LCSC Electronics logoLCSC Electronics svg logo
Sign In
USD
Cart
TI LM3643AYFFR product image
Images for reference only

TI LM3643AYFFRRoHS

Manufacturer
TI
MPN
LM3643AYFFR
LCSC Part #
C701857
Packaging
DSBGA-12
Customer #
Key Attributes
LM3643 Synchronous Boost Dual LED Flash Driver with 1.5A High-Side Current Source
Datasheetpdf iconTI LM3643AYFFR
In-Stock: 90
90 In stock, ships now
Add to BOM List
QtyUnit PriceTotal Amount
1+$ 0.4149$ 0.41
10+$ 0.4053$ 4.05
30+$ 0.3989$ 11.97
100+$ 0.3941$ 39.41
Standard Packaging3000/Full Reel
Better price for more quantity?
$

Products Specifications

Show similar products (0) >
TypeDescription
CategoryIntegrated Circuits (ICs)/Power Management (PMIC)/LED Drivers ICs
ManufacturerTI
PackagingDSBGA-12
Output Voltage-
FeaturesOver Voltage Protection;Short Circuit Protection;Over-Temperature Protection (OTP)
Frequency - Switching2MHz;4MHz
Switch Tube (Built-In/External)Built-in
Voltage - Input(AC)-
Operating temperature-40℃~+85℃
Number of Channels2
TopologyBoost
TypeDC-DC
Output Current1.5A
Constant Current Accuracy7%
Voltage - Input(DC)2.5V~5.5V
Report an ErrorShow similar products (0) >

Additional Information

TypeDetails
Minimum1
Multiple1
Standard Packaging3000
Sales UnitPiece

Introduction

AI Translation

White LED Flash for Camera Phones The LM3643 is a dual LED flash driver offering high adjustability in a compact solution size. It employs a 2MHz or 4MHz fixed-frequency synchronous boost converter to power a 1.5A constant-current LED source. The LM3643 boost flash driver delivers a total LED current of 1.5A (I_LED1 + I_LED2). Two 128-level current sources provide flexible current ratio adjustment between LED1 and LED2, with each driver capable of supplying up to 1.5A (e.g., I_LED1 = 1.5A and I_LED2 = OFF; I_LED1 = OFF and I_LED2 = 1.5A; or configurations below 1.5A: I_LED1 = 950mA, I_LED2 = 250mA). The adaptive regulation method ensures the current sources remain adjustable while maximizing efficiency. The LM3643 is controlled via an I²C-compatible interface. Features include hardware flash and hardware torch pins (STROBE and TORCH/TEMP), TX signal interrupt, and NTC thermistor monitoring. The device provides independently programmable current on each output pin for driving LEDs in flash mode or video (torch) mode. The device supports switching frequency options of 2MHz or 4MHz, with OVP and adjustable current limiting, enabling the use of miniature ultra-thin inductors and 10μF ceramic capacitors. The operating ambient temperature range is -40°C to +85°C.

Features

AI Translation
  • Total LED current allowed during operation: 1.5A (I_LED1 + I_LED2 = 1.5A)
  • Two independently programmable LED current sources
  • Accurate programmable LED current range: 1.4mA to 1.5A
  • Optimized flash LED current under low battery conditions (Input Voltage Flash Monitor (IVFM))
  • Efficiency >85% in torch mode (at 100mA) and flash mode (at 1A to 1.5A)
  • Supports cathode-to-ground LED operation for improved thermal management
  • Compact solution size: <16mm²
  • Hardware strobe enable (STROBE)
  • Synchronization input for RF power amplifier pulse events (TX)
  • Hardware torch enable (TORCH/TEMP)
  • Remote NTC monitoring (TORCH/TEMP)
  • 400kHz I²C-compatible interface — LM3643 (I²C address = 0x63), LM3643A (I²C address = 0x67)