L6388 STMICROELECTRONICS | Alldatasheet

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Technical content

1 FEATURES

2 DESCRIPTION

tured with the BCD"OFF-LINE" technology. work with voltage Rail up to 600V. ease of interfacing with controlling devices. Figure 2. Block Diagram Figure 1. Package Table 1. Order Codes

Table 2. Absolute Maximum Rating Figure 3. Pin Connection (Top view) Table 3. Pin Description and the source of the external MOSFET normally used to hold the pin low. Table 4. Thermal Data

1 LIN I Low Side Driver Logic Input

2 HIN I High Side Driver Logic Input

3 Vcc I Low Voltage Power Supply

4 GND Ground

5 LVG (*) O Low Side Driver Output

6 OUT O High Side Driver Floating Reference

7 HVG (*) O High Side Driver Output

8 Vboot Bootstrap Supply Voltage

4 LVG

Table 5. Recommended Operating Conditions Table 6. Electrical Characteristics

3 INPUT LOGIC

certain amount of time (DT) (see Figure 4). Figure 6. Typical Rise and Fall Times vs. Load Figure 7. Quiescent Current vs. Supply

3.1 BOOTSTRAP DRIVER

An internal charge pump (fig. 8b) provides the DMOS driving voltage . The diode connected in series to the DMOS has been added to avoid undesirable turn on of it.

3.2 CBOOT selection and charging

The ratio between the capacitors CEXT and CBOOT is proportional to the cyclical voltage loss . e.g.: if Qgate is 30nC and Vgate is 10V, CEXT is 3nF. With CBOOT = 100nF the drop would be 300mV. If HVG has to be supplied for a long time, the CBOOT selection has to take into account also the leakage losses. CEXT. This charge on a 1µF capacitor means a voltage drop of 1V.

has to be long enough to charge the capacitor. quency this drop can be neglected. Anyway increasing the frequency it must be taken in to account. and Tcharge is the charging time of the bootstrap capacitor. circuit topology doesn't allow a sufficient charging time, an external diode can be used. Figure 8. Bootstrap Driver.

Figure 15. DIP8 Mechanical Data & Package Dimensions

Figure 16. SO8 Mechanical Data & Package Dimensions 0.15mm (.006inch) in total (both side).

Table 7. Revision History

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publicati on are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America L6388