With the rapid development of the electric vehicle industry, the demand for high-performance power management chips is growing steadily. Xinbule's newly launched DC-DC step-down chip XBL9501/02/03 series has become an ideal choice for electric vehicle controllers, on-board equipment and self-balancing scooter power supplies thanks to its high efficiency, integration, high voltage resistance, high current resistance and high reliability. This article takes XBL9501 as an example to focus on the applications and advantages of these three new products in electric vehicle controllers, on-board equipment and self-balancing scooter power supplies.

I.XBL9501 Chip Overview

XBL9501 is a high-efficiency step-down DC-DC converter with a wide input voltage range of 4.5V to 100V and an adjustable output voltage range of 1.23V to 90V. It features a maximum switching current of up to 5A, a fixed switching frequency of 380kHz, and a built-in power MOSFET, with a conversion efficiency of up to 90%. In addition, the chip is also available in fixed 3.3V, 5V and 12V output versions to meet customers' diverse and customized needs.

As an environmentally friendly and energy-efficient means of transportation, electric vehicles have been widely used worldwide in recent years. With continuous technological advancement, the performance and functions of electric vehicles have been constantly improved, placing higher requirements on related core components. The launch of Xinbule XBL9501 chip is precisely to meet the core demand for high-performance power management chips in fields such as electric vehicle controllers, on-board equipment and self-balancing scooter power supplies.

II.Application Advantages of XBL9501 Chip in Electric Vehicle-related Equipment

(I) Electric Vehicle Controller

1. Efficient Power Management

In electric vehicle controllers, the XBL9501 chip can provide a stable power supply for subsequent circuits (such as MCUs, LEDs, etc.), ensuring their efficient operation. Its high efficiency and 5A maximum output capability help improve the power output and cruising range of electric vehicles.

2. Simplified Circuit Design

XBL9501's highly integrated design reduces the number and size of power management components in the controller. It operates normally with only very few peripheral components, thus simplifying the system structure and improving production efficiency and reliability.

3. Enhanced System Stability

Built-in multiple protection functions (such as overcurrent protection, thermal protection) ensure the stable operation of electric vehicle controllers under various operating conditions, improving the safety and reliability of vehicles and preventing chip damage in harsh environments.

4. Adaptable to Multiple Power Inputs

The chip supports a wide input voltage range of 4.5V~100V, adapting to battery packs of different voltages. It effectively prevents system damage caused by voltage fluctuations, enhancing the versatility and flexibility of electric vehicle controllers.

5. Reduced Product Cost

The wide voltage input design reduces the need for additional hardware such as voltage converters or regulators, thereby saving hardware design and production costs.

(II) Electric Vehicle On-board Equipment

1. Stable Power Supply

Electric vehicle on-board equipment (such as in-vehicle infotainment systems, intelligent driving assistance devices, etc.) have high requirements for power stability and reliability. The XBL9501 chip provides a stable power output for these devices, ensuring their normal operation under various operating conditions. Its quiescent current of 1μA maximizes power retention.

2. High Dynamic Response

XBL9501 features excellent line and load regulation, meeting the demand for no voltage drop when switching from light load to heavy load. It is particularly suitable for on-board locators requiring instantaneous high-current networking, low ripple and high dynamic response. The wide voltage input design adapts more easily to new power demands during equipment upgrades or expansion, improving equipment scalability.

3. Simple Peripheral Circuit

XBL9501 has a simple peripheral circuit design, enabling miniaturized PCB layout. It integrates thermal protection, output short-circuit protection and other functions, improving equipment reliability and stability.

4. Lower System Temperature

With its 90% high-efficiency power conversion, the XBL9501 chip reduces heat generation during operation, lowering the temperature of the entire controller and reducing faults and safety risks caused by high temperatures.

(III) Self-balancing Scooter Power Supply

1. Efficient Power Management

The self-balancing scooter power supply needs to provide a stable power supply for subsequent circuits to ensure smooth operation of the scooter. The XBL9501 chip's high efficiency and high current output of up to 5A meet the power demands of self-balancing scooters, improving power efficiency and extending the scooter's battery life.

2. Miniaturization and Lightweight

Self-balancing scooters have high requirements for power supply size and weight. The XBL9501 chip's highly integrated design and compact TO263-5/TO220-5 package reduce the size and weight of the power supply, making the scooter more portable and flexible.

3. Multiple Protection Functions

Self-balancing scooters may encounter various complex conditions during use, such as overload and short circuit. The multiple built-in protection functions of the XBL9501 chip ensure safe power supply operation under such circumstances, improving the scooter's reliability and safety.

4. Optimized Battery Life

XBL9501's 92% high conversion efficiency effectively reduces energy loss and avoids excessive battery heating during charging and discharging, thus extending battery life.

6. Improved Equipment Response Speed

5A high-current power supply responds quickly to load changes, ensuring stable operation of equipment under high loads and improving equipment response speed.

III.Typical Circuit Diagram

XBL9501 typical circuit diagram mainly realizes high-efficiency step-down conversion from an input voltage of 8V-100V to an output voltage of 5V. The circuit mainly consists of input filter capacitors, XBL9501 chip, inductor, Schottky diode, output filter capacitors and feedback resistors. A 100μF aluminum electrolytic capacitor is recommended for input capacitor CIN, and a 220μF aluminum electrolytic capacitor for output capacitor COUT. A toroidal inductor with an inductance of 10μH and a rated current higher than 5A is suggested. The chip works by controlling the turn-on and turn-off of the switching transistor to regulate inductor current and achieve step-down function. The output voltage is set by voltage division of feedback resistors, with the formula VOUT=1.230×(1+R2/R1). For a 5V output, R1=33KΩ and R2=100KΩ can be used to obtain Vout=5V as calculated by the formula.

IV.Market Prospect of XBL9501 Chip

XBL9501 chip is an ideal choice for power management in electric vehicle-related equipment thanks to its high efficiency, high integration and multiple protection functions. Its applications in electric vehicle controllers, on-board equipment and self-balancing scooter power supplies not only improve equipment performance and reliability but also deliver a better user experience. With the continuous development of the electric vehicle industry, the XBL9501 chip enjoys broad market prospects, and its technological innovation and application expansion will provide stronger support for industry development.