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TMP821 датащи(PDF) 7 Page - Texas Instruments

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номер детали TMP821
подробное описание детали  TWO-PHASE HALF-WAVE MOTOR PREDRIVER
PDF  13 Pages
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TMP821 датащи(HTML) 7 Page - Texas Instruments

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Power Dissipation
T – Temperature – °C
A
0
25
50
75
100
0
0.2
0.4
0.6
0.8
1
TMP821
SLDS152 – JANUARY 2008
Figure 4 shows allowable power dissipation versus ambient temperature.
Figure 4. Power Dissipation
Total power consumption can be calculated as shown in Equation 1.
Ptotal = PC1 + PC2 + PC3
(1)
Where:
PC1 = circuit power dissipation
PC1 = VCC × ICC
PC2 = output power dissipation
PC2 = (VCC – VOH) × IO
VOH = A1 and A2 high-level voltage
PC2 can be reduced by increasing the external output transistor's hFE rank to reduce the IO consumption.
PC3 = AL power dissipation
PC3 = VAL_LOW × IAL
Copyright © 2008, Texas Instruments Incorporated
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