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FEATURES
High efficiency: 90% @ 3.3V/10A
Industry standard 1x2 pinout
Size: 33.0 x 24.4 x 8.55mm
(1.30”x0.96”x0.34”)
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) r
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TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted.) A in PARAMETER NOTES and CONDITIONS S48SP3R310 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc Operating Temperature Refer to Figure 20 for the measuring point -40 110 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARACTERISTICS Operating Input Vo
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ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for minimum, nominal, and Figure 2: Power dissipation vs. load current for minimum, maximum input voltage at 25°C nominal, and maximum input voltage at 25°C. Figure 3: Typical full load input characteristics at room temperature DS_S48SP3R310_05222008 3
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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). Figure 5: Turn-on transient at zero load current (5 ms/div). Vin=48V. Top Trace: Vout, 1.0V/div; Bottom Trace: ON/OFF Vin=48V. Top Trace: Vout, 1.0V/div, Bottom Trace: ON/OFF input, 2V/div 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). Figure 7: Turn-on transie
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ELECTRICAL CHARACTERISTICS CURVES 0 0 0 0 Figure 8: Output voltage response to step-change in load Figure 9: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF current (50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 10µF tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (100mV/div, 50us/div), Bottom Trace: Iout (2A/div). Scope (100mV/div, 50us/div),
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ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) 0 SCOPE RESISTIV 10u 1u LOAD Vo(-) Figure 12: Input reflected ripple current, i , through a 12µH Figure 13: Output voltage noise and ripple measurement test s source inductor at nominal input voltage and rated load current setup (20 mA/div, 1us/div) 0 Figure 14: Output voltage ripple at nominal input voltage and Figure 15: Output voltage vs. load current showing typical rated load current (Io=10A)(20 mV/div, 1us/div) current
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DESIGN CONSIDERATIONS Input Source Impedance The input source must be insulated from the ac The impedance of the input source connecting to the mains by reinforced or double insulation. DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source The input terminals of the module are not operator is recommended. If the source inductance is more than accessible. a few μH, we advise adding a 10 to 100 μF electrolytic capa
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FEATURES DESCRIPTIONS Remote On/Off Over-Current Protection The remote on/off feature on the module can be either The modules include an internal output over-current negative or positive logic. Negative logic turns the module protection circuit, which will endure current limiting for on during a logic low and off during a logic high. Positive an unlimited duration during output overload. If the logic turns the modules on during a logic high and off output current exceeds the
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FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment To increase or decrease the output voltage set point, ON/OFF ON/OFF Vo Vo (- (-) ) the modules may be connected with an external R R resistor between the TRIM pin and either the Vo(+) or tr triim m- -u up p Vo(-). The TRIM pin should be left open if this feature Vi (-) Vi (-) Trim Trim R R is not used. Loa Load d Vi (+) Vi (+) Vo Vo (+ (+) ) V V Vo o o (-) (-) (-) ON ON ON/O /O /OF F FF F F Figure 18: Circuit configuratio
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THERMAL CONSIDERATIONS Thermal management is an important part of the system Thermal Derating design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over the entire Heat can be removed by increasing airflow over the temperature range of the module. Convection cooling is module. To enhance system reliability, the power module usually the dominant mode of heat transfer. should always be operated below the maximum operating temperature. If the te
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PICK AND PLACE LOCATION SURFACE-MOUNT TAPE & REEL RECOMMENDED PAD LAYOUT (SMD) DS_S48SP3R310_05222008 11
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LEADED (Sn/Pb) PROCESS RECOMMEND TEMP. PROFILE Peak temp. 2nd Ramp-up temp. 210~230°C 5sec. 1.0~3.0°C /sec. 250 Pre-heat temp. 140~180°C 60~120 sec. 200 Cooling down rate <3°C /sec. Ramp-up temp. 150 0.5~3.0°C /sec. 100 Over 200°C 40~50sec. 50 0 1 60 20 180 240 300 Time ( sec. ) 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℃ Ramp down max. 4 ℃/sec. 200℃ Pr
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MECHANICAL DRAWING Surface-mount module Through-Hole module Pin No. Name Function 1 +Vin Positive input voltage 2 -Vin Negative input voltage 3 ON/OFF (Optional) Remote ON/OFF (Optional) 4 -Vout Negative output voltage 5 TRIM (Optional) Output voltage trim (Optional) 6 +Vout Positive output voltage DS_S48SP3R310_05222008 13
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PART NUMBERING SYSTEM R S 48 S P 3R3 10 N F B Product Input Number of Product Output Output ON/OFF Logic Pin Option Code Type Voltage Outputs Series Voltage Current Length/Type F- RoHS 6/6 S - Small 48- S - Single 1x1, 10A 3R3 - 3.3V 10 - 10A N - Negative R - 0.170” A - No trim pin Power 36V~75V (Default) (Default) (Lead Free) B - With trim pin P - Positive N - 0.145” (Default) E- No remote K - 0.110” on/off control M - SMD function MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 10
