In the urban commuting and short-distance travel scenarios, electric bicycles stand out with their unique advantages. They use electricity as a power source, are green and environmentally friendly, and are in line with the current concept of sustainable development. The operation is simple and easy to use, and both young and middle-aged people can easily control it; the body is small and flexible, and it can freely shuttle through congested streets and narrow alleys and quickly reach the destination. Moreover, parking is convenient, and there is no need to worry about finding a parking space. Compared with traditional bicycles, electric power assistance makes riding less laborious, greatly improving travel efficiency and comfort.

 1. MOSFET Application in Electric Bicycle

Electric bicycles are composed of batteries, motors, controllers and chargers. The battery supplies power, the motor drives, the controller regulates the motor, and the charger charges the battery. VBL1105 and VBL1602 are distributed in the controller and charger to accurately control current and efficiently convert electricity.

 1. Motor drive

Precise speed regulation : MOSFET is used as a switching element to convert the battery DC power into a PWM signal, and the motor speed is precisely controlled by changing the duty cycle. The 100V VDS, ±20V VGS and 3V Vth of VBL1105 can adapt to complex voltages and respond accurately.

Excellent performance : Their low on-resistance is obvious, VBL1105 is 4mΩ at VGS = 10V, and VBL1602 is as low as 3mΩ at VGS = 10V. Reduced heat generation under high loads ensures power output. Fast switching speeds allow more precise control and reduce jitter and noise. The 270A rated drain current of the VBL1602 ensures smooth heavy-load startup and acceleration.

2. Battery Management

Charging intelligence : In chargers, they adjust the charging current as needed to avoid overcharging. For example, the VBL1105 can control charging based on the battery status and reduce the current when overheating.

Reliable protection : In case of short circuit, overload and other abnormalities, VBL1105 and VBL1602 can quickly cut off the circuit. For example, when the motor is blocked, VBL1602 can respond quickly to protect the battery and components.

 3. Energy recovery

Principle implementation : When braking or going downhill, the motor generates electricity, and the two rectify the AC power into DC power and feed it back to the battery. Reasonable control of the on and off time optimizes the recovery efficiency.

The effect is significant : it can improve energy utilization and increase the cruising range by 10% - 15% under frequent braking and downhill conditions.

 2. Product Advantages

High efficiency and energy saving : Trench technology is used to reduce on-resistance, reduce self-loss, improve system efficiency, extend battery life and enhance stability.

Fast response : Fast switching speed enables high PWM signal frequency, precise control and reduced switching losses.

Stable and reliable : The 100V VDS of VBL1105 and the 60V VDS of VBL1602 make them high voltage resistant and anti-interference, adapting to complex riding environments.

Strong adaptability : TO263 package saves space and meets the miniaturization requirements of electric bicycles.

3. Future Development Outlook

Electric mobility is developing rapidly, and the wave of intelligence is sweeping the field of electric bicycles. Our VBL1105 and VBL1602 MOSFETs have excellent performance and reliable quality, and are the key to promoting technological innovation. In the future, they will work with sensors and controllers to intelligently control current and optimize electrical systems based on sensor data. They can also reduce energy consumption, improve battery life with energy recovery, increase power with fast switching and high current, and operate stably with high voltage resistance and anti-interference, bringing users a better green travel experience and helping the industry reach new heights.