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L9959 数据表(PDF) 20 Page - STMicroelectronics |
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L9959 数据表(HTML) 20 Page - STMicroelectronics |
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20 / 49 page ![]() Electrical specifications L9959 20/49 DocID027540 Rev 3 Note: If the value of the connected load is below 5 kΩ no Open Load is detected; whereas if the value of the connected load is more than 50 kΩ, Open Load is detected. If the load is in the range between (5 to 50) kΩ, the Open Load diagnosis could be not reliable. 3.6 Temperature dependent current reduction Note: see also Figure 17: Temperature dependent current reduction. 3.7 Free-wheeling diodes Table 17. Open-load detection Symbol Parameter Test condition Min. Typ. Max. Unit ROL Open-load detection threshold -5 - 50 kΩ tDIAGOL Open-load diagnosis enable delay Guaranteed through scan. 100 - 150 ms tDIAGOL1 Open-load diagnosis filter time1 2.4 - 3.6 ms tDIAGOL2 Open-load diagnosis filter time2 200 - 300 μs Vout1_OFF Out1 voltage regulator - 1.67 - 1.97 V Table 18. Retest delay Symbol Parameter Test condition Min. Typ. Max. Unit tdelay retest Retest delay for failures: SCB, SCG, SCL Guaranteed through scan. 290 350 410 μs Table 19. Temperature dependent current reduction Symbol Parameter Test condition Min. Typ. Max. Unit |IL_TSD| Current limit at TSD - 1.4 2.5 3.6 A TILR Start of temperature dependent current reduction - 150 165 - °C TSD Thermal shut-down - 175 - - °C TSD-TILR Range of temperature dependent current reduction - 202530 °C TfTSD Thermo-shut-down detection filter time Guaranteed through scan. 6 - 18 μs Table 20. Free-wheel diodes Symbol Parameter Test condition Min. Typ. Max. Unit UD Free-wheeling diode forward voltage IOUT = 3 A - - 2 V Tit(1) Free-wheeling diode reverse recovery time - - - 100 ns 1. Not subject to production test; specified by design. |
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