In depth analysis of Jiangsu Changjing DW52C4V7LED02 and WBFBP-02C voltage regulator diode products

In depth analysis of Jiangsu Changjing DW52C4V7LED02 and WBFBP-02C voltage regulator diode products
product overview
The DW52C4V7LED02 voltage regulator diode and WBFBP-02C package series launched by Jiangsu Changjing Electronics are core components designed for modern electronic devices that require high precision, small size, and high reliability. This series of products is based on Zener diode technology and achieves stable output under wide voltage range and low power consumption conditions through optimized materials and processes. It is widely used in consumer electronics, industrial control, new energy and other fields.
Detailed explanation of technical parameters
Core electrical characteristics
Voltage regulation value (Vz): The nominal voltage regulation value of DW52C4V7LED02 is 4.7V, with a voltage tolerance controlled within ± 5%, ensuring accurate voltage reference in reverse breakdown state.
Rated power (Pd): The maximum dissipated power reaches 100mW (some models such as DW52C7V5LED02 have 200mW), suitable for different load requirements.
Dynamic impedance (Zz): The typical value is 15 Ω (taking DW52C7V5LED02 as an example). The low impedance design effectively reduces voltage fluctuations and improves circuit stability.
Reverse current (Ir): At a reverse voltage of 6V, the leakage current is as low as 0.5mA, significantly reducing static power consumption.
Packaging and Physical Characteristics
Packaging form: Adopting WBFBP-02C ultra small pinless surface mount packaging, with a size of only 0.95mm × 0.55mm, supporting high-density PCB layout and automated assembly.
Thermal performance: The thermal resistance θ JA is 1250 ° C/W, combined with a wide temperature range of -65 ° C to 150 ° C, ensuring reliability in high or low temperature environments.
Environmental certification: Compliant with RoHS standards, lead-free and halogen-free, suitable for green manufacturing requirements.
Electrical Safety and Reliability
Overvoltage protection: When the power supply voltage rises abnormally, the voltage regulator quickly breaks down and conducts, triggering the protection mechanism.
Pulse tolerance: The performance is stable under short-term pulse testing, but continuous load needs to be combined with heat dissipation design.
Product Advantage Analysis
Technological innovation points
Material optimization: Using high-purity semiconductor materials to reduce reverse leakage current and improve the consistency of breakdown voltage.
Structural design: Ultra thin packaging and short pin design reduce parasitic inductance and adapt to high-frequency circuit requirements.
Temperature compensation: Built in temperature compensation circuit, with a voltage stabilization deviation of less than ± 2% within the range of -40 ° C to 130 ° C.
Performance Comparison
Parameter DW52C4V7LED02 competitor MMSZ5238CS
Voltage stabilization value (V) 4.7 8.7
Power consumption (mW) 100 200
Package size WBFBP-02C SOD-323
Reverse leakage current (μ A) 0.5@6V     3@6.5V
Application scenario analysis
Typical Circuit Design

Power stabilization module
In a switching power supply, DW52C4V7LED02 is combined with a transistor to form a series regulator circuit, providing a constant 12V output to the load.


overvoltage protective system
When the voltage of the main power supply EC of the TV is abnormal, the voltage regulator tube conducts and triggers the relay, cutting off the connection between the load and the power supply.


Arc suppression scheme
The electromagnetic valve coil is connected in parallel with a voltage regulator to eliminate the high back electromotive force generated when the switch is disconnected.

Industry Solutions
Consumer electronics: voltage reference in mobile phone charging circuits and LED driver power supplies.
Industrial control: Overvoltage protection for PLC input modules and servo motor drivers.
New energy: MPPT tracking for photovoltaic inverters, voltage stability for wind power converters.
Selection and Usage Guide
Key selection parameters
Voltage regulation value matching: Select the Vz value according to the circuit requirements, leaving a margin of 5% -10%.
Power consumption calculation: Pd needs to be greater than the actual load power to avoid overheating failure.
Packaging compatibility: Confirm that the PCB layout supports the pad size of WBFBP-02C.
Design and Testing Suggestions
Layout optimization: The voltage regulator should be close to the protected device to reduce wiring inductance.
Temperature monitoring: Add heat sinks or ventilation design in high temperature environments.
Aging test: It is recommended to conduct a 48 hour high-temperature aging screening before batch use.
Market and Industry Trends
With the popularization of 5G base stations, new energy vehicles, and IoT devices, the market's demand for miniaturized and highly reliable voltage stabilizing components has surged. Jiangsu Changjing achieves a balance between performance and cost in the WBFBP-02C series through vertical integration of manufacturing and material innovation.
conclusion
DW52C4V7LED02 and WBFBP-02C packaged voltage regulator diodes have become the preferred solution for electronic engineers in the fields of precision voltage regulation and overvoltage protection due to their precise electrical characteristics, compact packaging design, and comprehensive environmental adaptability. In the future, with the introduction of third-generation semiconductor materials, this series of products is expected to demonstrate superior performance in higher frequency and higher temperature scenarios.