Jiangsu Changjing Technology Co., Ltd. (JSCJ) is a company specializing in the research and development, production, and sales of semiconductor products. Its product line covers a wide range, mainly divided into discrete devices, power management ICs, third-generation semiconductors, and wafers. The following are the classifications and characteristics of its core products:
1、 Discrete components
Diode
Rectifying diode: Maximum average rectified current of 1A~60A, reverse voltage coverage of 50V~2000V, used in AC to DC circuits, typical models such as 2CZ4007 series.
Zener diode: with a stable voltage range of 1.8V~330V, it has the characteristics of low dynamic impedance and high temperature stability. Recommended models include MMSZ5238CS, BZT52C5V1H, etc.
Variable capacitance diode: used for high-frequency tuning and communication circuits, regulating junction capacitance through reverse voltage, supporting applications such as automatic frequency control (AFC).
Schottky diode: such as SP1045L, with low forward voltage drop and high efficiency characteristics, suitable for high-frequency switching scenarios.
Fast recovery/high-efficiency diode: suitable for high-frequency power conversion and industrial control fields.
Transistor
Including bipolar transistors (such as MMBT3906, 2SD1815) and field-effect transistors (MOSFETs), they are widely used in signal amplification and switching circuits.
Power devices
MOSFET: covering consumer, industrial, and automotive standards, supporting high-power switching requirements.
IGBT single tube/module: suitable for industrial motor drive and new energy fields, such as electric vehicle inverters.
2、 Power Management IC
Linear voltage regulator (LDO)
Such as CJ7550S SOT893L, it provides stable low voltage drop output and is suitable for low-power devices.
DCDC converter
Support high-performance voltage conversion to meet industrial and automotive grade requirements.
Lithium battery protection chip
Used for battery management systems to prevent overcharging, overdischarging, and short circuits.
3、 Third generation semiconductor
High performance devices based on silicon carbide (SiC) and gallium nitride (GaN) materials, such as SiC SBD (silicon carbide Schottky diode) and GaN power devices, have high temperature, high frequency, and high efficiency characteristics, suitable for new energy and high-end industrial fields.
4、 Other products
Wafer
Provide semiconductor wafer foundry services to support customized customer needs.
Static and Surge Protection Devices (ESD/TVS)
Used for circuit protection to prevent equipment from being damaged by static electricity and transient voltage.
Application Fields
The product is widely used in consumer electronics (such as mobile phones, home appliances), industrial control (such as motor drives, power systems), automotive electronics (such as car power supplies, battery management) and other fields, and meets automotive grade standards.
