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36-Channel I2C constant current RGB LED driver

Availability: 11,007


Package | PIN: VQFN (RJV) | 46
Temp: Q (-40 to 125)
Package qty | Carrier: 3,000 | LARGE T&R
Qty Price
1-99 $2.13
100-249 $1.85
250-999 $1.26
1,000+ $0.95


  • Operating Voltage Range:
    • VCC Range: 2.7 Vto 5.5 V
    • EN, SDA, and SCL Pins Compatible With 1.8-V,3.3-V, and 5-V Power Rails
    • Output Maximum Voltage: 6V
  • 36 Constant-Current Sinks With High Precision
    • 25.5 mA Maximum per Channel WhenVCC in Full Range
    • 35 mA Maximum perChannel When VCC ≥ 3.3 V
    • Device-to-Device Error ±5%; Channel-to-Channel Error±5%
  • Ultralow Quiescent Current:
    • Shutdown Mode: 1 µA (Maximum) When ENLow
    • Power Saving Mode: 12 µA (Maximum) When EN High and AllLEDs Off for > 30 ms
  • Integrated 12-Bit, 29-kHz PWM Generator for Each Channel:
    • Independent Color-Mixing Register PerChannel
    • Independent Brightness-Control Register Per RGBLED Module
    • Optional Logarithmic- or Linear-ScaleBrightness Control
    • Integrated 3-Phase-Shifting PWMScheme
  • 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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Texas Instruments  LP5036RJVR

Efficient and high-performance LED response effects, such as blinking, breathing, andchasing, 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 hasa 29 kHz, 12-Bit PWM generator for each channel, as well as channel/module independent color mixingand intensity control, formerly called brightness controlregisters to enable vivid LED effects with zero audible noise. Users can benefit from the device’sultra-low shutdown Iq Power Saving Mode, while designers will appreciate the incrediblystraightforward 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-kHzswitching frequency. This control helps get an intensity thatdecreases smoothly and stops audible noise. Having different color-mixing and intensity-controlregisters makes writing the software code straightforward. When targeting fade-in, fade-out typebreathing effects, the global R, G, B bank control reduces the microcontroller loadingsignificantly. The LP503x device also implements a PWM phase-shifting function to help reduce theinput power budget when LEDs turn on simultaneously.

The LP503x device has an automatic power-saving mode to get the ultra-low quiescentcurrent. 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.