GS25/30T24 Family 25/30 W DC-DC CONVERTER FAMILY Vin Vout Iout GS25T24-5 18 to 36 V 5V 5A GS30T24-12 18 to 36 V 12 V 2,5 A GS30T24-15 18 to 36 V 15 V 2A Type FEATURES MTBF in excess of 1M hours at +45°C 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. 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. ABSOLUTE MAXIMUM RATINGS Symbol Vi Vipk Vir Parameter Value Unit 17 to 38V V Input Transient Overvoltage (t ≤ 1sec.) 45 V Input Reverse Voltage 50 V DC Input Voltage Tstg Storage Temperature Range -55 to +105 °C Top Operating Temperature Range -25 to +71 °C December 1993 1/5 GS25/30T24 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified) Symbol Parameter Test Conditions Typ Max Unit 18 24 36 V Vi Input Voltage Full Load Ii Input Current GS25T24-5 Full Load 1370 GS30T24-12 GS30T24-15 Full Load 1600 Input Reflected Current Vi = 24V Full Load 40 mApp Input Short-circuit Current GS25T24-5 Vi = 24V 360 mA GS30T24-12 Vi = 24V 220 GS30T24-15 Vi = 24V 200 Iir Iisc Input Quiescent Current Vi = 24V Converter OFF Vinhl Low Inhibit Voltage Vi = 24V Full Load Vinhh High Inhibit Voltage Vi = 24V Full Load linh Input Inhibit Current Vi = 24V Full Load Vo Output Voltage GS25T24-5 Vi = 24V Full Load GS30T24-12 Vi = 24V Full Load GS30T24-15 Vi = 24V Full Load liq Vor Output Ripple and Noise Voltage Vi = 24V Full Load δVo Line Regulation δVo Voov 2/5 Min mA 5 mA 1.2 1.8 (open) V V 1 mA 4.95 5.00 5.05 11.88 12.00 12.12 14.85 15.00 15.15 V 10 mVpp Vi = 18 to 36V Full Load ±0.001 % Load Regulation Vi = 24V Full Load to No Load ±0.05 % Output Overvoltage Protection GS25T24-5 Vi = 24V Full Load 6.8 GS30T24-12 Vi = 24V Full Load 15 GS30T24-15 Vi = 24V Full Load 18 δVo Remote Sense per Leg Vi = 18V Tc Temperature Coefficient Vi = 24V Full Load Operating Temperature Range V 0.5 V +0.02 %/°C GS25/30T24 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified) (cont’d) Parameter Symbol Io Iosck Output Current Output Current Limit Test Conditions A GS30T24-12 Vi = 18 to 36V 0 2.5 GS30T24-15 Vi = 18 to 36V 0 2 GS25T24-5 Vi = 24V Overload GS30T24-12 Vi = 24V Overload GS30T24-15 Vi = 24V Overload Full Load 5.5 A 2.75 2.2 trt Transient Recovery Time Vi = 24V Step Load Change δIo = 25% Vis Isolation Voltage fs Switching Frequency η Efficiency Thermal Resistance Case to Ambient Unit 5 Vi = 24V Rthc Max 0 Soft-start Time Isolation Resistance Typ GS25T24-5 Vi = 18 to 36V tss R is Min 30 ms 75 µs 500 GS25T24-5 Vi = 24V Full Load GS30T24-12 Vi = 24V Full Load GS30T24-15 Vi = 24V Full Load Vdc 150 kHz 75 78 % 79 82 80 83 Ω 109 4 °C/W 3/5 GS25/30T24 FAMILY CONNECTION DIAGRAM AND MECHANICAL DATA Package F. Dimensions in mm. (inches) PIN DESCRIPTION Pin 4/5 Function Description 1 - IN Negative input voltage. 2 + IN 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. 3 ON/OFF 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). 4 + SENSE Senses the remote load high side. To be connected to pin 6 when remote sense is not used. 5 - SENSE Senses the remote load return. To be connected to pin 7 when remote sense is not used. 6 + OUT Output voltage. 7 - OUT Output voltage return. 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. 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