FEATURES  High efficiency: 91.5% @ 28V/25A  Industry standard size and pinout: 61.0 x 116.8 x 12.7mm (2.40”x 4.60”x 0.50”)  Fixed freque

FEATURES DESCRIPTIONS (CON.) Output Voltage Adjustment (TRIM) To increase or decrease the output voltage set point, the modules may be connected wit

THERMAL CONSIDERATIONS Thermal management is an important part of the system design. To ensure proper, reliable operation, sufficient cooling of the

DS_F48SA28025_12072007 12 MECHANICAL DRAWING Pin No. Name Function1 2 -Vin +Vin 3 4 5 6 7 8 9 10 -ON/OFF Ne age FF Pin S ecificatio+ON/OFF +Vout

DS_F48SA28025_12072007 13 PART NUMBERING SYSTEM F 48 S A 280 25 P R F A Form Factor Input Voltage Number of Outputs Product Series Output Vol

TECHNICAL SPECIFICATIONS (TA=25°C, Vin=48Vdc, nominal Vout unless otherwise noted.) DS_F48SA28025_12072007 2 PARAMETER NOTES and CONDITIONS F48SA2

ELECTRICAL CHARACTERISTICS CURVES Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. 7075808590950 5 10

ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 3: Turn-on transient at full rated load current (resistive load). CH3: Vout;

ELECTRICAL CHARACTERISTICS CURVES Figure 7: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 1A/µs). Load cap: 470µ

ELECTRICAL CHARACTERISTICS CURVES Figure 10: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 15µH sourc

ELECTRICAL CHARACTERISTICS CURVES Figure 13: Output voltage ripple at nominal input voltage and rated load current (100 mV/div). Load capacitance:

DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules

DS_F48SA28025_12072007 9 FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit, w