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UC2856QDWR Fiches technique(PDF) 3 Page - Texas Instruments |
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UC2856QDWR Fiches technique(HTML) 3 Page - Texas Instruments |
3 / 12 page www.ti.com ABSOLUTE MAXIMUM RATINGS ELECTRICAL CHARACTERISTICS UC2856Q SGLS265 – NOVEMBER 2004 over operating free-air temperature range (unless otherwise noted)(1)(2) UNIT Supply voltage 40 V Collector supply voltage 40 V DC 0.5 A IO Output current (sink or source) Pulse (0.5 ms) 2 A Error amplifier input voltage –0.3 V to VIN Shutdown input voltage –0.3 V to 10 V Current sense input voltage –0.3 V to 3 V SYNC output current ±10 mA Error amplifier output current -5 mA Soft start sink current 50 mA Oscillator charging current 5 mA TA = 25°C 1 W Power dissipation TC = 25°C 2 W TJ Operating junction temperature range –55 °C to 150°C Tstg Storage temperature range –65 °C to 150°C Lead temperature soldering 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. (2) Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals. T A = –40°C to 125°C, VIN = 15 V, RT = 10 kΩ, CT = 1 nF, and TA = TJ (unless otherwise stated) (1) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT REFERENCE SECTION Output voltage IO = 1 mA, TJ = 25°C 5.05 5.1 5.15 V Line regulation voltage VIN = 8 V to 40 V 20 mV Load regulation voltage IO = –1 mA to –10 mA 15 mV Total output variation Line, Load, and Temperature 5 5.2 V Output noise voltage f = 10 Hz to 10 kHz, TJ = 25°C 50 µV Long term stability 1000 hours, (2) TJ = 25°C 5 25 mV Short circuit current VREF = 0 V –25 –45 –65 mA OSCILLATOR SECTION TJ = 25°C 180 200 220 Initial accuracy kHz TJ = Full range 170 230 Voltage stability VIN = 8 V to 40 V 2% VCT = 2 V, TJ = 25°C 7.5 8 8.8 Discharge current mA VCT = 2 V 6.7 8 8.8 Sync output high level voltage IO = –1 mA 2.4 3.6 V Sync output low level voltage IO = 1 mA 0.2 0.4 V Sync input high level voltage CT = 0 V, RT = VREF 2 1.5 V Sync input low level voltage CT = 0 V, RT = VREF 1.5 0.8 V Sync input current CT = 0 V, RT = VREF,VSYNC = 5 V 1 10 µA Sync delay to outputs CT = 0 V RT = VREF, VSYNC = 0.8 V to 2 V 50 100 ns (1) All voltages are with respect to GND. Currents are positive into, negative out of the specified terminal. (2) This parameter, although specified over the recommended operating conditions, is not 100% tested in production. 3 |
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