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STPM098C 数据表(PDF) 65 Page - STMicroelectronics |
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STPM098C 数据表(HTML) 65 Page - STMicroelectronics |
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65 / 110 page  Figure 54. Single phase negative over-current monitor timing diagram - SLOW_RETRY = 1 t PWMn IOUTm_OC_NEG_SLOW Retry Counter IOUTm_OC_NEG_SLOW Comparator IOUTm_OC_NEG_SLOW_TH ISENn-CFILT/VREF1 0x00 0x01 HIZ 0x00 TIOUT_OC_flt 0 TIOUT_OC_flt CLEAR_FAULT ≥3Tclk ≥3Tclk Table 52. IOUT single phase overcurrent monitor electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Notes IOUT_MON_OC_th_lsb IOUT OC monitoring threshold step - 0.25 - mV Application information IOUT_MON_OC_th_range IOUT OC monitoring threshold range -255 - 255 mV Application information T_iout_oc_flt IOUT OC switch- off reaction time - - 1 μs Analog delay T_iout_fast_oc_dly1 IOUT FAST OC switch-off reaction time1 d(ISENn - VREF1/CFILT)/dt ≥ 0.5 V/μs IOUTm_oc_pos_fast_retr = 0x0 SLOW_FAST_OC_PATH = 0x2 - - 260 ns POC FAST Guaranteed by design T_iout_fast_oc_dly2 IOUT FAST OC switch-off reaction time2 d(ISENn - VREF1/CFILT)/dt ≥ 0.5 V/μs IOUTm_oc_pos_fast_retr = 0x1 SLOW_FAST_OC_PATH = 0x2 - - 245 ns POC FAST Guaranteed by design T_iout_fast_oc_dly3 IOUT FAST OC switch-off reaction time3 d(ISENn - VREF1/CFILT)/dt ≥ 0.5 V/μs IOUTm_oc_pos_fast_retr = 0x0 SLOW_FAST_OC_PATH = 0x5 - - 185 ns POC FAST Guaranteed by design T_iout_fast_oc_dly4 IOUT FAST OC switch-off reaction time4 d(ISENn - VREF1/CFILT)/dt ≥ 0.5 V/μs IOUTm_oc_pos_fast_retr = 0x1 SLOW_FAST_OC_PATH = 0x5 - - 170 ns POC FAST Guaranteed by design Single phase current overbalance A dedicated monitor compares the single active phase current with the average current of the respective loop to detect excessive unbalancing of phase current. Hysteresis on thresholds and filtering time are implemented. STPM098C Functional description DS14440 - Rev 1 page 65/110 |
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