JIUYOU Primary Agent Current Sensor JYM49168

The JYM49168 series from JIUYOU Microelectronics is an open-loop Hall-effect current sensor IC that integrates high precision, high bandwidth, fast response, high linearity, and low temperature drift. It provides a 0‑50A current sensing range, delivering a new solution for high-performance current sensor applications.

The chip features an internal differential Hall structure that effectively suppresses external stray magnetic field interference, ensuring measurement stability in complex electromagnetic environments. With 3000Vrms isolation between the primary conductor and the sensing circuit, it is widely applicable in industrial, consumer, and communication equipment. Compatible with 3.3V/5V supplies, it supports both ratiometric and fixed output modes for flexible system integration.

The integrated dynamic offset cancellation circuit ensures that sensor sensitivity remains immune to external stress and IC package stress. The JYM49168 series comes in an SOP8 package with an operating temperature range of -40~125℃, is RoHS compliant, and serves as an ideal replacement for traditional current transformers.

Ordering Information / Product Series

Key Features & Advantages

• ● High-Current, High-Precision: Supports 0‑50A current sensing with total output error as low as ±0.6% (typical)

• ● Ultra-Low Primary On-Resistance: 0.85mΩ typical / 1.2mΩ maximum, minimizing power loss and heat generation

• ● Excellent Temperature Drift Performance: Zero-point drift ±2mV (typical), sensitivity drift ±0.5% (typical), stable across full temperature range

• ● High Linearity: Linearity error ±0.1% (typical), ensuring highly linear output vs. sensed current

• ● High Bandwidth & Fast Response: 250kHz bandwidth, 1.6μs response time, ideal for high-frequency transient current measurement

• ● Differential Hall Rejects Interference: Effectively suppresses external stray magnetic fields, improving measurement stability

• ● Strong Isolation: 3000Vrms isolation voltage ensures safe isolation between high-voltage and low-voltage sides

• ● Flexible Supply & Output: Compatible with 3.3V/5V supplies, supports both ratiometric and fixed output modes

• ● Wide Temperature Range: -40~125℃, suitable for harsh industrial environments

• ● Compact Package: SOP8 package saves PCB space and is RoHS compliant

Key Electrical Specifications (Typical Values)

Pin Configuration & Functions

The JYM49168 series comes in an SOP8 package. Pin functions are defined as follows:

Internal Block Diagram

The IC integrates a differential Hall sensing element that effectively rejects common-mode magnetic field interference. The magnetic field generated by the primary current is sensed by the differential Hall element, amplified, filtered, and output as an analog voltage proportional to the current. The integrated dynamic offset cancellation circuit ensures long-term stability.

Typical Application Circuit

The application circuit is simple: the sensed current flows from IP+ to IP- (internal on-resistance is extremely low, voltage drop is negligible); VCC is powered by 3.3V or 5V; the OUT pin outputs an analog voltage proportional to the current; and the VREF pin is used for reference voltage setting (input reference for ratiometric mode, output reference for fixed mode). The differential Hall structure effectively rejects external magnetic field interference, eliminating the need for additional magnetic shielding.

The 250kHz bandwidth and 1.6μs fast response time enable accurate capture of transient current changes, making it suitable for inverters, motor control, switch-mode power supplies, and more.

Target Applications

• ● Inverter current sensing (PV inverters, variable frequency drives)

• ● Motor phase current sensing (servo, stepper, BLDC)

• ● Battery load detection systems

• ● Current transformer replacement

• ● Switch-mode power supply current monitoring

• ● Overcurrent protection devices, smart circuit breakers

Functional Description

1. Operating Principle

The JYM49168 uses the open-loop Hall-effect principle. The sensed current generates a magnetic field in the magnetic core proportional to the current, which is converted to a voltage signal by the differential Hall element, amplified, filtered, and output. The differential structure effectively cancels external common-mode magnetic field interference.

2. Sensitivity & Range

Multiple ranges are available including ±10A, ±20A, ±30A, ±40A, ±50A, and 30A unidirectional. Different ranges correspond to different sensitivities (see Ordering Information table). Users can select the appropriate model based on the actual current range to be measured.

3. Output Modes

Supports both ratiometric output (VREF scales proportionally with VCC) and fixed output (VREF internally fixed) modes, flexibly adapting to different ADC reference voltage requirements.

4. Isolation & Insulation

The primary and secondary sides provide 3000Vrms isolation voltage, meeting industrial safety standards.

5. Temperature Compensation

Built-in temperature compensation circuitry ensures sensitivity temperature drift of ≤ ±0.5% (typical) and zero-point drift of ≤ ±2mV (typical) across the full temperature range, maintaining high-accuracy measurement.

6. Dynamic Offset Cancellation

Eliminates the effects of external stress and package stress, ensuring long-term stability.

Product Selection Comparison Table (Typical Models)

Product Advantages

Compared with traditional current transformers, the JYM49168 series offers significant advantages:

• ● Small size, lightweight: SOP8 package saves PCB space

• ● High bandwidth, fast response: 250kHz bandwidth, 1.6μs response time, capable of measuring high-frequency transient currents

• ● High precision, low drift: Stable measurement across the full temperature range with low error

• ● Differential Hall rejects interference: Effectively suppresses external magnetic fields, suitable for complex electromagnetic environments

• ● Strong isolation: 3000Vrms isolation voltage, safe and reliable

• ● AC/DC measurement: Supports both AC and DC current sensing

• ● Cost-effective: Stable supply, ideal for import substitution

The JYM49168 series is the ideal choice for applications demanding high precision, fast response, and high reliability in current sensing.

Brand & Distribution Services

JIUYOU (Xi'an) Microelectronics Co., Ltd. is a high-tech enterprise integrating R&D, manufacturing, and sales. As a developer and manufacturer of Hall-effect magnetic sensor ICs, the company owns proprietary intellectual property in Hall linear circuits, switch circuits, and magnetic sensors. The company consistently utilizes advanced CMOS, BICMOS, BIPOLAR, and BCD design processes and manufacturing technologies.

GS-Micro Semiconductor (Shenzhen) Co., Ltd. is an authorized distributor of JIUYOU Microelectronics, specializing in high-precision magnetic sensor ICs and signal chain solutions. We offer the full range of JYM49168 series Hall-effect current sensors, Hall switches, linear Hall sensors, and more. We serve industrial control, new energy, automotive electronics, and other sectors with high-reliability magnetic sensing products and technical support. With stocking locations in Shenzhen, Shanghai, and Beijing, we ensure fast delivery to domestic and international customers.