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GS300T48-5
300W DC-DC CONVERTER
Type GS300T48-5 Vi 38 to 60 V Vo 5,075 V Io 60 A
FEATURES Very high output power (300W) High efficiency (80% min.) Parallel operation with current sharing Synchronization pin Remote ON/OFF Remote load voltage sense compensation Output short-circuit protection Output overvoltage protection Thermal protection Undervoltage lock-out Minimal overshoot during load transients 500 VDC input to output isolation Internal input and output filtering Softstart PCB or chassis mountable DESCRIPTION The GS300T48-5 is a 300W DC-DC converters used to generate a 5.075V isolated output with a current of 60A from a wide range input voltage (38 to 60V). SELECTION GUIDE
Type Ordering Number Input Voltage (V) Output Voltage (V) Output Current (A) Dimensions L * W * H mm (inches) 125 * 66.5 * 20 ( 4.92 * 2.62 * 0.79) The suffix E identifies the metric threading on the planar heatsink (see fig. 1).
GS300T48-5 38 to 60 GS300T48-5E 5.075 60
June 1994
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GS300T48-5
ELECTRICAL CHARACTERISTICS (Tamb = 25C unless otherwise specified)
Symbol Vi Viuv li lipk lir Vien lien Viinh Pi Vo Vost Vots Vol Vor Von Vo Vo Io Iol Iosc ts ton Parameter Input Voltage Input Undervoltage Lockout Average Input Current Inrush Transient Peak Current Reflected Input Current Enable Input Voltage Enable Input Current Max Inhibit Voltage Input Power Total Output Voltage Regulation Short-term Output Voltage Regulation Total Static Output Voltage Regulation Output Overvoltage Limit Initiation Output Ripple Voltage Output Noise Voltage Total Remote Sense Compensation Peak Load Transient Response Output Current Overcurrent Limit Initiation Shortcircuit Output Current Load Transient Setting Time Turn-on Time Test Conditions Vo = 5.075V Io = 0 to 30A (Operating Conditions) Io = 0 to 60A Vi = 48V Io = 60A Vi = 60V Io = 60A Vi = 48V Io = 60A BW = 5Hz to 20MHz (see fig. 2) Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 0 to 60A Vien = 0V Vi = 38 to 60V Io = 0 to 60A Vien = open Vi = 38 to 60V Io = 0A (No Load) Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 60A BW = 0 to 20 Mhz Vi = 38 to 60V Io = 60A BW = 0 to 20 Mhz Vi = 38 to 60V Vi = 48V Io = 10A slope = 0.1A/s Vi = 38 to 60V Vo = 5V Vi = 48V Vi = 48V Vi = 48V Io = 10A slope = 0.1A/s Vi = 38 to 60V Io = 0 to 60A Vien = from high to low Vi = 0 to 60V Vien = low Vis fs R th Tcop Tstg Isolation Voltage Switching Frequency Efficiency Thermal Resistance Operating Case Temperature Range* Storage Temperature Range Vi = 38 to 60V Io = 0 to 60A Vi = 38 to 60V Io = 60A Case to Ambient 0 - 40 Io = 0 to 60A 500 160 80 180 81 5.2 +70 +105 200 0 63 69 250 10 10 V kHz % C/W C C 4.490 5.002 4.970 8 1.5 5.075 5.075 5.075 6.3 50 100 0.6 100 60 0 Min 38 29 Typ 48 Max 60 36 7.8 0.3 30 1.2 -1 18 2 5.210 5.148 5.180 Unit VDC V A A2 s mApp V mA V W V V V V mVpp mVpp V mVp A A A s ms
* Thermal intervention @ Tcop = 85C
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GS300T48-5
CONNECTION DIAGRAM AND MECHANICAL DATA Figure 1.
Package U. Dimensions in mm (inches) PIN DESCRIPTION
Pin 1,2 3,4 5 6 7 Function - Vin + Vin SYNC PARALLEL ON/OFF Negative input voltage. Positive input voltage. Unregulated input voltage (typically 48V) must be applied between pin 1,2-3,4. Synchronization pin. See figures 3, 4, 5, 6. Open when not used. Parallel output. See figures 3, 4, 5, 6. Open when not used. The converter is ON (Enable) when the voltage applied to this pin with reference to pin 1,2 is lower than 1,2 V (see Vien). The converter is OFF (Inhibit) for a control voltage in the range of 8 to 18V. When the pin is unconnected the converter is OFF (Inhibit). Case connection pin Senses the remote load high side. To be connected to pin 15,16,17 when remote sense is not used. Senses the remote load return. To be connected to pin 11,12,13,14 when remote sense is not used. In parallel configuration, take care to connect all -SENSE pins together (see figures 3,4,5,6). -5V voltage return. +5V output voltage. 3/6 Description
8 9 10 11,12, 13,14 15,16, 17
CASE + SENSE - SENSE - OUT + OUT
GS300T48-5
USER NOTES Reflected Input Current The reflected input current measurement (lir, see Electrical Characteristics) is performed according to the test set-up of fig. 2.
Figure 2.
Softstart To avoid heavy inrush current the output voltage rise time is 10ms maximum in any condition of load. Remote Sensing The remote voltage sense compensation range is for a total drop of 0.6V equally shared between the load connecting wires. It is a good practice to shield the sensing wires to avoid oscillations. See the connection diagram on figures 3, 4, 5, 6. Remote ON/OFF The module is controlled by the voltage applied between the ON/OFF pin and -IN pin. The converter is ON (Enable) when the voltage applied is lower than 1.2 V (see Vien on Electrical Characteristics). The converter is OFF (Inhibit) for a control voltage in the range of 8 to 18V (see Viinh).
When the pin is unconnected the converter is OFF. Maximum sinking current is 1mA. Module Protection The module is protected against occasional and permanent shortcircuits of the output pins to ground, as well as against output current overload. It uses a current limiting protection circuitry, avoiding latch-up problems with certain type of loads. A latching crowbar output overvoltage protection is activated when the output voltage exceeds the typical value of 6.3V (see Electrical Characteristics). A thermal non-latchingprotection disables the module whenever the heatsink temperature reaches about 85C. Parallel Operation To increase available output regulated power, the module features the parallel connection possibility with equal current sharing and maximum deviation of 10% (two modules in parallel). See the connection diagram on figures 3, 4, 5, 6.
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GS300T48-5
Figure 3. Figure 4.
Figure 5.
Figure 6.
Thermal Characteristics The case-to-ambient thermal resistance of the GS300T48-5 module is 5.2C/W typical. It may be decreased, improving the convection cooling, by mounting an external heatsink to the top of the unit heatsink (fig. 9).
Six threaded holes, # 4-40 UNC on the standard or # M3 on the E version, 5 mm (0,2") maximum deep, are provided for this purpose (see fig. 1).
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GS300T48-5
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 - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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