BD6066EKN-E2

BD6066EKN-E2 is a PMIC - LED driver developed by ROHM Semiconductor. It is designed to drive high power LED applications such as LCD backlight, automotive lighting, and display lighting.

The BD6066EKN-E2 is a 6-channel (single channel) constant-current output linear regulator designed for high power applications. It can drive up to 6 strings of LEDs with a constant output current of up to 600mA per string. The current sink accuracy is regulated to ±5%, and temperature protection is provided to the internal power switch by the built-in temperature sensors.

The BD6066EKN-E2 features a current monitor output pin with three additional power switches and over-temperature protection. The device is able to operate in PWM current mode and auto dim mode to achieve flicker-free and power save capabilities. The internal Zener diode reduces the power loss and improves the efficiency while the built-in ripple current sensor helps to accurately monitor the current status and optimize power efficiency.

Part of the BD6066EKN-E2’s application field is the LCD backlight, where the device is capable of providing a constant current up to 600mA for each string of LEDs at a wide temperature range from -40°C to +105°C and an input voltage range from 6V to 32V. This makes the device suitable for automotive applications such as automotive lighting and display lighting.

The working principle of the BD6066EKN-E2 is based on the NPN bipolar transistor as the drive source, which provides the current feedback loop in order to control the output voltage. The device is equipped with an internal voltage reference to provide precise current regulation, and a power control switch which is implemented in the control loop to provide protection against overvoltage, overcurrent and over-temperature.

The BD6066EKN-E2 combines the functions of a current monitor, APS control to limit or decrease the output current, dimming control and ESD protection into onechip for improved system performance. Additionally, the device integrates slew rate control and soft-start function to minimize output overshoot and inrush current.

In summary, the BD6066EKN-E2 is an efficient and reliable PMIC - LED driver device, suitable for devices that require a constant output current up to 600mA and a wide temperature range. The device is equipped with a variety of Protection features to ensure safe operation and excellent performance in high power LED applications.