NJU7261U30

NJU7261U30 Application Field and Working Principle

NJU7261U30 is a hybrid system-in-package DC-DC driver IC specifically designed for driving LEDs in LCD/LED panels and backlight applications. It integrates a voltage-mode controller, low-side power MOSFET, high-side power MOSFET, and high-side discharge circuitry. NJU7261U30 is featured with a sub-1V PWM unit, low start-up current, high accuracy for reference voltage, and wide range of voltage gain for different LED requirements.

Applications of NJU7261U30

• Notebook and LCD monitor backlight applications
• Cell phone LCD/LED backlight applications
• General LED backlight applications

Working Principle

NJU7261U30 utilizes two power MOSFETs in a synchronous configuration to manage the output stage. The low-side MOSFET is used to switch the current sourced by the external low-side device. The high-side MOSFET, which is used to control the current to match the programmed PWM signal, is comprised of an on-chip power MOSFET and an external charge pump.

The switching frequency of NJU7261U30 can be configured by an external resistor, and a wide range of LED dimming range can be set by the external voltage gain circuit. It also supports a low-power start-up mode, which reduces the start-up current and extends the battery life.

Conclusion

NJU7261U30 is a DC-DC driver IC designed for driving LEDs in LCD/LED panels and backlight applications. It features a sub-1V PWM unit, low start-up current, high accuracy for reference voltage, and wide range of voltage gain for different LED requirements. With its excellent capabilities and performance, NJU7261U30 can help reduce development costs, enhance product reliability, and increase the efficiency of the designs.