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LM3699

ACTIVE

High-efficiency white LED driver

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Data sheet

LM3699

ACTIVE
Data sheet Order now

Product details

Number of channels 3 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 24 Type Inductive Switching frequency (max) (kHz) 1120 Duty cycle (max) (%) 94 LED current per channel (mA) 20.2 Peak efficiency (%) 90 Topology Boost Features CABC, Direct PWM Dimming, Enable/Shutdown, Integrated Switch, OVP, PWM control, Synchronous Rectification, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
Number of channels 3 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 24 Type Inductive Switching frequency (max) (kHz) 1120 Duty cycle (max) (%) 94 LED current per channel (mA) 20.2 Peak efficiency (%) 90 Topology Boost Features CABC, Direct PWM Dimming, Enable/Shutdown, Integrated Switch, OVP, PWM control, Synchronous Rectification, Thermal shutdown Operating temperature range (°C) -40 to 125 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² 1.8 x 1.4000000000000001
  • Drives Parallel High-Voltage LED Strings
    for Display or Keypad Lighting
  • Boost Converter up to 90% Efficiency
  • Four User-Selectable Full-Scale Current Settings
    (20.2 mA, 18.6 mA, 17.0 mA, 15.4 mA)
  • Quick-Dimming Enable Terminal (ILOW)
  • Simple PWM Duty Cycle Control
  • 24-V Overvoltage Protection Threshold
  • Fixed 1-MHz Switching Frequency
  • Integrated 1-A/40-V MOSFET
  • Three Current Sink Terminals
  • Adaptive Boost Output to LED Voltages
  • Thermal Shutdown Protection
  • 29-mm2 Total Solution Size
  • Drives Parallel High-Voltage LED Strings
    for Display or Keypad Lighting
  • Boost Converter up to 90% Efficiency
  • Four User-Selectable Full-Scale Current Settings
    (20.2 mA, 18.6 mA, 17.0 mA, 15.4 mA)
  • Quick-Dimming Enable Terminal (ILOW)
  • Simple PWM Duty Cycle Control
  • 24-V Overvoltage Protection Threshold
  • Fixed 1-MHz Switching Frequency
  • Integrated 1-A/40-V MOSFET
  • Three Current Sink Terminals
  • Adaptive Boost Output to LED Voltages
  • Thermal Shutdown Protection
  • 29-mm2 Total Solution Size

The LM3699 is a three-string, high-efficiency, PWM-controlled power source for display backlight or keypad LEDs in smartphone handsets. The high-voltage inductive boost converter with integrated 1-A, 40-V MOSFET provides the power for three series LED strings. The boost output automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The ILOW terminal provides a method to quickly reduce LED brightness during camera flash operation.

The LM3699 has integrated overvoltage, overcurrent, and thermal protection.

The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.

The LM3699 is a three-string, high-efficiency, PWM-controlled power source for display backlight or keypad LEDs in smartphone handsets. The high-voltage inductive boost converter with integrated 1-A, 40-V MOSFET provides the power for three series LED strings. The boost output automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The ILOW terminal provides a method to quickly reduce LED brightness during camera flash operation.

The LM3699 has integrated overvoltage, overcurrent, and thermal protection.

The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.
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Technical documentation

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* Data sheet LM3699 High-Efficiency White LED Driver datasheet (Rev. A) PDF | HTML 28 Mar 2014
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
EVM User's guide LM3699EVM User Guide 24 Mar 2014

Design & development

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Evaluation board

LM3699EVM — LM3699EVM Evaluation Module

The LM3699 Evaluation Module (LM3699EVM) is designed to fully evaluate the LM3699 PWM-only Three String backlight driver. The LM3699EVM consists of the LM3699 with 3p7s white LED strings.

User guide: PDF
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PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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DSBGA (YFQ) 12 View options
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