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LM3630A

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LM3630A high-efficiency dual-String white LED driver

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Data sheet

LM3630A

ACTIVE
Data sheet Order now

Product details

Number of channels 2 Vin (min) (V) 2.3 Vin (max) (V) 5.5 Vout (min) (V) 12 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1120 Duty cycle (max) (%) 94 LED current per channel (mA) 28.5 Peak efficiency (%) 87 Topology Boost Features I2C control, OVP, PWM control, Soft Start, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
Number of channels 2 Vin (min) (V) 2.3 Vin (max) (V) 5.5 Vout (min) (V) 12 Vout (max) (V) 40 Type Inductive Switching frequency (max) (kHz) 1120 Duty cycle (max) (%) 94 LED current per channel (mA) 28.5 Peak efficiency (%) 87 Topology Boost Features I2C control, OVP, PWM control, Soft Start, Thermal shutdown Operating temperature range (°C) -40 to 85 Rating Catalog
DSBGA (YFQ) 12 2.52000000000000018 mm² 1.8 x 1.4000000000000001
  • Drives up to 2 Strings of 10 Series LEDs
  • Wide 2.3-V to 5.5-V Input Voltage Range
  • Up to 87% Efficient
  • 8-bit I2C-Compatible Programmable Exponential or Linear Brightness Control
  • PWM Brightness Control for CABC Operation
  • Independent Current Control per String
  • True Shutdown Isolation for LEDs
  • Internal Soft-Start Limits Inrush Current
  • Adaptive Headroom
  • Programmable 16-V/24-V/32-V/40-V Overvoltage Protection
  • Selectable Boost Frequency of 500 kHz or 1 MHz with Optionally Additional Offset
  • Low Profile 12-Pin DSBGA Package
  • Solution Size 32 mm²
  • Drives up to 2 Strings of 10 Series LEDs
  • Wide 2.3-V to 5.5-V Input Voltage Range
  • Up to 87% Efficient
  • 8-bit I2C-Compatible Programmable Exponential or Linear Brightness Control
  • PWM Brightness Control for CABC Operation
  • Independent Current Control per String
  • True Shutdown Isolation for LEDs
  • Internal Soft-Start Limits Inrush Current
  • Adaptive Headroom
  • Programmable 16-V/24-V/32-V/40-V Overvoltage Protection
  • Selectable Boost Frequency of 500 kHz or 1 MHz with Optionally Additional Offset
  • Low Profile 12-Pin DSBGA Package
  • Solution Size 32 mm²

The LM3630A is a current-mode boost converter which supplies the power and controls the current in up to two strings of 10 LEDs per string. Programming is done over an I2C-compatible interface. The maximum LED current is adjustable from 5 mA to 28.5 mA. At any given maximum LED current the LED brightness is further adjusted with 256 exponential or linear dimming steps. Additionally, pulsed width modulation (PWM) brightness control can be enabled allowing for LED current adjustment by a logic level PWM signal.

The boost switching frequency is programmable at 500 kHz for low switching loss performance or 1 MHz to allow the use of tiny low-profile inductors. A setting for a 10% offset of these frequencies is available. Overvoltage protection is programmable at 16 V,
24 V, 32 V, or 40 V to accommodate a wide variety of LED configurations and Schottky diode/output capacitor combinations.

The device operates over a 2.3-V to 5.5-V operating voltage range and –40°C to +85°C ambient temperature range. The LM3630A is available in an ultra-small 12-bump DSBGA package.

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

The LM3630A is a current-mode boost converter which supplies the power and controls the current in up to two strings of 10 LEDs per string. Programming is done over an I2C-compatible interface. The maximum LED current is adjustable from 5 mA to 28.5 mA. At any given maximum LED current the LED brightness is further adjusted with 256 exponential or linear dimming steps. Additionally, pulsed width modulation (PWM) brightness control can be enabled allowing for LED current adjustment by a logic level PWM signal.

The boost switching frequency is programmable at 500 kHz for low switching loss performance or 1 MHz to allow the use of tiny low-profile inductors. A setting for a 10% offset of these frequencies is available. Overvoltage protection is programmable at 16 V,
24 V, 32 V, or 40 V to accommodate a wide variety of LED configurations and Schottky diode/output capacitor combinations.

The device operates over a 2.3-V to 5.5-V operating voltage range and –40°C to +85°C ambient temperature range. The LM3630A is available in an ultra-small 12-bump DSBGA package.

For all available packages, see the orderable addendum at the end of the data sheet.
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Technical documentation

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* Data sheet LM3630A High-Efficiency Dual-String White LED Driver datasheet (Rev. B) PDF | HTML 27 Oct 2015
White paper Common LED Functions and LED Driver Design Considerations 21 Sep 2020

Design & development

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

Evaluation board

LM3630EVM — LM3630EVM High-Efficiency Dual-String White LED Driver Evaluation Module

The LM3630EVM is a current mode boost converter 2which supplies the power and USB interface control for two strings of 10 LEDs per string. Max LED current is adjustable from 5 mA to 28.5 mA additional LED brightness further adjustable with 256 exponential or linear dimming steps.
User guide: PDF
Not available on TI.com
Driver or library

LM3630ASW-LINUX — Linux Driver for LM3630A

The Linux driver supports the LM3630A White LED Driver. The Linux driver supports communication through the I2C bus and interfaces with the backlight sub-system.

 

Linux Mainline Status

Available in Linux Main line: Yes
Available through git.ti.com: N/A

Supported Devices:

  • lm3630a

 

Linux Source Files

The (...)


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Design guide: PDF
Schematic: PDF
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TIDA-00754 — Smart lighting & backlight control by ambient light & noise-immune proximity sensor reference design

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Schematic: PDF
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TIDA-00220 — Capacitive-Based Human Proximity Detection for System Wake-Up & Interrupt Reference Design

This reference design uses our capacitive-to-digital converter technology to provide a high-precision method to wake up systems when human interaction occurs. TIDA-00220 demonstrates techniques for an alternative sensor design, environmental compensation and electromagnetic interference protection.
Design guide: PDF
Schematic: PDF
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DSBGA (YFQ) 12 Ultra Librarian
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