LP5523 Programmable LED Driver | 德州仪器 TI.com.cn

LP5523 (正在供货) Programmable LED Driver

 

描述

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.

特性

  • 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
    IVDD = 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

参数

与其它产品相比 RGB和白色LED驱动器 邮件 下载到电子表格中
Part number 立即下单 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) Peak efficiency (%) Features Operating temperature range (C) Package Group Package size: mm2:W x L (PKG)
LP5523 立即下单 9     25.5     Parallel     9     Yes     Yes     2.7     5.5     2.7     5.5     0.225     0.8     0.2     93     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-30 to 85     DSBGA | 25     See datasheet (DSBGA)    
LP5521 立即下单 3     25.5     Parallel     3     Yes     Yes     2.7     5.5     2.7     5.5     0.0765     1.5     0.2     95     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-30 to 85     DSBGA | 20
WQFN | 24    
See datasheet (DSBGA)
24WQFN: 20 mm2: 4 x 5 (WQFN | 24)    
LP55231 立即下单 9     25.5     Parallel     9     Yes     Yes     2.7     5.5     2.7     5.5     0.0255     0.8     0.2     94     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-30 to 85     WQFN | 24     24WQFN: 16 mm2: 4 x 4 (WQFN | 24)    
LP5562 立即下单 4     25.5     Parallel     4     Yes     Yes     2.7     5.5     2.7     5.5     0.11     1     0.2     100     Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Power Save Mode
Programmable Lighting Engines    
-40 to 85     DSBGA | 12     See datasheet (DSBGA)    
LP5569 立即下单 9     25.5     Parallel     9     Yes     Yes     2.5     5.5     2.5     5.5     0.23     0.002