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FEATURES
High efficiency: 90% @ 3.3V/10A Industry standard 1x2 pinout Size: 33.0 x 24.4 x 8.3mm (1.30"x0.96"x0.33") SMD and Through-hole versions Fixed frequency operation Input UVLO, OVP OTP and output OCP, OVP (default is auto-restart) Monotonic startup into normal and pre-biased loads 2250V isolation and basic insulation 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 S48SP, 35W 1x1 Brick DC/DC Power Modules: 48V in, 3.3V/10A out
The Delphi Series S48SP, 1x1 Brick, 48V input, single output, isolated DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing Delta Electronics, Inc. This product family is available in a surface mount or through-hole package and provides up to 35 watts of power or 10A of output current (3.3V and below) in a new 1x1 form factor (1.30"x0.96"x0.33"). The pinout is compatible with the industry standard 1x2 products. With creative design technology and optimization of component placement, these converters possess outstanding electrical and thermal performance, as well as extremely high reliability under highly stressful operating conditions. Typical efficiency of the 3.3V/10A module is better than 90%. All modules are fully protected from abnormal input/output voltage, current, and temperature conditions.
OPTIONS
SMD module available Remote On/Off Trim pin OTP and Output OVP, OCP mode, Auto-restart (default) or latch-up Short pin lengths Encapsulated case optional
APPLICATIONS
Optical Transport Data Networking Communications, including Wireless and traditional Telecom Servers
DATASHEET DS_S48SP3R310_03062007
TECHNICAL SPECIFICATIONS
(TA=25C, 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 Over-Voltage Protection GENERAL SPECIFICATIONS MTBF Weight Over-Temperature Shutdown
NOTES and CONDITIONS
S48SP3R310 (Standard)
Min. Typ. Max. Units 80 100 110 125 2250 75 34 32 2 40 10 0.01 35.5 33.5 3.0 1.10 Vdc Vdc C C Vdc Vdc Vdc Vdc Vdc A mA mA A2s mA dB Vdc mV mV mV V mV mV A % mV mV us ms ms F % % 2250 10 1000 400 Vdc M pF kHz 0.8 18 0.8 18 0.25 -10% 3.8 1.98 10.5 117 30 10% 4.62 V V V V mA uA % V M hours grams C
100ms Refer to Figure 20 for the measuring point
-40 -55 36 32.5 30.5 1.0
100% Load, 36Vin
P-P thru 12H inductor, 5Hz to 20MHz 120 Hz Vin=48V, Io=Io.max, Tc=25C Io=Io, min to Io, max Vin=36V to 75V Tc=-40C to 100C Over load, line and temperature 5Hz to 20MHz bandwidth Full Load, 1F ceramic, 10F tantalum Full Load, 1F ceramic, 10F tantalum Output Voltage 10% Low 48V, 10F Tan & 1F Ceramic load cap, 0.1A/s 50% Io.max to 75% Io.max 75% Io.max to 50% Io.max 3.25
10 60 3.3 3 3 33 3.2 30 10 0 110 100 100 50 15 15 3.35 10 10 3.4 60 20 10 140
Full load; 5% overshoot of Vout at startup 90.0 89.0
5000
Von/off Von/off Von/off Von/off Ion/off at Von/off=0.0V Logic High, Von/off=15V Across Trim Pin & +Vo or -Vo, Poutmax rated Over full temp range; % of nominal Vout Io=80% of Io, max; Ta=25C; air flow 300LFM Refer to Figure 20 for the measuring point
-0.7 2 -0.7 2
DS_S48SP3R310_03062007
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ELECTRICAL CHARACTERISTICS CURVES
Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25C
Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25C.
Figure 3: Typical full load input characteristics at room temperature
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ELECTRICAL CHARACTERISTICS CURVES
For Negative Remote On/Off Logic
0
0
0
0
Figure 4: Turn-on transient at full rated load current (5 ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF input, 2V/div
Figure 5: Turn-on transient at zero load current (5 ms/div). Vin=48V. Top Trace: Vout, 1.0V/div, Bottom Trace: ON/OFF input, 2V/div
For Positive Remote On/Off Logic
0
0
0
0
Figure 6: Turn-on transient at full rated load current (5 ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF input, 2V/div
Figure 7: Turn-on transient at zero load current (5 ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF input, 2V/div
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ELECTRICAL CHARACTERISTICS CURVES
0
0
0
Figure 8: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/s). Load cap: 10F tantalum capacitor and 1F ceramic capacitor. Top Trace: Vout (100mV/div, 50us/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 9: Output voltage response to step-change in load current (50%-75% of Io, max; di/dt = 0.1A/s). Load cap: 10F tantalum capacitor and 1F ceramic capacitor. Top Trace: Vout (100mV/div, 50us/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 H. Capacitor Cs offset possible battery impedance. Measure current as shown below
Figure 11: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12H source impedance and 33F electrolytic capacitor (50 mA/div, 1us/div)
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ELECTRICAL CHARACTERISTICS CURVES
Copper Strip
Vo(+)
0
Vo(-)
10u
1u
SCOPE
RESISTIV LOAD
Figure 12: Input reflected ripple current, is, through a 12H source inductor at nominal input voltage and rated load current (20 mA/div, 1us/div)
Figure 13: Output voltage noise and ripple measurement test setup
0
Figure 14: Output voltage ripple at nominal input voltage and rated load current (Io=10A)(20 mV/div, 1us/div) Load capacitance: 1F ceramic capacitor and 10F 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
Figure 15: Output voltage vs. load current showing typical current limit curves and converter shutdown points
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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 H, we advise adding a 10 to 100 F electrolytic capacitor (ESR < 0.7 at 100 kHz) mounted close to the input of the module to improve the stability. 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 fuse with 3A 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.
