Toshiba targets general-purpose power ICs for automotive use
Multiple output voltages are supported by the range of general-purpose system power ICs, released by Toshiba Electronics Europe. The ICs support functional safety according to ISO26262 for safety-critical automotive applications including electric power steering and braking systems where ASIL-D is required.
There are four devices in the series, with various output voltages generated by a buck converter. There is the 1.1V TB9045FNG-110, the 1.2V TB9045FNG-120, the 1.25V TB9045FNG-125 and 1.5V TB9045FNG-150. The four output voltages from each device can be used to power the core of a microcontroller as well as being used for sensors and other interfaces.
A buck-boost converter generates 6V from the automotive battery and is capable of operating with input voltages as low as 2.7V to ensure constant voltage, even during cranking operations when the battery voltage drops significantly. The ICs are suited to input voltages as high as 18V and can operate over the temperature range -40 to +125ºC. All are housed in a tiny HTSSOP48-P-300-0.50 package which measures 6.1 x 12.5 x 1.0mm for the space-constrained and densely packed automotive applications.
The TB9045FNG series includes a range of fault detection features, including over- voltage for the DC/DC converter and under-voltage lockout (UVLO) for the battery power supply as well as thermal shutdown and a circuit to monitor the oscillator frequency. A watchdog timer detects errors on the external microcontroller as well as the ability to detect latent faults that would indicate a potential failure. Reporting of any issues can be configured via the serial peripheral interface (SPI) using a dedicated register for use in variety of systems.
Toshiba provides a full suite of documentation including a functional safety FMEDA to assist with safety design and analysis of systems.
Toshiba Electronics Europe is the European electronic components business of Toshiba Electronic Devices and Storage Corporation. TEE offers European consumers and businesses a variety of hard disk drive (HDD) products and semiconductors for automotive, industrial, IoT, motion control, telecomms, networking, consumer and white goods applications. The company’s portfolio encompasses integrated wireless ICs, power semiconductors, microcontrollers, optical semiconductors, ASSPs and discrete devices ranging from diodes to logic ICs.
