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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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L9965T Scheda tecnica(PDF) 21 Page - STMicroelectronics |
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L9965T Scheda tecnica(HTML) 21 Page - STMicroelectronics |
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21 / 62 page  5.2.3.1 Diagnostics functions Table 12. Power supply diagnostics Fault type Assertion condition IC reaction to assertion Release condition Maskable V3V3 OV V3V3 > V3V3OV_TH for t > TV3V3_OV_FIL • V3V3_INT_OV=1 in GEN_STATUS1 • The FLT pin and the SPI FAULT is asserted in NORMAL if MSK_V3V3_INT_OV=0 in GEN_CFG3 Clear on read if V3V3 < V3V3_OV_TH + V3V3_OV _HYS for t>TV3V3_OV_FIL • V3V3_INT_OV status bit non maskable • FLT pin and SPI FAULT maskable by bit MSK_V3V3_INT_OV in GEN_CFG3 5.2.3.2 Electrical parameters Table 13. Power supply electrical parameters Symbol Parameter Test condition Min Typ Max Unit V3V3OV_TH Overvoltage threshold 3.45 3.71 3.97 V V3V3OV_HYS Undervoltage hysteresis 10 60 mV T3V3_OV_FIL OV filter time Tested by SCAN 17 23 µs 5.2.4 5V LDO (V5V) This is the 5V LDO: • It is fed by VB main supply • It feeds the Isolated Vertical Interface (VIF) 5.2.4.1 Diagnostic functions The undervoltage, overvoltage (caused by external load on V5V pin) and overcurrent (short-to-GND scenario) conditions are covered by dedicated diagnostics. The V5V pin is protected by a thermal sensor and shut-down comparator. For this diagnostic, refer to Section 5.4. All V5V monitoring features are available in NORMAL and CYCLIC_WAKEUP states. Table 14. V5V LDO diagnostics Fault type Assertion condition IC reaction to assertion Release condition Maskable V5V UV VV5V < VV5V_UV_TH for t > TV5V_UV_OV_FIL • V5V_UV = 1 in GEN_STATUS1 • The FLT pin and the SPI FAULT is asserted in NORMAL if MSK_V5V_UV=0 in GEN_CFG3 Clear on read if VV5V > VV5V_UV_TH + VV5V_UV_HYS for t>TV5V_UV_OV_FIL • V5V_UV status bit non maskable • FLT pin and SPI FAULT maskable by bit MSK_V5V_UV in GEN_CFG3 V5V OV VV5V > VV5V_OV_TH for t> TV5V_UV_OV_FIL • V5V_OV = 1 in GEN_STATUS1 • The FLT pin and the SPI FAULT is asserted in NORMAL if MSK_V5V_OV=0 in GEN_CFG3 Clear on read if VV5V < VV5V_OV_TH - VV5V_OV_HYS for t>TV5V_UV_OV_FIL • V5V_OV status bit non maskable • FLT pin and SPI FAULT maskable by bit MSK_V5V_OV in GEN_CFG3 V5V OC IV5V > ITH_OC_V5V for t> tFLT_OC_V5V • V5V_OC = 1 in GEN_STATUS3 Clear on read if IV5V < VV5V_OV_TH - VV5V_OV_HYS • V5V_OC status bit non maskable L9965T/L9965TS Functional description DS14987 - Rev 1 page 21/62 |
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