AAT3193 Datasheet, PDF (1/18 Pages) Advanced Analogic Technologies – 3-Channel Charge-Pump LED Driver

ChargePump^TM
General Description
The AAT3193 is a charge-pump based, current-sink
white LED driver capable of driving one to three LEDs up
to 30mA, each. It automatically switches between 1x
mode and 2x mode to maintain the highest efficiency
and optimal LED current accuracy and matching.
The AAT3193 charge pump’s 1x mode (bypass mode)
has very low resistance allowing LED current regulation
to be maintained with input supply voltage approaching
the LED forward voltage.
The AAT3193 is available in a 2x2mm, 10-lead SC70JW-10
package.
PRODUCT DATASHEET
AAT3193
3-Channel Charge-Pump LED Driver
Features
• Drives up to 3 LEDs at up to 30mA, each
• Automatic Switching Between 1x and 2x Modes
• 0.9MHz Switching Frequency
• Linear LED Output Current Control
▪ Single-wire, S²Cwire Interface
• AAT3193-1: 16-step
• AAT3193-2: 8-step
• AAT3193-3: 4-step
▪ ON/OFF or PWM Interface
• AAT3193-4
• ±10% LED Output Current Accuracy
• ±3% LED Output Current Matching
• Low-Current Shutdown Mode
• Built-in Thermal Protection
• Automatic Soft-Start
• Available in 2x2mm SC70JW-10 Package
Applications
• Entry Level Cordless Phone Handsets
• Entry Level Digital Cameras
• Entry Level Mobile Phone Handsets
• Entry Level MP3 and PMP Players
Typical Application
Input Voltage
2.7V to 5.5V
CIN
1μF
CP
1μF
EN/SET
S²Cwire
Interface
R SET
14.3kΩ
IN
C+
OUT
AAT 3193 -1
C-
EN/SET
D1
D2
RSET
D3
GND
COUT
1μF
WLEDs
OSRAM LW M 678
or equivalent
3193.2008.07.1.3
www.analogictech.com
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