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AS1111

ams
Part Number AS1111
Manufacturer ams
Description Low-Dropout LED Drivers
Published Feb 19, 2016
Detailed Description AS1111 Low–Dropout LED Drivers General Description The AS1111A/AS1111B/AS1111C are LED drivers designed to match curre...
Datasheet PDF File AS1111 PDF File

AS1111
AS1111

Overview
AS1111 Low–Dropout LED Drivers General Description The AS1111A/AS1111B/AS1111C are LED drivers designed to match current source bias for any color LED, including white and blue.
The devices can drive up to 4 high-current LEDs, and the LED current is programmable using an external resistor (RSET).
The AS1111A LED currents are 460 x ISET (per LED, typ) at an LED cathode voltage (VSAT) of 150mV and 650 x ISET (typ) at a VSAT of 1V, where ISET is the current through RSET connected to pin CTRL.
The AS1111B & AS1111C LED currents are 230 x ISET (per LED, typ) at a VSAT of 150mV and 325 x ISET (typ) at a VSAT of 1V.
All AS1111 versions incorporate a chip-enable feature via pin EN.
When the devices are disabled, the supply current drops down to less than 1μA.
The AS1111A and AS1111B are available in a 6-pin WL-CSP package with 0.
4mm pitch.
The AS1111C is available in an 8-pin MLPD (2x2mm) package with 0.
5mm pitch.
Ordering Information and Content Guide appear at end of datasheet.
Figure 1: Added Value of Using AS1111 Key Benefits & Features The benefits and features of AS1111, Low–Dropout LED Drivers are listed below: High efficient Benefits Supports a variety of end applications Extended battery life Suitable for EMF sensitive environment Small PCB area Cost effective, small package Features • Ultra Low Voltage Drop: less than 150mV • Analog and PWM Brightness Control • Up to 80mA per LED (AS1111A) • Up to 40mA per LED (AS1111B, AS1111C) • Active-Low Shutdown Mode • Low Shutdown Current: less than 1μA • No electromagnetic interference • No switching noise • Less external components needed • 6-pin WL-CSP with 0.
4mm pitch • 8-pin MLPD (2x2mm) with 0.
5mm pitch ams Datasheet [v1-06] 2015-Apr-07 Page 1 Document Feedback Page 2 Document Feedback AS1111 − GeneralDescription Applications The AS1111 devices are ideal for LED displays and keyboard backlights, as well as lighting management units for battery powered audio devices such as • MP3 and CD players, • Mobile an...


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