BP5843A

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BP5843A is a high-precision current sink LED driver designed for RGB LED application. It is a PMIC (Power Management IC) - LED Drivers. It has the advantage of wide input voltage range, high stability and low ripple, making it ideal for LED lighting application.

BP5843A comes with four independent channels with current setting resistors, providing constant current sink of up to 80mA per channel. It supports LED driving current of up to 25mA through external resistors.

The device supports wide input voltage range from 2.7V to 15.7V, and it can drive up to 4 LEDs per channel with a maximum output of 80mA. It has a quiescent current of only 1µA and no additional components are required for the LED driver.

BP5843A has advanced protection techniques including over-voltage protection, overtemperature protection and short circuit protection. It features a low-noise PWM control for adjustable LED brightness and dimming in LED lighting applications. It also features a soft-start function to reduce the inrush current when powering up the device.

BP5843A works on the principle of constant current source. When the voltage at the input terminals of the LED driver is applied, it produces a constant current in the output terminals. The device operates by regulating the current so that the device remains in the linear region, which results in a constant current at the output. This constant current is used to drive the LEDs. The PWM signal is used to control the brightness of the LEDs. This signal is fed to the switching transistors, which regulates the current into the LEDs. The duty cycle of the PWM signal determines the brightness of the LEDs.

BP5843A is suitable for applications such as residential and commercial lighting, automotive ambient lighting, decorative lighting, and architectural lighting. It can also be used in consumer electronics products such as mobile phones, tablets, notebook PCs and LCD TVs.

The device comes in a 6-pin SOP (Small Outline Package) which is lead free and RoHS compliant. It has a wide operating temperature range of –40°C to +125°C and comes with an integrated access resistor between VCC and VSS. The device is suitable for high-dense surface-mount assembly and automated optical inspection.

BP5843A is a flexible and reliable device for LED lighting applications. Its wide input voltage range and low pin-count makes it ideal for embedded systems. Its advanced protection techniques provide the added safety of reliable lighting applications and it supports adjustable LED brightness with low electromagnetic interference.

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