LP5569

• Supply Voltage Range: 2.5 V–5.5 V
• Nine High-Accuracy Current Sinks
  • 25.5 mA Maximum per Channel
  • 8-Bit Individual Current Control
  • 12-Bit 20-kHz Internal Individual PWM Control Without Audio Noise
• Three Programmable LED Engines
  • Independent Illumination Control Without Active Microcontroller Control
  • Synchronization Among Multiple Devices
  • Up to 256 Instructions in SRAM Memory for Storing Sequences of Lighting Patterns
  • LP5523- and LP55231-Device-Compatible Command Set
• Flexible Dimming Control
  • I²C Dimming Control
  • PWM Direct-Input Dimming
  • PWM Input Frequency: 100-Hz to 20-kHz
• Adaptive High-Efficiency Charge-Pump Control for Driving High-V_F LEDs With Low Battery Voltage
• Master Fader Control Allows Dimming of Multiple LEDs by Writing to Only One Register to Reduce the I²C Bus Traffic
• 2-µA Low Standby Current and 10-µA in Automatic Power-Save Mode When LEDs Are Inactive
• POR, UVLO, and TSD Protection

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The LP5569 device is a programmable, easy-to-use 9-channel I²C LED driver designed to produce lighting effects for various applications. The LED driver is equipped with an internal SRAM memory for user-programmed sequences and three programmable LED engines, which allow operation without processor control. Autonomous operation reduces system power consumption when the processor is put in sleep mode.

A high-efficiency charge pump enables the driving of LEDs with high V_F, even with 2.5-V input voltage. The LP5569 LED driver maintains good efficiency over a wide operational voltage range by autonomously selecting the best charge-pump gain based on LED forward voltage requirements.

The LP5569 device enters power-save mode when LEDs are not active, lowering idle-current consumption considerably. A flexible digital interface allows the connection of up to eight LP5569 devices with a unique I²C slave address for each device in the same system, which supports synchronization of the lighting effects among all devices.