SG1540 Ver la hoja de datos (PDF) - Microsemi Corporation

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SG1540

OFF-LINE START-UP CONTROLLER

Microsemi Corporation 

SG1540/SG2540/SG3540

APPLICATIONS INFORMATION (continued)

The voltage waveform at +VIN is shown in Figure 4 with these resistor values and with CSTART = 3µF. Notice that two tries are required

before the +15 volt bootstrap winding becomes active.

FIGURE 4 - STARTUP VOLTAGE WAVEFORM

FIGURE 5 - SECONDARY-SIDE START-UP WITHOUT A LINE TRANSFORMER

4/90 Rev 1.1 2/94

Copyright © 1994

LINFINITY Microelectronics Inc.

5

11861 Western Avenue ∞ Garden Grove, CA 92841

(714) 898-8121 ∞ FAX: (714) 893-2570

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