Overview
The LP5009RUKR is a 9-channel I2C constant-current RGB LED driver produced by Texas Instruments. This device is designed for applications requiring high-performance LED control, such as smart homes and human-machine interaction systems. It features integrated color mixing and brightness control, making it ideal for creating complex LED animation effects like flashing, breathing, and chasing. The LP5009RUKR operates within a voltage range of 2.7 V to 5.5 V and is compatible with 1.8-V, 3.3-V, and 5-V power rails, ensuring versatility in various system designs.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | WQFN (RUK) | 20 pins |
| Operating Temperature Range | -40°C to 85°C | |
| Operating Voltage Range | VCC range | 2.7 V to 5.5 V |
| Output Maximum Voltage | 6 V | |
| Maximum Sink Current per Channel | VCC in full range | 25.5 mA |
| Maximum Sink Current per Channel | VCC ≥ 3.3 V | 35 mA |
| Device-to-Device Current Error | ±5% | |
| Channel-to-Channel Current Error | ±5% | |
| PWM Switching Frequency | 29 kHz | |
| Quiescent Current in Shutdown Mode | 1 µA (maximum) | |
| Quiescent Current in Power-Saving Mode | 10 µA (typical) |
Key Features
- Operating voltage range: 2.7 V to 5.5 V, with EN, SDA, and SCL pins compatible with 1.8-V, 3.3-V, and 5-V power rails.
- 12 constant-current sinks with high precision, up to 35 mA per channel when VCC ≥ 3.3 V.
- Integrated 12-bit, 29-kHz PWM generator for each channel, enabling smooth and vivid color display.
- Independent color-mixing and brightness-control registers per channel.
- Optional logarithmic- or linear-scale brightness control.
- Integrated 3-phase PWM-shifting scheme to reduce input power budget.
- Programmable banks (R, G, B) for easy software control of each color.
- External hardware address pins allowing up to 4 devices to be connected.
- Broadcast slave address for simultaneous configuration of multiple devices.
- Auto-increment feature for writing or reading consecutive registers within one transmission.
- Up to 400-kHz fast-mode I2C speed.
- Ultra-low quiescent current in shutdown and power-saving modes.
Applications
The LP5009RUKR is suitable for various applications that require advanced LED control, including:
- Smart home lighting systems.
- Human-machine interaction (HMI) systems.
- LED signage and display systems.
- Automotive interior lighting.
- Battery-powered devices requiring low power consumption.
Q & A
- What is the operating voltage range of the LP5009RUKR?
The operating voltage range is 2.7 V to 5.5 V.
- How many channels does the LP5009RUKR support?
The LP5009RUKR supports 9 channels.
- What is the maximum sink current per channel?
The maximum sink current per channel is 25.5 mA in the full VCC range and up to 35 mA when VCC ≥ 3.3 V.
- What is the PWM switching frequency of the LP5009RUKR?
The PWM switching frequency is 29 kHz.
- How does the LP5009RUKR manage power consumption in standby modes?
The device has an ultra-low quiescent current of 1 µA in shutdown mode and 10 µA in power-saving mode when all LEDs are off for more than 30 ms.
- What communication protocol does the LP5009RUKR use?
The LP5009RUKR uses the I2C protocol with up to 400-kHz fast-mode speed.
- Can multiple LP5009RUKR devices be controlled simultaneously?
- What is the package type of the LP5009RUKR?
The package type is WQFN-20 with an exposed thermal pad.
- What are the key benefits of the integrated 3-phase PWM-shifting scheme?
The integrated 3-phase PWM-shifting scheme helps reduce the input power budget when LEDs turn on simultaneously.
- How does the LP5009RUKR support color mixing and brightness control?
The device features independent color-mixing and brightness-control registers per channel, along with optional logarithmic- or linear-scale brightness control.
