HHD25 DC/DC Series Data Sheet 20/25A Half-Brick Features • 100/85 Watt total output power • Independently-regulated outputs • Flexible load distribution • Open-frame design with Insulated Metal Substrate • Low profile – 12.7mm height • High efficiency - 87% Applications • Output voltage tracking • Distributed power architectures • Output overcurrent protection • Telecommunications equipment • Output overvoltage protection • LAN/WAN applications • Overtemperature protection • Data processing applications • Setpoint accuracy ± 1.5% • Independent output voltage trim, positive or negative • Input/output isolation: 1500VDC • Basic insulation • UL 1950 Recognition, CSA 22.2 No. 950-95 certification, TUV IEC950 Description The HHD25 is a series of high density Half-brick size, High current, Dual output DC/DC converters with through- hole mounting. The products provide onboard conversion of standard telecom and datacom input voltages to two independently-regulated output voltages. Leading-edge technology provides extremely high efficiency and superior thermal performance which enables the products to deliver full-rated power at 55°C ambient temperature with only 200 LFM forced air without the addition of a heatsink. The outputs also track each other during both startup and shutdown. Model Selection Model Input Input Output Output Rated Output Ripple Typical Voltage Current, Voltage, Current, ADC and Noise, mV Efficiency Range, VDC Max, ADC VDC p-p % HHD20ZGE 36-72 3.6 5.0/3.3 20/20 100 87 HHD20ZGB 36-72 3.6 5.0/1.8 20/20 100 85 HHD25ZED 36-72 3.1 3.3/2.5 25/20 100 85 HHD25ZEB 36-72 3.1 3.3/1.8 25/20 100 84 HHD20YGE 18-36 7.2 5.0/3.3 20/20 100 85 REV. SEP 17, 2003 Page 1 of 8 HHD25 DC/DC Series Data Sheet 20/25A Half-Brick Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect long- term reliability, and cause permanent damage to the converter. Parameter Conditions/Description Min Max Units Input voltage Continuous 36 75 VDC Transient, 100ms 100 VDC Operating Temperature At 100% load -40 100 °C Storage Temperature -40 125 °C ON/OFF Control Voltage Referenced to -Vin 50 VDC Environmental and Mechanical Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Conditions/Description Min Nom Max Units Vibration Halfsine wave, 10-55 Hz, 3 axes, 5 g 5 min each Weight 2.3/68 Oz/g Water Washing Standard Process Yes MTBF Per Bellcore TR-NWT-000332 1,780 kHrs Isolation Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Conditions/Description Min Nom Max Units Insulation Safety Rating Basic Isolation Voltage 1500 VDC Isolation Resistance 10 MOhm Isolation Capacitance 3000 pF Input Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Conditions/Description Min Nom Max Units Input Voltage Continuous 36 48 75 VDC Turn-On Input Voltage Ramping Up 33 VDC Turn-Off Input Voltage Ramping Down 30 VDC Turn-On Time To Output Regulation Band 10 ms 100% Resistive Load Input Reflected Ripple Current Full Load, 12µH source inductance 80 mA p-p 2 Input Inrush Current Limit Vin=Vin.max 1 A s REV. SEP 17, 2003 Page 2 of 8 HHD25 DC/DC Series Data Sheet 20/25A Half-Brick Output Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Conditions/Description Min Nom Max Units Output Voltage Setpoint Accuracy Vin=Vin.nom, Full Load -1.5 1.5 %Vout Output Current* Vout1 For MAX see Table 2.0 ADC Output Current* Vout2 For MAX see Table 2.0 ADC Line Regulation Vout1 Vin.min to Vin.max, Iout.max 0.2 %Vout Line Regulation Vout2 Vin.min to Vin.max, Iout.max 1 %Vout Load Regulation,Vout1,Vout2 Vin=Vnom, Iout.min to Iout.max 1 %Vout Remote Sense Headroom 0.5 VDC Dynamic Regulation 50-75% load step change Peak Deviation 4 %Vout Settling Time to 1% error band 500 µs Admissible Load Capacitance Iout.max, Nom Vin 30,000 µF Output Current Limit Threshold** Vout≤0.97Vout.nom 115 140 %Iout Switching Frequency 270 kHz Overvoltage Protection, Over all input voltage and load 120 140 %Vout conditions Non Latching Trim Range Iout.max, Vin=Vnom 90 110 %Vout * At Iout