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SN75374NE4 Datasheet(PDF) 8 Page - Texas Instruments |
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SN75374NE4 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 15 page SN75374 QUADRUPLE MOSFET DRIVER SLRS028A − SEPTEMBER 1988 − REVISED NOVEMBER 2004 8 POST OFFICE BOX 655303 • DALLAS, TEXAS 75265 THERMAL INFORMATION power-dissipation precautions Significant power may be dissipated in the SN75374 driver when charging and discharging high-capacitance loads over a wide voltage range at high frequencies. Figure 12 shows the power dissipated in a typical SN75374 as a function of frequency and load capacitance. Average power dissipated by this driver is derived from the equation: PT(AV) = PDC(AV) + PC(AV) + PS(AV) where PDC(AV) is the steady-state power dissipation with the output high or low, PC(AV) is the power level during charging or discharging of the load capacitance, and PS(AV) is the power dissipation during switching between the low and high levels. None of these include energy transferred to the load, and all are averaged over a full cycle. The power components per driver channel are: P DC(AV) + (P HtH ) P LtL) T P C(AV) [ CV 2f c P S(AV) + (P LHtLH ) P HLtHL) T where the times are as defined in Figure 15. t L t H T = 1/f t LH t HL Figure 13. Output-Voltage Waveform |
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