LP5012 12-Channel I2C constant-current RGB LED driver | TI.com

LP5012
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12-Channel I2C constant-current RGB LED driver

 

Description

In smart homes and other applications that use human-machine-interaction, high-performance RGB LED drivers are required. LED animation effects such as flashing, breathing and chasing that greatly improves user experience, and minimal system noise is essential.

The LP50xx device is an 9- or 12-channel constant current sink LED driver. The LP50xx device includes integrated color mixing and brightness control, and pre-configuration simplifies the software coding process. Integrated 12-bit, 29-kHz PWM generators for each channel enable smooth, vivid color for LEDs, and eliminate audible noise.

The LP50xx device controls each LED output with a 12-bit PWM resolution at 29-kHz switching frequency, which helps achieve a smooth dimming effect and eliminates audible noise. The independent color mixing and intensity control registers make the software coding straightforward. When targeting a fade-in, fade-out type breathing effect, the global R, G, B bank control reduces the microcontroller loading significantly. The LP50xx device also implements a PWM phase-shifting function to help reduce the input power budget when LEDs turn on simultaneously.

The LP50xx device implements an automatic power-saving mode to achieve ultra-low quiescent current. When channels are all off for 30 ms, the device total power consumption is down to 10 µA, which makes the LP50xx device a potential choice for battery-powered end equipment.

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
  • 12 Constant-current sinks with high precision
    • 25.5 mA Maximum per channel with VCC in full range
    • 35 mA Maximum per channel when VCC ≥ 3.3 V
    • Device-to-device error: ±5%; channel-to-channel error: ±5%
  • Ultra-low quiescent current:
    • Shutdown mode: 1 µA (maximum) with EN low
    • Power-saving mode: 10 µA (typical) with 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 PWM-shifting 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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Parametrics

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Part number Order Channels (#) LED current per channel (mA) LED configuration LED (#) Program memory Programmable ramp control Vin (Min) (V) Vin (Max) (V) Vout (Min) (V) Vout (Max) (V) Iout (Max) (A) Iq (Typ) (mA) Shutdown current (Typ) (uA) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LP5012 Order now 12     35     Parallel     12     No       2.7     5.5       6     0.035     0.01     1     Constant Current
Current Control
I2C Control
Power Save Mode    
-40 to 85     WQFN | 20     20WQFN: 9 mm2: 3 x 3 (WQFN | 20)    
LP5009 Order now 9     35     Parallel     9     No       2.7     5.5       6     0.035     0.01     1     Constant Current
Current Control
I2C Control    
-40 to 85     WQFN | 20     20WQFN: 9 mm2: 3 x 3 (WQFN | 20)    
LP5018 Order now 18     35     Parallel     18     No     No     2.7     5.5     2.7     5.5     0.63     0.01     0.2     Constant Current
Current Control
I2C Control
Power Save Mode    
-40 to 125     VQFN | 32     32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
LP5024 Order now 24     35     Parallel     24     No     No     2.7     5.5     2.7     5.5     0.84     0.01     0.2     Constant Current
Current Control
I2C Control
Power Save Mode    
-40 to 85     VQFN | 32     32VQFN: 16 mm2: 4 x 4 (VQFN | 32)    
LP5030 Order now 30     35     Parallel     30     No     No     2.7     5.5     2.7     6     1.05     0.01     1     Constant Current
Current Control
I2C Control
Power Save Mode    
-40 to 125     VQFN | 46     46VQFN: 30 mm2: 5 x 6 (VQFN | 46)    
LP5036 Order now 36     35     Parallel     36