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TL494MJ Datasheet(PDF) 4 Page - Texas Instruments |
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TL494MJ Datasheet(HTML) 4 Page - Texas Instruments |
4 / 19 page www.ti.com s + N n+1 (xn * X)2 N * 1 Electrical Characteristics Reference Section Oscillator Section Error-Amplifier Section TL494 PULSE-WIDTH-MODULATION CONTROL CIRCUITS SLVS074E – JANUARY 1983 – REVISED FEBRUARY 2005 over recommended operating free-air temperature range, VCC = 15 V, f = 10 kHz (unless otherwise noted) TL494C, TL494I PARAMETER TEST CONDITIONS(1) UNIT MIN TYP(2) MAX Output voltage (REF) IO = 1 mA 4.75 5 5.25 V Input regulation VCC = 7 V to 40 V 2 25 mV Output regulation IO = 1 mA to 10 mA 1 15 mV Output voltage change with temperature ∆T A = MIN to MAX 2 10 mV/V Short-circuit output current(3) REF = 0 V 25 mA (1) For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. (2) All typical values, except for parameter changes with temperature, are at TA = 25°C. (3) Duration of short circuit should not exceed one second. C T = 0.01 µF, RT = 12 kΩ (see Figure 1) TL494C, TL494I PARAMETER TEST CONDITIONS(1) UNIT MIN TYP(2) MAX Frequency 10 kHz Standard deviation of frequency(3) All values of VCC, CT, RT, and TA constant 100 Hz/kHz Frequency change with voltage VCC = 7 V to 40 V, TA = 25°C 1 Hz/kHz Frequency change with temperature(4) ∆T A = MIN to MAX 10 Hz/kHz (1) For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions. (2) All typical values, except for parameter changes with temperature, are at TA = 25°C. (3) Standard deviation is a measure of the statistical distribution about the mean as derived from the formula: (4) Temperature coefficient of timing capacitor and timing resistor are not taken into account. See Figure 2 TL494C, TL494I PARAMETER TEST CONDITIONS UNIT MIN TYP(1) MAX Input offset voltage VO (FEEDBACK) = 2.5 V 2 10 mV Input offset current VO (FEEDBACK) = 2.5 V 25 250 nA Input bias current VO (FEEDBACK) = 2.5 V 0.2 1 µA –0.3 to Common-mode input voltage range VCC = 7 V to 40 V V VCC – 2 Open-loop voltage amplification ∆V O = 3 V, VO = 0.5 V to 3.5 V, RL = 2 kΩ 70 95 dB Unity-gain bandwidth VO = 0.5 V to 3.5 V, RL = 2 kΩ 800 kHz Common-mode rejection ratio ∆V O = 40 V, TA = 25°C 65 80 dB Output sink current (FEEDBACK) VID = –15 mV to –5 V, V (FEEDBACK) = 0.7 V 0.3 0.7 mA Output source current (FEEDBACK) VID = 15 mV to 5 V, V (FEEDBACK) = 3.5 V –2 mA (1) All typical values, except for parameter changes with temperature, are at TA = 25°C. 4 |
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