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FEATURES
High Efficiency: 88% @ 3.3V/15A
Size: 49.6mm x 39.4mm x 8.9mm
(1.95”x1.55”x0.35”)
Industry standard pin out
Fixed frequency operation
Input UVLO, OTP, Output OCP, OVP, (auto
recovery)
Monotonic startup into normal and
pre-biased loads
2250V isolation and basic insulation
No minimum load required
4:1 Input voltage range
ISO 9001, TL 9000, ISO 14001, QS 9000,
OHSAS 18001 certified manufacturing
facility
UL/cUL 60950 (US & Canada) Recognized,
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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 L36SA3R315 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Maximum input voltage 100 Vdc Operating Temperature Refer to Figure21 for measuring point -40 130 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARACTERISTICS Operating Input Voltage
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ELECTRICAL CHARACTERISTICS CURVES 9 90 8 75Vin 7 48Vin 80 6 18Vin 24Vin 5 18Vin 4 75Vin 24Vin 70 3 48Vin 2 1 60 12 34 56 7 8 9 101112131415 123456789 101112131415 OUTPUT CURRENT (A) OUTPUT CURRENT (A) 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. 3.3 3 2.7 2.4 2.1 1.8 1.5 1.2 0.9 0.6 0.3 0 16 21 26 31 36 41 46 51 56 61 66 71 INPUT VOLT
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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 (resistive Figure 5: Turn-on transient at zero load current (5 ms/div). load) (5 ms/div). Vin=48V.Top Trace: Vout, 1V/div; Bottom Vin=48V.Top Trace: Vout, 1V/div; Bottom Trace: ON/OFF input, Trace: ON/OFF input, 5V/div 5V/div For Positive Remote On/Off Logic 0 0 0 0 Figure 6: Turn-on transient at full rated load current (resistive Figure 7: Turn-on tran
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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%-75% of Io, max; di/dt = 0.1A/µs). Load cap: current (75%-50%-75% of Io, max; di/dt = 1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: 330µF, 35m Ω ESR solid electrolytic capacitor and 1µF ceramic Vout (100mV/div, 200us/div), Bottom Trace: I out (3.75A/div). capacitor. Top Trace: Vou
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ELECTRICAL CHARACTERISTICS CURVES 0 0 Figure 11: Input Terminal Ripple Current, i , at full rated output Figure 12: Input reflected ripple current, i , through a 12µH c s current and nominal input voltage with 12µH source impedance source inductor at nominal input voltage and rated load current and 33µF electrolytic capacitor (500 mA/div, 2us/div). (20 mA/div, 2us/div). Copper Strip Vo(+) SCOPE RESISTIVE 10u 1u LOAD Vo(-) Figure 13: Output voltage noise and ripple measurement test
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ELECTRICAL CHARACTERISTICS CURVES output current range 3.5 3 2.5 2 1.5 0 1 0.5 0 0 5 10 15 20 Output current (A) Figure 14: Output voltage ripple at nominal input voltage and Figure 15: Output voltage vs. load current showing typical rated load current (Io=10A)(10 mV/div, 2us/div) current limit curves and converter shutdown points. Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 20 MHz. Scope measurements should be made using a BNC cable (length shorte
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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 is The input terminals of the module are not operator recommended. If the source inductance is more than a accessible. few µH, we advise adding a 10 to 100 µF electrolytic capa
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FEATURES DESCRIPTIONS Vi(+) Vo(+) Over-Current Protection Sense(+) The modules include an internal output over-current ON/OFF protection circuit, which will endure current limiting for Sense(-) an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules Vi(-) Vo(-) 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 Figure 16:
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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) If the external resistor is connected between the TRIM and SENSE (+) the output voltage set point increases (Fi
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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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MECHANICAL DRAWING OPEN FRAME VERSION PIN NO. NAME FUNCTION 1 CASE (OPTION) CASE 2 +VIN POSITIVE INPUT VOLTAGE 3 –VIN NEGATIVE INPUT VOLTAGE 4 NC NOT CONNECTED 5 ON/OFF REMOTE ON/OFF 6 TRIM OUTPUT VOLTAGE TRIM 7 –SENSE (OPTION) NEGATIVE OUTPUT VOLTAGE SENSE 8 –VOUT NEGATIVE OUTPUT VOLTAGE 9 +VOUT POSITVE OUTPUT VOLTAGE 10 +SENSE (OPTION) POSITVE OUTPUT VOLTAGE SENSE 11 NC NOT CONNECTED ALL PINS ARE COPPER WITH TIN PLATING DS_L36SA3R315_021420
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PART NUMBERING SYSTEM L 36 S A 3R3 15 N R F A Type of Input Number of Product Output Output ON/OFF Pin Length Option Code Product Voltage Outputs Series Voltage Current Logic 18~75V S- Single Advanced 3R3-3.3V 15-15A N-Negative R-0.170” A-Standard L- 2 x 1.6 F- RoHS 6/6 P-Positive Functions Brick (Lead Free) B-With sense MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD L36SA3R315NRFA 18V~75V 2.1A 3.3V 15A 88% L36SA05010NRFA 18V~75V 1.9A 5V 10A 89% L36SA12004NRFA 18V~75V 1.9A
