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L9779WD-TR Datasheet(PDF) 9 Page - STMicroelectronics |
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L9779WD-TR Datasheet(HTML) 9 Page - STMicroelectronics |
9 / 170 page DocID027452 Rev 5 9/170 L9779WD Detailed features description 169 1 Detailed features description Package – HiQUAD-64 5 V logic regulator – 5 V precision voltage regulator (± 2%) with external NMOS – Max current regulated: 400 mA – Charge pump capacitor at pin CP is used to drive the gate of the external NMOS transistor 3.3 V logic regulator – 3.3 V precision voltage regulator (± 2%) with over-current protection – Max current regulated: 100 mA 5 V tracking sensor supply – 2 x 5 V tracking sensor supply with protection and diagnosis on MSC – Short-circuit to Vbat/GND fully protected – Max current regulated: 2 x 100 mA VDD_IO supply – All the digital output is supplied by external VDD_IO through VDD_IO pin Smart reset – Main Reset monitoring VB_UV Logic voltage management and safety control Watch dog – Main reset management 5 V voltage monitoring safety output disable – MicroSecond Channel activity watch dog – MSC controllable query and answer watch dog compliant with VDA2.0 level 3 (enabled by default) Power latch – L9779WD is switched on by KEY_ON signal and switched off by logic OR of KEY_ON signal and MicroSecond Channel bit Secure engine off mode (default) switches off the drivers in the following order: – OUT1 through to OUT4 in 225 ms (typical) – OUT13 and OUT14 in 600 ms (typical) Flying wheel interface function (VRS) – The VRS is the interface between the microprocessor and the magnetic pick-up or variable reluctance sensor that collects the information coming from the flying wheel – Adaptive filtering on amplitude and timing adapts better the device response to VRS input switching Protected low-side driver – LSa (OUT1 to 5) 4 Ch. serial IN via MicroSecond Channel, Rdson = 0.72 Ohm @150 °C, Vcl = 58 V ±5, Imax = 2.2 A; 1 Ch. serial IN via MicroSecond Channel, Rdson = 0.72 Ohm @150 °C, Vcl = 58 V ±5, Imax = 3 A; |
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