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:
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.
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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, and enter hiccup mode or latch mode, which is optional. For hiccup mode, the module 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. For latch mode, the module will latch off once it shutdown. The latch is reset by either cycling the input power or by toggling the on/off signal for one second.
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.
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 enter in hiccup mode or latch mode, which is optional. For hiccup mode, the module 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. For latch mode, the module will latch off once it shutdown. The latch is reset by either cycling the input power or by toggling the on/off signal for one second.
ON/OFF Vo(-)
Vi(-) Vi(+)
Trim
R Load
Vo(+)
Figure 16: Remote on/off implementation
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, and enter hiccup mode or latch mode, which is optional. For hiccup mode, the module 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. For latch mode, the module will latch off once it shutdown. The latch is reset by either cycling the input power or by toggling the on/off signal for one second.
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FEATURES DESCRIPTIONS (CON.)
Output Voltage Adjustment
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.
ON/OFF Vo (-) R trim-up Vi (-) Vi (+) Vo (+)
ON/OFF Vo (-)
Trim
R Load
Vi (-)
Trim R trim-down Vo (+)
R Load
Figure 18: Circuit configuration for trim-up (increase output voltage)
Vi (+)
Figure 17: Circuit configuration for trim-down (decrease output voltage)
If the external resistor is connected between the TRIM and Vo(-) the output voltage set point increases (Fig. 18). The external resistor value required to obtain an output voltage change from 3.3V to the desired Vo_adj is defined as:
2.5 5110 Vo_adj - 3.3
- 2050
If the external resistor is connected between the TRIM and Vo(+) pins, the output voltage set point decreases (Fig. 17). The external resistor value required to obtain an output voltage change from 3.3V to the desired Vo_adj is defined as:
Rtrim_down ( Vo_adj - 2.5 ) 5110 3.3 - Vo_adj
Rtrim_up
Ex. When Trim-up +10% Vo_adj=3.3Vx(1+10%)=3.63V
Rtrim_up 2.5 5110 3.63 - 3.3
4
- 2050
Ex. When Trim-down -10% Vo_adj=3.3Vx(1-10%)=2.97V
Rtrim_down ( 2.97 - 2.5 ) 5110 3.3 - 2.97
3
- 2050
Rtrim_up = 3.666 x 10 ohm
- 2050
Rtrim_down = 5.228 x 10 ohm
When using trim function, 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
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 20: Hot spot temperature measured point The allowed maximum hot spot temperature is defined at 110
FACING PWB PWB
MODULE
Output Current(A)
S48SP3R310(Standard) Output Load vs. Ambient Temperature and Air Velocity @Vin=48V (Either Orientation)
11 10 9 8
Natural Convection
AIR VELOCITY AND AMBIENT TEMPERATURE MEASURED BELOW THE MODULE
AIR FLOW
7 6 5
100LFM
200LFM
300LFM
50.8 (2.0")
4 3 2 1
400LFM
500LFM
600LFM
12.7 (0.5")
Note: Wind Tunnel Test Setup Figure Dimensions are in millimeters and (Inches)
0 60 65 70 75 80 85 Ambient Temperature ()
Figure 19: Wind tunnel test setup
Figure 21: Output load vs. ambient temperature and air velocity@Vin=48V (Either Orientation)
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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
250 Temperature (C ) 200 150 100 50 2nd Ramp-up temp. Peak temp. 1.0~3.0C /sec. 210~230C 5sec. Pre-heat temp. 140~180C 60~120 sec. Cooling down rate <3C /sec.
Ramp-up temp. 0.5~3.0C /sec.
Over 200C 40~50sec.
0
60
120 Time ( sec. )
180
240
300
Note: The temperature refers to the pin of S48SP, measured on the pin +Vout joint.
LEAD FREE (SAC) PROCESS RECOMMEND TEMP. PROFILE
Temp.
Peak Temp. 240 ~ 245
217 200
Ramp down max. 4/sec.
150
Preheat time 100~140 sec. Ramp up max. 3/sec.
Time Limited 90 sec. above 217
25
Time
Note: The temperature refers to the pin of S48SP, measured on the pin +Vout joint.
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MECHANICAL DRAWING
Surface-mount module Through-Hole module
Pin No.
1 2 3 4 5 6
Name
+Vin -Vin ON/OFF (Optional) -Vout TRIM (Optional) +Vout
Function
Positive input voltage Negative input voltage Remote ON/OFF (Optional) Negative output voltage Output voltage trim (Optional) Positive output voltage
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PART NUMBERING SYSTEM
S
Product Type
S - Small Power
48
S
P
3R3
Output Voltage
10
Output Current
10 - 10A
N
ON/OFF Logic
N - Negative (Default) P - Positive - No remote on/off control function
R
Pin Length/Type
R - 0.170" (Default) N - 0.145" K - 0.110" M - SMD
F
A
Option Code
Input Number of Product Voltage Outputs Series
4836V~75V S - Single
1x1, 10A 3R3 - 3.3V
F- RoHS 6/6 (Lead Free)
A - No trim pin (Default) B - With trim pin
MODEL LIST
MODEL NAME
S48SP3R310NRFA S48SP05007NRFA S48SP12003NRFA S48SP15002NRFA 36V~75V 36V~75V 36V~75V 36V~75V
INPUT
1.1A 1.2A 1.2A 1A 3.3V 5.0V 12V 15V
OUTPUT
10A 7A 3A 2A
EFF @ 100% LOAD
90.0% 90.0% 90.0% 90.0%
Note:
1. 2. 3. 4. 5. Default remote on/off logic is negative; Default Pin length is 0.170"; Default OTP and output OVP, OCP mode is auto-restart;
Default is no trim pin;
For different option, 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 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.
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