Overview
The TLC59116IPWR is a 16-channel constant current LED driver from Texas Instruments . It is controlled via an I²C interface and supports independent PWM dimming and grouped brightness control .
This device is designed for applications such as LED lighting control, backlight systems, RGB lighting effects, and indicator arrays . It can achieve high-precision brightness adjustment while reducing the burden on the MCU.
The TLC59116 integrates a constant current source, oscillator, and PWM control logic , enabling multi-channel LED control without the need for additional complex circuitry, making it ideal for intelligent lighting and human-machine interface systems.
Core parameters
| Parameter Items | Specification |
| Number of output channels | 16 channels |
| Interface type | I²C (up to 1MHz) |
| Output type | Constant Current Sink |
| Single-channel current | Maximum 120mA (adjustable) |
| PWM resolution | 8 bits (256 levels) |
| Group dimming function | Supports (Group PWM + Group Blink) |
| Power supply voltage (VCC) | 2.3V ~ 5.5V |
| LED voltage (VLED) | Up to 17V |
| oscillator | built-in |
| Encapsulation type | TSSOP-24 (PWR) |
| Operating temperature range | -40°C ~ +85°C |
| Address Configuration | Up to 16 I²C addresses |
| Environmental standards | RoHS / Lead-free |
Features
- 16-channel constant current LED driver
- Each channel has independent constant current control.
- Ensure LED brightness consistency
- Simplified control via I²C interface
- Only 2 wires (SCL + SDA) are needed to control 16 LEDs.
- Save MCU I/O resources
- Independent PWM dimming (8-bit)
- Each channel supports 256 levels of brightness control.
- Achieve smooth gradient and fine brightness adjustment
- Group dimming and flashing function
- Supports global brightness adjustment
- It can achieve LED breathing light and flashing effects.
- Programmable output current
- The constant current is set by an external resistor.
- Flexible adaptation to different LEDs
- Supports multi-chip cascading
- Up to 16 devices can be connected to the same I²C bus.
- Scalable to 256-channel LED control
- Built-in oscillator
- No external clock required, reducing system complexity.
Typical application scenarios
LED lighting system
- Ambient lighting, stage lighting, intelligent lighting control
RGB lighting control
- Keyboard backlight
- Gaming equipment lighting effects
Display and backlight system
- LCD backlight
- Dashboard indicator lights
Industrial and communication equipment
- Status indicator array
- Panel control lights
Consumer electronics products
- smart speaker
- wearable devices
- Home appliance panels
Typical application description
In LED control systems:
- The MCU writes registers to the TLC59116 via I²C.
- Set the PWM value for each channel (0–255).
- Controlling LED brightness changes
For example:
- RGB LED: 3 channels control one LED
- 16 channels can control 5 groups of RGB + 1 monochrome LEDs
Performance Comparison
| Index | TLC59116 | PCA9685 | TLC5940 |
| Number of channels | 16 | 16 | 16 |
| Control Interface | I²C | I²C | SPI |
| PWM resolution | 8-bit | 12-bit | 12-bit |
| Constant current output | ✔ | ✘ | ✔ |
| Maximum current | 120mA | external drive | 120mA |
| Application Focus | General LED Control | PWM extension | High-precision LED |
The TLC59116 performs excellently in terms of constant current drive, simple control, and cost balance .
Manufacturer Profile: Texas Instruments
Texas Instruments is a leading global manufacturer of analog and embedded chips, with its LED driver product line widely used in industrial , consumer electronics, and automotive applications.
The TLC59xx series is renowned for its high reliability, stable constant current, and ease of use .
Why choose TLC59116IPWR?
- 16-channel constant current LED control
- I²C interface saves MCU I/O
- Supports independent PWM + group dimming
- Maximum 120mA driving capability
- Supports multi-chip cascading expansion
- Built-in oscillator, no external clock required
- Suitable for lighting, backlighting and lighting effect control
Frequently Asked Questions (FAQ)
Q1: Can it directly drive LEDs?
Yes. This device has a built-in constant current drive circuit , which can directly drive LEDs without the need for an additional series current-limiting resistor. The output current of each channel can be configured simply by setting an external current resistor (such as R<sub>EXT</sub>), simplifying the design and improving consistency.
Q2: Does it support RGB LED control? Yes,
it fully supports it . Each of the three channels can drive R/G/B LEDs separately , achieving full-color control. Combined with PWM dimming, it can achieve rich color mixing and brightness adjustment effects, and is widely used in backlighting, indicator lights, and decorative lighting systems.
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