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BTN8962 データシート(PDF) 81 Page - Infineon Technologies AG |
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BTN8962 データシート(HTML) 81 Page - Infineon Technologies AG |
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81 / 94 page  ESL = ∫t SL1 tSL2V S ⋅ IOUT dt = VS ⋅ IOUT 2 ⋅ tHS − off Equation 47 From the switching energy ESL the average power loss PSL can be determined with two switching times per PWM period. This is shown in Equation 48: PSL = VS ⋅ IOUT 2 ⋅ 2 ⋅ tHS − off ⋅ fPWM = VS ⋅ IOUT ⋅ tHS − off ⋅ fPWM Equation 48 6.4 Entire power dissipation of the MOSFETs The average power dissipation in PWM-mode consists of the switching losses plus the conducted losses, as shown in Figure 86. We must take into account that the losses occur in the high-side (HS) and low-side (LS) MOSFET. In the example of Figure 85, where the motor is connected to GND, the switching losses occur in the high-side (HS) MOSFET. The conducted losses occur in the high-side (HS) MOSFET during the ON-phase and in the low-side (LS) MOSFET in the free wheeling phase, as shown in Figure 86. In PWM-mode, the PWM-period-time is: TPWM = 1 fPWM Equation 49 The duty cycle (DC) of the PWM-mode is the relation between the ON-time and the PWM-period-time in percent. DC = TON TPWM Equation 50 t t VOUT VIN TON = TPWM · DC actuator losses conducted losses (free wheeling ) conducted losses (ON-phase ) TPWM Figure 86 Entire power dissipation of BTN89xy with the motor connected to GND In Chapter 6.4.2 and Chapter 6.4.3 the power dissipation is estimated separately for the high-side (HS) and low- side (LS) MOSFET. BTN8960 /62 /80 /82 High Current PN Half Bridge Power Dissipation Application Note 81 Rev. 0.6 2017-02-21 |
同様の部品番号 - BTN8962 |
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同様の説明 - BTN8962 |
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