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BCT3146
High Efficiency Synchronous Boost Converter With Dual Independent 2.0 A Current Sources
BCT3146
High Efficiency Synchronous Boost Converter With Dual Independent 2.0 A Current Sources
GENERAL DESCRIPTION
The BCT3146 is a dual LED flash driver that provides a high level of adjustability within a small solution size. The BCT3146 utilizes a 2MHz or 4MHz fixed frequency synchronous boost converter to provide power to the dual 2A constant current LED sources. The total LED current the BCT3146 boost can deliver is 2A (ILED1+ ILED2). The dual 128 level current sources provide the flexibility to adjust the current ratios between LED1 and LED2 with each driver capable of delivering a maximum of 2A. An adaptive regulation met hod ensures the current sources remain in regulation and maximizes efficiency.
Features of the BCT3146 are controlled via an I2C comp atible 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 independently programmable currents in each output leg to drive the LEDs in a Flash or Movie Mode (Torch) condition.
The 2MHz or 4MHz switching frequency options, over voltage protection (OVP), and adju stable 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.
APPLICATIONS
Camera Phone White LED Flash
FEATURES
2A Total Allowed LED Current During Operation
Dual Independent LED Current Source Programmability
Accurate and Programmable LED Current Range from 3.9mA to 2A
Optimized Flash LED Current During Low Battery Conditions (IVFM)
Grounded Cathode LED Operation for Improved Thermal Management
Small 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)
400-kHz I2C-Compatible Interface
-BCT3146(I2C Address=0x63)
-40℃ to +85℃ Operating Temperature Range
Available in Green WLCSP-12L Packages
ORDERING INFORMATION
Order Number | Package Type | Temperature Range | Marking | QTY/Reel |
BCT3146EWC-TR | WLCSP-12L | -40°C to +85°C | DKW XXXXX | 3000 |
1. "DKW" in Marking is product short code forBCT3146EWC-TR
2. "XXXXX" in Marking will be appeared as the batch code.
