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| GS1T70-D540F ISDN DC-DC CONVERTER (FRENCH VERSION) Type GS1T70-D540F Vi 25 to 115 V Vo 5V 40 V Io 90 mA 10,5 mA FEATURES Wide operating line termination battery voltage Peak input overvoltage withstand: 1kV for 1.2/50s Peak overvoltage withstand on Output 2 (40V): 250V for 10/700s Positive or negative input voltage polarity Input and output filtering Short-circuit protection on both outputs Input power during shortcircuit within specification Minimum current drain during stand-by condition: 10A for Vi<18V Undervoltage lock out at 10V Input-output isolation voltage: 10 kV pulse 1,2/50 seconds Output1-output2isolation voltage: 2000VRMS for 60 seconds Mechanical dimensions (L x W x H): 56 mm x 56 mm x 18 mm (2.2" x 2.2" x 0.71") DESCRIPTION The GS1T70-D540F converter has been designed for the "U" interface of an ISDN-NTBA (Network Termination Basic Access) system with either 4B3T or 2B1Q standard trasmission. It meets the requirements of the following specifications: EN 60950 CCITT I.430 CCITT G.960 CCITT G.961 ETS 300 002 ETS 300 012 ETS 300 047 (ISDN BASIC ACCESS, Safety and Protection) Two isolated outputs, 5V/90mA and 40V/10.5mA are supplied. The converter offers short-circuit protection (short-circuit on 40V output doesn't affect 5V output and the input power never exceeds the June 1994 limit of the specification), input either voltage polarity, 80% minimum efficiency at maximum load, input and output filtering to meet very stringent noise requirements. The input and the output 2 (40V) stages are protected against differential overvoltage up to 1kV (1.2/50s) and 250V (10/700s) respectively. When the input voltage is below 18V, the converter offers a very high input impedance and a maximum quiescent current of 10A. These features allow the converter to operate directly connected to the telephone line without any external components. In addition, the wide operating input voltage range allows it to operate within the whole range of LT (Line Termination) battery voltage and its relevant line resistance. 2000VRMS isolation voltage for 60 second is provided between input to outputs and between output 1 and output 2. 1/4 GS1T70-D540F ELECTRICAL CHARACTERISTICS (Tamb = 25C unless otherwise specified) Std. Conditions: Line Termination voltage: 90 to 110V 105 to 115V Symbol Vi Vipk Vist Viuv Vo1 Vo2 Vor1 Vor2 eN Io1 Io1I Io2 Iosc2 Vis Parameter Input Voltage Input Transient Overvoltage Start Up Input Voltage Input Undervoltage Lockout Output Voltage 1 Output Voltage 2 Output Ripple Voltage 1 Output Ripple Voltage 2 Input Noise Voltage Output Current 1 Output Current 1 Limit Initiation Output Current 2 Output 2 Short Circuit Current Isolation Voltage (pulse) Operating Ambient Temperature Range Storage Temperature Range Std. Conditions Std. Conditions Std. Conditions BW = 0 to 20MHz Std. Conditions BW = 0 to 20MHz Std. Conditions BW = 0 to 20MHz Std. Conditions Io2 = 0 to 10.5 mA Vo1 = 5V Std. Conditions Vo1 = 4.75 to 5.25V Std. Conditions Io1 = 2 to 90 mA Vo2 = 40V Std. Conditions Output Shorted (Indefinite time) 2 110 0 9 Line Resistance (Rs): 50 to 1400 500 to 1900 Min 25 Typ Max 115 1 28 10 4.75 34 5 40 5 10 10 5.25 42 20 30 30 90 130 10.5 14 44 Unit V kV V V V V mVpp mVpp mVpp mA mA mA mA VRMS C C Test Conditions Std. Conditions t = 1.2/250s (pulse) See fig. 2 Input to Output 1 t = 1.2/50 s 10000 Input to Output 2 t = 1.2/50 s 10000 Output 1 to Output 2 t = 1.2/50 s 4000 0 - 40 +75 +85 Top Tstg OUTPUT POWER CHARACTERISTICS LT (Line Termination Voltage) = 90V to 110V Rs (Line Resistance) = 50 to 1400 Max Input Power (mW) 600 1150 200 270 1150 Min Min Output Output Power 1 Power 2 (5V)[mW] (40V)[mW] 420 450 110 110 450 0 420 0 60 Short circuit LT (Line Termination Voltage) = 105V to 115V Rs (Line Resistance) = 500 to 1900 Max Input Power (mW) 600 1150 200 270 1150 Min Min Output Output Power 1 Power 2 (5V)[mW] (40V)[mW] 420 450 110 110 450 0 420 0 60 Short circuit NT Status NT Status Activated Activated Emergency Deactivated Deactivated Emergency Activated with 40 V Short circuit Activated Activated Emergency Deactivated Deactivated Emergency Activated with 40V Short circuit 2/4 GS1T70-D540F CONNECTION DIAGRAM AND MECHANICAL DATA Figure 1. Package V. Dimensions in mm (inches). PIN DESCRIPTION Pin 1 2 3 4 5 6 Input (either polarity). Input (either polarity). +5V Output. Return for +5V Output. +40V Output. Return for +40V Output. Description 3/4 GS1T70-D540F VOLTAGE SUPPLY OPERATING AREA Figure 2 shows the Voltage Supply Operating area during the switch ON-OFF and OFF-ON sequence. - Switch ON-OFF sequence: For an Input Voltage Vi > 25V, the circuit operates correctly, because it lies in the Voltage Supply Operating Area. The converter goes in High Input Impedance mode (Iq < 10A) when the Vi is lower than 10V. If Vi remains between 0 -10V range for almost for almost 100 ms, the converter is in OFF condition. - Switch OFF-ON sequence: The quiescent current Iq remains below 10A if Vi is lower than 18V. The start-up voltage is between 34 to 44V. After 1 ms in this condition, the converter is in Voltage Supply Operating Area (Vin = 25 to 115V). Figure 2. Vi 115V Voltage Supply Operating Area 44V 34V Voltage Supply Operating Area 25V 18V 10V Iq < 10 A Area 0V Iq < 10 A Area t t>1mS t>100mS 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. 4/4 |
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