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UC2844A 数据表(PDF) 9 Page - Texas Instruments |
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UC2844A 数据表(HTML) 9 Page - Texas Instruments |
9 / 19 page UC2842AQ, UC2843AQ, UC2844AQ, UC2845AQ CURRENT-MODE PWM CONTROLLER SGLS164 – APRIL 2003 9 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 APPLICATION INFORMATION 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. Open-Loop Laboratory Text Fixture A fraction of the oscillator ramp can be resistively summed with the current sense signal to provide slope compensation for converters requiring duty cycles over 50%. Note that capacitor, C, forms a filter with R2 to suppress the leading edge switch spikes. Figure 8. Slope Complression |
类似零件编号 - UC2844A |
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类似说明 - UC2844A |
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