Overview
The TLC5922DAPRG4, produced by Texas Instruments, is a 16-channel constant-current sink LED driver. This device is designed for various LED lighting applications, including monocolor and multicolor LED signboards, display backlighting, and multicolor LED lighting. It features a serial data interface compatible with SPI, allowing for efficient data transfer at a rate of up to 30 MHz. The driver supports CMOS level input/output and operates within a voltage range of 3.0 V to 5.5 V, making it versatile for different system designs.
Key Specifications
| Parameter | Value |
|---|---|
| Number of Channels | 16 |
| Constant Current Sink | 0 to 80 mA |
| Constant Current Accuracy | ±1% (typical) |
| Data Transfer Rate | Up to 30 MHz |
| Operating Voltage (VCC) | 3.0 V to 5.5 V |
| LED Supply Voltage | Up to 17 V |
| Operating Temperature | –20°C to 85 °C |
| Package Type | 32-pin HTSSOP (PowerPAD™) |
| Dot Correction | 7-bit (128 steps), individually adjustable for each channel |
| Switching Time (Tr/Tf) | 10 ns (typical) |
| Delay Between Outputs | 20 ns (typical) graduated delay |
Key Features
- CMOS level input/output for compatibility with a wide range of systems.
- Serial data interface compatible with SPI for high-speed data transfer.
- 128-step adjustable constant-current sink for each channel, allowing for precise brightness control.
- Dot correction to adjust brightness variations between LED channels.
- Fast switching output with typical rise and fall times of 10 ns.
- Graduated delay circuits between outputs to prevent large inrush currents.
- A single external resistor sets the maximum current for all 16 channels.
- Output enable feature to switch all channels on or off with a single signal.
Applications
- Monocolor and multicolor LED signboards.
- Display backlighting.
- Multicolor LED lighting applications.
- General LED lighting systems requiring precise current control and high-speed data transfer.
Q & A
- What is the maximum number of channels supported by the TLC5922DAPRG4?
The TLC5922DAPRG4 supports 16 channels. - What is the range of constant current sink for each channel?
The constant current sink ranges from 0 to 80 mA. - What is the data transfer rate of the TLC5922DAPRG4?
The data transfer rate is up to 30 MHz. - What is the operating voltage range for the TLC5922DAPRG4?
The operating voltage range is 3.0 V to 5.5 V. - How is the maximum current for all channels set?
A single external resistor sets the maximum current for all 16 channels. - What is the purpose of the dot correction feature?
The dot correction feature adjusts brightness variations between LED channels. - What is the typical switching time (Tr/Tf) of the TLC5922DAPRG4?
The typical switching time is 10 ns. - How does the TLC5922DAPRG4 prevent large inrush currents?
The device has graduated delay circuits between outputs to prevent large inrush currents. - What is the package type of the TLC5922DAPRG4?
The package type is 32-pin HTSSOP (PowerPAD™). - Can all channels be switched on or off with a single signal?
Yes, all channels can be switched on or off using the BLANK signal.
