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TEA1039 Datasheet(PDF) 11 Page - NXP Semiconductors |
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TEA1039 Datasheet(HTML) 11 Page - NXP Semiconductors |
11 / 16 page August 1982 11 Philips Semiconductors Product specification Control circuit for switched-mode power supply TEA1039 Fig.6 Minimum output pulse repetition time Tmin (curves a) and minimum output LOW time tOLmin (curves b) in the frequency regulation mode as a function of external resistor R4 connected between RX and ground with external capacitor C5 connected between CX and ground as a parameter. Fig.7 Timing diagram for the duty factor regulation mode showing the voltage on external capacitor C5 connected between CX and ground and the output voltage as a function of time for two combinations of input signals. a: The voltages on inputs FB or LIM are below 5,9 V. The circuit is in its normal regulation range. b: The voltages on inputs FB and LIM are higher than 5,9 V. The circuit produces its minimum output LOW time, giving the maximum duty factor of the SMPS. |
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