datasheetbank_Logo
数据手册搜索引擎和 Datasheet免费下载 PDF

AAT3153 查看數據表(PDF) - Analog Technology Inc

零件编号
产品描述 (功能)
比赛名单
AAT3153 Datasheet PDF : 10 Pages
1 2 3 4 5 6 7 8 9 10
AAT3153
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
General Description
The AAT3153 is a low noise, constant frequency
charge pump DC/DC converter that uses a tri-mode
load switch (1X), fractional (1.5X), and doubling (2X)
conversion to maximize efficiency for white LED
applications. The AAT3153 is capable of driving six-
channel LEDs from a 2.7V to 5.5V input. The current
sinks may be operated individually or in parallel for
driving higher-current LEDs. Low external parts
count (two 1µF flying capacitors and two small 1µF
capacitors at VIN and VOUT) makes this part ideally
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 eight settings (20mA
down to 50µA) including main and sub-display
group control. The AAT3153 consumes extremely
low current internally (40µA typical) at light load for
optimized efficiency.
Each output of the AAT3153 is equipped with built-
in protection for VOUT short circuit and auto-disable
for load short-circuit condition. Built-in soft-start cir-
cuitry prevents excessive inrush current during
start-up. A low current shutdown feature discon-
nects the load from VIN and reduces quiescent cur-
rent to less than 1µA.
The AAT3153 is available in a space-saving, thermal-
enhanced 16-pin 4x4mm QFN package.
Features
ChargePump
• VIN Range: 2.7V to 5.5V
• Fully Programmable Current with Single Wire
• Eight-Step Current: 20mA-50µA
• Individual Main-Sub Group Control
• Low IQ (40µA) at Light Load
• Tri-Mode 1X, 1.5X, and 2X Charge Pump for
Maximum Efficiency and VF Coverage
• Drives Up to Six Channels of LEDs
• No Inductors, Low Noise Operation
• 1MHz Constant Switching Frequency
• Small Application Circuit
• Built-In Thermal Protection
• Built-In Auto-Disable for Short-Circuit
• Automatic Soft-Start
• IQ <1µA in Shutdown
• Thermal-Enhanced 4x4mm16-Pin QFN
Package
Applications
• Color (RGB) Lighting
• Programmable Current Sinks
• White LED Backlighting
• White Photo-Flash for DSCs
Typical Application
2.7V to 5.5V
VIN
C1+
C1
1µF
CIN
C1-
1µF
C2+
AAT3153
C2
1µF
C2-
EN/SET
VOUT
EN/SET
D1
D2
D3
D4
D5
GND
D6
D1 D2 D3 D4 D5 D6
COUT
1µF
3153.2004.10.0.6
1

Share Link: 

datasheetbank.com [ Privacy Policy ] [ Request Datasheet ] [ Contact Us ]