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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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L9300 датащи(PDF) 22 Page - STMicroelectronics |
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L9300 датащи(HTML) 22 Page - STMicroelectronics |
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22 / 178 page  VDD2 output is short to battery protected to avoid reverse current into VDD2_SUP pin: in case the protection is triggered a diagnostic bit is set in the dedicated SPI register. An out of regulation comparator is implemented: this comparator senses when the internal current limitation circuitry is activated to regulate properly the output voltage due to either a low drop condition or an overcurrent condition. Once out of regulation condition is detected a flag is set in SPI registers and latched until read. The diagnostic is not masked during power-up phase. VDD2 has a thermal protection with thermal sensors shared with TRKn regulators. In case the temperature shutdown threshold is reached, and the regulator detects an out of regulation fault, it will be turned off and its dedicated diagnostic bit will be set. Once the sensed temperature is decreased below the shutdown threshold plus a thermal hysteresis, the regulator is automatically turned on with soft start function. T_SD_TRK is the bit that latches the thermal shutdown and it is cleared on SPI read. A dedicated disable SPI bit VDD2_DIS (default condition = 0) is present and it can be used to switch off the VDD2 regulator and avoid thermal on/off oscillations in case the short on output pin cannot be removed. Figure 11. VDD2 linear or tracking regulator VDD2 Tracking X X Control loop (linear or tracking) X Driver VDD2_SUP Tracking VDD2 VDD2_SEL VDD2 VDD2_SUP GADG1007170948PS 8.2.2 VDD2 electrical characteristics 5.5 V ≤ VBATP ≤ 19 V; 5.5 V ≤ VDD2_SUP ≤ 19 V; -40 °C ≤ Tj ≤ 175 °C unless otherwise noticed. All voltages refer to GND pin. If VDD2_SUP < 6 V the regulator may enter in Rds ON mode where tracking error and line/load regulation accuracy depend on regulator dropout. Table 8. VDD2 electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Pin IVDD2 Output load current Application note 10 200 mA VDD2 CVDD2 Output capacitor Application note Component & temperature drift included -25% 2.2 +25% µF VDD2 CVDD2 ESR Output capacitor maximum ESR Application note f ≤ 150 kHz 0.01 1 Ω VDD2 CVDD2 EXT External sensor capacitor Application note 150 µF VDD2 VDD2_SUP_ Ileak_dis VDD2_SUP leakage current VDD2_SUP = 13 V, WAKE = 0 V -1 1 µA VDD2_SUP L9300 Power supply DS12258 - Rev 5 page 22/178 |
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