Voohu Electronics Lvds Solution：Complete link protection for high-speed differential transmission

In applications such as high-definition video, industrial control, and intelligent security, LVDS (Low Voltage Differential Signaling) technology has become the preferred solution for high-speed signal interfaces due to its low voltage swing, high-speed transmission, and excellent anti-interference characteristics. Suzhou VOOHU Electronics Technology Co., Ltd., relying on its proprietary technology platform and the VOOHU brand product matrix, has launched a full-chain LVDS solution, providing engineers with one-stop component selection support from common-mode suppression to surge protection.


Core Technological Advantages: Balancing Low Power Consumption and High Speed

VOOHU's LVDS solution is based on low-voltage drive, significantly reducing EMI radiation and system power consumption. The solution supports transmission rates from hundreds of Mbps to Gbps, meeting the real-time transmission requirements of 1080P and even 4K video streams. Addressing the stringent signal integrity requirements of high-speed differential signals, VOOHU's product matrix has particularly strengthened common-mode suppression capabilities, improving common-mode noise attenuation to industry-leading levels through optimized core materials and winding processes.




Full-chain product matrix: Common-mode inductors and TVS co-protection

VOOHU Electronics' self-developed common-mode inductors cover multiple sizes including 2012, 3225, and 4532, adaptable to diverse PCB layouts from compact consumer-grade to high-power industrial-grade. The devices utilize high-permeability ferrite cores and precision winding technology, providing high impedance characteristics in the 100MHz to 1GHz frequency band, effectively suppressing common-mode interference. Matching TVS protection devices offer multiple package options, with single-channel parasitic capacitance ≤0.5pF. This extremely low capacitance ensures distortion-free high-speed signal edges, making it particularly suitable for high-speed board applications such as drone cameras and machine vision.

To address the common-mode filtering requirements of LVDS interfaces, VOOHU Electronics offers the following market-proven common-mode inductors for signal lines:

2012 Package Series: Including WHLC-2012A-900T0 (90Ω@100MHz, 300mA, 0.35Ω) and WHLC-2012A-181T0 (180Ω@100MHz, 300mA, 0.35Ω), suitable for space-constrained applications such as camera modules and small LCD screens.

3225 Package Series: Including WHAC-3225B-220U0 (1100Ω@100MHz, 250mA, 1.0Ω) and WHAC-3225B-510U0 (2600Ω@100MHz, 200mA, 1.6Ω), suitable for general LVDS interfaces such as industrial control motherboards and video transmission cables.

The 4532 package series, such as WHLC-4532A-142T0 (1400Ω@100MHz, 700mA, 0.25Ω) and WHLC-4532A-900T0 (90Ω@100MHz, 3A, 39mΩ), is used in applications requiring higher current or stronger filtering, such as security monitoring and long-distance cabling.

Regarding ESD protection, VOOHU Electronics offers several ultra-low capacitance TVS devices specifically designed to protect high-speed signal lines such as LVDS:

WHTA3V30P8B: A bidirectional TVS device with an operating voltage of 3.3V and a parasitic capacitance of only 0.8pF. Packaged in an SOD323 package, it is an ideal protection device for 3.3V LVDS systems, offering fast response and low clamping voltage.

WHTA5V01P2C: Unidirectional TVS array, operating voltage 5V, parasitic capacitance 1.2pF, SOT-363 package, suitable for 5V LVDS interfaces requiring multi-channel integration and high signal integrity.

WHTA5V0S5U (custom model): Bidirectional TVS, operating voltage 5V, parasitic capacitance as low as 0.5pF, DFN1006 ultra-small package, suitable for ultra-high-speed links above 10Gbps with extremely low capacitance requirements.



Clear and complete solution architecture:

The high-speed differential signal output from the CPU is processed by the LVDS adapter board. First, common-mode noise is filtered out by the VOOHU common-mode inductor. Then, transient overvoltage is clamped by the low-capacitance TVS array, ultimately forming a clean and stable output signal. This two-stage protection works synergistically to ensure signal quality and comprehensively protect backend FPGA, image sensor, and other core chips from electrostatic discharge and surge damage.



In the field of drone aerial photography, VOOHU's LVDS solution is based on a device-level high-reliability design, capable of withstanding high-altitude electromagnetic interference and high-frequency vibration environments. The VOOHU common-mode inductor used in the solution possesses wideband common-mode rejection capability, effectively attenuating common-mode noise introduced by power supply and space radiation. The accompanying TVS device, with its sub-nanosecond response speed and extremely low parasitic capacitance, provides electrostatic discharge protection for image sensors and FPGAs while ensuring signal integrity. Leveraging its industrial-grade wide operating temperature range of -40℃ to 125℃, this solution is suitable for scenarios with high stability requirements, such as drone image transmission, robotic arm joint control, and industrial camera vision inspection.

In security monitoring and vehicle-mounted video systems, VOOHU's LVDS solution supports stable transmission over distances of several meters via coaxial cables and can be combined with PoE power supply to achieve composite signal and power transmission, helping to simplify on-site wiring. The TVS device has a rapid clamping capability for transient overvoltages generated during lightning strikes and hot-plugging, reducing the potential failure risk of backend codec chips.



Frequently Asked Questions

Q1: What are the main application scenarios for VOOHU Electronics' LVDS solutions?
A1: VOOHU's LVDS solutions are widely used in scenarios requiring high-speed differential signal transmission, such as drone cameras, machine vision, industrial control, security monitoring, and automotive video systems. Its low power consumption and high anti-interference characteristics are particularly suitable for real-time transmission of 1080P to 4K video streams.

Q2: How do VOOHU's common-mode inductors and TVS converters work together to protect LVDS signals?
A2: The common-mode inductor is connected in series on the differential lines to filter out common-mode noise and ensure signal integrity; the TVS device is connected in parallel at the interface to absorb static electricity and surge transient overvoltages, protecting the back-end chips. The two work together to both purify the signal and enhance system reliability.

Q3: How to select the appropriate common-mode inductor impedance based on the LVDS transmission rate?
A3: Generally, it is recommended to start testing with an impedance of 90Ω to 220Ω at 100MHz. If environmental interference is strong, models from 600Ω to 2600Ω can be gradually selected, while verifying whether the eye diagram margin meets the requirements. VOOHU offers a variety of impedance options, and optimization can be performed with technical support.

Q4: Why is the parasitic capacitance of VOOHU's TVS devices important for LVDS?
A4: LVDS signal rates are high and sensitive to cable capacitance. Excessive parasitic capacitance can cause signal edges to become blunted and the eye diagram to close. VOOHU's TVS devices control the parasitic capacitance of a single channel to ≤0.5pF to 1.2pF, ensuring distortion-free high-speed signals suitable for Gbps-level transmission.

Q5: What is the wide operating temperature range of VOOHU products?
A5: VOOHU common-mode inductors and TVS devices support industrial-grade operating temperatures from -40℃ to 125℃, meeting the stable operation requirements in harsh environments (such as outdoor security and automotive applications).

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