亚博棋牌游戏Allegro MicroSystems Introduces New Multi - Output Automotive Power Management IC with Buck - Boost Pre - Regulator
April 11, 2017
亚博棋牌游戏Allegro MicroSystems Introduces New Multi - Output Automotive Power Management IC with Buck - Boost Pre - Regulator
April 11, 2017
Designed with a synchronous buck, three internal LDOs, watchdog timer, NPOR, and fault flags
亚博棋牌游戏Allegro MicroSystems, LLC, introduces a new power management IC that USES a buck or buck - boost pre - regulator to efficiently convert automotive 'voltages into a tightly regulated intermediate voltage, complete with control, diagnostics, and protections. The output of Allegro' sA4408Supplies a 5 V / 115 mA tracking/protected ", a 3.3 V / 165 mA ", a 5 V / 325 mA ", and an adjustable output synchronous buck regulator (1.25 V / 700 mA). The A4408 is ideal for under - hood appl亚博尊贵会员ications, with The key automotive applications o: Electronic Power Steering (EPS), Transmission Control Units (TCU), The Advanced style Systems (ABS), The Advanced Driver Assistance Systems (ADAS), Emissions Control Modules, and other automotive applications.
The A4408 contains a watchdog timer that can be programmed to accept a wide range of clock frequencies (WDADJ). The watchdog timer has a fixed activation delay to accommodate processor startup. The watchdog timer as an enable/disable The pin (active low, WDENn) to facilitate initial factory programming or field reflash programming.
The Diagnostic outputs from the A4408 include a power - on - reset the output (NPOR). POK5V are the status of the 5 V and 5 V protected LDOs. Fault Flag 0 (FF0) and Fault Flag 1 (FF1) retain the last Fault to reset the microcontroller. The Dual bandgaps, one for regulation and one for Fault checking and improve the long - term reliability of the A4408.
The Enable inputs to the A4408 include a logic - level (ENB) and two high - voltage (ENBAT1 and ENBAT2) inputs. The A4408 provides flexibility by o a TRACK pin to set the reference of the tracking regulator to either the 5 V or the 3.3 V output, so the A4408 can be adapted across indicates multiple platforms with company's sensor types. The MODE pin, selects the NPOR undervoltage threshold for V5 and V5P outputs.
Protection, the features include under - and overvoltage lockout on all four CPU supply rails. In case of a shorted output, all linear regulators feature foldback overcurrent Protection. In addition, the V5P output is protected from a short - to - 'event. Both switching regulators include pulse - by - pulse current limit, hiccup mode short - circuit Protection, LX short - circuit Protection, missing asynchronous diode Protection (VREG), and thermal shutdown.