AS1111 Datasheet, PDF (1/22 Pages) ams AG – Low–Dropout LED Drivers

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 I_SET (per LED, typ) at an LED
cathode voltage (V_SAT) of 150mV and 650 x I_SET (typ) at a V_SAT
of 1V, where I_SET is the current through RSET connected to pin
CTRL.
The AS1111B & AS1111C LED currents are
230 x I_SET (per LED, typ) at a V_SAT of 150mV and 325 x I_SET (typ)
at a V_SAT 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