User's Manual

ManualsBrandsDelta ManualsPower SupplyDelta Series H48SA

FEATURES

 High efficiency: 93.2% @ 12V/ 25A

 Standard footprint: 58.4 x 61.0 x 11.2 mm

(2.30” x2.40”x0.44”)

 Industry standard pin out

 Single board construction

 Fixed frequency operation

 2250V Isolation

 Basic insulation

 Monotonic startup into normal and pre-

bias loads

 Fully protected: input UVLO, output OVP,

OCP, OTP

 No minimum load required

 Wide output trim range: -20%, +10%

 ISO 9001, TL 9000, ISO 14001, QS

9000, OHSAS 18001 certified

manufacturing facility

 UL/cUL 60950-1 (US & Canada)

Recognized, and TUV (EN60950-1)

Certified

 CE mark meets 73/23/EEC and

93/68/EEC directives

OPTIONS

 Positive on/off

 Heatspreader available for extended

operation

APPLICATIONS

 Telecom / DataCom

 Wireless Networks

 Optical Network Equipment

 Server and Data Storage

 Industrial / Test Equipment

Delphi Series H48SA, Half Brick Family

DC/DC Power Modules: 48V in, 12V/25A out

The Delphi Series H48SA Half Brick, 48V input, single output, isolated,

open frame DC/DC converters are the latest offering from a world

leader in power systems technology and manufacturing — Delta

Electronics, Inc. This product family provides up to 300 watts of power

or up to 25A of output current in an industry standard footprint. This

product represents the next generation of design technology required

by today’s leading-edge circuitry. With creative design technology and

optimization of component placement, these converters possess

outstanding electrical and thermal performance, as well as extremely

high reliability under highly stressful operating conditions. Typical

efficiency of the 12V, 300W module is better than 93.2% and all

modules are fully protected from abnormal input/output voltage, current

and temperature conditions. The Delphi Series converters meet all

safety requirements with basic insulation. A variety of optional

heatsinks are available for extended thermal operation.

DATASHEET

DS_H48SA12025_05052008

Summary of content (14 pages)

PAGE 1
FEATURES High efficiency: 93.2% @ 12V/ 25A Standard footprint: 58.4 x 61.0 x 11.2 mm (2.30” x2.40”x0.
PAGE 2
TECHNICAL SPECIFICATIONS (TA=25°C, airflow rate=300 LFM, Vin=48Vdc, nominal Vout unless otherwise noted.) PARAMETER NOTES and CONDITIONS H48SA12025 (Standard) Min.
PAGE 3
ELECTRICAL CHARACTERISTICS CURVES 95 30 90 25 EFFICIENCY (%) 85 POWER DISSIPATION (W) 75Vin 48Vin 36Vin 80 75 70 75Vin 20 48Vin 36Vin 15 10 5 65 0 60 5 10 15 20 0 25 5 10 OUTPUT CURRENT (A) Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. Vout=12V. 20 25 Figure 2: Power dissipation vs. load current for minimum, nominal, and maximum input voltage at 25°C. Vout=12V.
PAGE 4
ELECTRICAL CHARACTERISTICS CURVES 95 30 90 25 48Vin 85 EFFICIENCY (%) POWER DISSIPATION (W) 75Vin 36Vin 80 75 70 75Vin 20 48Vin 36Vin 15 10 5 65 0 60 5 10 15 20 0 25 5 10 15 20 25 OUTPUT CURRENT (A) OUTPUT CURRENT (A) Figure 5: Efficiency vs. output voltage for minimum, nominal, and maximum input voltage at 25°C, Vout=13.2V. Figure 6: Power dissipation vs. output voltage for minimum, nominal, and maximum input voltage at 25°C, Vout=13.2V.
PAGE 5
ELECTRICAL CHARACTERISTICS CURVES 0 0 0 Figure 9: Turn-on transient at zero load current, 4 ms/div; Top Trace: Vout, 5V/div; Bottom Trace: ON/OFF input, 5V/div. Figure 10: Output voltage response to step-change in load current, 200mV/div, 200us/div. 75%-50%-75% of Io, max, di/dt = 0.1A/µs. Load cap: 10µF, tantalum capacitor and 1µF ceramic capacitor. Scope measurement should be made using a BNC cable (length shorter than 20 inches).
PAGE 6
ELECTRICAL CHARACTERISTICS CURVES 0 0 Figure 13: Input Terminal Ripple Current, ic, at nominal input voltage and rated load current with 12µH source impedance and 100µF electrolytic capacitor, 500 mA/div, 2us/div. Copper Strip Figure 14: Input reflected ripple current, is, through a 12µH source inductor at nominal input voltage and rated load current, 20 mA/div, 2us/div.
PAGE 7
DESIGN CONSIDERATIONS Input Source Impedance The impedance of the input source connecting to the DC/DC power modules will interact with the modules and affect the stability. A low ac-impedance input source is recommended. If the source inductance is more than a few μH, we advise adding a 33 to 100 μF electrolytic capacitor (ESR < 0.7 Ω at 100 kHz) mounted close to the input of the module to improve the stability.
PAGE 8
FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit. If the output current exceeds the OCP set point, the modules will automatically shut down, and enter hiccup mode or latch mode, which is optional. For hiccup mode, the module will try to restart after shutdown. If the overload condition still exists, the module will shut down again. This restart trial will continue until the overload condition is corrected. Hiccup mode is default mode.
PAGE 9
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.
PAGE 10
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 Thermal Derating Heat can be removed by increasing airflow over the module.
PAGE 11
THERMAL CURVES H48SA12025(Standard) Output Current vs. Ambient Temperature and Air Velocity @Vin = 48V (Either Orientation) Output Current (A) 600LFM 25 500LFM 20 Natural Convection 15 100LFM 200LFM 10 300LFM 5 400LFM 0 25 30 35 40 45 50 55 60 65 70 75 80 Ambient Temperature 85 (℃) Figure 24: Temperature measurement location for openframe version - The allowed maximum hot spot temperature is defined at 122℃. Figure 26: Output current vs.
PAGE 12
MECHANICAL DRAWING (WITHOUT HEATSPREADER) Pin No. 1 2 3 4 5 6 7 8 9 Notes: 1 2 3 Name Function +Vin ON/OFF CASE -Vin -Vout -SENSE TRIM +SENSE +Vout Positive input voltage Remote ON/OFF Case pin Negative input voltage Negative output voltage Negative remote sense Output voltage trim Positive remote sense Positive output voltage Pins 1-4, 6-8 are 1.00mm (0.040”) diameter Pins 5 and 9 are 2.00mm (0.079”) diameter All pins are copper with Tin plating.
PAGE 13
MECHANICAL DRAWING (WITH HEATSPREADER) 13 DS_H48SA12025_05052008
PAGE 14
PART NUMBERING SYSTEM H 48 Form Factor S Input Number of Voltage Outputs H - HalfBrick 48V S- Single A 120 25 N N Product Series Output Voltage Output Current ON/OFF Logic Pin Length A - Advanced 120- 12V 25- 25A N - Negative P - Positive N - 0.145” F A Option Code F- RoHS 6/6 (Lead Free) A - Standard Functions H - with Heatspreader MODEL LIST Part Number H48SA12025NNFA INPUT 36V~75V OUTPUT 11A 12V EFF @ 100% LOAD 25A 93.2% CONTACT: www.delta.com.