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FEATURES
Input voltage range: 38V~55V
Output 240W @ 44Vin and above
Output 22.3A @ 44Vin and below
High efficiency: 96.3% @ 12V/20A
Size: 58.4mm x 22.8mm x 11.4mm
(2.28” x 0.90” x 0.45”)
Industry standard pinout
Fully protected: Input UVLO, OVP, Output
OCP and OTP
Parallelable for higher output power
2250V isolation
Basic insulation
Monotonic startup
No minimum load required
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
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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 E48SB12020 (Standard) Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 60 Vdc Operating Temperature Refer to Figure 18 for the measuring point -40 128 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARACTERISTICS Operating Input Voltage 38 48 55 Vdc Input Under-Vo
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ELECTRICAL CHARACTERISTICS CURVES 10 97 96 8 95 6 94 93 4 38 Vin 92 3 8Vin 48 Vin 2 4 8Vin 55 Vin 5 5Vin 91 0 90 0 3 6 9 12 15 18 21 24 3 6 9 1215 1821 24 Output Current (A) Output Current (A) Figure 1: Efficiency vs. load current for minimum, nominal, and Figure 2: Power loss vs. load current for minimum, nominal, maximum input voltage at 25°C and maximum input voltage at 25°C. 14 23.00 12 22.00 10 21.00 8 20.00 6 19.00 4 38Vin 18.00 48Vin 55Vin 2 17.00 0 3 6 9 12 15 18 21 24 27 38 40 42
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ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 5: Turn-on transient at full rated load current Figure 6: Turn-on transient at zero load current (5 ms/div). Top (5 ms/div). Top Trace: Vout; 5V/div; Bottom Trace: ON/OFF Trace: Vout: 5V/div; Bottom Trace: ON/OFF input: 2V/div input: 2V/div For Positive Remote On/Off Logic Figure 7: Turn-on transient at full rated load current Figure 8: Turn-on transient at zero load current (5 ms/div). Top (5 ms/div). Top Tr
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ELECTRICAL CHARACTERISTICS CURVES Figure 9: Output voltage response to step-change in load Figure 10: Output voltage response to step-change in load current (50%-75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: current (50%-75%-50% of Io,max; di/dt=1A/µs). Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: 10uF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (200mV/div, 200us/div), Bottom Trace: Iout (10A/div). Vout (200mV/div, 200us/div), Bottom Trace: Io
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ELECTRICAL CHARACTERISTICS CURVES Figure 12: Input Terminal Ripple Current, i , at full rated output Figure 13: 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 47µF electrolytic capacitor (100 mA/div, 2us/div). (20 mA/div, 20us/div). Copper Strip Vo(+) SCOPE RESISTIVE 10u 1u LOAD Vo(-) Figure 14: Output voltage noise and ripple measurement test Figure
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DESIGN CONSIDERATIONS Input Source Impedance Test Result The impedance of the input source connecting to the Test result is in compliance with CISPR 22 class B, which DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is shown as below: is recommended. If the source inductance is more than a few μH, we advise adding a 33 to 220 μF electrolytic capacitor (ESR < 0.5 Ω at 100 kHz) mounted close to the input of the module t
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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 be shut down, and enter in the auto-restart mode or latch mode, which is optional. For auto-restart mode, the module will monitor the module temperature after shutdown. Once the temperature of module is decreased by an OTP hystersis that is about 30 °C, the module will auto-rest
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THERMAL CURVES 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 Testing Setup Delta’s DC/DC power modules are characterized in
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MECHANICAL DRAWING Pin No. Name Function 1 +Vin Positive input voltage 2 ON/OFF Remote ON/OFF 3 -Vin Negative input voltage 4 -Vout Negative output voltage 5 +Vout Positive output voltage Pin Specification: Pins 1-3 1.0mm (0.040”) diameter Pins 4-5 1.5mm (0.060”) diameter All pins are copper with Tin plating (Pb free) DS_E48SB12020_05222008 10
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PART NUMBERING SYSTEM E 48 S B 120 20 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 E- Eighth 48- S- Single B- Bus 120- 12V 20- 20A N- Negative R- 0.170” F- RoHS 6/6 A- OCP, OTP hiccup Brick 38V~55V Converter (Default) (Default) (Lead Free) B- OCP, OTP P- Positive N- 0.145” latch-up K- 0.110”” MODEL LIST MODEL NAME INPUT OUTPUT EFF @ 100% LOAD E48SB9R625NRFA 38V~55V 6.5A 9.6V 25A 240W 96.5%
