New compact low-power consumption device supports redundant power supply rails from Toshiba

Toshiba Electronics Europe has introduced the TPD7110F, an ideal diode controller that enables safe power control and flexible design in automotive systems. Target applications include battery management systems (BMS), head-up displays (HUD), and body control modules (BCM)

The TPD7110F features reverse-polarity protection to prevent damage caused by battery connection errors. Additionally, automotive safety designs require redundant configurations, increasing the significance of ideal diode controllers. 

The TPD7110F operates by combining a built-in charge pump circuit with an internal capacitor and an external N-channel MOSFET to create a low-loss ideal diode configuration. This design enables space savings by adopting Toshiba’s PS-8 package, which measures 2.9mm by 2.8mm. Also, the inclusion of the internal capacitor eliminates the need for external components, allowing for high-density mounting in space-limited PCB designs.

TPD7110F includes a reverse-current-blocking function that detects changes in the drain-source voltage (VDS) across the connected MOSFET, preventing current from flowing from the load back to the battery. Together, these features allow designers to construct redundant power systems by using multiple units of this product.

Additionally, pairing the device with back-to-back MOSFETs enables an electronically controlled On/Off load switch. The reverse current blocking function can be disabled in systems requiring reverse current flow to allow energy to be stored back into the battery.

The controller’s low-current design achieves a typical operating current of 100 µA and a standby current of 2 µA, which contribute to the overall system power budget.