Overview
The TLC5924DAPR is a 16-channel constant-current sink driver produced by Texas Instruments. This device is designed to drive LEDs with high precision and reliability. Each channel of the TLC5924DAPR has an On/Off state and a 128-step adjustable constant current sink, known as dot correction, which helps adjust the brightness variations between LEDs and other LED drivers. The device features a serial data interface for controlling the On/Off state and dot correction of each channel. A single external resistor sets the maximum current for all 16 channels, and the device includes pre-charge FETs to improve image quality in dynamic-drive LED displays.
Key Specifications
| Parameter | Value |
|---|---|
| Package | HTSSOP (DAP) with 32 pins |
| Operating Temperature Range | -40°C to 85°C |
| Drive Capability | 0 to 80 mA (Constant-Current Sink) |
| Constant Current Accuracy | ±1% (typical) |
| Serial Data Interface | 30 MHz Data Transfer Rate |
| VCC | 3.0 V to 5.5 V |
| LED Supply Voltage | Up to 17 V |
| Switching Time | Tr / Tf = 10ns (typical) |
| Input/Output Level | CMOS Level |
Key Features
- 16 independent channels with On/Off state and 128-step adjustable constant current sink (dot correction)
- Serial data interface for controlling On/Off state and dot correction
- Pre-charge FETs for improving image quality in dynamic-drive LED displays
- Controlled In-Rush Current to reduce power supply bypass capacitor requirements
- LED Open Detection (LOD) and Thermal Error Flag (TEF) for error monitoring
- Flexible serial interface with 30 MHz data transfer rate
- CMOS level input/output compatibility
- Fast switching output with Tr / Tf = 10ns (typical)
Applications
- Monocolor, Multicolor, Fullcolor LED Displays
- Monocolor, Multicolor LED Signboards
- Display Backlighting
- Multicolor LED Lighting Applications
Q & A
- What is the TLC5924DAPR?
The TLC5924DAPR is a 16-channel constant-current sink driver designed for driving LEDs with high precision and reliability.
- What is the operating temperature range of the TLC5924DAPR?
The operating temperature range is -40°C to 85°C.
- What is the maximum current per channel for the TLC5924DAPR?
The maximum current per channel is 0 to 80 mA (Constant-Current Sink).
- How is the dot correction feature implemented in the TLC5924DAPR?
The dot correction is implemented through a 7-bit (128 steps) adjustable constant current sink for each channel, accessible via a serial data interface.
- What error detection features does the TLC5924DAPR have?
The device features LED Open Detection (LOD) and Thermal Error Flag (TEF) for monitoring broken or disconnected LEDs and over-temperature conditions.
- How does the pre-charge FET improve image quality in the TLC5924DAPR?
The pre-charge FETs improve image quality by reducing inrush currents and ensuring that the LEDs turn on and off smoothly, enhancing the overall display quality.
- What is the data transfer rate of the serial interface in the TLC5924DAPR?
The data transfer rate of the serial interface is 30 MHz.
- What type of input/output levels does the TLC5924DAPR support?
The device supports CMOS level input/output.
- How can multiple TLC5924DAPR devices be cascaded?
Multiple devices can be cascaded by connecting the SOUT pin of one device with the SIN pin of the following device.
- What is the purpose of the BLANK signal in the TLC5924DAPR?
The BLANK signal controls the On/Off state of all output channels; when BLANK is high, all outputs are forced to the VUP level, and when BLANK is low, the outputs are controlled by the input data.
