Overview
The PCA9955TW,118 is a 16-channel Fast-mode Plus (Fm+) I2C-bus controlled constant current LED driver produced by NXP USA Inc. This device is optimized for dimming and blinking LEDs, particularly suitable for Red/Green/Blue/Amber (RGBA) LEDs in various applications. It operates with a supply voltage range of 3 V to 5.5 V and supports LED supply voltages up to 40 V. The PCA9955TW,118 is known for its high precision and versatility in LED control, making it a robust solution for lighting systems.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 16 |
| Supply Voltage Range | 3 V to 5.5 V |
| LED Supply Voltage | Up to 40 V |
| Output Peak Current | Adjustable from 225 μA to 57 mA |
| I2C-bus Interface | Fast-mode Plus (Fm+), up to 1 MHz |
| PWM Frequency for Brightness Control | 31.25 kHz per LED, 122 Hz for group dimming |
| Blinking Frequency | Programmable from 15 Hz to 16.8 s |
| Package Type | HTSSOP28 |
| Environmental Compliance | PbFree, EU RoHS, Halogen Free, REACH SVHC compliant |
Key Features
- 256-step (8-bit) linear programmable brightness per LED output and group brightness control.
- 256-step group blinking with programmable frequency and duty cycle.
- Output state change programmable on the Acknowledge or the STOP Command.
- Four hardware address pins allowing up to 16 devices to be connected to the same I2C-bus.
- Software programmable I2C-bus addresses for group addressing.
- Built-in open, short load, and overtemperature detection circuitry.
- Thermal shutdown feature for device protection.
- No glitch on LED on power-up and low standby current.
- Internal power-on reset and noise filter on SDA/SCL inputs.
Applications
The PCA9955TW,118 is suitable for a variety of applications, including amusement products, automotive lighting, display backlighting, and general lighting systems that require precise and flexible LED control. It is particularly useful in scenarios where multiple LEDs need to be dimmed or blinked in a coordinated manner.
Q & A
- What is the PCA9955TW,118 used for? The PCA9955TW,118 is used as a 16-channel constant current LED driver for dimming and blinking LEDs.
- What is the supply voltage range of the PCA9955TW,118? The supply voltage range is from 3 V to 5.5 V.
- What is the maximum LED supply voltage supported by the PCA9955TW,118? The maximum LED supply voltage is up to 40 V.
- How many channels does the PCA9955TW,118 have? The PCA9955TW,118 has 16 channels.
- What type of I2C-bus interface does the PCA9955TW,118 use? It uses a Fast-mode Plus (Fm+) I2C-bus interface.
- What are the key features of the PCA9955TW,118's brightness and blinking control? It offers 256-step linear programmable brightness per LED and group brightness control, as well as programmable blinking frequency and duty cycle.
- Does the PCA9955TW,118 have built-in protection features? Yes, it has built-in open, short load, and overtemperature detection circuitry, along with thermal shutdown protection.
- How many hardware address pins does the PCA9955TW,118 have? It has four hardware address pins.
- Is the PCA9955TW,118 environmentally compliant? Yes, it is PbFree, EU RoHS, Halogen Free, and REACH SVHC compliant.
- What package type is the PCA9955TW,118 available in? It is available in the HTSSOP28 package type.
