L6598 datasheet(6/17 Pages) STMICROELECTRONICS

Numer części	L6598

Szczegółowy opis	HIGH VOLTAGE RESONANT CONTROLLER

PDF	17 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

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L6598

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Figure 6. Oscillator/Output Timing Diagram

BLOCK’S DIAGRAM DESCRIPTION

3.1 High/Low Side driving section

An High and Low Side driving Section provide the proper driving to the external Power MOS or IGBT. An high

sink/source driving current (450/250 mA typ) ensure fast switching times also when size4 Power MOS are used.

The internal logic ensures a minimum dead time to avoid cross-conduction of the power devices.

3.2 Timing and Oscillator Section

The device is provided of a soft start function. It consists in a period of time, TSS, in which the switching frequen-

cy shifts from fstart to fmin. This feature is explained in the following description (ref. fig.7 and fig.8).

Figure 7. Soft Start and frequency shifting block

LVG

HVG

C f

D98IN897

Css

Ifmin

Ifstart

Iss

OSC

Iosc

L6598 Arkusz danych(PDF) 6 Page - STMicroelectronics