TL494M PULSE-WIDTH-MODULATION CONTROL CIRCUIT

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TL494MPULSE-WIDTH-MODULATION CONTROL CIRCUITSGLS041A – D3883, SEPTEMBER 1991 – REVISED MAY 1993functional block diagramRTCTDEAD-TIMECTRL65≈ 0.1 V4OscillatorDead-Time-ControlComparator1DOUTPUT CTRL(see Function Table)13C1Q189C1E1IN +IN –12Error Amplifier+1–PWMComparatorPulse-SteeringFlip-FlopQ21110C2E2IN +IN –1615Error Amplifier+2–ReferenceRegulator1214VCCREFFEEDBACK30.7 mA7GNDPin numbers shown are for J package.2POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
TL494MPULSE-WIDTH-MODULATION CONTROL CIRCUITSGLS041A – D3883, SEPTEMBER 1991 – REVISED MAY 1993absolute maximum ratings over operating free-air temperature range (unless otherwise noted)NOTES:Supply voltage, V CC (see Note 1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 VAmplifier input voltage, V I . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V CC + 0.3 VCollector output voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 VCollector output current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250 mAContinuous total dissipation (see Note 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1375 mWOperating free-air temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55°C to 125°CStorage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to 150°CCase temperature for 60 seconds: FK package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260°CLead temperature 1,6 mm (1/16 inch) from case for 60 seconds: J package . . . . . . . . . . . . . . . . . . . . . 300°C1. All voltage values, except differential voltages, are with respect to the network GND.2. For operation above 25°C free-air temperature, derate linearly to 275 mW at the rate of 11 mW/°C.recommended operating conditionsMIN MAX UNITSupply voltage, VCC 7 40 VAmplifier input voltage, VI –0.3 VCC –2 VCollector output voltage, VO 40 VCollector output current (each transistor) 200 mACurrent into FEEDBACK 0.3 mATiming capacitor, CT 0.47 10000 nFTiming resistor, RT 1.8 500 kΩOscillator frequency, fosc 1 300 kHzOperating free-air temperature, TA –55 125 °CPOST OFFICE BOX 655303 • DALLAS, TEXAS 75265 3
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TL494M PULSE-WIDTH-MODULATION CONTROL CIRCUIT

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