L6598D datasheet(8/16 Pages) STMICROELECTRONICS

Moteur de recherche de fiches techniques de composants électroniques

L6598D Fiches technique(PDF) 8 Page - STMicroelectronics

No de pièce	L6598D

Description	HIGH VOLTAGE RESONANT CONTROLLER

PDF	16 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	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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