OH34N - SOT23-3 Single-Pole Hall Effect Switch IC

The OH34N is a single-pole Hall effect switch IC designed for various position and speed detection applications. It features a wide operating voltage range, fast switching speed, and excellent consistency. The device is internally composed of a reverse voltage protector, voltage regulator, Hall voltage generator, differential amplifier, Schmitt trigger, and an open-collector output stage, converting magnetic field signals into digital voltage outputs. Its small SOT23-3 package and N-pole triggering make it suitable for compact designs.

Product Attributes

• Brand: Nanjing OuZhuo Technology Co., Ltd.
• Origin: China
• Product Model: OH34N
• Package: SOT23-3
• Packaging: 3000 pcs/reel

Technical Specifications

Product Features & Applications

Features: Wide operating voltage range, fast switching speed, wide operating frequency with good consistency, customizable sensitivity, direct interface with various logic circuits.

Functions: Non-contact switch, position detection, speed detection, flow detection.

Typical Application Fields: Brushless DC motors, DC fans, DC water pumps, home appliance control boards, sewing equipment, textile machinery, speed sensing, counting, industrial control fields, flow sensors, flow meters, automotive igniters, security alarm devices.

Usage Notes

1. For open-collector (OC) output circuits, a pull-up resistor (RL) is required between the power supply and the output terminal. 2. It is recommended to add protection circuits, such as large capacitors and Zener diodes, to absorb power fluctuations, especially in harsh environments like brushless DC motors and automotive electronics. 3. Avoid reverse polarity connection; while some models have internal reverse protection, prolonged reverse connection can cause damage. CMOS circuits require anti-static protection. 4. Minimize mechanical stress on the device and leads during installation and handling. Avoid stress within 3mm of the lead root. 5. Consider magnetic field attenuation, temperature, and motion when designing applications. Use a Gaussmeter to measure magnetic field strength for accurate selection. 6. High temperatures can damage the device. Strictly adhere to soldering temperature and time limits: manual soldering should not exceed 260 for less than 3 seconds. Refer to lead-free soldering processes for reflow and wave soldering, with a typical reflow profile provided.