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UC3902NG4 Datasheet(PDF) 2 Page - Texas Instruments |
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UC3902NG4 Datasheet(HTML) 2 Page - Texas Instruments |
2 / 10 page UC2902 UC3902 SLUS232E − DECEMBER 19, 2002 − REVISED JULY 2011 2 www.ti.com DESCRIPTION (continued) A differential line is used for the share bus to maximize noise immunity and accommodate different voltage drops in each power converter’s ground return line. Trimming of each converter’s output voltage is accomplished by injecting a small current into the output voltage sense line, which requires a small resistance (typically 20 Ω to 100 Ω) to be inserted. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. ABSOLUTE MAXIMUM RATINGS over operating free-air temperature range unless otherwise noted(1) UC2902 UC3902 UNIT VCC, ADJ −0.3 to 20 Input voltage range V SENSE −5 to 5 V Input voltage range, VI ADJR, COMP −0.3 to 4 V SHARE−, SHARE+ −0.3 to 10 Output current I SHARE+ −100 mA to 10 mA mA Output current, IO ADJ −1 mA to 30 mA mA Operating free-air temperature range, TA −40 to 100 Junction temperature range, TJ −55 to 105 °C Storage temperature, Tstg −65 to 150 °C Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds 300 (1) Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. Voltages are with respect to GND. Currents are positive into, and negative out of the specified terminal. |
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