Texas Instruments LM3559
The LM3559 is a 2-MHz fixed-frequency synchronous boost converter with two 900-mA constant current drivers for high-current white LEDs. The dual highside current sources allow for grounded cathode LED operation and can be tied together for providing flash currents of up to 1.8 A. The LM3559 is controlled via an I2C-compatible interface.| Part No. | LM3559 |
|---|---|
| Datasheet | LM3559 Download |
| Manufacturer |  Texas Instruments |
| Description | Synchronous Boost Flash Driver |
| Buy | Stock & Price |
FEATURES
●1 Dual High-Side Current Sources Allow for Grounded Cathode LED Operation● Accurate and Programmable LED Current from 28.125 mA to 1.8 A
● Optimized Flash Current During Low Battery Conditions
● Independent LED Current Source Programmability
● Four Operating Modes: Torch, Flash, Privacy Indicate, and Message Indicator
● 4-Bit Analog-to-Digital (ADC) for VLED Monitoring
● Battery Voltage Sensing and Current Scale-Back
● LED Sensing and Current Scale-Back
● Hardware Flash and Torch Enable
● Active-Low Hardware Reset
● Dual Synchronization Inputs for RF Power Amplifier Pulse Events
● LED and Output Disconnect During Shutdown
● Open and Short LED Detection
● 400-kHz I2C-Compatible Interface 2
APPLICATIONS
● Camera Phone LED Flash● White LED Biasing Simplified Schematic 3
DESCRIPTION
An adaptive regulation method ensures the current for each LED remains in regulation and maximizes efficiency.FEATURES
include: an internal 4-bit ADC to monitor the LED voltage, independent LED cur...
