Programmable LED Driver - LP5523

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

查看更多内容

参数 与其它产品相比 RGB 和白光 LED 驱动器

 
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
Rating
Operating Temperature Range (C)
Pin/Package
LP5523 LP5521 LP55231 LP5562 LP5569
9    3    9    4    9   
25.5    25.5    25.5    25.5    25.5   
Parallel    Parallel    Parallel    Parallel    Parallel   
9    3    9    4    9   
Yes    Yes    Yes    Yes    Yes   
Yes    Yes    Yes    Yes    Yes   
2.7    2.7    2.7    2.7    2.5   
5.5    5.5    5.5    5.5    5.5   
2.7    2.7    2.7    2.7    2.5   
5.5    5.5    5.5    5.5    5.5   
0.225    0.0765    0.0255    0.11    0.23   
0.8    1.5    0.8    1    0.002   
0.2    0.2    0.2    0.2    0.2   
93    95    94    100    94   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
I2C Control
Programmable Lighting Engines   
Analog/PWM Mixed Dimming
Constant Current
Current Control
Direct PWM Dimming
I2C Control
Programmable Lighting Engines   
Catalog    Catalog    Catalog    Catalog    Catalog   
-30 to 85    -30 to 85    -30 to 85    -40 to 85    -40 to 85   
25DSBGA    20DSBGA
24WQFN   
24WQFN    12DSBGA    24WQFN