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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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L9788 데이터시트(PDF) 92 Page - STMicroelectronics |
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L9788 데이터시트(HTML) 92 Page - STMicroelectronics |
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92 / 264 page  Low-side drivers L9788 92/264 DS12308 Rev 4 7.2.1 Enable pin INJ_ENA The Pin INJ_ENA is a digital input pin that is used as enable of Injector driver. If this pin is at low digital level the internal logic drives all injector drivers in OFF state. If this pin is at high digital, all injector drivers can be switched on by dedicated MSC bit. This pin can be used also as a SEO function for injector driver. If the application doesn't use this enable function, the INJ_ENA pin have to be pulled up externally to VDD5 by a resistor of 10 kΩ. Conditions: 5.5 V ≤ VB_IN ≤ 18 V, Tj -40 to 175 °C unless otherwise specified. 7.3 Low-side driver - O2 HEATER O2H[1:2] These 2 LowSide drivers are designed to driver O2 heater Load. They are driven by MSC command. The Output voltage is clamped to voltage limit by internal clamp circuit. O2 channel can be configured as valve driver with faster slew rate and lower over current threshold by MSC commands. Current sense generates on Curr_sense_O2H pin a reduced copy of the current flowing through O2H Power. Current sense current generator is done with a P-channel current mirror connected to VDD5_IN, for this reason voltage on Curr_sense_O2H1 and Curr_sense_O2H2 pins can never exceed VDD5_IN. Figure 35. O2 heater LowSide driver stage Table 45. INJ_ENA electrical characteristics Symbol Parameter Test condition Min Typ Max Unit Pin VIH_TX HIGH_level input voltage - 1.75 - - V INJ_ENA VIL_TX LOW_level input voltage - - - 0.75 V INJ_ENA VHYS_TX Input voltage hysteresis - 0.1 0.5 - V INJ_ENA PDOWN_TX Pull-down resistance - 50 100 200 kΩ INJ_ENA PGND OUTx O2H DRIVER O2 heater MSC Command OFF state OL & STG detection Driver ON state OC & OT protection Safety BIST control VBAT L/R GADG0112161309PS |
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