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照明 LED 驅動器

LM3642

現行

具高壓側電流的 1.5A 同步升壓 LED 閃光燈驅動器

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產品規格表

LM3642

現行
產品規格表 立即訂購

產品詳細資料

Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.5 Iq (typ) (mA) 0.75 Features Input/Output Isolation, OVP, Over Current Protection, Synchronous Rectification Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
Input voltage type DC/DC Topology Boost, current mode Vin (min) (V) 2.5 Vin (max) (V) 5.5 Vout (max) (V) 5.5 Vout (min) (V) 2.5 Iout (max) (A) 1.5 Iq (typ) (mA) 0.75 Features Input/Output Isolation, OVP, Over Current Protection, Synchronous Rectification Operating temperature range (°C) -40 to 85 Dimming method Analog, PWM Number of channels 1 Rating Catalog
DSBGA (YZR) 9 3.0625 mm² 1.75 x 1.75
  • 1.5-A High-Side Current Source for Single LED
  • > 85% Efficiency in Torch Mode (at 100 mA) and
    Flash Mode (at 1 A to 1.5 A)
  • Accurate Programmable Flash LED Current from
    93 mA to 1.5 A
  • Accurate Programmable Torch LED Currents:
    • 48.4 mA to 375 mA
    • 24 mA to 187 mA (LT option)
  • Small Solution Size: < 20 mm2
  • Soft-Start Operation for Battery Protection
  • Hardware Strobe Enable
  • Synchronization Input for RF Power Amplifier
    Pulse Events
  • VIN Flash Monitor Optimization
  • 400-kHz I2C-Compatible Interface
  • 0.5-mm Pitch, 9-Bump DSBGA
  • 1.5-A High-Side Current Source for Single LED
  • > 85% Efficiency in Torch Mode (at 100 mA) and
    Flash Mode (at 1 A to 1.5 A)
  • Accurate Programmable Flash LED Current from
    93 mA to 1.5 A
  • Accurate Programmable Torch LED Currents:
    • 48.4 mA to 375 mA
    • 24 mA to 187 mA (LT option)
  • Small Solution Size: < 20 mm2
  • Soft-Start Operation for Battery Protection
  • Hardware Strobe Enable
  • Synchronization Input for RF Power Amplifier
    Pulse Events
  • VIN Flash Monitor Optimization
  • 400-kHz I2C-Compatible Interface
  • 0.5-mm Pitch, 9-Bump DSBGA

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.

The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.

The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.

The LM3642 is a 4-MHz fixed-frequency synchronous boost converter plus 1.5-A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing Flash current up to 1.5 A. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.

The LM3642 is controlled via an I2C-compatible interface. Features include a hardware flash enable (STROBE) allowing a logic input to trigger the flash pulse as well as a TX input which forces the flash pulse into a low-current Torch Mode, allowing for synchronization to RF power amplifier events or other high-current conditions.

The 4-MHz switching frequency, overvoltage protection and adjustable current limit settings allow the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device is available in a small 9-bump DSBGA package and operates over the −40°C to 85°C temperature range.
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類型 標題 日期
* Data sheet LM3642 1.5-A Synchronous Boost LED Flash Driver With High-Side Current Source datasheet (Rev. H) PDF | HTML 2015年 9月 4日
Application note No Boost Inductor Design with LM364x for Long-Time Focusing in Camera Module PDF | HTML 2022年 2月 16日
White paper Common LED Functions and LED Driver Design Considerations 2020年 9月 21日
Selection guide Power Management Guide 2018 (Rev. R) 2018年 6月 25日
Application note LED Flash-Protection Features 2017年 8月 23日
EVM User's guide LM3642 Evaluation Board (Rev. A) 2013年 4月 30日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM3642TL-LTEVM — 具有高壓側電流的 LM3642 1.5A 同步升壓 LED 閃光燈驅動器評估模組板

1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board

The LM3642TL-LT is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)
使用指南: PDF
TI.com 無法提供
開發板

LM3642TLEVM — 具有高壓側電流的 LM3642 1.5A 同步升壓 LED 閃光燈驅動器評估模組板

1.5A Synchronous Boost LED Flash Driver w/ High-Side Current Evaluation Module Board

The LM3642TL is a 4MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. The high-side current source allows for grounded cathode LED operation providing (...)
使用指南: PDF
TI.com 無法提供
驅動程式或資料庫

LM3642SW-LINUX — 適用於 LM3642 的 Linux 驅動程式

The Linux driver supports the LM3642 LED Flash Driver. The Linux driver supports communication through the I2C bus and interfaces with the LED sub-system.

 

Linux Mainline Status

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

Supported Devices:

  • lm3642

 

Linux Source Files

The files (...)

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模擬型號

LM3642 Unencrypted PSpice Transient Model Package (Rev. B)

SNVM510B.ZIP (47 KB) - PSpice Model
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模擬工具

PSPICE-FOR-TI — PSpice® for TI 設計與模擬工具

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 (YZR) 9 檢視選項
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