SNVS541H October   2007  – August 2016 LM3410 , LM3410-Q1

PRODUCTION DATA.  

  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 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 Current Limit
      2. 7.3.2 DIM Pin and Shutdown Mode
    4. 7.4 Device Functional Modes
      1. 7.4.1 Thermal Shutdown
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Boost Converter
        1. 8.1.1.1 Setting the LED Current
        2. 8.1.1.2 LED-Drive Capability
        3. 8.1.1.3 Inductor Selection
        4. 8.1.1.4 Input Capacitor
        5. 8.1.1.5 Output Capacitor
        6. 8.1.1.6 Diode
        7. 8.1.1.7 Output Overvoltage Protection
      2. 8.1.2 SEPIC Converter
        1. 8.1.2.1 SEPIC Equations
        2. 8.1.2.2 Steady State Analysis with Loss Elements
          1. 8.1.2.2.1 Details
    2. 8.2 Typical Applications
      1. 8.2.1  Low Input Voltage, 1.6-MHz, 3 to 5 White LED Output at 50-mA Boost Converter
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
          1. 8.2.1.2.1 Set the LED Current (R1)
          2. 8.2.1.2.2 Calculate Maximum Duty Cycle (DMAX)
          3. 8.2.1.2.3 Calculate the Inductor Value (L1)
          4. 8.2.1.2.4 Calculate the Output Capacitor (C2)
          5. 8.2.1.2.5 Input Capacitor (C1) and Schottky Diode (D1)
        3. 8.2.1.3 Application Curves
      2. 8.2.2  LM3410X SOT-23: 5 × 1206 Series LED String Application
        1. 8.2.2.1 Design Requirements
      3. 8.2.3  LM3410Y SOT-23: 5 × 1206 Series LED String Application
        1. 8.2.3.1 Design Requirements
      4. 8.2.4  LM3410X WSON: 7 × 5 LED Strings Backlighting Application
        1. 8.2.4.1 Design Requirements
      5. 8.2.5  LM3410X WSON: 3 × HB LED String Application
        1. 8.2.5.1 Design Requirements
      6. 8.2.6  LM3410Y SOT-23: 5 × 1206 Series LED String Application With OVP
        1. 8.2.6.1 Design Requirements
      7. 8.2.7  LM3410X SEPIC WSON: HB or OLED Illumination Application
        1. 8.2.7.1 Design Requirements
      8. 8.2.8  LM3410X WSON: Boost Flash Application
        1. 8.2.8.1 Design Requirements
      9. 8.2.9  LM3410X SOT-23: 5 × 1206 Series LED String Application With VIN > 5.5 V
        1. 8.2.9.1 Design Requirements
      10. 8.2.10 LM3410X WSON: Camera Flash or Strobe Circuit Application
        1. 8.2.10.1 Design Requirements
      11. 8.2.11 LM3410X SOT-23: 5 × 1206 Series LED String Application With VIN and VPWR Rail > 5.5 V
        1. 8.2.11.1 Design Requirements
      12. 8.2.12 LM3410X WSON: Boot-Strap Circuit to Extend Battery Life
        1. 8.2.12.1 Design Requirements
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Thermal Considerations
      1. 10.3.1 Design
      2. 10.3.2 LM3410 and LM3410-Q1 Thermal Models
      3. 10.3.3 Calculating Efficiency and Junction Temperature
        1. 10.3.3.1 Quiescent Power Losses
        2. 10.3.3.2 RSET Power Losses
      4. 10.3.4 Example Efficiency Calculation
      5. 10.3.5 Calculating RθJA and RΨJC
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 Related Links
    4. 11.4 Receiving Notification of Documentation Updates
    5. 11.5 Community Resources
    6. 11.6 Trademarks
    7. 11.7 Electrostatic Discharge Caution
    8. 11.8 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

1 Features

  • Qualified for Automotive Applications
  • AEC-Q100 Test Guidance With the Following:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C6
  • Space-Saving SOT-23 and WSON Packages
  • Input Voltage From 2.7 V to 5.5 V
  • Output Voltage From 3 V to 24 V
  • 2.8-A (Typical) Switch Current Limit
  • High Switching Frequency
    • 525 KHz (LM3410Y)
    • 1.6 MHz (LM3410X)
  • 170-mΩ NMOS Switch
  • 190-mV Internal Voltage Reference
  • Internal Soft Start
  • Current-Mode, PWM Operation
  • Thermal Shutdown

2 Applications

  • LED Backlight Current Sources
  • LiIon Backlight OLED and HB LED Drivers
  • Handheld Devices
  • LED Flash Drivers
  • Automotive Applications

3 Description

The LM3410 and LM3410-Q1 constant current LED driver are a monolithic, high frequency, PWM DC-DC converter, available in 6-pin WSON, 8-pin MSOP-PowerPad™, and 5-pin SOT-23 packages. With a minimum of external components the LM3410 and LM3410-Q1 are easy to use. It can drive 2.8-A (typical) peak currents with an internal 170-mΩ NMOS switch. Switching frequency is internally set to either 525 kHz or 1.6 MHz, allowing the use of extremely small surface mount inductors and chip capacitors. Even though the operating frequency is high, efficiencies up to 88% are easy to achieve. External shutdown is included, featuring an ultra-low standby current of 80 nA. The LM3410 and LM3410-Q1 use current-mode control and internal compensation to provide high-performance over a wide range of operating conditions. Additional features include PWM dimming, cycle-by-cycle current limit, and thermal shutdown.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
LM3410, LM3410Q WSON (6) 3.00 mm × 3.00 mm
MSOP-PowerPAD (8) 2.90 mm × 1.60 mm
SOT-23 (5) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Typical Boost Application Circuit

LM3410 LM3410-Q1 30038501.gif

Typical Efficiency (LM3410X)

LM3410 LM3410-Q1 30038502.gif