QLS20ZG-NT

QLS25 DC/DC Series Data Sheet 25A Quarter-Brick Features Applications • • • • Distributed power architectures Telecommunications equipment LAN/WAN applications Data processing applications • Cost-effective single board design • Low profile – 11 mm height • Input/output isolation: 1500VDC, basic insulation • High efficiency - up to 90% at full load • Start-up into high capacitive load • Low conducted and radiated EMI • Output overcurrent protection • Output overvoltage protection • Back drive protection • Overtemperature protection • Remote sense • Set point accuracy ± 1% • Remote on/off (primary referenced), positive or negative logic • Output voltage trim adjust, positive or negative • UL 1950 Recognition, CSA 22.2 No. 950-95 certification, TUV IEC950 Description The QLS25 is a new series of cost-effective, high-density single-output DC/DC converters providing onboard conversion of standard telecom and datacom input voltages into isolated low voltage outputs in a through-hole mounting package. High efficiencies and a patent-pending board design significantly improve thermal characteristics by evening out hot spots and enhance product reliability. Model Selection Model Input Voltage VDC Input Current, Max ADC QLS20ZG QLS25ZE QLS25ZD 36-75 36-75 36-75 4.8 3.3 2.5 Output Voltage Vout, VDC 5.0 3.3 2.5 Output Rated Current I rated, ADC 20 25 25 Output Ripple/Noise, mV p-p Typical Efficiency @ I rated, % 150 100 100 90 89 87 This product is intended for integration into end-use equipment. All the required procedures for CE marking of end-use equipment should be followed. REV. SEP 12, 2003 Page 1 of 8 QLS25 DC/DC Series Data Sheet 25A Quarter-Brick Absolute Maximum Ratings Stresses in excess of the absolute maximum ratings may cause performance degradation, adversely effect longterm reliability and cause permanent damage to the converter. Parameter Input voltage Operating Temperature Conditions/Description Continuous Transient, 100ms PC Board Temperature Min Storage Temperature ON/OFF Control Voltage Units VDC VDC -40 Max 75 100 100 -40 125 °C 50 VDC Referenced to -Vin °C Environmental and Mechanical Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Shock Sinusoidal Vibration Weight Water Washing MTBF Conditions/Description Halfsine wave, 3 axes GR-63-Core, Section 5.4.2 Min 50 1 Nom Max 1.2/35 Yes 1,980 Standard process Per Bellcore TR-NWT-000332 Units g g Oz/g kHrs Isolation Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Insulation Safety Rating Isolation Voltage Isolation Resistance Isolation Capacitance Conditions/Description Min Nom Basic Max 1500 10 1100 Units VDC MOhm pF Input Specifications All specifications apply over specified input voltage, output load, and temperature range, unless otherwise noted. Parameter Conditions/Description Min 36 Nom Max 48 75 Units Input Voltage Continuous Turn-On Input Voltage Ramping Up 33 VDC VDC Turn-Off Input Voltage Ramping Down 32 VDC Turn-On Time To Output Regulation Band 5 10 mS 100% Resistive Load Input Reflected Ripple Current Full Load, 12µH source inductance 60 mA p-p Inrush Transient Vin=Vin.max 0.1 As REV. SEP 12, 2003 Page 2 of 8 2 QLS25 DC/DC Series Data Sheet 25A Quarter-Brick Output Specifications All specifications apply over specified input voltage, output load and temperature range, unless otherwise noted. Parameter Conditions/Description Min Output Voltage Setpoint Accuracy Vin=Vin.nom, Full Load Output Current* See selection chart for Irated Line Regulation Nom Max Units -1 1 %Vout 10 100 %Irated Vin.min to Vin.max, Irated 0.2 %Vout Load Regulation Vin=Vin.nom, 10% to 100%Irated 0.2 %Vout Total output voltage regulation Over all input voltage, load, and temperature conditions 2 %Vout 0.5 VDC 5 %Vout 150 µs -2 Remote Sense Headroom Dynamic Regulation 50-75% load step change Peak Deviation Settling Time to 1% error band Admissible Load Capacitance Irated, Nom Vin 20,000 Output Current Limit Threshold** Vout≤0.97Vout.nom 110 Switching Frequency Overvoltage Protection, Non Latching Trim Range µF 140 270 %Irated kHz Over all input voltage and load conditions 120 140 %Vout Irated, Vin=Vnom 90 110 %Vout * At Iout