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Delphi Series H48SN, 350W Half Brick Family
DC/DC Power Modules: 48V in, 28V/12.5A out
The Delphi Series H48SN Half Brick, 48V input, single output,
isolated 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 350 watts of power in an
industry standard footprint. It provides 91% efficiency for 28V at full
load. 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. All models are fully protected
from abnormal input/output voltage, current, and temperature
conditions.
The
Delphi
requirements with basic insulation. A variety of optional heatsinks are
available for extended thermal operation as well as for use in higher
air flow applications: 200 to 400 LFM.
DATASHEET
DS_H48SN28
012_01172008
Series
converters
meet
all
safety
FEATURES
High Efficiency: 91.0% @ 28V/12.5A
Size: 61.0x57.9x12.7mm (2.40"×2.28"×0.50")
Standard footprint
Industry standard pin out
Fixed frequency operation
Metal baseplate
Input UVLO, Output OCP, OVP, OTP
Basic insulation
2250V isolation
2:1 Input voltage range
ISO 9001, TL 9000, ISO 14001, QS9000,
OHSAS18001 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
directive
OPTIONS
Positive Remote On/Off logic
Short pin lengths available
APPLICATIONS
Telecom / Datacom
Wireless Networks
Optical Netw
ork Equipment
Server and D
ata Storage
Industrial / Testing Equipment
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Summary of Contents for Delta Electronics H48SN
- Page 1 Delphi Series H48SN, 350W Half Brick Family DC/DC Power Modules: 48V in, 28V/12.5A out The Delphi Series H48SN Half Brick, 48V input, single output, isolated DC/DC converters are the latest offering from a world leader in power systems technology and manufacturing -- Delta Electronics, Inc.
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Page 2: Technical Specifications
TECHNICAL SPECIFICATIONS =25°C, airflow rate=600 LFM, V =48Vdc, nominal Vout unless otherwise noted.) PARAMETER ABSOLUTE MAXIMUM RATINGS Input Voltage Continuous Transient (100ms) Operating Temperature Storage Temperature Input/Output Isolation Voltage INPUT CHARACTERISTICS Operating Input Voltage Input Under-Voltage Lockout Turn-On Voltage Threshold Turn-Off Voltage Threshold Lockout Hysteresis Voltage Maximum Input Current... - Page 3 ELECTRICAL CHARACTERISTICS CURVES 36Vin 48Vin Figure 1: Efficiency vs. load current for minimum, nominal, and maximum input voltage at 25°C. 14.0 Io=12.5A 12.0 10.0 Figure 3: Typical input characteristics at room temperature H48SN28012_01172008 45.0 75Vin 40.0 35.0 30.0 25.0 20.0 15.0 10.0 OUTPUT CURRENT (A)
- Page 4 ELECTRICAL CHARACTERISTICS CURVES For Negative Remote On/Off Logic Figure 4: Turn-on transient at full rated load current (resistive load) (10ms/div). CH3: Vout;5V/div; CH1: ON/OFF input: 2V/div For Positive Remote On/Off Logic Figure 6: Turn-on transient at full rated load current (resistive load) (10ms/div).
- Page 5 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: 330µF aluminum,10uF Low ESR capacitor and 1µF ceramic capacitor. Top Trace: Vout (100mV/div), Bottom Trace: Iout (5A/div). Scope measurement should be made using a BNC cable (length shorter than 20 inches).
- Page 6 ELECTRICAL CHARACTERISTICS CURVES Figure 11: Input Terminal Ripple Current, i current and nominal input voltage with 12µH source impedance and 220µF electrolytic capacitor (1A/div). Copper Strip Vo(+) Vo(-) Figure 13: Output voltage noise and ripple measurement test setup H48SN28012_01172008 , at full rated output Figure 12: Input reflected ripple current, i source inductor at nominal input voltage and rated load current (10 mA/div)
- Page 7 ELECTRICAL CHARACTERISTICS CURVES Figure 14: Output voltage ripple at nominal input voltage and rated load current (20 mV/div). Load capacitance:330uF aluminum, 1µF ceramic capacitor and 10µFlow ESR capacitor. Bandwidth: 20 MHz. Scope measurement 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 module.
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Page 8: Design Considerations
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 220 to 470 μF electrolytic capacitor (ESR <... -
Page 9: Features Descriptions
FEATURES DESCRIPTIONS Over-Current Protection The modules include an internal output over-current protection circuit, which will endure current limiting for an unlimited duration during output overload. If the output current exceeds the OCP set point, the modules will automatically shut down (hiccup mode). The modules will try to restart after shutdown. - Page 10 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.
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Page 11: Thermal Considerations
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. -
Page 12: Mechanical Drawing
MECHANICAL DRAWING Pin No. Name -Vin CASE ON/OFF +Vin +Vout +SEN TRIM -SENSE -Vout Pin S ecificatio Pins 1-4, 6-8 1.00mm (0.040”) diameter Pins 5 & 9 2.00mm (0.079”) diameter All pins are copper with Tin pla ting. H48SN28012_01172008 Function gative input volt se ground Remote ON/OFF... -
Page 13: Part Numbering System
PART NUMBERING SYSTEM Form Input Number of Product Factor Voltage Outputs Series H- Half S- Single N- 350W Brick MODEL LIST MODEL NAME H48SN28012NRFA 36V~75V Default remote on/off logic is negative and pin length is 0.170” For different remote on/off logic and pin length, please refer to part numbering system above or contact your local sales CONTACT www.delta.com.tw/dcdc USA:...