
+
511
)10100(1211.5
10225.1
10
()
Ω
()
Ω=
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.
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THERMAL CONSIDERATIONS
A
Y
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 is constantly kept at
6.35mm (0.25’’).
FACING PWB
AIR VELOCIT AND AMBIENT
TEMPERATURE
MEASURED BELOW
THE MODULE
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
PWB
MODULE
50.8 (2.0”)
IR FLOW
12.7 (0.5”)
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
Figure 21: Hot spot temperature measured point
The allowed maximum hot spot temperature is defined at 115℃
Output Current(A)
7.0
6.0
5.0
4.0
3.0
2.0
1.0
0.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85
E48SR12007(Standard) Output Current vs. Ambient Temperature and Air Velocity
Natural
Convection
@Vin = 48V (Transverse Orientation)
100LFM
200LFM
300LFM
400LFM
500LFM
Ambient Temperature (
)
Figure 22: Output current vs. ambient temperature and air
velocity@Vin=48V (Transverse Orientation)
Figure 20: Wind tunnel test setup
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PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL
RECOMMENDED PAD LAYOUT (SMD)
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LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE
Peak temp.
210~230°C 5sec.
Cooling down rate <3°C /sec.
Over 200°C
40~50sec.
300 60 0 120 180 240
Temperature (°C )
250
150
100
50
Ramp-up temp.
0.5~3.0°C /sec.
2nd Ramp-up temp.
Pre-heat temp.
140~180°C 60~120 sec.
Time ( sec. )
1.0~3.0°C /sec.
Note: The temperature refers to the pin of E48SR, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
217
200
.
Peak Temp. 240 ~ 245
Ramp down max. 4℃/sec.
Temp
150
Ramp up max. 3℃/sec.
Preheat time
100~140 sec.
Time Limited 90 sec. above 217
25
Time
Note: The temperature refers to the pin of E48SR, measured on the pin +Vout joint.
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MECHANICAL DRAWING (WITHOUT HEATSPREADER)
Surface-mount module Through-hole module
Pin No. Name Function
1 2 3 4 5 6 7 8
+Vin ON/OFF
-Vin
-Vout
-SENSE TRIM +SENSE +Vout
Positive input voltage Remote ON/OFF Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage
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MECHANICAL DRAWING (WITH HEATSPREADER)
THROUGH-HOLE MODULE
E48SR12007_05222008
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PART NUMBERING SYSTEM
E 48 S R 120 07 N R F A
Type of
Product
E- Eighth
Brick
Input
Voltage
48V S- Single R- Regular 120-12V 07- 7A N- Negative
Number of
Outputs
Product
Series
Output
Voltage
Output
Current
ON/OFF
Logic
(Default)
P- Positive
Pin Length Option Code
R - 0.170”
(Default)
N - 0.145”
K - 0.110”
M - SMD pin
F- RoHS 6/6
(Lead Free)
MODEL LIST
MODEL NAME INPUT OUTPUT EFF @ 100% LOAD
E48SR1R225NRFA 36V~75V 1.3A 1.2V 25A 88.0% E48SR1R525NRFA 36V~75V 1.5A 1.5V 25A 89.5% E48SR1R825NRFA 36V~75V 1.8A 1.8V 25A 90.5% E48SR2R520NRFA 36V~75V 1.9A 2.5V 20A 89.0% E48SR3R320NRFA 36V~75V 2.5A 3.3V 20A 90.5%
E48SR05012NRFA 36V~75V 2.1A 5.0V 12A 91.5% E48SR12005NRFA 36V~75V 2.2A 12V 5A 92.0% E48SR12006NRFA 36V~75V 2.6A 12V 6A 92.5% E48SR12007NRFA 36V~75V 3.0A 12V 7A 92.0% E48SR15004NRFA 36V~75V 2.2A 15V 4A 92.0%
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.
A - Standard
Functions
(Default)
H - with Heat
Spreader
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:
Phone: +41 31 998 53 11 Fax: +41 31 998 53 53 Email: DCDC@delta-es.com
Asia & the rest of world:
Telephone: +886 3 4526107 ext 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
.
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