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MC33063ADR Scheda tecnica(PDF) 7 Page - Texas Instruments |
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MC33063ADR Scheda tecnica(HTML) 7 Page - Texas Instruments |
7 / 20 page 8 7 6 1 2 R* * R " 0 for constant Vin 8 7 6 1 2 VOUT RSC VIN RSC VIN VOUT a) EXTERNAL npn SWITCH b) EXTERNAL pnp SATURATED SWITCH (see Note A) MC33063A MC34063A www.ti.com SLLS636L – DECEMBER 2004 – REVISED DECEMBER 2009 A. If the output switch is driven into hard saturation (non-Darlington configuration) at low switch currents ( ≤300 mA) and high driver currents ( ≥30 mA), it may take up to 2 μs to come out of saturation. This condition will shorten the off time at frequencies ≥30 kHz and is magnified at high temperatures. This condition does not occur with a Darlington configuration because the output switch cannot saturate. If a non-Darlington configuration is used, the output drive configuration in Figure 7b is recommended. Figure 7. External Current-Boost Connections for IC Peak Greater Than 1.5 A Copyright © 2004–2009, Texas Instruments Incorporated Submit Documentation Feedback 7 Product Folder Link(s): MC33063A MC34063A |
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