LP5569 Texas instruments

LP5569

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LP5569

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Описание

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 VF, 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.

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

Number of channels	9
LED current per channel (mA)	22.5
LED configuration	Parallel
Program memory	Yes
Topology	Charge pump, Current Sink
Programmable ramp control	Yes
Vin (min) (V)	2.5
Vin (max) (V)	5.5
Iout (max) (A)	0.23
Features	Analog/PWM mixed dimming, Constant current, Current control, Direct PWM dimming, I2C control, Power-save mode, Programmable lighting engines
Iq (typ) (mA)	0.002
Shutdown current (ISD) (typ) (µA)	0.2
Operating temperature range (°C)	-40 to 85
Rating	Catalog