30-channel I2C constant current RGB LED driver
Product details
Parameters
Package | Pins | Size
Features
- Operating Voltage Range:
- VCC Range: 2.7 V to 5.5 V
- EN, SDA, and SCL Pins Compatible With 1.8-V, 3.3-V, and 5-V Power Rails
- Output Maximum Voltage: 6 V
- 36 Constant-Current Sinks With High Precision
- 25.5 mA Maximum per Channel When VCC in Full Range
- 35 mA Maximum per Channel When VCC ≥ 3.3 V
- Device-to-Device Error ±5%; Channel-to-Channel Error ±5%
- Ultralow Quiescent Current:
- Shutdown Mode: 1 µA (Maximum) When EN Low
- Power Saving Mode: 12 µA (Maximum) When EN High and All LEDs Off for > 30 ms
- Integrated 12-Bit, 29-kHz PWM Generator for Each Channel:
- Independent Color-Mixing Register Per Channel
- Independent Brightness-Control Register Per RGB LED Module
- Optional Logarithmic- or Linear-Scale Brightness Control
- Integrated 3-Phase-Shifting PWM Scheme
- 3 Programmable Banks (R, G, B) for Easy Software Control of Each Color
- 2 External Hardware Address Pins Allow Connecting up to 4 Devices
- Broadcast Slave Address Allows Configuring Multiple Devices Simultaneously
- Auto-Increment Allows Writing or Reading Consecutive Registers Within One Transmission
- Up to 400-kHz Fast-Mode I2C Speed
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Description
Efficient and high-performance LED response effects, such as blinking, breathing, and chasing, are critical to improving end-user experience in many human machine interface (HMI) applications.
The LP503x device is a 30- or 36-channel constant-current-sink LED driver. The LP503x has a 29 kHz, 12-Bit PWM generator for each channel, as well as channel/module independent color mixing and intensity control, formerly called brightness control registers to enable vivid LED effects with zero audible noise. Users can benefit from the device’s ultra-low shutdown Iq Power Saving Mode, while designers will appreciate the incredibly straightforward software coding of the LP503x’s three programmable R G B banks.
The LP503x device controls each LED output with a 12-bit PWM resolution at 29-kHz switching frequency. This control helps get an intensity that decreases smoothly and stops audible noise. Having different color-mixing and intensity-control registers makes writing the software code straightforward. When targeting fade-in, fade-out type breathing effects, the global R, G, B bank control reduces the microcontroller loading significantly. The LP503x device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.
The LP503x device has an automatic power-saving mode to get the ultra-low quiescent current. When channels are all off for 30 ms, the device total power consumption is down to 10 µA, making the LP503x device a possible alternative for battery-powered end equipment.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LP503x 36-, 30-Channel 12-Bit PWM Ultra-low Quiescent Current I2C RGB LED Drivers datasheet (Rev. B) | Jan. 21, 2019 |
White paper | Common LED Functions and LED Driver Design Considerations | Sep. 21, 2020 | |
Application note | System Design Guidelines for Full-Color RGB LED Matrix Based on LP50xx Device | Apr. 08, 2020 | |
Application note | How to Select a RGB LED Driver | Aug. 08, 2019 | |
White paper | Smart speaker fundamentals: Weighing the many design trade-offs | Feb. 25, 2019 | |
White paper | 智慧型喇叭基本說明: 衡量各種設計優缺點 | Feb. 08, 2019 | |
White paper | 스마트 스피커 기본 사항: 설계 장단점 따져 보기 | Feb. 08, 2019 | |
Technical articles | Using an RGBW LED driver to elevate LED human-machine interface designs | Nov. 27, 2018 | |
Technical articles | Here's how body electronics and lighting technology are changing the driving experience | Sep. 26, 2016 | |
Technical articles | LED brightness adjustment: high-frequency PWM dimming | Aug. 26, 2016 | |
Technical articles | Take better selfies with innovative LED flashes | Nov. 18, 2014 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
Step 1: Order the hardware
Step 2: Download and install the LP50EVM user GUI and review the EVM users guide
- Our LP50EVM GUI is used with the LP50EVM to evaluate the features of the LP50xx device.
Step 3: If you plan to use a MCU based system software, please see this e2e™ post (...)
Features
- Easy to Verify the LP5036 Device Full Function
- Easy to Confirm the LP5036 Device Porfermance with the RBG LED Modules
- Easy to Design the Fashion Lighting Pattern with the Demo Effect
Software development
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
VQFN (RJV) | 46 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
TI E2E™ forums with technical support from TI engineers
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