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FEATURES
High efficiency: 92.5 % @12V/18A
Size: 57.9x36.8x10.8mm (2.28”x1.45”x0.43”)
(w/o heatspreader)
57.9x36.8x12.7mm (2.28”x1.45”x0.50”)
(with heatspreader)
Industry standard pin out
Fixed frequency operation
Fully protected: OTP, OVP, OCP, UVLO
No minimum load required
Wide output trim range: -20~+10%
Remote sense
Fast transient response
Basic insulation and 2250V isolation
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 certified manufacturing fac
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TECHNICAL SPECIFICATIONS (T =25°C, airflow rate=300 LFM, V =48Vdc, nominal Vout unless otherwise noted; mounted on board.) A in NOTES and CONDITIONS Q48SP12017NRFA PARAMETER Min. Typ. Max. Units ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous -0.5 80 Vdc Transient (100ms, non-operating) 100ms 100 Vdc Operating Temperature Refer to Figure 22 for the measuring point -40 120 °C Storage Temperature -40 105 °C Input/Output Isolation Voltage 2250 Vdc INPUT CHARAC
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ELECTRICAL CHARACTERISTICS CURVES 94 20 92 18 90 16 88 14 86 12 84 82 10 80 8 78 6 76 4 74 36V 48V 75V 36V 48V 75V 2 72 70 0 2468 10 12 14 16 18 2 4 6 8 10 12 14 16 18 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. Figure 3: Turn-on transient at zero load current. Top Trace: Figure 4: Turn-on transient at
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ELECTRICAL CHARACTERISTICS CURVES Figure 5: Output voltage response to step-change in load Figure 6: Output voltage response to step-change in load current current (50%-75% of Io, max: di/dt =0.1A/µs). Load cap:1µF (75%-50% of Io, max; di/dt = 0.1A/µs). Load cap: 10uf tantalum ceramic capacitor and 10uF Tantalum capacitor. Top Trace: capacitor and 1µF ceramic capacitor. Top Trace: Vout Vout (200mV/div), Bottom Trace: Iout (5A/div). Scope (200mV/div), Bottom Trace: Iout (5A/div). Scope measur
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ELECTRICAL CHARACTERISTICS CURVES Figure 9: Test set-up diagram showing measurement points Figure 10: Input reflected ripple current, i through a 12µH c for Input Terminal Ripple Current and Input Reflected Ripple source inductor at nominal input voltage and rated load current Current. (20 mA/div). Note: Measured input reflected-ripple current with a simulated source Inductance (L ) of 12 μH. Capacitor Cs TEST offset possible battery impedance. Measure current as shown above.
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ELECTRICAL CHARACTERISTICS CURVES Copper Strip Vo(+) SCOPE RESISTIVE 10u 1u LOAD Vo(-) Figure 11: Output voltage noise and ripple measurement Figure 12: Output voltage ripple at 36V input voltage and rated test setup load current (50 mV/div). Load capacitance: 1µF ceramic capacitor and 10µF tantalum capacitor. Bandwidth: 25 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 mod
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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 Vi(+) Vo(+) Over-Current Protection Sense(+) The modules include an internal output over-current protection circuit, which will endure current limiting for ON/OFF an unlimited duration during output overload. If the Sense(-) output current exceeds the OCP set point, the modules will automatically shut down and latch off. Vi(-) Vo(-) Over-Voltage Protection Figure 15: Remote on/off implementation The modules include an internal output over-voltag
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FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) (Not applicable to Q48SP120017Exxx) To increase or decrease the output voltage set point, connect 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-down (decrease output voltage) If the external resistor is connected between the TRIM and SENSE (-) the output voltage set point decrea
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THERMAL CONSIDERATIONS THERMAL CURVES 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 (WITHOUT HEATSPERADER) Pin No. Name Function 1 -Vin Negative input voltage 2 CASE Case ground pin 3 ON/OFF Remote ON/OFF 4 +Vin Positive input voltage 5 +Vout Positive output voltage 6 +SENSE Positive remote sense 7 TRIM Output voltage trim 8 -SENSE Negative remote sense 9 -Vout Negative output voltage Notes: Pins 1-4, 6-8 are 1.00mm (0.040”) diameter 1 Pins 5 and 9 are 1.50mm (0.060”) diameter 2 All pins are copper with Tin plating 3 11 DS_Q48
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Mechanical Drawing (FOR Q48SP12017Exxx) 12 DS_Q48SP12017_05302008
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MECHANICAL DRAWING (WITH HEATSPREADER) 13 DS_Q48SP12017_05302008
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PART NUMBERING SYSTEM Q 48 S P 120 17 N R F A Form Input Number of Product Output Output ON/OFF Pin Option Code Factor Voltage Outputs Series Voltage Current Logic Length Q - Quarter 48 - S - Single P - 200W 120 - 12V 18A N - Negative R - 0.170” A - Std. Function F- RoHS 6/6 Brick 36~75V series P - Positive N - 0.145” with case pin (Lead Free) E - Negative and K - 0.110” B - w/o case pin Space - RoHs no trim, no sense H - With 5/6 pins heatspreader and case pin MODEL LIST MODE
