Overview
The TLC59108IRGYR is an I2C bus controlled 8-bit LED driver manufactured by Texas Instruments. It is optimized for red/green/blue/amber (RGBA) color mixing and backlight applications. Each LED output features an 8-bit resolution (256 steps) fixed-frequency individual PWM controller, allowing for precise brightness control. The device also supports group brightness and blinking control, making it versatile for various lighting applications.
Key Specifications
| Specification | Value |
|---|---|
| Package | VQFN (20 pins) |
| Operating Temperature Range | -40°C to 85°C |
| Supply Voltage | 3.3 V or 5 V |
| Maximum Output Voltage | 17 V |
| Output Current Range | 10 mA to 120 mA (adjusted through an external resistor) |
| PWM Frequency (Individual) | 97 kHz |
| PWM Frequency (Group) | 190 Hz to 10.73 seconds |
| I2C Bus Interface | 1 MHz Fast Mode Plus, 30 mA high drive capability |
| Hardware Address Pins | Four, allowing up to 14 devices on the same bus |
| Software-Programmable I2C Addresses | Four, including one LED group call address and three LED sub call addresses |
Key Features
- Eight LED drivers with programmable brightness, group dimming, and blinking.
- 256-step (8-bit) linear programmable brightness per LED output and group.
- Individual and group PWM controllers with adjustable duty cycles (0% to 99.6%).
- Software programmable LED group and sub call I2C bus addresses for flexible addressing.
- Open-load/overtemperature detection mode for error detection.
- Constant output current adjustable through an external resistor.
- 25-MHz internal oscillator and noise filter on SCL/SDA inputs.
- Supports hot insertion and active-low reset.
Applications
The TLC59108IRGYR is suitable for various lighting applications, including RGBA color mixing, backlighting, and general LED lighting control. It is particularly useful in scenarios where precise brightness control and group addressing are required, such as in display backlighting, LED strips, and other lighting systems.
Q & A
- What is the primary function of the TLC59108IRGYR? The TLC59108IRGYR is an I2C bus controlled 8-bit LED driver optimized for RGBA color mixing and backlight applications.
- How many LED drivers does the TLC59108IRGYR have? The device has eight LED drivers.
- What is the resolution of the PWM controllers? Each LED output has a 256-step (8-bit) resolution PWM controller.
- What are the adjustable frequency ranges for the group PWM controller? The group PWM controller frequency is adjustable from 24 Hz to once every 10.73 seconds.
- How many hardware address pins does the TLC59108IRGYR have? The device has four hardware address pins, allowing up to 14 devices on the same I2C bus.
- What is the maximum output voltage of the TLC59108IRGYR? The maximum output voltage is 17 V.
- Can the output current be adjusted? Yes, the output current can be adjusted through an external resistor from 10 mA to 120 mA.
- Does the TLC59108IRGYR support hot insertion? Yes, it supports hot insertion.
- What is the purpose of the software reset feature? The software reset feature allows the device to be reset through the I2C bus.
- What kind of error detection does the TLC59108IRGYR have? The device features open-load/overtemperature detection mode to detect individual LED errors.
