Skyworks Solutions, Inc.: LED Camera Flash Driver: AAT1271: AAT1271IWO-T1

Power Electronics Products from CDI

1.5A Step-Up Current Regulator for Flash LEDs TDFN33-14
Manufacturer: Skyworks Solutions, Inc.
Status: Standard
Data Sheet: AAT1271IWO-T1 Data Sheet
RoHS Compliance: Skyworks Solutions, Inc., AAT1271IWO-T1, LED Camera Flash Driver, 1.5A Step-Up Current Regulator for Flash LEDs TDFN33-14 (Rohs Compliant), Component Distributors Inc. (CDI) Yes
Serial Boost
Flash Iout Total:
1500 mA
Movie Mode Iout Total:
206 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 AAT1271IWO-DB1 Skyworks Solutions, Inc. Demo board for AAT1271IWO-T1
The AAT1271 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 AAT1271 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 AAT1271 ideally suited for small battery-powered applications. AnalogicTech’s proprietary AS²Cwire™ (Advanced Simple Serial Control™) serial digital interface is used to enable, disable, configure, and program the operation of the AAT1271. Using the AS²Cwire interface, the movie-mode current level for each LED, the safety timer delay, and the flash-to-movie-mode current ratio can be programmed to one of 16 levels. In addition, the single-wire serial protocol sets output channel control. The AAT1271 also includes a separate Flash Enable input to initiate both the flash operation and the default timer which can be used either to terminate a flash event at the end of a user-programmed delay 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. The maximum flash and movie-mode current is set by one external resistor where the ratio of Flash to Movie-mode current is set at approximately 7.3:1. One or two LEDs can be connected to the AAT1271, where in the case of two LEDs the output current is matched between each diode. The AAT1271 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 AAT1271 is available in a Pb-free, thermally-enhanced 14-pin 3x3mm TDFN package.
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Package Format
DescriptionUnits Per FormatAvailable
(T/R) 1500 0