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| GS25/30T24 Family 25/30 W DC-DC CONVERTER FAMILY Type GS25T24-5 GS30T24-12 GS30T24-15 Vin 18 to 36 V 18 to 36 V 18 to 36 V Vout 5V 12 V 15 V Iout 5A 2,5 A 2A FEATURES MTBF in excess of 1M hours at +45C ambient temperature Wide input voltage range (18 to 36V) No external component required High efficiency (see data) Non latching permanent short-circuit protection Overvoltage protection Redundant operation Remote output voltage sense Remote INHIBIT/ENABLE Soft-start Minimized reflected input current Reverse input polarity protection Peak input overvoltage withstand No derating over the temperature range 500VDC minimum isolation between input and output PCB or chassis mountable DESCRIPTION The GS25T24-5, GS30T24-12 and GS30T24-15 are isolated DC-DC converters designed for general purpose application. ABSOLUTE MAXIMUM RATINGS Symbol Vi Vipk Vir Tstg Top DC Input Voltage Input Transient Overvoltage (t 1sec.) Input Reverse Voltage Storage Temperature Range Operating Temperature Range Parameter Value 17 to 38V 45 50 -55 to +105 -25 to +71 Unit V V V C C The output power is in the range of 25W to 30W. To ensure very long life, these converters do not use electrolytic aluminum capacitors or optoelectronic feedback systems. December 1993 1/5 GS25/30T24 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25C unless otherwise specified) Symbol Vi Ii Parameter Input Voltage Input Current Test Conditions Full Load GS25T24-5 GS30T24-12 GS30T24-15 Iir Iisc Input Reflected Current Input Short-circuit Current Vi = 24V GS25T24-5 Vi = 24V GS30T24-12 Vi = 24V GS30T24-15 Vi = 24V liq Vinhl Vinhh linh Vo Input Quiescent Current Low Inhibit Voltage High Inhibit Voltage Input Inhibit Current Output Voltage Vi = 24V Converter OFF Vi = 24V Vi = 24V Vi = 24V GS25T24-5 Vi = 24V GS30T24-12 Vi = 24V GS30T24-15 Vi = 24V Vor Vo Vo Voov Output Ripple and Noise Voltage Line Regulation Load Regulation Output Overvoltage Protection Vi = 24V Full Load Vi = 18 to 36V Full Load Vi = 24V Full Load to No Load GS25T24-5 Vi = 24V GS30T24-12 Vi = 24V GS30T24-15 Vi = 24V Vo Tc Remote Sense per Leg Temperature Coefficient Vi = 18V Vi = 24V Full Load Operating Temperature Range Full Load Full Load Full Load Full Load Full Load Full Load 4.95 Full Load 11.88 Full Load 14.85 Full Load 10 0.001 0.05 6.8 15 18 0.5 +0.02 V %/C mVpp % % V 15.00 15.15 12.00 12.12 1.8 (open) 1 5.00 5.05 Full Load Full Load Min 18 Typ 24 1370 1600 Max 36 Unit V mA Full Load 40 360 220 200 5 1.2 mApp mA mA V V mA V 2/5 GS25/30T24 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25C unless otherwise specified) (cont'd) Symbol Io Parameter Output Current Test Conditions GS25T24-5 Vi = 18 to 36V GS30T24-12 Vi = 18 to 36V GS30T24-15 Vi = 18 to 36V Iosck Output Current Limit GS25T24-5 Vi = 24V GS30T24-12 Vi = 24V GS30T24-15 Vi = 24V tss trt Vis fs Soft-start Time Transient Recovery Time Isolation Voltage Switching Frequency Efficiency GS25T24-5 Vi = 24V GS30T24-12 Vi = 24V GS30T24-15 Vi = 24V R is Rthc Isolation Resistance Thermal Resistance Case to Ambient 75 Full Load 79 Full Load 80 Full Load 109 4 C/W 83 82 Vi = 24V Overload 2.75 Overload 2.2 Overload Full Load 30 75 500 150 78 ms s Vdc kHz % Min 0 0 0 Typ Max 5 2.5 2 5.5 A Unit A Vi = 24V Step Load Change Io = 25% 3/5 GS25/30T24 FAMILY CONNECTION DIAGRAM AND MECHANICAL DATA Package F. Dimensions in mm. (inches) PIN DESCRIPTION Pin 1 2 - IN + IN Function Negative input voltage. Positive input voltage. Unregulated input voltage (typically 24V) must be applied between pin 1-2. The input section of the DC-DC converter is protected against reverse polarity by a series diode. No external fuse is required. Input is filtered by a Pi network. Logically compatible with CMOS or open collector TTL. The converter is ON (Enable) when the voltage applied to this pin with reference to pin 1 is higher than 1.8V. The converter is OFF (Inhibit) for a control voltage lower than 1.2V. When the pin is unconnected the converter is ON (Enable). Senses the remote load high side. To be connected to pin 6 when remote sense is not used. Senses the remote load return. To be connected to pin 7 when remote sense is not used. Output voltage. Output voltage return. Description 3 ON/OFF 4 5 6 7 + SENSE - SENSE + OUT - OUT 4/5 GS25/30T24 FAMILY Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 5/5 |
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