The selection of DC brushless motor chips should take into account multiple factors such as performance, application requirements and cost. In the market, products such as BridgeSwitch 2 from Power Integrations and CST6118 from ChipSourceTek are all high-quality DC brushless motor driver chips.

    Dc brushless motors (BLDC) are widely used in various devices due to their high efficiency, long service life and low maintenance requirements. Selecting the appropriate driver chip is crucial to the performance and stability of the motor. So, what kind of chip is good for DC brushless motors?

Ⅰ、Chip performance index

    When choosing a DC brushless motor chip, the first thing to consider is the performance indicators of the chip. These indicators include the maximum continuous output current, peak current, operating voltage range, etc. For instance, the CST6118 chip from ChipSourceTek has a maximum continuous output current of up to 1.8A, a peak current of up to 2.5A, and an operating voltage range of 1.5V to 8V, making it suitable for a variety of application scenarios.

Ⅱ、Application Requirements

    In addition to performance indicators, it is also necessary to select chips based on specific application requirements. For instance, if the motor needs to frequently perform forward and reverse rotation or braking operations, then a chip with these functions should be selected. The CST6118 from ChipSourceTek is equipped with forward, backward, stop and braking functions, making it highly suitable for such applications.

Ⅲ、Recommendations for high-quality chips in the market

    1. Power Integrations' BridgeSwitch-2: This is a high-voltage integrated half-bridge (IHB) motor driver IC, suitable for applications with power up to 300V or even higher. It integrates the drive of the upper and lower tubes as well as two performance-enhanced FREDFETs internally, which can provide an inverter efficiency of up to 99%. In addition, it also provides phase current detection function, which can mirror and detect the motor current flowing through the lower tube FREDFET.

    2. ChipSourceTek's CST6118: This is a high-performance single-channel brushless DC motor driver chip, featuring extremely low quiescent current and low on-resistance, which can save peripheral filter circuits and reduce costs. Meanwhile, it also has a thermal protection function to ensure the safety of chip operation.

Ⅳ、Conclusion

    Selecting the appropriate DC brushless motor chip requires a comprehensive consideration of multiple factors such as performance, application requirements and cost. There are several high-quality driver chips available on the market to choose from, such as BridgeSwitch-2 from Power Integrations and CST6118 from ChipSourceTek, etc. These chips feature high performance, multi-functionality and security, and can meet the demands of various application scenarios.