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AAT3103IJQ-2-T1 Datasheet

  • AAT3103IJQ-2-T1

  • 3-Channel Charge-Pump LED Driver

  • 1059.33KB

  • 17頁

  • AAT

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PRODUCT DATASHEET
AAT3103
ChargePump
TM
General Description
The AAT3103 is a constant frequency charge-pump based
current-source white LED driver capable of driving one to
three LEDs up to 30mA, each. The charge pumps auto-
matically switch between 1x mode and 2x mode to main-
tain the highest efficiency and optimal LED current accu-
racy and matching. A low external parts count (one 1渭F
flying capacitor, two small 1渭F capacitors at IN and OUT
and one current setting resistor) makes the AAT3103 ide-
ally suited for small battery-powered applications.
The AAT3103-1/-2 uses AnalogicTech's Simple Serial
Control鈩?(S
2
Cwire鈩? interface to enable, disable, and
program the LED driving current. The AAT3103-4 employs
a Pulse Width Modulation (PWM) signal with up to 50kHz
frequency, 10% to 100% duty cycle to program the LED
current. A low-current shutdown feature disconnects the
load from IN and reduces quiescent current to less than
1渭A. Built-in soft-start circuitry prevents excessive inrush
current during start-up. Integrated short circuit and ther-
mal protection circuitry protects the device from damage.
The AAT3103 is available in a 2x2.1mm thermally
enhanced Pb-free 10-lead SC70JW-10 package.
3-Channel Charge-Pump LED Driver
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Source WLED Driver, up to 3 LEDs at up to 30mA, each
Automatic Switching Between 1x and 2x Modes
900KHz Switching Frequency
Linear LED Output Current Control
鈻?/div>
Single-wire, S
2
Cwire Interface
AAT3103-1: 16-step
AAT3103-2: 8-step
鈻?/div>
ON/OFF or PWM Interface
AAT3103-4
鹵10% LED Output Current Accuracy
鹵3% LED Output Current Matching
Low-current Shutdown Mode
Built-in Short Circuit and Thermal Protection
Automatic Soft-start
2x2.1mm SC70JW-10 Package
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Cordless Phone Handsets
Mobile Phone Handsets
MP3 and PMP Players
Digital Cameras
Typical Application
Input Voltage
2.7V to 5.5V
C
IN
1渭F
IN
C+
OUT
C
P
1渭F
AAT3103-1
C-
C
OUT
1渭F
EN/SET
S
2
Cwire
Interface
EN/SET
D1
D2
RSET
D3
R
SET
14.3k惟
AGND
WLEDs
OSRAM LW M 678
or equivalent
3103.2008.03.1.0
www.analogictech.com
1

AAT3103IJQ-2-T1相關(guān)型號PDF文件下載

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