LP5523 Texas instruments

LP5523

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LP5523

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Описание

The LP5523 is a 9-channel LED driver designed to produce lighting effects for mobile devices. A high-efficiency charge pump enables LED driving over full Li-Ion battery voltage range. The device is equipped with an internal program memory, which allows operation without processor control. The LP5523 maintains excellent efficiency over a wide operating range by autonomously selecting the best charge-pump gain based on LED forward voltage requirements. The LP5523 is able to automatically enter power-save mode when LED outputs are not active, thus lowering idle current consumption down to 10 µA (typical). The LP5523 has an I2C-compatible control interface with four pin selectable addresses. The device has a flexible general purpose output (GPO), which can be used as a digital control pin for other devices. INT pin can be used to notify processor when a lighting sequence has ended (interrupt function). Also, the device has a trigger input interface, which allows synchronization, for example, between multiple LP5523 devices. The device requires only four small, low-cost ceramic capacitors. The LP5523 is available in a tiny 25-pin DSBGA package (0.4-mm pitch). For all available packages, see the orderable addendum at the end of the data sheet.

Three Independent Program Execution Engines, Nine Programmable Outputs with 25.5-mA Full-Scale Current, 8-Bit Current Setting Resolution, and 12-Bit PWM Control Resolution
Adaptive High-Efficiency 1×/1.5× Fractional Charge Pump - Efficiency Up to 94%
LED Drive Efficiency Up to 93%
Charge Pump With Soft Start and Overcurrent and Short-Circuit Protection
Built-in LED Test
200-nA Typical Standby Current
Automatic Power-Save Mode
I_VDD = 10 µA (Typical)
Two-Wire I²C-Compatible Control Interface
Flexible Instruction Set
Large SRAM Program Memory
Small Application Circuit
Source (High-Side) Drivers
Architecture Supports Color Control

Number of channels	9
LED current per channel (mA)	25.5
LED configuration	Parallel
Program memory	Yes
Topology	Charge pump
Programmable ramp control	Yes
Vin (min) (V)	2.7
Vin (max) (V)	5.5
Iout (max) (A)	0.225
Features	Analog/PWM mixed dimming, Constant current, Current control, I2C control, Power-save mode, Programmable lighting engines
Iq (typ) (mA)	0.8
Shutdown current (ISD) (typ) (µA)	0.2
Operating temperature range (°C)	-30 to 85
Rating	Catalog