The LM3648 is an LED flash driver that provides a high level of adjustability within a small solution size. The LM3648 utilizes a 2-MHz or 4-MHz fixed-frequency synchronous boost converter to provide power to the 1.5-A constant current LED source. An adaptive regulation method ensures the current source remains in regulation and maximizes efficiency.
Features of the LM3648 are controlled via an I2C-compatible interface. These features include: hardware flash and hardware torch pins (STROBE and TORCH/TEMP), a TX interrupt, and an NTC thermistor monitor. The device offers 64 programmable currents in Flash and 128 levels in Movie Mode (Torch) condition.
The 2-MHz or 4-MHz switching frequency options, overvoltage protection (OVP), and adjustable current limit allow for the use of tiny, low-profile inductors and (10-µF) ceramic capacitors. The device operates over a –40°C to +85°C ambient temperature range.
For all available packages, see the orderable addendum at the end of the data sheet.| Typ | Titel | Datum | ||
|---|---|---|---|---|
| * | Data sheet | LM3648 Synchronous Boost LED Flash Driver with 1.5-A High-Side Current Source datasheet (Rev. D) | PDF | HTML | 18 Nov 2016 |
| Application note | No Boost Inductor Design with LM364x for Long-Time Focusing in Camera Module | PDF | HTML | 16 Feb 2022 | |
| White paper | Common LED Functions and LED Driver Design Considerations | 21 Sep 2020 | ||
| Application note | LED Flash-Protection Features | 23 Aug 2017 | ||
| Application note | Using Flash LED Drivers for Infrared (IR) LED Applications | 20 Mär 2017 | ||
| Application note | Using the LM3643/4/8 in an Inductorless and/or Simplified PCB Routing Configurat | 11 Okt 2016 | ||
| Technical article | Shrink your LED flash solution | PDF | HTML | 10 Dez 2015 | |
| EVM User's guide | Using the LM3648EVM Evaluation Module | 26 Jan 2015 |
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The LM3648EVM aids in evaluation of the LM3648 Synchronous Boost LED Flash Driver W/ 1.5A High-Side Current Source. The 2/4 MHz synchronous boost provides power to the controllable high side current sourcs. The current source can provide a current up to 1.5A with 64 programmable levels (...)
| Gehäuse | Pins | Herunterladen |
|---|---|---|
| DSBGA (YFF) | 12 | Optionen anzeigen |
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