L6598 datasheet(8/16 Pages) STMICROELECTRONICS

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L6598 Arkusz danych(PDF) 8 Page - STMicroelectronics

Numer części	L6598

Szczegółowy opis	HIGH VOLTAGE RESONANT CONTROLLER

PDF	16 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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8 / 16 page

L6598

8/16

Start Timing Constant) is 0.15 s/

µF.

The current Iosc is fed to the oscillator as shown in fig. 5. It is twice mirrored (x4 and x8) generating the triangular

wave on the oscillator capacitor Cf. Referring to the internal structure of the oscillator (fig.5), a good relationship

to compute an approximate value of the oscillator frequency in normal operation is:

[7]

The degree of approximation depends on the frequency value, but it remains very good in the range from 30kHz

to 100kHz (figg.6-10)

Figure 5. Oscillator Block

fmin

1.41

fminCf

--------------------

Iosc

Vth+

Vth-

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