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AP3845CMTR Datasheet(PDF) 8 Page - BCD Semiconductor Manufacturing Limited |
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AP3845CMTR Datasheet(HTML) 8 Page - BCD Semiconductor Manufacturing Limited |
8 / 13 page CURRENT MODE PWM CONTROLLER AP384XC Data Sheet 8 Sep. 2006 Rev. 1. 1 BCD Semiconductor Manufacturing Limited Figure 4 is the basic test circuit for AP384XC. In testing, the high peak currents associated with capacitive loads necessitate careful grounding techniques. Timing and bypass capacitors should be connected close to pin 5 in a single point ground. The transistor and 5k potentiometer are used to sample the oscillator waveform and apply an adjustable ramp to pin 3. Figure 7. Reference Voltage vs. Ambient Temperature Typical Performance Characteristics Figure 5. Oscillator Dead Time vs. Timing Capacitor Figure 6. Timing Resistor vs. Frequency ELectrical Characteristics (Continued) Figure 8. Output Saturation Characteristics -40 -20 0 20 40 60 80 100 120 4.980 4.985 4.990 4.995 5.000 5.005 5.010 5.015 V CC =15V, I O =1mA Ambient Temperature ( oC) 0 50 100 150 200 250 300 350 400 450 500 550 600 -0.5 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 V CC =15V, T A =25 oC Output Sink Current (mA) |
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