GS25/30T48 Family 25/30 W DC-DC CONVERTER FAMILY Vin Vout Iout GS25T48-5 36 to 72 V 5V 5A GS25T48-12 36 to 72 V 12 V 2,5 A GS25T48-15 36 to 72 V 15 V 2A Type FEATURES MTBF in excess of 1M hours at +45°C ambient temperature Wide input voltage range (36 to 72V) 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 GS25T48-5, GS30T48-12 and GS30T48-15 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 DC Input Voltage Input Transient Overvoltage (t ≤ 1sec.) Input Reverse Voltage Value Unit 34 to 72V V 90 V 100 V Tstg Storage Temperature Range -55 to +105 °C Top Operating Temperature Range -25 to +71 °C December 1993 1/5 GS25/30T48 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified) Symbol Parameter Test Conditions Typ Max Unit 36 48 72 V Vi Input Voltage Full Load Ii Input Current GS25T48-5 Full Load 640 GS30T48-12 Full Load 730 GS30T48-15 Full Load 730 Input Reflected Current Vi = 48V Full Load 50 mApp Input Short-circuit Current GS25T48-5 Vi = 48V 710 mA GS30T48-12 Vi = 48V 820 GS30T48-15 Vi = 48V 820 Iir Iisc Input Quiescent Current Vi = 48V Converter OFF Vinhl Low Inhibit Voltage Vi = 48V Full Load Vinhh High Inhibit Voltage Vi = 48V Full Load linh Input Inhibit Current Vi = 48V Full Load Vo Output Voltage GS25T48-5 Vi = 48V Full Load GS30T48-12 Vi = 48V Full Load GS30T48-15 Vi = 48V Full Load liq Vor Output Ripple and Noise Voltage Vi = 48V 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 = 36 to 72V Full Load ±0.001 % Load Regulation Vi = 48V Full Load to No Load ±0.05 % Output Overvoltage Protection GS25T48-5 Vi = 48V Full Load 6.8 GS30T48-12 Vi = 48V Full Load 15 GS30T48-15 Vi = 48V Full Load 18 δVo Remote Sense per Leg Vi = 36V Tc Temperature Coefficient Vi = 48V Full Load Operating Temperature Range V 0.5 V +0.02 %/°C GS25/30T48 FAMILY ELECTRICAL CHARACTERISTICS (Tamb = 25°C unless otherwise specified) (cont’d) Parameter Symbol Io Iosck Output Current Output Current Limit Test Conditions 0 2.5 GS30T48-15 Vi = 36 to 72V 0 2 GS25T48-5 Vi = 48V Overload GS30T48-12 Vi = 48V Overload GS30T48-15 Vi = 48V Overload Full Load 5.5 2.2 Vi = 48V Step Load Change δIo = 25% Vis Isolation Voltage Efficiency Rthc Thermal Resistance Case to Ambient A 2.75 Transient Recovery Time η A GS30T48-12 Vi = 36 to 72V trt Switching Frequency Unit 5 Vi = 48V fs Max 0 Soft-start Time Isolation Resistance Typ GS25T48-5 Vi = 36 to 72V tss R is Min 30 ms 75 µs 500 10 GS25T48-5 Vi = 48V Full Load GS30T48-12 Vi = 48V Full Load GS30T48-15 Vi = 48V Full Load Vdc Ω 9 150 kHz 81 % 86 86 4 °C/W 3/5 GS25/30T48 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 48V) must be applied between pins 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. GS25/30T48 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