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L9960T 数据表(PDF) 40 Page - STMicroelectronics |
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L9960T 数据表(HTML) 40 Page - STMicroelectronics |
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40 / 95 page  Functional description L9960, L9960T 40/95 DS11115 Rev 10 Figure 18. 4 cases of high-side/low-side activation (IN1/IN2 mode) An active freewheeling is automatically set, at the end of the dead time, which means that the power transistor in parallel to the internal freewheeling diode is switched on during freewheeling phase. This should lead to a power dissipation decrease when driving inductive loads. Warning: In case of current limitation event in IN1/IN2 mode, the freewheeling is automatically set back to LS drivers. It is advised against selecting the HS recirculation in IN1/IN2 mode as L9960 is not safely protected against external failures (i.e SCG). For IN1/IN2 mode it is advised to recirculate (active freewheeling) on low-side drivers only. For PWM mode the recirculation is set by design on LS drivers only. VPS M VPS VPS T T3 Forward, T1 and T4 active IN1 = 1 , IN2 = 0 T1 M T3 T1 T4 T2 T4 T2 LS Freewheeling via T3 to T4 IN1 = 0 , IN2 = 0 T3 T1 M T2 T4 HS Freewheeling via T2 to T1 IN1 = 1 , IN2 = 1 3 T1 Reverse , T2 and T3 active IN1 = 0 , IN2 =1 VPS M T4 T2 GAPGPS02335 Note: Please refer to warning message. |
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