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背光 LED 驅動器

LM3630A

現行

LM3630A 高效雙串列白光 LED 驅動器

立即訂購
產品規格表

LM3630A

現行
產品規格表 立即訂購

產品詳細資料

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 (— mm × — mm)
  • 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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重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM3630A High-Efficiency Dual-String White LED Driver datasheet (Rev. B) PDF | HTML 2015/10/27
白皮書 Common LED Functions and LED Driver Design Considerations 2020/9/21

設計與開發

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開發板

LM3630EVM — LM3630EVM 高效率雙燈串白光 LED 驅動器評估模組

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.
使用指南: PDF
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驅動程式或資料庫

LM3630ASW-LINUX — 適用於 LM3630A 的 Linux 驅動程式

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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參考設計

TIDA-00220 — 適用於系統喚醒及中斷的電容式人體近距離偵測參考設計

此參考設計運用我們的電容轉數位轉換器技術，提供高精密度方法，可在發生人體互動時喚醒系統。TIDA-00220 展示替代感測器設計、環境補償與電磁干擾防護的技術。

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參考設計

TIDA-00373 — 透過環境光與近距感測器執行背光及智慧照明控制的參考設計

此系統可根據環境光亮度動態調整背光亮度，從而節省電力並延長背光壽命。  當使用者靠近時，電容式接近感測器會喚醒系統，以節省更多電力。

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參考設計

TIDA-00754 — 基於環境光和雜訊抗擾近距感測器的智慧照明和背光控制參考設計

此參考設計展示了適用於 HMI 應用的近距感測器實作。此設計可用於背光控制，其可根據環境光線亮度動態調整 LCD 背光亮度。電容式近距感測器可在有人接近時喚醒系統，從休眠或待機模式恢復運作，以節能並延長 LCD 背光壽命。

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DSBGA (YFQ) 12 Ultra Librarian
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