Overview
The TLC59711PWPR from Texas Instruments is a 12-channel, constant-current sink LED driver with enhanced spectrum PWM capabilities. This integrated circuit is designed for driving RGB LED clusters and offers a high degree of control over brightness and color. It features a 3.3-V linear regulator and a watchdog timer, making it suitable for a variety of LED display applications. The device supports grayscale (GS) control with 16-bit (65536 steps) adjustable currents and global brightness control (BC) with 7-bit (128 steps) for each color group.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 12 | |
| Current Capability per Channel | 60 mA | |
| Grayscale (GS) Steps | 16-bit (65536 steps) | |
| Global Brightness Control (BC) Steps | 7-bit (128 steps) | |
| Power-Supply Voltage Range | 4.0 V to 17 V (internal regulator), 3.0 V to 5.5 V (direct supply) | V |
| LED Supply Voltage | Up to 17 V | V |
| Constant-Current Accuracy | ±1% (typ), ±3% (max) channel-to-channel; ±1% (typ), ±4% (max) device-to-device | % |
| Data Transfer Rate | 10 MHz (cascading) | |
| Linear Voltage Regulator Output | 3.3 V | V |
| Operating Temperature Range | –40°C to +85°C | °C |
Key Features
- 12 constant-current sink output channels with individually adjustable currents.
- Grayscale (GS) control with 16-bit (65536 steps) and global brightness control (BC) with 7-bit (128 steps) for each color group.
- Internal 3.3-V linear regulator.
- Auto display repeat function and display timing reset function.
- Internal/external selectable GS clock.
- Thermal shutdown (TSD) with auto restart.
- Unlimited device cascading.
- Watchdog timer for external clock failure.
Applications
The TLC59711PWPR is primarily used in RGB LED cluster lamp displays, signage, and other applications requiring precise control over LED brightness and color. It is also suitable for use in automotive, industrial, and consumer electronics where high-quality LED displays are needed.
Q & A
- What is the number of channels supported by the TLC59711PWPR? The TLC59711PWPR supports 12 constant-current sink output channels.
- What is the current capability per channel? Each channel can handle up to 60 mA of current.
- What is the grayscale (GS) control resolution? The GS control has a resolution of 16-bit (65536 steps).
- How is the global brightness control (BC) implemented? The BC function is implemented with 7-bit (128 steps) for each color group.
- What is the power-supply voltage range for the TLC59711PWPR? The device can operate with a power-supply voltage range of 4.0 V to 17 V using the internal regulator, or 3.0 V to 5.5 V with a direct supply.
- What is the maximum LED supply voltage? The maximum LED supply voltage is up to 17 V.
- What is the constant-current accuracy of the TLC59711PWPR? The constant-current accuracy is ±1% (typ), ±3% (max) channel-to-channel and ±1% (typ), ±4% (max) device-to-device.
- What is the data transfer rate for cascading devices? The data transfer rate is 10 MHz for cascading devices.
- Does the TLC59711PWPR have a built-in linear voltage regulator? Yes, it has a built-in 3.3-V linear voltage regulator.
- What is the operating temperature range of the TLC59711PWPR? The operating temperature range is –40°C to +85°C.
