Shanghai BELLING launches IGBT based automotive igniters - BLG3040/BLQG3040A
--Introduction
With the increasing cost of gasoline and people's growing concern about environmental issues caused by automobile exhaust emissions, the automotive industry is accelerating the research and development of new power transmission systems with lower fuel consumption, higher power density, and stronger robustness. The ignition system of a car, as an important component of the power transmission system, plays a crucial role in system efficiency, reducing exhaust pollution, and robustness. The primary winding of the coil in early car igniters was controlled by mechanical switches, commonly known as circuit breaker contacts. The contact ignition system of the circuit breaker is relatively simple and cost-effective, but it is prone to wear and tear. With the development of high-voltage and high current power switching devices in the semiconductor industry, traditional mechanical switches that are prone to wear and tear have been replaced by more reliable high-power semiconductor devices. At present, car igniters mainly use "plug-in" coils, eliminating high-voltage wiring, and integrating insulated gate bipolar transistor (IGBT) devices and their driving circuits, making the car ignition system more compact and simple. As shown in Figure 1, the current car igniter mainly consists of components such as circuit board, ignition coil, high-voltage diode, spring, sheath, anti-interference resistor, and socket.
Figure 1 Internal structure diagram of igniter
Working principle of the ignition
The schematic diagram of the IGBT based car igniter circuit and the physical diagram of the internal circuit board of a certain brand of car igniter are shown in Figure 2 and Figure 3, respectively.
Figure 2 Schematic diagram of ignition circuit
Figure 3 Physical picture of igniter circuit board
According to the working state of IGBT, the working principle of the car ignition circuit can be described in stages.
2.1 During the blocking phase, before the gate drive pulse is triggered, the gate voltage VGE is 0V, the IGBT device is in a blocking state, the collector voltage VCE is Vbat, and there is no stored energy in the inductor.
2.2 During the conduction stage, the gate drive pulse is triggered, and the gate voltage rises to a high level, VGE=+5V. After the IGBT is turned on, the power supply voltage will charge the primary leakage inductance of the coil, and the primary current begins to rise linearly. Due to the fact that the secondary side of the coil is equivalent to an open circuit before the spark plug generates an arc, energy is stored in the coil core.
2.3 Shutdown Process: When the appropriate ignition time is detected, the control signal will become low, causing the IGBT to turn off. The rapid shutdown of the primary side current will generate a high voltage spike at both ends of the IGBT device. Usually, there is a clamping structure between the gate and collector inside the ignition IGBT. The clamping structure will limit the peak voltage between 300V-600V to protect the ignition IGBT and coil insulation. During the shutdown process, the energy stored in the coil leakage inductance will generate voltage spikes on the primary side, while the energy stored in the excitation inductance will induce high voltage on the secondary side, causing arcing between the spark plug air gaps. The maximum ignition voltage under normal operating conditions depends on the engine design, and lighter air-fuel mixtures or turbocharged engines require higher ignition voltage. Three Shanghai Beiling BLG3040 products
Shanghai Beiling has always served the overall national strategy and has been continuously investing in the research and development of automotive grade chips in recent years, contributing to the development of automotive grade chips in China. In response to the market demand for automotive ignition devices, the company actively developed the first domestically produced automotive grade ignition IGBT device BLG3040 and achieved mass production and sales. At present, this product has been applied and widely praised among many mainstream automotive igniter customers.
3.1 Product Performance Advantages: Beiling BLG3040 has excellent product performance, with the main performance parameters as follows:
High breakdown voltage can provide higher ignition voltage;
The threshold voltage VTH is low and compatible with logic levels, making the driving circuit simpler and reducing system costs;
Low saturation voltage drop VCE (SAT) can reduce IGBT conduction loss and lower device operating temperature rise;
The self clamping switch energy ESCIS and self clamping switch current ISCIS have strong tolerance;
Figure 4 Comparison of IGBT performance among different brands
3.2 Product Application Advantages
Using the same brand of car igniter, comparative tests were conducted on IGBT devices from different manufacturers at room temperature under testing conditions of 25Hz/3.5ms. The experimental results are shown in Figure 5. From the graph, it can be seen that the temperature rise performance of Beiling BLG3040 product is better than that of mainstream manufacturers' products.
Figure 5 Results of Temperature Rise Test for Automotive Ignition Application
3.3 Product Reliability
To ensure that IGBT products meet the working life requirements of automotive grade components, the product has been rigorously certified for reliability in accordance with the AEC-Q101 standard for discrete semiconductor devices in the automotive industry. In addition, relying on end customers, the product has undergone board level reliability verification. BLG3040 has successfully passed the above two types of reliability tests with its stable and reliable product performance
Shanghai Beiling's automotive ignition IGBT products are managed and designed according to the automotive grade component quality concept at every stage from design, development, engineering verification to mass production, and are produced and manufactured based on mature automotive grade wafer production lines and automotive grade packaging production lines with strict control procedures. Shanghai Beiling always adheres to the quality control concept of "zero defects", strictly implements product lifecycle production process monitoring and reliability monitoring, strictly controls product factory inspection standards, continuously explores and optimizes product performance, and provides stable and reliable automotive grade products for automotive customers.
Four new series of products from Shanghai Beiling BLG3040/BLG3040A, with pure domestic chips, automotive grade certification, over one million shipments, have already been shipped in bulk to international GLOBAL customers, and have been recognized by industry-leading customers
Our company provides the most professional selection recommendation, testing and evaluation, technical support, sample response, and cost-effective supply chain services for the 3040 automotive grade series products.
BLQG3040A-D / BLQG3040A-B / BLG3040-D / BLG3040-B
