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| NPH25S SERIES Isolated 25W Single Output DC-DC Converters SELECTION GUIDE Nominal Input Voltage Output Voltage Output Current Efficiency Order Code1 NPH25S2403i NPH25S2405i NPH25S2412i NPH25S2415i NPH25S4803I NPH25S4805i NPH25S4812i NPH25S4815i (V) 24 24 24 24 48 48 48 48 (V) 3.4 5.1 12.1 15.1 3.4 5.1 12.1 15.1 (A) 7.3 5.0 2.1 1.7 7.3 5.0 2.1 1.7 (%) 81 84 86 87 83 85 88 89 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 60C 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. INPUT CHARACTERISTICS Parameter Conditions MIN NOM MAX Units Voltage Range Continuous operation, 24V input types Continuous operation, 48V input types 18 36 24 48 36 75 V OUTPUT CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Voltage Set Point Error Overall Voltage Error Temperature Coefficient of Output Voltage (slope) Deviation of Output Voltage Line Regulation Load Regulation Ripple 50% load Case temperature -40C to 110C Load 0% - 100% Input specified range 0.5 2.5 250 % % ppmC % % % mV Temperature MIN-MAX Operating voltage range, 50% load 0% - 100% rated load2 rms 0.5 1 0.1 0.5 70 CONTROL CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Voltage Trimming Range Remote Switch Input 3 (voltage relative to input negative) At rated load, Trim control at either output Not operating Operating, open circuit voltage Time from application of valid input voltage to output being in specification Specified drive signal 10 -15 9 0 10 25 320 330 350 1.5 11 50 440 395 % V mS kHz kHz Start Delay Synchronisation3 Switching Frequency ABSOLUTE MAXIMUM RATINGS Input voltage, 24V input types Input voltage, 48V input types Output Voltage Output trim control Synchronisation/shutdown control -0.5V to 40V4 -0.5V to 80V4 -0.3V to regulated voltage -1V to +30V 15V relative to input return ISOLATION CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Isolation Voltage Resistance Flash tested for 1 second Viso=500VDC 1500 1 4000 VDC G 1 1 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. 2 A 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=25C, nominal input voltage and rated output current unless otherwise specified. www.cdpoweronline.com NPH25S SERIES Isolated 25W Single Output DC-DC Converters ENVIRONMENTAL Parameter Conditions MIN TYP MAX Units Case Temperature Storage Relative Humidity Thermal Protection Full load Absolute MAX internal temperature Non condensing 85C Operates at case temperature -40 -40 110 110 125 85 C C % C THERMAL CHARACTERISTICS UL 1950 recognition MAX permissible loads for a given ambient temperature for any NPH25S model THERMAL PERFORMANCE 35 30 2415 2412 2405 2403 Output Power (W) Temperature (C) Power (W) Temperature (C) Power (W) 25 20 15 10 5 0 -40 35 30 -20 0 20 40 60 80 40 50 60 70 25.0 22.2 19.4 16.6 80 85 90 13.9 12.5 11.1 MAX power rating with case temperature maintained by external means (eg forced air cooling) Case Temperature Ambient Temperature (C) 100 120 Part Number NPH25S2403 NPH25S2405 NPH25S2412 NPH25S2415 NPH25S4803 NPH25S4805 NPH25S4812 NPH25S4815 100C 24 25 30 30 25 25 30 30 105C 20 22 24 27 20 24 29 30 110C 15 18 21 22 16 20 24 26 Units Output Power (W) 4815 4812 4805 4803 W 25 20 15 10 5 0 -40 -20 0 20 40 60 80 W Ambient Temperature (C) 100 120 MECHANICAL DIMENSIONS 1.97 (50.00) BOTTOM VIEW 0.20 (5.08) 1.38 (35.00) 0.20 (5.08) 0.59 (14.96) SS +VIN -VIN +V OUT 0.29 (7.34) 0.80 (20.32) ADJ 0V 0.39 (10.00) 0.18 (4.50) 0.15 (3.70) 0.20 (5.08) 0.58 (14.84) 0.80 (20.32) O 0.04 (1.04) 0.04 (0.90) Weight: 45g All dimensions in Inches (mm) 0.01 (0.25) All pins on a 0.10 (2.54) pitch and within 0.01 (0.25) of true position * Optional C&D Technologies (NCL) Limited reserve the right to alter or improve the specification, internal design or manufacturing process at any time, without notice. Please check with your supplier or visit our web site to ensure that you have the current and complete specification for your product before use. For information and instructions on use, please consult the NPH SERIES APPLICATION NOTES. (c) C&D Technologies (NCL) Limited 2002 NDC NPH25S.5 No part of this publication may be copied, transmitted or stored in a retrieval system or reproduced in any way including, but not limited to, photography, photocopy, magnetic or other recording means, without prior written permission from C&D Technologies (NCL) Limited. Instructions for use are available from www.cdpoweronline.com C&D Technologies (NCL) Ltd Tanners Drive, Blakelands North Milton Keynes MK14 5BU, England Tel: +44 (0)1908 615232 Fax: +44 (0)1908 617545 email: info@cdtechno-ncl.com www.cdpoweronline.com C&D Technologies Inc. 3400 E Britannia Drive, Tucson, Arizona 85706, USA Tel: +1 (800) 547-2537 Fax: +1 (520) 741-4598 email: sales@cdtechno.com |
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