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  • LP5523 Nine-Channel RGB- and White-LED Driver With Internal Program Memory and Integrated Charge Pump – DSBGA Package

    • SNVS550E September   2009  – January 2017 LP5523

      PRODUCTION DATA.  

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  • LP5523 Nine-Channel RGB- and White-LED Driver With Internal Program Memory and Integrated Charge Pump – DSBGA Package
  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configuration and Functions
  6. 6 Specifications
    1. 6.1  Absolute Maximum Ratings
    2. 6.2  ESD Ratings
    3. 6.3  Recommended Operating Conditions
    4. 6.4  Thermal Information
    5. 6.5  Electrical Characteristics
    6. 6.6  Charge Pump Electrical Characteristics
    7. 6.7  LED Driver Electrical Characteristics
    8. 6.8  LED Test Electrical Characteristics
    9. 6.9  Logic Interface Characteristics
    10. 6.10 Recommended External Clock Source Conditions
    11. 6.11 Serial Bus Timing Parameters (SDA, SCL)
    12. 6.12 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Programming
      2. 7.3.2 LED Error Detection
      3. 7.3.3 Energy Efficiency
      4. 7.3.4 Temperature Compensation
      5. 7.3.5 Charge Pump Operational Description
        1. 7.3.5.1 Overview
        2. 7.3.5.2 Output Resistance
        3. 7.3.5.3 Controlling The Charge Pump
        4. 7.3.5.4 LED Forward Voltage Monitoring
        5. 7.3.5.5 Gain Change Hysteresis
      6. 7.3.6 LED Driver Operational Description
        1. 7.3.6.1 Overview
        2. 7.3.6.2 Powering LEDs
        3. 7.3.6.3 Controlling The High-Side LED Drivers
    4. 7.4 Device Functional Modes
      1. 7.4.1 Modes Of Operation
        1. 7.4.1.1 Automatic Power-Save Mode
        2. 7.4.1.2 PWM Power-Save Mode
    5. 7.5 Programming
      1. 7.5.1 I2C-Compatible Control Interface
        1. 7.5.1.1 Data Validity
        2. 7.5.1.2 Start and Stop Conditions
        3. 7.5.1.3 Transferring Data
        4. 7.5.1.4 I2C-Compatible Chip Address
          1. 7.5.1.4.1 Control Register Write Cycle
          2. 7.5.1.4.2 Control Register Read Cycle
          3. 7.5.1.4.3 Auto-Increment Feature
    6. 7.6 Register Maps
      1. 7.6.1 Register Set
      2. 7.6.2 Control Register Details
      3. 7.6.3 Instruction Set
      4. 7.6.4 LED Driver Instructions
        1. 7.6.4.1 Ramp
        2. 7.6.4.2 Ramp Instruction Application Example
        3. 7.6.4.3 Set_PWM
        4. 7.6.4.4 Wait
      5. 7.6.5 LED Mapping Instructions
      6. 7.6.6 Branch Instructions
      7. 7.6.7 Arithmetic Instructions
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Applications
      1. 8.2.1 Using Two LP5523 Devices in Same Application
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Recommended External Components
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Driving Haptic Feedback with LP5523
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Community Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information
  13. IMPORTANT NOTICE
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DATA SHEET

LP5523 Nine-Channel RGB- and White-LED Driver With Internal Program Memory and Integrated Charge Pump – DSBGA Package

1 Features

  • 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

2 Applications

  • Fun Lights and Indicator Lights
  • LED Backlighting
  • Haptic Feedback
  • Programmable Current Source

3 Description

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).

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LP5523 DSBGA (25) 2.26 mm × 2.26 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Application

LP5523 30043601.gif

4 Revision History

Changes from D Revision (May 2013) to E Revision

  • Changed title of data sheet for SEO Go
  • Added Device Information and Pin Configuration and Functions sections, ESD Ratings and Thermal Information tables, Feature Description, Device Functional Modes, Application and Implementation, Power Supply Recommendations, Layout, Device and Documentation Support, and Mechanical, Packaging, and Orderable Information sectionsGo
  • Changed RθJA value from "87°C/W" to "60.9°C/W"Go
  • Added values in the Thermal Information table to align with JEDEC standards. Go

Changes from C Revision (April 2013) to D Revision

  • Changed layout of National Semiconductor data sheet to TI formatGo

5 Pin Configuration and Functions

YFQ Package
25-Pin DSBGA
Top View
LP5523 30043602.gif
YFQ Package
25-Pin DSBGA
Bottom View
LP5523 30043603.gif

Pin Functions(1)

PIN TYPE DESCRIPTION
NO. NAME
A1 D1 A Current source output 1
A2 D2 A Current source output 2
A3 VOUT A Charge pump output
A4 C2− A Flying capacitor 2 negative terminal
A5 C2+ A Flying capacitor 2 positive terminal
B1 D3 A Current source output 3
B2 D4 A Current source output 4
B3 ASEL1 I Serial interface address select input
B4 C1− A Flying capacitor 1 negative terminal
B5 C1+ A Flying capacitor 1 positive terminal
C1 D5 A Current source output 5
C2 D6 A Current source output 6
C3 ASEL0 I Serial interface address select input
C4 EN I Enable
C5 VDD P Input power supply
D1 D7 A Current source output 7 - powered from VDD
D2 D8 A Current source output 8 - powered from VDD
D3 INT OD/O Interrupt for microcontroller unit. Leave unconnected if not used
D4 CLK I 32 kHz clock input. Connect to ground if not used
D5 GND G Ground
E1 D9 A Current source output 9 - powered from VDD
E2 GPO O General purpose output. Leave unconnected if not used
E3 TRIG I/OD Trigger. Connect to ground if not used.
E4 SDA I/OD Serial interface data
E5 SCL I Serial interface clock
(1) A: Analog Pin G: Ground Pin P: Power Pin I: Input Pin I/O: Input/Output Pin O: Output Pin OD: Open Drain Pin

 
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