Texas Instruments LM3561
Synchronous Boost Converter
| Part No. | LM3561 |
|---|---|
| Datasheet | LM3561 Download |
| Manufacturer |  Texas Instruments |
| Description | Synchronous Boost Converter |
| Buy | Stock & Price |
FEATURES
1●2 High-Side Current Source Allows Grounded LED Cathode
● Up to 90% Efficient
● Ultra-Small Solution Size: <16mm2
● Three Operating Modes: Torch, Flash, and LED Indicator
● Accurate and Programmable LED Current from 18mA to 600mA
● Hardware Flash and Torch Enable
● LED Thermal Sensing and Current Scaleback
● Software Selectable Input Voltage Monitor
● Programmable Flash Timeout
● Dual Synchronization Inputs for RF Power Amplifier Pulse Events
● Open and Short LED Detection
● Active High Hardware Enable for Protection Against System Faults
● 400kHz I2C-compatible Interface
● 12-Bump (1.215mm × 1.615mm × 0.6mm) DSBGA Package
APPLICATIONS
● Camera Phone LED Flash Controller● LED Current Source Biasing
DESCRIPTION
The LM3561 is a 2-MHz fixed-frequency currentmode synchronous boost converter. The device is designed to operate as a single 600-mA constant current driver for high-current white LEDs. The highside current source allows for grounded cathode LED operation while the 250-mV regulated headroom voltage ensures that the LED current is well regulated and efficiency remains high.
