BD9394EFV-E2

The BD9394EFV-E2 is a LED driver with low power consumption, high reliability, and excellent cost performance ratio. It is widely used in automotive applications requiring LED illumination, including cluster lighting, LCD backlighting, navigation systems, headlights, and signals. The device’s integrated high resolution dimming provides smooth and flicker-free illumination for day and night, and the low off-state current is well suited for illumination in low-power states.

Overview of the BD9394EFV-E2

The BD9394EFV-E2 is a PMIC with an integrated low voltage power supply, simple driving circuit, and an integrated MOSFET. This technology combines low temperature variation characteristics, high temperature stability, low current consumption and high speed switching, making it a suitable choice for car lighting applications. The device also features an under-voltage lockout (UVLO) circuit that prevents the output voltage from dropping below the configured threshold. With a low off-state current consumption of 10 μA, the BD9394EFV-E2 is well-suited for low power applications.

Working Principles of the BD9394EFV-E2

The BD9394EFV-E2 LED driver is a PMIC that works with a single LED or multiple LEDs connected in series, parallel, or a combination. The active region is formed by a PNP bipolar transistor and a NPN transistor, and the output voltage is controlled by an external voltage. When the voltage at the base of the transistor exceeds the set threshold, the transistor will turn “on”. As the voltage increases, the transistor will conduct more current, boosting the LED brightness.

The BD9394EFV-E2 LED driver operates in two main modes: active mode, and sleep mode. In active mode, the LED is illuminated and the LED current is regulated, while in sleep mode, the LED is off and the current is shut off. To toggle between the two modes, a logic level signal is sent to the controller via the Enable pin. A pull-up resistor is used to set the state of the enable pin and will determine whether the LED is illuminated or off.

The BD9394EFV-E2 LED driver uses a high resolution dimming function. This function allows the user to control the brightness of the LED with a single digital control line and a resistive divider connected to an input terminal. The resistive divider adjusts the voltage at the input terminal, which in turn adjusts the LED brightness. The high resolution dimming feature eliminates flickering, which is essential for day and night illumination.

Conclusion

The BD9394EFV-E2 is a PMIC LED driver that is highly reliable, costs effective, and easy to use in automotive applications. It offers excellent performance and low power consumption, making it a good choice for lighting solutions. The device features an integrated high resolution dimming, which provides a smooth and flicker-free illumination and an under-voltage lockout (UVLO) circuit that prevents the output voltage from dropping below the configured threshold. Its exceptional cost performance ratio makes it a popular choice in the market.