On October 16, 2025, Dalian University Holdings, a leading international semiconductor component distributor dedicated to the Asia Pacific market, announced that its subsidiary, Shiping, has launched an automotive intelligent LED light group evaluation board solution based on the onsemi NCV78514 LED Driver.

Figure 1- Display board diagram of the evaluation board scheme for automotive intelligent LED light groups based on onsemi products by Da Da Da Da Shi Ping

The intelligent LED light group is gradually becoming a core element in the intelligent transformation of automobiles, and its development is driven by the joint demand for intelligence, personalization, and high reliability. Currently, with the widespread application of technologies such as adaptive headlights, pixelated taillights, and intelligent ambient lights, not only has driving safety and interactive experience been significantly improved, but also higher requirements have been put forward for core driving technologies.

The automotive intelligent LED light group evaluation board solution launched by Da Da Da Da Da Shi Ping based on the Anson Mei NCV78514 LED Driver aims to comprehensively demonstrate the excellent functions of NCV78514. The chip adopts an H-bridge topology structure and highly integrated design, which effectively addresses industry challenges such as thermal management, EMI interference, and cost control while improving system power density and reliability, helping the new generation of car lighting systems continue to evolve towards higher efficiency and intelligence.

Figure 2- Scene application diagram of the evaluation board scheme for automotive intelligent LED light groups based on onsemi products by Dalian University Shiping

NCV78514 is an automotive grade LED driver launched by onsemi, which adopts an H-bridge topology structure and integrates synchronous buck and external asynchronous boost functions. Its topology supports the use of a single driver to control multiple LED loads, with a maximum output power of 20W and voltage and current of up to 60V and 1.5A respectively. This device is very suitable for MCU free application scenarios and is equipped with multiple intelligent functions, including input voltage and temperature derating, diagnosis and error handling, and attenuation control.

Figure 3- Block diagram of the evaluation board scheme for automotive intelligent LED light groups based on onsemi products by Dalian University Shiping

This evaluation board is used to demonstrate the various functions of NCV78514. The input terminal is designed with a reverse polarity protection circuit and connected to an input PI type filter. The current flows through the DC/DC converter and the output PI filter in sequence. The output current value is set through a resistor connected to the ISET pin. The connection status and operation of the resistor are continuously monitored through NCV78514 to ensure reliable electrical connection and stable resistance during operation. During the startup phase, the system will evaluate the resistor and calculate the corresponding output current based on it.

Not only that, the output current can also be adjusted by applying a PWM signal to the DIM pin. NCV78514 can detect the input PWM signal and measure its duty cycle. The output current will then undergo ten pulse width modulations at a frequency of 400Hz, ultimately achieving a current output consistent with the duty cycle of the PWM signal. In addition, NCV78514 can set the output current through a resistor and accurately detect the temperature of the LED module using a thermistor to avoid overheating of the circuit and LED light string.

NCV78514 has rich functions and can operate independently in MCU free environments. It supports a wide input voltage range of 5V to 20V, with an output voltage of up to 60V and a load drop tolerance of 45V. This device adopts a fixed switching frequency of 400kHz, programmable output current (200mA – 1500mA), and built-in spread spectrum mechanism. It also has 9V hot start management and LED temperature detection interface (compatible with external NTC/PTC), providing a complete state and error handling mechanism. NCV78514 complies with AEC-Q100 standards, supports PPAP, and is suitable for fog lights, turn signal assist lights, sign projection, and other automotive lighting scenarios.

Core technological advantages:

NCV78514 features:

Support applications that do not require MCU;

Integrate the reduction mechanism;

Fixed switching frequency of 400kHz;

Input working range: 5V to 21V;

Hot start management below 9V;

Can withstand sudden drops in load up to 45V;

Output voltage range up to 60V;

External programmable current ranging from 200mA to 1500mA;

Pulse width modulation: 80Hz to 600Hz;

LED current dimming frequency 400Hz;

External NTC/PTC for LED temperature measurement;

Spread spectrum;

Handling of status and error modes;

Compliant with AEC-Q100 certification and supports PPAP.

Scheme specifications:

Functions of NCV78514 EVK:

The input end is protected against reverse polarity;

Input PI type filter;

DC/DC converter;

Output PI type filter;

Vout=+12V, Iout_max=1A (adjustable);

LED current dimming frequency 400Hz.

About The Author

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry

They are committed to providing customers around the world with the most necessary, outdated, licensed, and hard-to-find parts.

Media Relations

Name: John Chen

Email: salesdept@topcomponents.ru

This is reported by Top Components, a leading supplier of electronic components in the semiconductor industry. They are committed to p with the most necessary, outdated, licensed, and hard-to-find parts.

Media Relations Name: John Chen

Email: salesdept@topcomponents.ru