This Week's Focus: Analog & Power
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Maxim's Battery Monitoring IC Selected for 
New Nissan LEAF Electric Vehicle

Maxim Integrated Products has announced that its single-chip, ASIL D-rated battery monitoring IC is being integrated into the new Nissan LEAF, the next evolution of its zero-emission electric vehicle. The battery monitoring IC meets the highest safety standards, supporting ISO 26262 and ASIL D requirements (also applicable for ASIL C). Its differential universal asynchronous receiver/transmitter (UART) using capacitive isolation reduces BOM costs and failure in time (FIT) rates. The flexible UART enables robust communications in noisy environments.


Using Maxim's proprietary daisy-chain architecture and successive-approximation-register (SAR) ADC, the battery monitoring IC captures fast, accurate voltage measurements and delivers high electromagnetic capability (EMC) performance. The chip also offers a comprehensive diagnostic feature that complies with bulk current injection (BCI) requirements that are designed to promote safe and smart future vehicles.

 
 

Chassis Mount AC-DC Supplies Feature 
Low Profile Metal Case

CUI's Power Group has announced a new line of compact, chassis mount AC-DC power supplies housed in an enclosed metal case. The VGS-B series offers power ratings from 35 W to 350 W with low 30 mm profiles and compact packages as small as 99 mm x 82 mm x 30 mm (3.89" x 3.22" x 1.18"). Delivering no-load power consumption as low as 0.3 W and an operating temperature range of -20°C to +70°C, these rugged, metal enclosed power modules are well suited for reducing standby power usage and optimizing available space within commercial and industrial applications.
CUI's VGS-B power supplies carry single output voltages of 12, 24, 30 and 48 VDC, depending on the series, and an adjustable output trim. While most of the series are convection cooled, the VGS-250B and VGS-350B series both feature built-in cooling with a temperature-controlled fan. All models further feature a screw terminal interface, along with over current, over voltage and over temperature protections.

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Mentor's Jim Miller explores internal design vulnerabilities and 3rd-party attacks on IoT edge devices in this white paper that answers these questions: 
  • Should hardware designers be concerned about security for IoT edge devices?
  • Is it worth the effort and cost to ensure security at this level?
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Analog Devices has announced the Power by Linear LT8708/-1, a 98% efficient bidirectional buck-boost switching regulator controller that operates between two batteries that have the same voltage. This makes them well-suited for redundancy in self-driving cars. The LT8708/-1 operates from an input voltage that can be above, below or equal to the output voltage, making it perfect for two each 12 V, 24 V or 48 V batteries commonly found in electric and hybrid vehicles. It operates between two batteries and prevents system shutdown should one of the batteries fail. The LT8708/-1 can also be used in 48V/12V and 48V/24V dual battery systems.

 The LT8708/-1 operates with a single inductor over a 2.8 V to 80 V input voltage range and can produce an output voltage from 1.3 V to 80 V, delivering up to several kilowatts of power depending on the choice of external components and number of phases. It simplifies bidirectional power conversion in battery/capacitor backup systems that need regulation of Vout, Vin, and/or Iout, Iin, both in the forward or reverse direction. This device's six independent forms of regulation allow it to be used in numerous applications.

The LT8708-1 is used in parallel with the LT8708 to add power and phases. The LT8708-1 always operates as a slave to the master LT8708, can be clocked out-of-phase and has the capability to deliver as much power as the master. One or more slaves can be connected to a single master, proportionally increasing power and current capability of the system.