Compact Hall Effect Current Sensors from Diodes Incorporated Reduce Power Loss
Diodes Incorporated has introduced the AHC1724Q and AHC1725Q automotive-compliant Hall effect current sensors, designed to meet the demands of the expanding electric vehicle (EV) market and its charging infrastructure. Announced on November 10, 2026, these devices offer accurate, galvanically isolated alternating current (AC) and direct current (DC) measurements. Their key differentiators include low primary conductor resistance and a compact physical design, which contribute to reduced power loss and optimized printed circuit board (PCB) space in applications such as EV onboard chargers (OBC) and charging stations.
These sensors integrate a low-resistance copper conduction path with a linear Hall sensor circuit, providing current measurement capabilities with a typical primary conductor resistance of 1.2mΩ. This ultra-low resistance minimizes power dissipation, while the sensors' ability to withstand high inrush currents ensures reliable operation under demanding electrical conditions. Both the AHC1724Q and AHC1725Q support current measurement ranges up to ±50A, offering both unidirectional and bidirectional measurement options.
A significant feature of these devices is their electrically isolated primary conductive path and sensor arrangement, which enables high-side current sensing without the need for high-side differential amplifiers or other costly isolation techniques. They support a maximum working voltage of 420VDC for basic isolation, compliant with UL 62368-1. The compact, low-profile SO-8 (Type CJ2) surface-mount package further helps reduce PCB space. For enhanced accuracy and response, the sensors utilize a low-offset, chopper-stabilized architecture with post-packaging trimming, providing an analog output proportional to the measured current and ratiometric to the supply voltage. They offer a 120kHz analog output bandwidth, a typical response time of 4.0µs, and a typical propagation delay of 2.0µs, supporting rapid detection of current changes across an operating temperature range of -40°C to +150°C.
While the AHC1724Q operates from a 4.5V to 5.5V supply and measures current from ±2.5A to ±50A, the AHC1725Q functions with a 3.0V to 3.6V supply and measures from ±5A to ±50A. Diodes Incorporated also offers standard-compliance versions, the AHC1724 and AHC1725, for industrial and commercial applications. The automotive-compliant AHC1724Q and AHC1725Q are AEC qualified, manufactured in IATF 16949 certified facilities, and support PPAP documentation, underscoring their suitability for rigorous automotive environments.
Source Link: Press Release
Specifications
| Specification | Value |
|---|---|
| Product Type | Automotive-compliant Hall effect current sensor |
| Supply Voltage | 3.0V to 5.5V |
| Current Measurement Range | ±2.5A to ±50A |
| Typical Primary Conductor Resistance | 1.2mΩ |
| Maximum Working Voltage (Basic Isolation) | 420VDC |
| Analog Output Bandwidth | 120kHz |
| Typical Response Time | 4.0µs |
| Typical Propagation Delay | 2.0µs |
| Operating Temperature Range | -40°C to +150°C |
| Package | SO-8 (Type CJ2), surface-mount |
| Current Measurement Direction | Unidirectional and bidirectional options |
Key Features
- Integrated Hall effect sensing architecture combining a low-resistance copper conduction path with a linear Hall sensor circuit.
- Ultra-low typical primary conductor resistance of 1.2mΩ for minimized power dissipation.
- Capability to withstand high inrush currents, supporting demanding electrical conditions.
- Supports current measurement ranges extending up to ±50A, with both unidirectional and bidirectional options.
- Electrically isolated primary conductive path and sensor arrangement for high-side current sensing.
- Enables high-side current measurement without requiring high-side differential amplifiers or other costly isolation techniques.
- Supports a maximum working voltage of 420VDC for basic isolation, compliant with UL 62368-1.
- Low-offset, chopper-stabilized architecture with post-packaging trimming for accurate current measurement.
- Provides an analog output bandwidth of 120kHz, a typical response time of 4.0µs, and a typical propagation delay of 2.0µs.
- Analog output is proportional to the measured current and ratiometric to the supply voltage.
- Operates over a wide temperature range of -40°C to +150°C.
- Compact, low-profile SO-8 (Type CJ2) surface-mount package for space-constrained applications.
- Automotive-compliant versions are AEC qualified, manufactured in IATF 16949 certified facilities, and support PPAP documentation.
Applications
- Electric vehicle (EV) charging infrastructure
- Electric vehicle onboard chargers (OBC)
- EV charging stations
- Switched-mode power supplies (for standard versions)
- Load detection and management systems
- HVAC systems (for standard versions)
- Overcurrent fault protection
- Industrial and commercial equipment in harsh and high-temperature environments
Availability
Diodes Incorporated has announced the release of its AHC1724Q and AHC1725Q automotive-compliant Hall effect current sensors. The devices are available in compact, low-profile SO-8 (Type CJ2) surface-mount packages and are designed for accurate, galvanically isolated AC and DC current measurement. The AHC1724Q operates from a 4.5 V to 5.5 V supply, while the AHC1725Q operates from a 3.0 V to 3.6 V supply.
