High Efficiency 1X/1.5X Fractional
Charge Pump for White LED Applications
General Description
The AAT3131 is a low noise, constant frequency
charge pump DC/DC converter that uses a dual
mode Load Switch (1X) and fractional (1.5X) con-
version to maximize efficiency for White LED appli-
cations. The device can be used to produce cur-
rent levels up to 20mA in three of its outputs, and
30mA in one of its outputs to drive LEDs from a
2.7V to 5.5V input. Outputs may be operated indi-
vidually or paralleled for driving higher-current
LEDs. Low external parts counts (two 1碌F flying
capacitors and two small 1碌F capacitors at V
IN
,
and OUT) make the AAT3131 ideally suited for
small battery-powered applications.
AnalogicTech鈩?s Simple Serial Control鈩?/div>
(S
2
Cwire鈩? interface is used to enable, disable
and set the LED drive current in two groups: the
three 20mA outputs and the single 30mA output
with multiple level logarithmic scales. The AAT3131
has a thermal management system to protect the
device in the event of a short circuit condition at the
output pin. Built-in soft-start circuitry prevents
excessive inrush current during start-up. A high
charge pump switching frequency enables the use
of very small external capacitors. A low current
shutdown feature disconnects the load from V
IN
and reduces quiescent current to less than 1碌A(chǔ).
The AAT3131 is available in very small 12 pin
TSOPJW12 package.
AAT3131
Features
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
ChargePump
鈩?/div>
V
IN
Range: 2.7 - 5.5 Volts
< 1.0碌A(chǔ) of Shutdown current
1.0 MHz Switching Frequency
White LED Backlighting
Fully Independent Display Lighting
Dual Mode 1x and 1.5x Charge Pump for
Maximum Efficiency
Drives Low-V
F
& High-V
F
f Type LED's
Up to three 20mA Outputs
Single 30 mA Output
Multi Position Logarithmic Scale with Digital
Control
Low Noise Constant Frequency Operation
Regulated Output Current
Automatic Soft-Start
No Inductors
-40 to +85擄C Temperature Range
12 pin TSOPJW-12 package
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
White LED Backlighting
White Photo-Flash for DSC's
Color (RGB) Lighting
Programmable Current Source
Typical Application
V
IN
C1+
C1
1碌F
V
OUT
V
BATTERY
C
IN
1碌F
C
OUT
1碌F
C1-
C2+
C2
1碌F
AAT3131
C2-
D1
D2
D3
D4
EN/SET
EN/SET
D5
GND
D4
D3
D2
D1
3131.2004.08.1.1
1
AAT3131ITP-T1相關(guān)型號PDF文件下載
-
型號
版本
描述
廠商
下載
-
英文版
3-Channel Charge-Pump LED Driver
AAT
-
英文版
3-Channel Charge-Pump LED Driver
AAT [Advan...
-
英文版
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
ANALOGICTECH&nb...
-
英文版
Low Cost 1x/2x 4 Channel Charge Pump WLED Driver
ANALOGICTECH
-
英文版
MicroPower⑩ Regulated Charge Pump
ANALOGICTECH
-
英文版
MicroPower⑩ Regulated Charge Pump
ANALOGICTECH&nb...
-
英文版
MicroPower⑩ Regulated Charge Pump
ANALOGICTECH
-
英文版
MicroPower⑩ Regulated Charge Pump
AAT
-
英文版
MicroPower⑩ Regulated Charge Pump
ANALOGICTECH&nb...
-
英文版
500mA High Efficiency Charge Pump for White LED Flash Applic...
ANALOGICTECH
-
英文版
500mA High Efficiency Charge Pump for White LED Flash Applic...
ANALOGICTECH&nb...
-
英文版
High Efficiency 1.5X Fractional Charge Pumps For White LED A...
ANALOGICTECH
-
英文版
High Efficiency 1.5X Fractional Charge Pumps For White LED A...
ANALOGICTECH&nb...
-
英文版
High Efficiency 1.5x Fractional Charge Pump for White LED Ap...
-
英文版
High Efficiency 2X Charge Pump
ANALOGICTECH [A...
-
英文版
3-Channel Charge Pump For White LED Applications
ANALOGICTECH&nb...
-
英文版
High Efficiency 1X/1.5X Fractional Charge Pump for White LED...
ANALOGICTECH
-
英文版
High Efficiency 1X/1.5X Fractional Charge Pump for White LED...
ANALOGICTECH&nb...
-
英文版
High Efficiency 1X/1.5X Fractional Charge Pump for White LED...
ETC
-
英文版
High Efficiency 1X/1.5X Fractional Charge Pump for White LED...
ETC [ETC]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
