JIUYOU Primary Agent Current Sensor JYM49178

The JYM49178 series is an open-loop Hall-effect current sensor IC offering high precision, wide bandwidth, fast response, excellent linearity, and low temperature drift. The chip provides a 0-100A current sensing range with an internal differential Hall structure that effectively rejects external stray magnetic fields. JYM49178 delivers a new solution for high-performance current sensing applications.

This high-performance single-ended output linear current sensor accurately measures both AC and DC currents and is widely used in industrial, consumer, and communication equipment. The integrated dynamic offset cancellation circuit ensures sensor sensitivity remains unaffected by external mechanical stress and IC package stress. Available in SOIC-10 package with an operating temperature range of -40℃ to 125℃, fully RoHS compliant.

Product Selection Guide

※ Continuous operation at 100A supported at 25℃. For extended range or elevated temperatures, refer to the derating curve for thermal management.

Pin Configuration (SOIC-10)

Note: NC pins must be left floating. Do not connect to VCC, GND, or any signal.

Key Electrical Specifications

Accuracy Characteristics (JYM49178-050FB Typical)

Note: Accuracy parameters for 080FB and 100FB models vary slightly. Refer to the datasheet for details.

Target Applications

• ● Inverter Current Sensing

• ● Motor Phase Current Detection

• ● Battery Load Monitoring Systems

• ● Current Transformers

• ● Switch-Mode Power Supplies (SMPS)

• ● Overcurrent Protection Devices

Key Advantages

• ● High-Current, High-Precision 0-100A Sensing

• ● Ultra-Low Primary Conductor Resistance: 0.27mΩ

• ● Zero-Current Offset Drift: ±2mV, Sensitivity Drift: ±0.2%

• ● Linearity Error: ±0.05%

• ● High Bandwidth: 250kHz, Fast Response: 1.2μs

• ● Differential Hall Structure for Effective Stray Field Rejection

• ● Isolation Withstand Voltage: 5000Vrms

• ● 3.3V/5V Compatible with RatioMetric/Fixed Output Options

• ● Standard SOIC-10 Package, -40℃ to 125℃ Wide Temperature Range

Functional Block Diagram

The chip integrates a differential Hall sensing element, dynamic offset cancellation circuitry, signal conditioning amplifiers, and an output driver stage. The magnetic field generated by current flowing through the low-impedance primary conductor is sensed by the differential Hall element, amplified, and output as a voltage proportional to the current at VOUT.

Typical Application Circuit

Standard application: Connect a 0.1μF decoupling capacitor between VCC and GND; place a 1nF capacitor at the VREF pin; VOUT can be directly connected to an ADC for sampling; primary current flows in through IP+ and out through IP-. Recommended output load resistance RL ≥ 4.7kΩ, reference load resistance RLREF ≥ 10kΩ.

Package Information (SOIC-10)

Isolation Specifications

Absolute Maximum Ratings

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device.

ESD Ratings

JEDEC JEP155 states that 500V HBM allows safe manufacturing with standard ESD control processes.

Dynamic Response Characteristics

• Power-On Time Tpo: Time required for the output voltage to stabilize within ±10% of its final value after the supply reaches the minimum specified operating voltage. Typical: 1ms.

• Rise Time Tr: Time interval between the output reaching 10% and 90% of its full-scale value. Typical: 1.0μs.

• Propagation Delay Tprop: Time interval between the sensed current reaching 20% of full scale and the sensor output reaching 20% of full scale.

• Response Time Tresponse: Time interval between the sensed current reaching 90% of full scale and the sensor output reaching 90% of full scale. Typical: 1.2μs.

Distribution & Technical Support

GSMicro Semiconductor is an authorized JIUYOU distributor, stocking the full JYM49178 series with inventory available. We provide free datasheets, reference schematics, and PCB layout guidelines. Support includes sample requests, small-batch prototyping, and long-term high-volume supply. Our application engineers offer one-on-one technical support for current sensor circuit debugging and EMC compliance, serving industrial control, power management, renewable energy, and automotive markets.

Frequently Asked Questions