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NPH25S2405I Datasheet(PDF) 1 Page - C&D Technologies |
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NPH25S2405I Datasheet(HTML) 1 Page - C&D Technologies |
1 / 2 page NPH25S SERIES Isolated 25W Single Output DC-DC Converters SELECTION GUIDE FEATURES ■ High Efficiency to 89% ■ Power Density up to 1.78W/cm3 (28W/in3 ) ■ 1.5kV Input to Output Isolation ■ Industry Standard Pinout ■ UL 1950 Recognised ■ Non Latching Current Limit ■ Constant 350kHz Frequency ■ Versatile Control Options ■ Continuous Rating to 30W at 60°C Without Heatsink ■ Operation to Zero Load ■ Protected Against All Load Faults ■ Internal Over Temperature Protection ■ Uses No Electrolytic Capacitors ■ UL 94V-0 Package Materials DESCRIPTION The NPH25S series of DC-DC Converters combines ease of application with versatility. The pin pattern is based on the popular industry standard, but two additional pins may optionally be fitted to provide a variety of features not commonly found on units of this type. High efficiency enables full rating to be achieved in a small package without heatsinking, and a high surge capability will provide for start-up and transient loads, whilst being thermally protected against sustained overload. Overload protection of the “constant current” type ensures start-up into complex load conditions. The copper case achieves efficient heat transfer and screening. The product range has been recognised by Underwriters Laboratory (UL) to UL 1950 for operational insulation, file number E179522 applies. Nominal Output Output Input Voltage Voltage Current Efficiency Order Code1 (V) (V) (A) (%) NPH25S2403i 24 3.4 7.3 81 NPH25S2405i 24 5.1 5.0 84 NPH25S2412i 24 12.1 2.1 86 NPH25S2415i 24 15.1 1.7 87 NPH25S4803i 48 3.4 7.3 83 NPH25S4805i 48 5.1 5.0 85 NPH25S4812i 48 12.1 2.1 88 NPH25S4815i 48 15.1 1.7 89 Parameter Conditions MIN NOM MAX Units Voltage Range Continuous operation, 24V input types 18 24 36 V Continuous operation, 48V input types 36 48 75 Parameter Conditions MIN TYP MAX Units Voltage Set 50% load 0.5 % Point Error Overall Case temperature –40°C to 110°C Voltage Error Load 0% - 100% 2.5 % Input specified range Temperature Coefficient of Output Voltage 250 ppm°C (slope) Deviation of Output Voltage Temperature MIN-MAX 0.5 1 % Line Regulation Operating voltage range, 50% load 0.1 % Load Regulation 0% - 100% rated load2 0.5 % Ripple rms 70 mV Input voltage, 24V input types –0.5V to 40V4 Input voltage, 48V input types –0.5V to 80V4 Output Voltage –0.3V to regulated voltage Output trim control –1V to +30V Synchronisation/shutdown control ±15V relative to input return INPUT CHARACTERISTICS OUTPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Voltage Trimming At rated load, ±10 % Range Trim control at either output Remote Switch Input3 Not operating -15 0 1.5 V (voltage relative to input negative) Operating, open circuit voltage 9 10 11 Start Delay Time from application of valid input voltage to output being in specification 25 50 mS Synchronisation3 Specified drive signal 320 440 kHz Switching Frequency 330 350 395 kHz CONTROL CHARACTERISTICS ABSOLUTE MAXIMUM RATINGS ISOLATION CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Isolation Voltage Flash tested for 1 second 1500 VDC Resistance Viso=500VDC 1 4000 GΩ 11 If optional pins ADJ and SS are required (as indicated in the pin connections diagram) prefix the ending “i” with an E when ordering, e.g. NPH25S4803Ei. 2A minimum load of 10% of rating is recommended for typical applications. 3 Optional where fitted. 4 Absolute maximum value for 30 seconds. Prolonged operation may damage the product. All specifications typical at TA=25°C, nominal input voltage and rated output current unless otherwise specified. www.cdpoweronline.com |
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