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UC2825B Datasheet(PDF) 2 Page - Texas Instruments |
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UC2825B Datasheet(HTML) 2 Page - Texas Instruments |
2 / 9 page 2 UC1823A,B/1825A,B UC2823A,B/2825A,B UC3823A,B/3825A,B DIL-16, SOIC-16, (Top View) J or N Package; DW Package CONNECTION DIAGRAMS ELECTRICAL CHARACTERISTICS: Unless otherwise stated, these specifications apply for TA = –55°C to +125°C for the UC1823A,B and UC1825A,B; –40°C to +85°C for the UC2823A,B and UC2825A,B; 0°C to +70°C for the UC3823A,B and UC3825A,B; RT = 3.65k, CT = 1nF, VCC = 12V, TA =TJ. PARAMETER TEST CONDITIONS MIN TYP MAX UNITS Reference Section Output Voltage TJ = 25°C, Io = 1mA 5.05 5.1 5.15 V Line Regulation 12 < VCC < 20V 2 15 mV Load Regulation 1mA < IO < 10mA 5 20 mV Total Output Variation Line, Load, Temp 5.03 5.17 V Temperature Stability TMIN < TA <TMAX (Note 1) 0.2 0.4 mV/°C Output Noise Voltage 10Hz < f < 10kHz (Note 1) 50 µVRMS Long Term Stability TJ = 125°C, 1000 hours (Note 1) 5 25 mV Short Circuit Current VREF = 0V 30 60 90 mA The UC3825A,B has dual alternating outputs and the same pin configuration of the UC3825. The UC3823A,B outputs operate in phase with duty cycles from zero to less than 100%. The pin configuration of the UC3823A,B is the same as the UC3823 except pin 11 is now an out- put pin instead of the reference pin to the current limit comparator. “A” version parts have UVLO thresholds identical to the original UC3823/25. The “B” versions have UVLO thresholds of 16 and 10V, intended for ease of use in off-line applications. Consult Application Note U-128 for detailed technical and applications information. Contact the factory for fur- ther packaging and availability information. DESCRIPTION (cont.) ABSOLUTE MAXIMUM RATINGS Supply Voltage (VC, VCC) . . . . . . . . . . . . . . . . . . . . . . . . . 22V Output Current, Source or Sink (Pins OUTA, OUTB) DC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5A Pulse (0.5 µs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.2A Power Ground (PGND). . . . . . . . . . . . . . . . . . . . . . . . . . . ±0.2V Analog Inputs (INV, NI, RAMP) . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 7V (ILIM, SS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V to 6V Clock Output Current (CLK/LEB) . . . . . . . . . . . . . . . . . . . –5mA Error Amplifier Output Current (EAOUT) . . . . . . . . . . . . . . 5mA Soft Start Sink Current (SS) . . . . . . . . . . . . . . . . . . . . . . . 20mA Oscillator Charging Current (RT) . . . . . . . . . . . . . . . . . . . –5mA Power Dissipation at TA = 60°C . . . . . . . . . . . . . . . . . . . . . . 1W Storage Temperature Range . . . . . . . . . . . . . –65°C to +150°C Junction Temperature . . . . . . . . . . . . . . . . . . . –55°C to +150°C Lead Temperature (Soldering, 10 sec.) . . . . . . . . . . . . . . 300°C All currents are positive into, negative out of the specified ter- minal. Consult Packaging Section of Databook for thermal limi- tations and considerations of packages. PLCC-20, LCC-20, (Top View) Q, L Packages Device UVLO Dmax UC3823A 9.2V/8.4V < 100% UC3823B 16V/10V < 100% UC3825A 9.2V/8.4V < 50% UC3825B 16V/10V < 50% |
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