Delta Electronics H48SN User Manual Page 1

DATASHEET 012_09262006 DS_H48SN28Delphi Series H48SN, 350W Half Brick Family DC/DC Power Modules: 48V in, 28V/12.5A out The Delphi Series H48SN

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

H48SN28012_09262006 12 MECHANICAL DRAWING Pin No. Name Function1 2 3 4 5 6 7 8 9 -Vin CASE ON/OFF SE Ne age e Pin S ecificatio+Vin +Vout +SENTR

H48SN28012_09262006 13 PART NUMBERING SYSTEM H 48 S N 280 12 N R F A Form Factor Input Voltage Number of Outputs Product Series Output Voltage

TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=600 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS H48SN28012 (

ELECTRICAL CHARACTERISTICS CURVES 70758085909502 4681012OUTPUT CURRENT (A)EFFICIENCY (%)1436Vin 48Vin 75Vin0.05.010.015.020.025.030.035.040.045.002468

ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 4: Turn-on transient at full rated load current (resistive load) (10ms/div).

ELECTRICAL CHARACTERISTICS CURVES Figure 8: Output voltage response to step-change in load current (75%-50% of Io, max; di/dt = 1A/10µS). Load cap: 33

ELECTRICAL CHARACTERISTICS CURVES Figure 11: Input Terminal Ripple Current, ic, at full rated output current and nominal input voltage with 12µH sourc

ELECTRICAL CHARACTERISTICS CURVES 0.05.010.015.020.025.030.002468101214161820LOAD CURRENT (A)OUTPUT VOLTAGE (V)Vin=48VFigure 14: Output voltage ripple

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

FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit, which will endure current limi