DataSheetWiki


AAT3123A fiches techniques PDF

AAT - High Efficiency 1X/1.5X Fractional Charge Pump

Numéro de référence AAT3123A
Description High Efficiency 1X/1.5X Fractional Charge Pump
Fabricant AAT 
Logo AAT 





1 Page

No Preview Available !





AAT3123A fiche technique
AAT3123/23A/24
High Efficiency 1X/1.5X Fractional Charge
Pump for White LED Applications
General Description
Features
ChargePump
The AAT3123/23A/24 is a low noise, constant fre-
quency charge pump DC/DC converter that uses a
• VIN Range: 2.7V to 5.5V
• Dual Mode 1X and 1.5X Charge Pump for
dual mode load switch (1X) and fractional (1.5X)
Maximum Efficiency
conversion to maximize efficiency for white LED
applications. The device can be used to produce
• Drives Low-VF and High-VF Type LEDs
• Up to Six 20mA Outputs (AAT3124)
current levels up to 20mA to drive up to six LEDs
• Up to Four 20mA Outputs (AAT3123/23A)
from a 2.7V to 5.5V input. Outputs may be operat-
• 32-Position Logarithmic Scale with Digital
ed individually or paralleled for driving higher-cur-
Control
rent LEDs. A low external parts count (two 1µF fly-
• Simple Serial Control (S2Cwire) Interface
ing capacitors and two small 1µF capacitors at VIN
and OUT) make the AAT3123/23A/24 ideally suited
• Low Noise Constant Frequency Operation
• 1MHz Switching Frequency
for small battery-powered applications.
• Small Application Circuit
AnalogicTech’s Simple Serial Control™ (S2Cwire™)
interface is used to enable, disable, and set the
LED drive current with a 32-level logarithmic scale
LED brightness control. The AAT3123/23A/24 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
• Regulated Output Current
• Automatic Soft Start
• No Inductors
• IQ <1µA in Shutdown
• Temperature Range: -40°C to +85°C
• 12-Pin TSOPJW Package (AAT3123/23A)
• 16-Pin 4x4mm QFN Package (AAT3124)
inrush current during start-up. A high charge pump
switching frequency enables the use of very small
external capacitors. A low-current shutdown featurewww.DataSheet4U.com
disconnects the load from VIN and reduces quies-
Applications
cent current to less than 1µA. The device also inte-
grates a test current/auto-disable feature for each
• Color (RGB) Lighting
channel. The AAT3123/23A is available in a very
• Programmable Current Source
small, Pb-free 12-pin TSOPJW package. The six
• White LED Backlighting
output AAT3124 is available in a Pb-free 16-pin
• White Photo Flash for DSCs
4x4mm QFN package.
Typical Application
VBATTERY
VIN C1+
CIN COUT
1µF 1µF
EN/SET
VOUT
C1-
C2+
AAT3124
C2-
EN/SET
GND
D1
D2
D3
D4
D5
D6
C1
1µF
C2
1µF
D6 D5 D4 D3 D2 D1
3123.2005.12.1.4
1

PagesPages 18
Télécharger [ AAT3123A ]


Fiche technique recommandé

No Description détaillée Fabricant
AAT3123 High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ETC
ETC
AAT3123A High Efficiency 1X/1.5X Fractional Charge Pump AAT
AAT
AAT3123ITP-20-T1 High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications ETC
ETC

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche