AAT3172
High Current LED Flash Driver Charge Pump IC
General Description
The AAT3172 is a high output current, high effi-
ciency, low noise, low profile charge pump DC/DC
converter, ideal for multi-function LED photo-flash
applications where solution cost, size, and efficien-
cy are critical.
The dual charge pump in the AAT3172 is capable
of delivering 600mA peak output current. Two cur-
rent-controlled paths are available for users of dual
flash LEDs that prefer current matching. Each LED
channel can be easily programmed in 32 steps with
a single GPIO output through the AS
2
Cwire鈩?/div>
(Advanced Simple Serial Control鈩? interface. This
allows smooth transitions and flexible adjustment
of brightness in flash or other lighting modes.
The tri-mode (1X/1.5X/2X) operation of the internal
charge pump offers excellent power efficiency for
both flash and movie modes. Combined with a low
external parts count (two 1碌F flying capacitors and
one small bypass capacitor at V
IN
and OUT), the
AAT3172 is ideally suited for small, battery-powered
applications.
The AAT3172 has a thermal management system to
protect the device in the event of a short-circuit con-
dition at the output pin. Built-in soft-start circuitry
prevents excessive inrush current during start-up.
The shutdown feature disconnects the load from V
IN
and reduces quiescent current to less than 1.0碌A(chǔ).
The AAT3172 is available in the Pb-free, thermally-
enhanced, 12-pin 3x3 TDFN package.
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>
ChargePump
鈩?/div>
V
IN
Range: 2.7V to 5.5V
600mA Peak Output Current
Tri-Mode 1X/1.5X/2X in Current Mode
Voltage Mode Operation: 1.5X, 100mA
Dual Regulated Current Sinks
Current Match Between Current Sinks
32 Current Steps Set by AS
2
Cwire
1碌F Input, Output, and Flying Capacitors
<1.0碌A(chǔ) of Shutdown
Small Application Circuit
No Inductors
Automatic Soft Start
12-Pin TDFN 3x3 Package
-40擄C to +85擄C Temperature Range
Applications
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Camera Phones
Digital Still Cameras (DSCs)
PDAs and Notebook PCs
Smart Phones
Typical Application
C1
1碌F
C2
1碌F
C1+
2.7V to 5.5V
C
IN
4.7碌F
C1- C2+
C2-
V
OUT
V
IN
AAT3172
C
OUT
2.2碌F
Flash
LED 1
Flash
LED 2
F1
EN/SET
EN/SET
GND
F2
3172.2005.11.1.1
1
AAT3172相關(guān)型號(hào)PDF文件下載
-
型號(hào)
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
15
