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LM3633

ACTIVE

Complete lighting power Solution for smartphone handsets

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Data sheet

LM3633

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) 41 Type Inductive Switching frequency (max) (kHz) 1100 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 90 Topology Boost Features Adjustable Switch Frequency, Analog Dimming, CABC, Enable/Shutdown, I2C control, Integrated Switch, OVP, Synchronous Rectification, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 3 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) 0 Vout (max) (V) 41 Type Inductive Switching frequency (max) (kHz) 1100 Duty cycle (max) (%) 94 LED current per channel (mA) 30 Peak efficiency (%) 90 Topology Boost Features Adjustable Switch Frequency, Analog Dimming, CABC, Enable/Shutdown, I2C control, Integrated Switch, OVP, Synchronous Rectification, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFQ) 20 3.96 mm² 2.2 x 1.8
  • Drives Three Parallel High-Voltage LED Strings
    for Display and Keypad Lighting
  • High-Voltage Strings Capable of up to 40-V
    Output Voltage and up to 90% Efficiency
  • Up to 30-mA per Current Sink
    (Both Backlight and Indicator)
  • 11-Bit High-Voltage LED Dimming
  • PWM Input for Content Adjustable Brightness
    Control (CABC)
  • Integrated 1-A/40-V MOSFET
  • Adaptive Boost Output to LED Voltages
  • Six Low-Voltage Current Sinks for Indicator LEDs
  • Integrated Charge Pump for Improved Efficiency
    and VIN Operating Range
  • Internal Pattern Generation Engine for Each
    Indicator LED
  • Fully Configurable LED Grouping and Control
  • Four Programmable Overvoltage Protection
    Thresholds (16 V, 24 V, 32 V, and 40 V)
  • Programmable 500-kHz and 1-MHz
    Switching Frequency
  • Overcurrent Protection
  • Thermal Shutdown Protection
  • 27 mm2 Total Solution Size
  • Drives Three Parallel High-Voltage LED Strings
    for Display and Keypad Lighting
  • High-Voltage Strings Capable of up to 40-V
    Output Voltage and up to 90% Efficiency
  • Up to 30-mA per Current Sink
    (Both Backlight and Indicator)
  • 11-Bit High-Voltage LED Dimming
  • PWM Input for Content Adjustable Brightness
    Control (CABC)
  • Integrated 1-A/40-V MOSFET
  • Adaptive Boost Output to LED Voltages
  • Six Low-Voltage Current Sinks for Indicator LEDs
  • Integrated Charge Pump for Improved Efficiency
    and VIN Operating Range
  • Internal Pattern Generation Engine for Each
    Indicator LED
  • Fully Configurable LED Grouping and Control
  • Four Programmable Overvoltage Protection
    Thresholds (16 V, 24 V, 32 V, and 40 V)
  • Programmable 500-kHz and 1-MHz
    Switching Frequency
  • Overcurrent Protection
  • Thermal Shutdown Protection
  • 27 mm2 Total Solution Size

The LM3633 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 parallel high-voltage LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3633 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for three parallel LED strings (HVLED1, HVLED2 and HVLED3). The integrated charge pump provides the bias for the six low-voltage indicator LEDs (LVLED1-LVLED6). All low-voltage current sinks can have a programmable pattern modulated onto their output current for a wide variety of blinking patterns.

An additional feature is a Pulse Width Modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3633 is fully programmable via an I2C-compatible interface. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.

For all available packages, see the orderable addendum at the end of the datasheet.

The LM3633 11-bit LED driver provides high-performance backlight dimming for 1, 2, or 3 parallel high-voltage LED strings while delivering up to 90% efficiency. The boost converter with integrated 1-A, 40-V MOSFET automatically adjusts to LED forward voltage to minimize headroom voltage and effectively improve LED efficiency.

The LM3633 is a complete power source for backlight, keypad, and indicator LEDs in smartphone handsets. The high-voltage inductive boost converter provides the power for three parallel LED strings (HVLED1, HVLED2 and HVLED3). The integrated charge pump provides the bias for the six low-voltage indicator LEDs (LVLED1-LVLED6). All low-voltage current sinks can have a programmable pattern modulated onto their output current for a wide variety of blinking patterns.

An additional feature is a Pulse Width Modulation (PWM) control input for content adjustable backlight control, which can be used to control any high-voltage current sink.

The LM3633 is fully programmable via an I2C-compatible interface. The device operates over a 2.7-V to 5.5-V input voltage range and a −40°C to 85°C temperature range.

For all available packages, see the orderable addendum at the end of the datasheet.
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LM3697 ACTIVE 3 String backlight driver with 11-bits of Exponential dimming This product is a three channel backlight with 11-bit dimming.

Technical documentation

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Type Title Date
* Data sheet LM3633 Complete Lighting Power Solution for Smartphone Handsets datasheet PDF | HTML 04 Jun 2014
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020
Application note Analog PWM Dimming in White-LED Drivers 21 Dec 2016
Application note Inductor Selection in Boost Converters for LCD Backlight Applications 24 Oct 2016
Application note Schottky Diode Selection in Asynchronous Boost Converters 06 Sep 2016
EVM User's guide LM3633 User's Guide 05 Jun 2014

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

LM3633EVM — LM3633EVM Evaluation Module

LM3633EVM Complete Lighting Power Solution for Smartphone Handsets Evaluation Board

User guide: PDF
Not available on TI.com
Driver or library

LM3633SW-LINUX — Linux Driver for LM3633

The Linux driver supports the LM3633 LMU (Lighting Management Unit) device. The Linux driver supports communication through the I2C bus and interfaces with various sub-systems.

 

Linux Mainline Status

Available in Linux Main line: No
Available through git.ti.com: (...)

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Firmware

SNVC166 — USB2ANY Firmware Loader

Supported products & hardware

Supported products & hardware

Products
Backlight LED drivers
LM3633 — Complete lighting power Solution for smartphone handsets
Hardware development
Evaluation board
LM3633EVM — LM3633EVM Evaluation Module USB2ANY — USB2ANY interface adapter
Download
GUI for evaluation module (EVM)

SNVC076 — LM3633EVMSW GUI Installer

Supported products & hardware

Supported products & hardware

Products
Backlight LED drivers
LM3633 — Complete lighting power Solution for smartphone handsets
Hardware development
Evaluation board
LM3633EVM — LM3633EVM Evaluation Module
Download
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

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) 20 View options
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