company blog about Supply ON Diodes Evaluation Board:Schottky Diode,ESD Protection Diode,Zener Diode,RF Diode

Supply ON Diodes Evaluation Board:Schottky Diode,ESD Protection Diode,Zener Diode,RF Diode

Shenzhen Mingjiada Electronics Co., Ltd. is a globally renowned authorised independent distributor of electronic components, specialising in providing comprehensive electronic component supply services from chips to module.

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1. Evaluation boards for ESD protection diodes

Typical devices and evaluation methods: For multi-channel ESD protection arrays such as the CM1230, engineers typically design evaluation boards themselves based on the device datasheet. Key tests focus on clamping voltage, parasitic capacitance, and multiple surge endurance to ensure signal integrity in high-speed interfaces (e.g., USB 3.0, HDMI).

Selection guidance: For single-channel protection diodes like the ESD9B5.0ST5G, evaluation centres on response speed, clamping accuracy, and thermal performance within compact packaging. Key selection criteria include operating voltage, junction capacitance, and compliance with ESD standard ratings (e.g., IEC 61000-4-2).

2. Evaluation Board for RF Diodes

Evaluation kit example: ON Semiconductor's AXM0F343-256-915-1-GEVK evaluation kit provides a complete solution for assessing system-level performance of integrated RF transceivers with MCUs.

Testing scope: Whilst primarily focused on the SoC as a whole, engineers can utilise it to evaluate RF front-end matching networks, harmonic suppression, and sensitivity – factors directly related to the performance of internal or external RF diodes.

3. Universal Evaluation Approach for Schottky/Zener Diodes

Employ universal power evaluation boards: e.g., EVBUM2878G-EVB (for full-bridge modules) or ONS321xG-EVB (for synchronous buck converters). You may substitute different Schottky (for rectification) or Zener (for voltage regulation) diodes on these boards to evaluate their efficiency, temperature rise, and reverse recovery characteristics within actual switching power supply topologies.

Core test metrics: For Schottky diodes, focus on forward voltage drop, reverse leakage current, and switching speed; for Zener diodes, assess voltage regulation accuracy, dynamic resistance, and temperature coefficient.

Schottky Diode

High-speed switching, low power consumption: Utilises its low forward voltage drop (Vf) to minimise losses, suitable for high-frequency rectification, voltage clamping, etc.

1. Forward voltage drop (Vf): Directly influences conduction losses.

2. Reverse voltage rating (Vr): Determines maximum operating voltage.

3. Package Size: Such as SOT-723 for compact spaces.

ESD Protection Diode

Transient Voltage Protection: Used in high-speed interfaces like USB and HDMI to clamp transient overvoltages such as electrostatic discharge (ESD).

1. Clamping Voltage: The minimum transient voltage that can be restricted.

2. Junction capacitance: Must be sufficiently low (e.g., 15 pF) to prevent signal distortion.

3. Response time: Typically less than 1 nanosecond.

Zener diodes

Voltage reference and regulation: Utilises reverse breakdown characteristics to provide stable voltage.

1. Zener voltage (Vz): Core regulation value.

2. Rated power: Determines tolerable power handling.

3. Voltage tolerance: Affects voltage regulation accuracy.

RF diodes

High-frequency signal processing: Employed in RF circuits such as high-frequency switching, detection, and mixing.

1. Cutoff frequency: Determines maximum operating frequency.

2. Parasitic parameters: Junction capacitance and series inductance are critical.

3. Insertion loss and isolation: Particularly crucial for switching applications.