1.5A Single Flash LED Driver IC/High Current Boost Converter: AAT1274Source: Skyworks Solutions, Inc.
The AAT1274 is a LED Driver/High Current Boost Converter ideal for LED photo flash/torch, camera enabled mobile devices, cellphones/smartphones, digital still cameras, and other LED photo flash applications, and single cell, Li-ion powered applications.
This boost converter maintains output current regulation by switching the internal high-side and low-side switch transistors with pulse-width modulation at a fixed frequency of 2 MHz. A high switching frequency allows for the use of a small external inductor and output capacitor. The LED Driver/Boost Converter features an input voltage range of 2.7V to 5.5V, a single channel flash output, up to 1.5A regulated output current, up to 88% efficiency, 2 MHz switching frequency, and more. Additional features include:
• Separate Flash Enable
• Single Resistor Sets Flash and Movie Mode Current
AS2Cwire Single Wire Programming:
- Movie Mode Current
- Flash/Movie Mode Current Ratio
• True Load Disconnect
• Soft-Start and Input Current Limit
• Over-Voltage (Open LED, Open Circuit), Short Circuit, and Over-Temperature Protection
• -40°C to +85°C Temperature Range
• TDFN33-14 Package