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MC3405P Datasheet(PDF) 6 Page - ON Semiconductor |
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MC3405P Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 12 page MC3405 6 MOTOROLA ANALOG IC DEVICE DATA Slope Can Be Either Polarity. VCC = +15 V VEE = Gnd COMPARATOR SECTION Figure 7. Normalized Input Offset Voltage Figure 8. Input Bias Current Figure 9. Normalized Input Offset Current Figure 10. Output Sink Current versus Output Voltage Figure 11. Pulse Width Modulator Schematic and Waveforms TA, AMBIENT TEMPERATURE (°C) 1.40 1.20 1.00 0.80 0.60 0.40 –60 –40 –20 0 20 40 60 80 100 120 140 Slope Can Be Either Polarity. VCC = +15 V VEE = Gnd VCC, POSITIVE SUPPLY VOLTAGE (V) 200 160 120 80 40 2.0 6.0 10 14 18 22 26 30 VEE = Gnd TA = +125°C TA = –55°C TA = +25°C TA, AMBIENT TEMPERATURE (°C) 2.20 1.80 1.40 1.00 0.60 0.20 –60 –40 –20 0 20 40 60 80 100 120 140 VOL, OUTPUT VOLTAGE (mV) 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 0 200 400 600 800 1000 TA = +125°C TA = +25°C TA = –55°C VCC = +15 V VEE = Gnd (a) Oscillator Square Wave Output VSW VCC VEE Time (b) Triangle Wave and Control Voltage (c) Output Pulses vt VTH VTL Vout VCC VEE Time Time Pulse Width = when: VTL < VC < VTH Duty Cycle in % = (100) Vc – VTL Vc – VTL 1 f – Rf 1 5.0 k 6 5 11 Comp 2 VEE VCC 4 7 Vout 10 9 C 8 vt 300 k 150 k R2 R1 12 13 14 VCC 10 k 1.0 M 2 3 VC + + + + – – – 5.0 k 5.0 k VEE R1 4RfCR2 VTH = VS(1 + R2/R1) + VEE Oscillator Frequency f = VS = VCC – VEE 1 2 VTL = VS(1 – R2/R1) + VEE 1 2 5.0 k VSW VC Comp 1 Amp 2 Amp 1 VTH –VTL VTH –VTL |
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