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LM3648YFFR датащи(PDF) 1 Page - Texas Instruments |
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LM3648YFFR датащи(HTML) 1 Page - Texas Instruments |
1 / 38 page IN HWEN LM3648 SDA SCL SW OUT LED STROBE TORCH/ TEMP GND TX 10 2F 10 2F C2 L1 C1 D1 2P/2C VIN 2.5V J 5.5V 1 2H Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3648, LM3648TT SNVSA68B – OCTOBER 2014 – REVISED SEPTEMBER 2015 LM3648 Synchronous Boost LED Flash Driver with 1.5-A High-Side Current Source 1 Features 3 Description The LM3648 is an LED flash driver that provides a 1 • 1.5-A LED Current Source Programmability high level of adjustability within a small solution size. • Accurate and Programmable LED Current Range The LM3648 utilizes a 2-MHz or 4-MHz fixed- from 1.954 mA to 1.5 A frequency synchronous boost converter to provide • Torch Currents up to 500 mA (LM3648TT) power to the 1.5-A constant current LED source. An adaptive regulation method ensures the current • Flash Timeout Values up to 1.6 Seconds source remains in regulation and maximizes (LM3648TT) efficiency. • Optimized Flash LED Current During Low Battery Features of the LM3648 are controlled via an I2C- Conditions (IVFM) compatible interface. These features include: • > 85% Efficiency in Torch Mode (at 100 mA) and hardware flash and hardware torch pins (STROBE Flash Mode (at 1 A to 1.5 A) and TORCH/TEMP), a TX interrupt, and an NTC • Grounded Cathode LED Operation for Improved thermistor monitor. The device offers 64 Thermal Management programmable currents in Flash and 128 levels in Movie Mode (Torch) condition. • Small Solution Size: < 16 mm2 • Hardware Strobe Enable (STROBE) The 2-MHz or 4-MHz switching frequency options, overvoltage protection (OVP), and adjustable current • Synchronization Input for RF Power Amplifier limit allow for the use of tiny, low-profile inductors and Pulse Events (TX) (10-µF) ceramic capacitors. The device operates over • Hardware Torch Enable (TORCH/TEMP) a –40°C to +85°C ambient temperature range. • Remote NTC Monitoring (TORCH/TEMP) Device Information(1) • 400-kHz I2C-Compatible Interface PART NUMBER PACKAGE BODY SIZE (MAX) – LM3648 (I2C Address = 0x63) LM3648 DSBGA (12) 1.69 mm x 1.31 mm 2 Applications (1) For all available packages, see the orderable addendum at the end of the data sheet. Camera Phone White LED Flash Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Аналогичный номер детали - LM3648YFFR |
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Аналогичное описание - LM3648YFFR |
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