With highly accurate current sensing capabilities and ON resistances ranging from 9 m? to 180 m?, ROHM has developed six new high-side Smart Switches (Intelligent Power Devices, or IPDs) in the BV1HBxxxEFJ series (BV1HB008EFJ-C, BV1HB012EFJ-C, BV1HB020EFJ-C, BV1HB040EFJ-C, BV1HB090EFJ-C, BV1HB180EFJ-C).
They are useful for protecting loads and subsystems from irregularities such as overcurrent, overvoltage, and overtemperature, ensuring reliable operation and shielding sensitive components in automotive lighting, body control such as, door locks and power windows.
Safety and reliability are further improved by extensive diagnostic features, such as open load and reverse battery detection.
The New High-Side Smart Switches Feature:
- Exceptional high-capacitance load driving capability, maximizing performance at the critical interface between Zonal Controllers and output loads (including various ECUs).
- Leveraging proprietary cutting-edge process technology makes it possible to achieve both low ON resistance and high inductive energy clamp – two characteristics typically involve a trade-off.
- The result is a well-balanced integration of three key performance metrics: drive capability, ON resistance, and energy tolerance.
- This enhances system design safety, efficiency, and reliability.
- The devices also incorporate a best-in-class* high-precision current sensing function (±5%) that provides effective protection for harnesses connected to output loads.
- At the same time, the compact, high heat dissipation HTSOP-J8 package ensures excellent design versatility.
The Move Towards Zonal Controllers Architecture
With the development of electric vehicles (EVs) and autonomous driving, vehicle electronic control systems are become more complex. The move towards Zonal Controllers architecture, which controls vehicle operations in specific zones, is a result of this progress, which has increased the significance of electronic protection from the perspective of functional safety.
Because of this, smart switches are being used more and more frequently for electronic load protection and control.
Zonal controllers must each manage a large number of loads, but conventional smart switches often lack the drive capability required for high-capacitance loads.
ROHM’s new smart switches address this challenge, delivering key performance attributes such as low ON resistance and high inductive energy clamp while significantly improving capacitive load drive capability.
By commercializing high-performance smart switches tailored to zonal controllers’ requirements, ROHM is contributing to automotive electrification and the elimination of mechanical fuses.
Going forward, ROHM remains committed to improving safety, security, and energy efficiency in the automotive field by continuing to develop high reliability, high performance devices.
Application Examples
Body applications, powertrain/inverter systems, other switch-related circuits
Pricing and Availability
Sales Launch Date: Now | Pricing: 4.1 US$/unit (samples, excluding tax) | Online Distributors: Digi-Key, Mouser, and Farnell
Part Nos: BV1HB008EFJ-CE2, BV1HB012EFJ-CE2, BV1HB020EFJ-CE2, BV1HB040EFJ-CE2, BV1HB090EFJ-CE2, BV1HB180EFJ-CE2
