поискавой системы для электроныых деталей |
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UC2854ADW датащи(PDF) 2 Page - Texas Instruments |
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UC2854ADW датащи(HTML) 2 Page - Texas Instruments |
2 / 16 page UC1854B UC2854A, UC2854B UC3854A, UC3854B SLUS329B − JUNE 1998 − REVISED FEBRUARY 2005 2 www.ti.com DESCRIPTION (continued) The UC3854A/B products improve upon the UC3854 by offering a wide bandwidth, low offset current amplifier, a faster responding and improved accuracy enable comparator, a VREF GOOD comparator, UVLO threshold options (16 V/10 V for offline, 10.5 V/10 V for startup from an auxiliary 12 V regulator), lower startup supply current, and an enhanced multiply/divide circuit. New features like the amplifier output clamps, improved amplifier current sinking capability, and low offset VAC pin reduce the external component count while improving performance. Improved common mode input range of the multiplier output/current amplifier input allow the designer greater flexibility in choosing a method for current sensing. Unlike its predecessor, RSET controls only oscillator charging current and has no effect on clamping the maximum multiplier output current. This current is now clamped to a maximum of 2 × IAC at all times which simplifies the design process and provides foldback power limiting during brownout and extreme low line conditions. 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) UCX854A, UCX854B UNIT Supply voltage, VCC 22 V GTDRV current, IGTDRV Continuous 0.5 A GTDRV Current, IGTDRV 50% duty cycle 1.5 A Input voltage VSENSE, VRMS, ISENSE MOUT 11 V Input voltage PKLMT 5 V Input current RSET, IAC, PKLMT, ENA 10 mA Power dissipation 1 W Junction temperature, TJ −55 to 150 Storage temperature, Tstg −65 to 150 °C Lead temperature, Tsol, 1,6 mm (1/16 inch) from case for 10 seconds 300 C (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. All voltages are with respect to GND. Currents are positive into and negative out of, the specified terminal. ENA input is internally clamped to approximately 10 V. RECOMMENDED OPERATING CONDITIONS MIN MAX UNIT Supply voltage, VCC 10 20 V UC1854X −55 125 Operating junction temperature, TJ UC2854X −40 85 °C Operating junction temperature, TJ UC3854X 0 70 C |
Аналогичный номер детали - UC2854ADW |
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Аналогичное описание - UC2854ADW |
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