Overview
The PCA9955BTW-ARD is an evaluation board designed by NXP USA Inc. to facilitate the testing and development of the PCA9955B, a 16-channel FM+ I²C-bus constant-current LED driver. This Arduino Shield is specifically engineered to integrate seamlessly with various Arduino evaluation kits (EVKs), enabling users to evaluate the LED controller's capabilities for color mixing, blinking, and dimming LEDs. The board comes with a graphical user interface that simplifies the exploration of the driver's functions, making it an ideal tool for developers and engineers working on LED-based projects.
Key Specifications
| Specification | Details |
|---|---|
| Silicon Manufacturer | NXP |
| Silicon Core Number | PCA9955B |
| Number of Channels | 16 |
| Output Drive per Channel | 57 mA / 20 V |
| Output Current Accuracy | ±4% channel to channel, ±6% chip to chip |
| Output Current Adjustment | Through resistor at REXT pin |
| I²C Bus Frequency | 1 MHz |
| Supply Voltage | 3V to 5.5V |
| Standby Current | 170 µA |
| Package Type | HTSSOP28 |
| Kit Contents | Assembled and tested evaluation board, Quick Start Guide |
Key Features
- Supports up to four groups of LED gradation control, with each LED channel assigned to one of these groups.
- Programmable gradation time and rate for ramp-up and/or ramp-down operations.
- Programmable hold-on time after ramp-up and hold-off time.
- Programmable brightness current output adjustment.
- Equipped with a graphical user interface for easy control and evaluation.
- Compatible with various NXP evaluation boards, including IMXRT1050 EVK, LPCXpresso55S69, and i.MX 8M Mini LPDDR4 EVK.
- Can be powered either through the Arduino port or an external power connector.
- Includes three RGB LEDs and seven white LEDs for testing purposes.
Applications
The PCA9955BTW-ARD evaluation board is designed for various applications involving LED control, such as:
- LED lighting systems requiring color mixing, blinking, and dimming capabilities.
- Automotive lighting systems where precise LED control is necessary.
- Industrial lighting solutions that need adjustable brightness and color.
- Consumer electronics, such as smart home devices and display panels, that require advanced LED control.
Q & A
- What is the PCA9955BTW-ARD evaluation board used for?
The PCA9955BTW-ARD is used to evaluate and develop applications using the PCA9955B 16-channel FM+ I²C-bus constant-current LED driver. - Which Arduino boards is the PCA9955BTW-ARD compatible with?
The board is compatible with various NXP evaluation kits, including IMXRT1050 EVK, LPCXpresso55S69, and i.MX 8M Mini LPDDR4 EVK. - How many channels does the PCA9955B support?
The PCA9955B supports 16 channels. - What is the output drive per channel of the PCA9955B?
The output drive per channel is 57 mA / 20 V. - How is the output current adjusted?
The output current is adjusted through a resistor at the REXT pin. - What is the supply voltage range for the PCA9955BTW-ARD?
The supply voltage range is 3V to 5.5V. - What is the standby current of the PCA9955BTW-ARD?
The standby current is 170 µA. - Can the PCA9955BTW-ARD be powered externally?
Yes, the board can be powered either through the Arduino port or an external power connector. - What kind of LEDs are included on the board for testing?
The board includes three RGB LEDs and seven white LEDs. - Is there a graphical user interface available for the PCA9955BTW-ARD?
Yes, the board comes with a graphical user interface for easy control and evaluation.
