PCA9633BS,118

The PCA9633BS,118 is a LED driver typically used for ambient or backlighting applications. It is a pulse width modulation dimmable LED driver capable of both driving and dimming high efficacy LEDs, based on a proprietary IP product from NXP Semiconductors. In a backlighting application, the PCA9633 has the capability to drive multiple LEDs from a single integrated circuit (16 individual outputs), which makes it uniquely suited in small form factor applications. In a typical application, the PCA9633BS,118 is capable of driving up to 16 individual high-output LEDs in series.

The PCA9633BS,118 utilizes a pulse-width-modulation (PWM) dimming technology, which is the most effective and efficient method for controlling brightness in LED applications. It is able to deliver up to 64 discrete levels of brightness without presenting flicker or perceptible steps. Additionally, the PCA9633BS,118 has the ability to drive low cost and high brightness LEDs with three different pulse width modulation techniques, i.e., Dual Edge Modulation (DEM), Constant Off Time (COT) and Constant Current (CC).

The device consists of a constant-current sink with a complementary PNP/NPN output transistor configuration. The constant-current sink is composed of a power field effect transistor (FET) for setting and maintaining the LED current, a bandgap voltage reference and a resistive divider for setting the LED current. This circuit is connected to each LED output through the corresponding output FET. The output transistor is realized in CMOS technology and has a common gate control input.

The PCA9633BS,118 is a dynamic LED driver, which is ideal for applications where the LED currents need to change frequently. With its advanced dynamic LED-driving technique, the device is able to support AC input applications and allows a wide range of brightness and dimming levels without any significant loss in efficiency. In a typical application, the PCA9633BS,118 is connected to an AC voltage source, via input capacitors, and a load such as a LCD backlight.

The PCA9633BS,118 LED driver can be used for a variety of applications such as LCD backlight, ambient lighting, and LED lighting for both indoor and outdoor applications. It also has the capability to work with dimmers and triac/phase-cut dimmers, making it a suitable choice for dimming purposes. Moreover, since the device can support different modulation techniques, the user can adjust the output range and fine-tune the LED current easily, making it suitable for various applications.

In summary, the PCA9633BS,118 is a pulse width modulation dimmable LED driver, which is ideal for ambient or backlighting applications. It is capable of driving and dimming a wide range of LEDs and can support different modulation techniques. Additionally, it can operate with AC input sources, making it suitable for dimming purposes. Overall, the PCA9633BS,118 is a dependable and efficient LED driver.