From single to eight channels full coverage, AEC-Q100 certified, μA-level quiescent current, HALO Microchip High/Low-Side Switch series provides complete power distribution protection solutions for ADAS, Smart Cockpit, and Control.
With the rapid evolution of Automotive Electrical Architecture (EEA) towards domain centralization and intelligence, High/Low-Side Switches, as the core protection devices for vehicle power distribution systems, are experiencing significant demand growth alongside vehicle intelligence. HALO Microchip recently officially released its complete Automotive-Grade High/Low-Side Switch series, covering single-channel, 2-channel, 4-channel, and 8-channel full product range, and has taken the lead in passing AEC-Q100 certification, providing high-reliability domestic alternative solutions for China's New Energy Vehicle industry.
High-Side Switch is installed between the load and the positive power supply, while Low-Side Switch is installed between the load and ground. Both together constitute the core defense line of automotive power distribution protection. Compared with traditional fuse and relay combinations, High/Low-Side Switches have three major advantages: precise over-current protection, real-time diagnosis, and resetability, and have become standard components for smart vehicles.
Industry Trend: New Energy Vehicles have 2~3 times the electrical load count of traditional fuel vehicles. High/Low-Side Switch per-vehicle usage increases significantly with assisted driving level—L2 vehicles about 50 units, L3 and above can reach over 100 units.
The core highlights of HALO Microchip's newly released Automotive-Grade High/Low-Side Switch series are single-chip design + full-stack protection + multi-channel flexible configuration, which can cover various power distribution requirements from simple Control to high-complexity ADAS Domain Controllers.
| Part Number | Channels | Type | Supply Voltage | Typical RON |
|---|---|---|---|---|
| HL8518 | Single Channel | High-Side Switch | 4.5V ~ 40V | — |
| HL85216 | 2 Channels | High-Side Switch | 4.5V ~ 40V | 160mΩ |
| HL85416 | 4 Channels | High-Side Switch | 4.5V ~ 40V | — |
| HL85875 | 8 Channels | High-Side Switch | 4.5V ~ 40V | — |
| HL85105L | Single Channel | Low-Side Switch | — | — |
▲ HALO Microchip High/Low-Side Switch Series Core Part Numbers (Continuously Updating)
Different from traditional multi-chip solutions, HALO High-Side Switch adopts single-chip design with fewer bonding wires, significantly improving solder joint reliability. This design advantage is particularly important in vehicle vibration and high-low temperature cycling environments, directly affecting the long-term operational stability of the vehicle power distribution system.
Each HALO High-Side Switch has built-in four core protection functions, forming a complete protection-diagnosis-reporting closed loop:
New Energy Vehicles are extremely sensitive to quiescent current—battery drain directly affects the next startup. HALO HL85216 standby current is as low as < 0.5μA (typical value), at the industry leading level, which can effectively reduce leakage current during vehicle sleep mode and extend battery standby time.
Vehicle environmental temperature range is extremely wide: engine compartment can reach +125°C, body exterior sensors can reach -40°C in severe cold. The entire HALO series supports -40°C ~ +150°C operating junction temperature range, matching the most stringent vehicle environmental requirements, and has passed AEC-Q100 certification.
High-Side Switch provides short-circuit and over-current protection for power supply lines of cameras, millimeter-wave radars, LiDAR and other sensors, serving as the cornerstone of ADAS system power distribution.
Power distribution protection for in-vehicle displays, ambient lighting, audio, seat control and other modules, supporting flexible selection of multi-channel devices.
Intelligent power distribution for traditional body loads such as lights, door locks, power windows, and wipers, supporting zonal architecture.
Power distribution protection for key paths such as relay driving and sensor power supply in battery management systems, supporting 40V high-voltage operating range.
In the Automotive-Grade High-Side Switch field, it has long been dominated by international manufacturers such as Infineon, NXP, and ST. HALO Microchip series has formed clear competitive advantages in the following dimensions:
In addition to the High/Low-Side Switch series, HALO Microchip simultaneously launched multiple automotive power supporting chips, building a complete Automotive-Grade Power Management matrix:
As HALO Microchip's primary distributor, Etamicro is equipped with a professional FAE team that can provide High/Low-Side Switch selection consulting, schematic design guidance, sample application and mass production support services. For product datasheets, samples or support, please contact our technology team.
March 3, 2026 · Authorization Announcement
2026 · Industry Analysis
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