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UC1727 Scheda tecnica(PDF) 6 Page - Texas Instruments |
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UC1727 Scheda tecnica(HTML) 6 Page - Texas Instruments |
6 / 7 page ENABLE ENBL provides an alternate means of controlling the out- put. If ENBL is used as the primary input, B must be con- nected to VCC and A to VEE. ENBL can be driven by the output of an optoisolator from ENBL to COM as shown in Figure 7. If ENBL is not used, it should be connected to COM. Figure 7. Using ENBL as Primary Input EXTERNAL BIPOLAR SUPPLIES If it is desired to drive an emitter grounded IGBT from ex- ternal supplies, the configuration in Figure 8 should be used. COM should never be connected to ground. VCC must be ≥ 12V and VCC-VEE must be ≥ 23.5V. UNITRODE INTEGRATED CIRCUITS 7 CONTINENTAL BLVD. •• MERRIMACK, NH 03054 TEL. (603) 424-2410 •• FAX (603) 424-3460 Figure 8. Using External Supplies Figure 9. Input to Output Delay UC1727 UC2727 UC3727 Figure 6. Desaturation Response 6 |
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