TEA1039 データシートの表示（PDF） - Philips Electronics

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TEA1039

Control circuit for switched-mode power supply

Philips Electronics 

Philips Semiconductors

Control circuit for switched-mode power supply

Product specification

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.

August 1982

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