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FEATURES
High Efficiency 88% @ 1.8V/ 60A
Standard footprint: 58.4 x 61.0 x 11.7mm
(2.30” x2.40” x0.46”)
Industry standard pin out
Startup into pre-biased load
Fixed frequency operation
Fully protected: OTP, OVP, OCP, UVLO
No minimum load required
Wide output trim range
Fast transient response
Basic insulation
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing facility
UL/cUL 60950 (US & Canada) Recognized,
and TUV (EN60950) Certified
CE ma
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TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted.) A in NOTES and CONDITIONS H48SR1R860NRFA PARAMETER Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous 80 Vdc Transient (100ms) 100ms 100 Vdc Operating Device Temperature Tc -40 115 °C Storage Temperature -55 125 °C Input/Output Isolation Voltage 1 minute 1500 Vdc INPUT CHARACTERISTICS Operating Input Voltage 36 48 75 Vdc Input Unde
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ELECTRICAL CHARACTERISTICS CURVES 95 24.0 36Vin 48Vin 75Vin 36Vin 48Vin 75Vin 90 20.0 85 16.0 80 12.0 75 8.0 70 4.0 65 60 0.0 10 20 30 40 50 60 10 20 30 40 50 60 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. (Vout=1.8V) nominal, and maximum input voltage at 25°C. (Vout=1,8V) 90 24.0 36Vin 48Vin 75Vin 85 20.0 80 16.0 75 12.0 70 8.0 65 4.0 36Vin 48Vin
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ELECTRICAL CHARACTERISTICS CURVES 90 24.0 88 20.0 86 16.0 84 12.0 82 8.0 80 4.0 78 36Vin 48Vin 75Vin 36Vin 48Vin 75Vin 76 0.0 0.8 1.0 1.2 1.4 1.6 1.8 0.8 1.0 1.2 1.4 1.6 1.8 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) Figure 5: Efficiency vs. output voltage for minimum, nominal, Figure 6: Power dissipation vs. output voltage for minimum, and maximum input voltage at 25°C. (Iout=60A) nominal, and maximum input voltage at 25°C. (Iout=60A) 5.0 Io=60A Io=36A Io=6A 4.0 3.0 2.0 1.0 0.0 30 35 40 45 50 55
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ELECTRICAL CHARACTERISTICS CURVES Figure 9: Turn-on transient at zero load current (2 ms/div). Figure 10: Output voltage response to step-change in load Top Trace: Vout: 1V/div; Bottom Trace: ON/OFF input: current (75%-50%-75% of Io, max; di/dt = 0.1A/µs). Load cap: 2V/div 10µF, tantalum capacitor and 1µF ceramic capacitor. Top Trace: Vout (20 mV/div), Bottom Trace: Iout (20A/div). Scope measurement should be made using a BNC cable (length shorter than 20 inches). Position the load betwe
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ELECTRICAL CHARACTERISTICS CURVES Figure 13: Input Terminal Ripple Current, i , at full rated Figure 14: Input reflected ripple current, i , through a 12µH c s output current and nominal input voltage with 12µH source source inductor at nominal input voltage and rated load current impedance and 33µF electrolytic capacitor (500 mA/div). (5 mA/div). Copper Strip Vo(+) SCOPE RESISTIVE 10u 1u LOAD Vo(-) Figure 15: Output voltage noise and ripple measurement Figure 16: Output voltage ripp
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THERMAL CURVES Figure 18: Hot spot location (unit in mm) Figure 19: Output current vs. ambient temperature and air velocity (Vin=48V / 75V, V =0.8V ) out Figure 20: Output current vs. ambient temperature and air Figure 21: Power dissipation vs. ambient temperature and air velocity (Vin=48V / 75V, V =1.8V ) velocity (Vin=48V / 75V, V =0.8V~1.8V ) out out 7 DS_H48SR1R860_06272006
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DESIGN CONSIDERATIONS Do not ground one of the input pins without grounding Input Source Impedance one of the output pins. This connection may allow a non-SELV voltage to appear between the output pin The impedance of the input source connecting to the and ground. DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input The power module has extra-low voltage (ELV) outputs source is recommended. If the source inductance is when al
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FEATURES DESCRIPTIONS Over-Current Protection Vi(+) Vo(+) The modules include an internal output over-current Sense(+) protection circuit, which will endure current limiting for an unlimited duration during output overload. If the ON/OFF output current exceeds the OCP set point, the modules Sense(-) will automatically shut down (hiccup mode). Vi(-) Vo(-) The modules will try to restart after shutdown. If the overload condition still exists, the module will shut down again. T
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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 24: Circuit configuration for trim-down (decrease output voltage) If the external resistor is connected between the TRIM and SENSE (-) the output voltage set point decreases (
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THERMAL CONSIDERATIONS Thermal management is an important part of the PWB FACING PWB system design. To ensure proper, reliable operation, sufficient cooling of the power module is needed over MODULE 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 AIR VELOCITY thermal performance of the power module is a wind AND AMBIENT tunnel. TEMPERATURE MEASURED BELOW 50.8 (2
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MECHANICAL DRAWING Pin No. Name Function 1 -Vin Negative input voltage 2 ON/OFF Remote ON/OFF 3 +Vin Positive input voltage 4 +Vout Positive output voltage 5 +SENSE Positive remote sense 6 TRIM Output voltage trim 7 -SENSE Negative remote sense 8 -Vout Negative output voltage Notes: Pins 1-3, 5-7 are 1.00mm (0.039”) diameter 1 Pins 4 and 8 are 2.00mm (0.079”) diameter 2 All pins are copper with Tin plating. 3 12 DS_H48SR1R860_06272006
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PART NUMBERING SYSTEM H 48 S R 1R8 60 N R F A Form Input Number of Product Output Output ON/OFF Pin Option Code Factor Voltage Outputs Series Voltage Current Logic Length H – Half-Brick 48- S- Single R- Single 1R8- 1.8V 60- 60A N-Negative R-0.170” A - Standard F- RoHS 6/6 36V~75V Board 80- 80A P-Positive N-0.145” Functions (Lead Free) K-0.110” MODEL LIST Part Number INPUT OUTPUT EFF @ 100% LOAD H48SR1R860NRFA 36V~75V 0.8V – 1.9V 60A 88% 3.7A H48SR1R880NRFA 36V~75V 5.0A 0.8V – 1.9V
