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UC1845A-EP Scheda tecnica(PDF) 3 Page - Texas Instruments |
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UC1845A-EP Scheda tecnica(HTML) 3 Page - Texas Instruments |
3 / 11 page UC1842A-EP, UC1843A-EP, UC1844A-EP, UC1845A-EP CURRENT-MODE PWM CONTROLLER SGLS134B – SEPTEMBER 2002 – REVISED APRIL 2003 3 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 absolute maximum ratings over operating free-air temperature range (unless otherwise noted)†‡ VCC voltage (low impedance source) 30 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . VCC voltage (ICC mA) self limiting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output current, IO ±1 A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Output energy (capacitive load) 5 µJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Analog Inputs (pins 3, 5) –0.3 V to 6.3 V . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Error Amp Output Sink current 10 mA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Dissipation at TA < +25_C (D package) 1 W . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Package thermal impedance, θJA (see Note 1): D (8-pin) package 97 °C/W . . . . . . . . . . . . . . . . . . . . . . . . . . . . Storage temperature range, Tstg –65 _C to 150_C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lead temperature soldering 1,6 mm (1/16 inch) from case for 10 seconds 260 _C . . . . . . . . . . . . . . . . . . . . . . . † 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. ‡ Unless otherwise indicated, voltages are reference to ground and currents are positive into and negative out of the specified terminals. NOTE 1: Long term high–temperature storage and/or extended use at maximum recommended operating conditions may result in a reduction of overall device life. See http://www.ti.com/ep_quality for additional information on enhanced plastic packaging. electrical characteristics, TA = –55_C to 125_C for the UC184xAM-EP, VCC = 15 V (see Note 1), RT = 10 kΩ, CT = 3.3 nF, and TA = TJ (unless otherwise stated) PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Reference Section Output voltage TJ = 25_C, IO = 1 mA 4.95 5.0 5.05 V Line regulation voltage VIN = 12 V to 25 V 6 20 mV Load regulation voltage IO = 1 mA to 20 mA 6 25 mV Temperature stability See Notes 2 and 3 0.2 0.4 mV/ _C Total output variation voltage Line, Load, Temp. 4.9 5.1 V Output noise voltage f = 10 Hz to 10 kHz, See Note 2 TJ = 25_C 50 µV Long term stability 1000 hours, See Note 2 TA = 125_C 5 25 mV Output short-circuit current –30 –100 –180 mA Oscillator Section Initial accuracy See Note 4 TJ = 25_C 47 52 57 kHz Voltage stability VCC = 12 V to 25 V 0.2 1 % Temperature stability TA = MIN to MAX, See Note 2 5 % Amplitude peak-to-peak V pin 7, See Note 2 1.7 V Discharge current V pin 7 2 V See Note 5 TJ = 25_C 7.8 8.3 8.8 mA Discharge current V pin 7 = 2 V, See Note 5 TJ = Full range 7.5 8.8 mA |
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