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76253 Datasheet(PDF) 1 Page - C&D Technologies |
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76253 Datasheet(HTML) 1 Page - C&D Technologies |
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1 / 2 page  FEATURES s Maxim Compatible s BS EN 60950 Approved s Isolation to 6kV s Toroidal Construction s Industry Standard Pinout s UL 94V-0 Package Material s Fully Encapsulated DESCRIPTION The 76250EN converter transformer is specifically designed for use with Maxim chipsets to provide isolated RS232 interfaces. A carefully controlled turns ratio ensures consistent performance whilst a toroidal construction minimises EMI. The 76253/XXEN converter transformers are specifically designed for use with the MAX253 chipset to provide isolated power supplies. The 5V version can supply 1W and the 3.3V version can supply 500mW. A centre tapped secondary winding allows for full bridge, half bride or voltage doubling. The devices are fully approved to BS EN 60950 for use in telecoms applications. 76250EN CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Primary Inductance, LP 10kHz, 100mV 1.0 2.0 2.5 mH Leakage Inductance, LL 100kHz, 100mV 35 40 µH Interwinding Capacitance, CWW 100kHz, 100mV 5.0 10 pF D.C. Resistance, RDC <0.1VDC 1.0 2.0 Ω Volt-time Product, ET 5kHz, 5V 50 Vµs 76253/35EN CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Primary Inductance, LP 100kHz, 250mV 53 92 120 µH Secondary Inductance, L S 100kHz, 250mV 350 460 600 µH Leakage Inductance, LL 100kHz, 250mV 1.5 3.6 µH Interwinding Capacitance, CWW 100kHz, 250mV 1.80 3.00 pF D.C. Resistance, RDC >0.1VDC 0.60 1.00 Ω Volt-time Product, ET 5kHz, 5V 20 35 Vµs 76253/55EN CHARACTERISTICS Parameter Conditions MIN TYP MAX Units Primary Inductance, LP 100kHz, 250mV 120 205 250 µH Secondary Inductance, L S 100kHz, 250mV 280 362 445 µH Leakage Inductance, LL 100kHz, 250mV 3.90 5.00 µH Interwinding Capacitance, CWW 100kHz, 250mV 1.20 3.00 pF D.C. Resistance, RDC >0.1VDC 0.90 1.50 Ω Volt-time Product, ET 5kHz, 5V 20 23 Vµs ABSOLUTE MAXIMUM RATINGS All specifications typical at TA=25°C. SELECTION GUIDE Input Output Output Isolation Turns Voltage Voltage Current Voltage Ratio Order Code (V) (V) (mA Max) (VDC) 76250EN – – – 6000 1CT:1 76253/35EN 3.3 5.0 100 6000 1: √5 76253/55EN 5.0 5.0 200 6000 1:1.33 Operating free air temperature range 76250EN 0°C to 70°C Operating free air temperature range 76253/XXEN –40°C to 85°C Storage temperature range –50°C to 125°C Lead Temperature 1.5mm from case for 10 seconds 300°C Peak current IPK 76250EN 300mA Peak current IPK 76253/XXEN 400mA Isolation voltage (flash tested for 1 second) 6000VDC 76250EN, 76253/XXEN EN Approved Converter Transformers www.dc-dc.com |
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