Skyworks Solutions, Inc.: LED Camera Flash Driver: AAT1277: AAT1277IUT-T1

Power Electronics Products from CDI

1.5A Step-Up Current Regulator for Flash LEDs
Manufacturer: Skyworks Solutions, Inc.
Status: Standard
Data Sheet: AAT1277IUT-T1 Data Sheet
RoHS Compliance: Skyworks Solutions, Inc., AAT1277IUT-T1, LED Camera Flash Driver, 1.5A Step-Up Current Regulator for Flash LEDs (Rohs Compliant), Component Distributors Inc. (CDI) Yes
Serial Boost
Flash Iout Total:
1500 mA
Movie Mode Iout Total:
100 mA
# LED Channels:
Vin Min:
2.7 V
Vin Max:
5.5 V
Vout Max:
5.5 V
IQ (typ):
230 µA
Shutdown Current:
1 µA
Peak Efficiency:
85 μH
Also Available
Part FunctionPart NumberDescription
Evaluation Board AAT1277IUT-DB1 Skyworks Solutions, Inc. Demo board for AAT1277IUT-T1
The AAT1277 is a high-efficiency, high-current boost converter capable of 1.5A typical output current. It is an ideal power solution for LED photo flash applications in all single cell Li-ion powered products. The AAT1277 maintains output current regulation by switching the internal high-side and low-side switch transistors. The transistor switches are pulse-width modulated at a fixed frequency of 2MHz. The high switching frequency allows the use of a small inductor and output capacitor, making the AAT1277 ideally suited for small battery-powered applications. Three simple logic control inputs enable and disable flash and movie mode operation of the AAT1277. Movie-mode and Flash-mode current levels are independently fixed by two separate resistors. For Flash mode, a default timer can be used either to terminate a flash event or as a safety feature. Also included is a Flash Inhibit pin which reduces the flash current to movie-mode levels during high battery demand. One or two LEDs can be connected to the AAT1277; in the case of two LEDs the output current is matched between each diode. The AAT1277 contains a thermal management system to protect the device in the event of an output short-circuit condition. Built-in circuitry prevents excessive inrush current during start-up. The shutdown feature reduces quiescent current to less than 1.0μA. The AAT1277 is available in a 18 ball 1.5mm x 2.4mm CSP package.
1 - 99 $0.776
100 - 499 $0.631
500 - 2499 $0.592
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Package Format
DescriptionUnits Per FormatAvailable
(T/R) 3000 0