|
|
PDF AAT3155 Data sheet ( Hoja de datos )
| Número de pieza | AAT3155 | |
| Descripción | High Efficiency 1X/1.5X/2X Charge Pump | |
| Fabricantes | AAT | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de AAT3155 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
|
No Preview Available !
www.DataSheet4U.com
AAT3155
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
General Description
Features
ChargePump™
The AAT3155 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-
mode load switch (1X), fractional (1.5X), and dou-
bling (2X) conversion to maximize efficiency for
white LED applications. The AAT3155 is capable of
driving up to four channels of LEDs at 20mA per
channel from a 2.7V to 5.5V input. The current
sinks may be operated individually or in parallel for
driving higher current LEDs. A low external parts
count (two 1µF flying capacitors and two small 1µF
capacitors at IN and OUTCP) make this part ideal-
ly suited for small, battery-powered applications.
AnalogicTech's S2Cwire™ (Simple Serial Control™)
serial digital input is used to enable, disable, and set
current for each LED with 16 settings down to 50μA.
The low-current mode supply current can be as low
as 50μA to save power.
Each output of the AAT3155 is equipped with built-
in protection for output short-circuit and auto-dis-
able for load short-circuit conditions. Built-in soft-
start circuitry prevents excessive inrush current
during start-up. A low-current shutdown feature dis-
connects the load from the input and reduces qui-
escent current to less than 1μA.
The AAT3155 is available in a Pb-free, space-sav-
ing 2.85x3.0mm 12-pin TSOPJW package.
• VIN Range: 2.7V to 5.5V
• Fully Programmable Current with Single Wire
— 16 Current Levels
— Four Low Current Settings Down to 50µA
• Low IQ (50µA) for Low Current Mode
• Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and VF Coverage
• Drives up to Four Channels of LEDs
• No Inductors, Low Noise Operation
• 1MHz Constant Switching Frequency
• Small Application Circuit
• Built-In Thermal Protection
• Automatic Soft Start
• IQ <1µA in Shutdown
• 2.85x3.0mm TSOPJW-12 Package
Applications
• Color (RGB) Lighting
• Programmable Current Sinks
• White LED Backlighting
• White Photo Flash for Digital Still Cameras
Typical Application
C1
1µF
2.7V to 5.5V
CIN
1µF
EN/SET
C1+ C2+
C1- C2-
IN OUTCP
AAT3155
GND
EN/SET
D1
D2
D3
D4
C2
1µF
D1 D2 D3 D4
COUT
1µF
3155.2006.05.1.1
1
1 page  
www.DataSheet4U.com
AAT3155
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Typical Characteristics
CIN = COUT = C1 = C2 = 1.0µF; TA = 25°C, VIN = 3.6V, unless otherwise noted.
Efficiency vs. Supply Voltage
100
5mA/ch
90 VF = 3V
80
70
60
50
40
30
2.7 2.9 3.1
500µA/ch
VF = 2.7V
3.3 3.5 3.7 3.9
Supply Voltage (V)
20mA/ch
VF = 3.4V
4.1 4.3 4.5
EN
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(100mA/div)
Turn-On to 1X Mode
(VIN = 4.2V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
VOUT
(2V/div)
VSINK
(1V/div)
IIN
(200mA/div)
Turn-On to 1.5X Mode
(VIN = 3.5V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
VOUT
(2V/div)
VSINK
(500mV/div)
IIN
(200mA/div)
Turn-On to 2X Mode
(VIN = 2.8V; 20mA Load)
Time (200μs/div)
EN
(2V/div)
VF
(1V/div)
IIN
(100mA/div)
Turn-Off from 1.5X Mode
(VIN = 3.5V; 20mA Load)
Time (200μs/div)
Diode Current vs. Temperature
(20mA/channel)
22.0
21.5
21.0
20.5 ID1
20.0 ID2
19.5
19.0
ID3
ID4
18.5
18.0
-40 -25 -10
5
20 35 50 65 80
Temperature (°C)
95
3155.2006.05.1.1
5
5 Page 
www.DataSheet4U.com
AAT3155
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
Ordering Information
Package
TSOPJW-12
Marking1
QOXYY
Part Number (Tape and Reel)2
AAT3155ITP-T1
All AnalogicTech products are offered in Pb-free packaging. The term “Pb-free” means
semiconductor products that are in compliance with current RoHS standards, including
the requirement that lead not exceed 0.1% by weight in homogeneous materials. For more
information, please visit our website at http://www.analogictech.com/pbfree.
Package Information
0.20
+
-
0.10
0.05
TSOPJW-12
0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC 0.50 BSC
3.00 ± 0.10
7° NOM
0.04 REF
All dimensions in millimeters.
0.055 ± 0.045
0.010
4° ± 4°
2.75 ± 0.25
0.45 ± 0.15
1. XYY = assembly and date code.
2. Sample stock is generally held on part numbers listed in BOLD.
© Advanced Analogic Technologies, Inc.
AnalogicTech cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in an AnalogicTech product. No circuit patent licenses, copyrights, mask work rights,
or other intellectual property rights are implied. AnalogicTech reserves the right to make changes to their products or specifications or to discontinue any product or service without notice.
Customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. All products are sold sub-
ject to the terms and conditions of sale supplied at the time of order acknowledgement, including those pertaining to warranty, patent infringement, and limitation of liability. AnalogicTech
warrants performance of its semiconductor products to the specifications applicable at the time of sale in accordance with AnalogicTech’s standard warranty. Testing and other quality con-
trol techniques are utilized to the extent AnalogicTech deems necessary to support this warranty. Specific testing of all parameters of each device is not necessarily performed.
AnalogicTech and the AnalogicTech logo are trademarks of Advanced Analogic Technologies Incorporated. All other brand and product names appearing in this document are regis-
tered trademarks or trademarks of their respective holders.
Advanced Analogic Technologies, Inc.
830 E. Arques Avenue, Sunnyvale, CA 94085
Phone (408) 737-4600
Fax (408) 737-4611
3155.2006.05.1.1
11
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet AAT3155.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| AAT3151 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |  Advanced Analogic Technologies |
| AAT3152 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications | Advanced Analogic Technologies |
| AAT3153 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications | Advanced Analogic Technologies |
| AAT3155 | High Efficiency 1X/1.5X/2X Charge Pump | AAT |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |