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L9788 bảng dữ liệu(PDF) 78 Page - STMicroelectronics |
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L9788 bảng dữ liệu(HTML) 78 Page - STMicroelectronics |
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78 / 264 page  Multi-voltage regulator supplies L9788 78/264 DS12308 Rev 4 6.7 VB_IN and VB_IN_SW SUPPLY VB_IN pin is the power supply pin for internal circuit. During cranking phase even the VB_IN is = 3.1 V the chip can keep the status, the internal POR is not triggered and also the internal supply under voltage is not triggered (internal 3V3 regulator undervoltage), the PHOLD timer value is also kept. Table 37. VB_IN electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Pin IVB_IN VB_IN current in functional mode -- - 60 mA VB_IN IVB_IN_STBY VB_IN current in OFF state. - - - 10 µA VB_IN IVB_IN_SW VB_IN_SW current in functional mode VB_IN=VB_IN_S W=13.5V, Vpre load = 500mA 200 - 350 mA VB_IN_SW VOFF_VB_IN Min VB_IN voltage to keep the MRD, start relay status -- - 3.1 V VB_IN VUV_VB_IN_L VB_IN undervoltage hysteresis threshold low - 4.7 4.8 4.9 V VB_IN VUV_VB_H VB_IN undervoltage hysteresis threshold high - 4.8 4.9 5.05 V VB_IN VUV_VB_IN_HYST -- - 0.1 - V VB_IN VOV_VB_IN_L VB_IN over voltage threshold low -28 - - V VB_IN VOV_VB_IN_H VB_IN over voltage threshold high -- - 32 V VB_IN VOV_VB_IN_HYST -- - 2 - V VB_IN tVBOV1 Filter time1 for VB_IN overvoltage(1) Tested by scan 70 85 100 µs VB_IN tVBOV2 Filter time2 for VB_IN overvoltage(1) Tested by scan 11 15 19 ms VB_IN tVBUV1 Filter time 1 for VB_IN undervoltage VUV_VB_IN_L(1) Tested by scan 5 - 15 µs VB_IN tVBUV2 Filter time 2 for VB_IN undervoltage VUV_VB_IN_H(1) Tested by scan 5 - 15 µs VB_IN VUV_VB_CP_ON VB_IN threshold for main logic reset Charge Pump ON 2.4 2.7 3 V VB_IN VUV_VB_CP_OFF VB_IN threshold for main logic reset Charge Pump OFF 3.9 4.4 4.8 V VB_IN 1. Fault detection during power up sequence is masked until RSTN release to avoid false triggering at ramp-up phase. |
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