參數(shù)資料
型號(hào)： AAT3129
廠商： Advanced Analog Technology,lnc.
英文描述： High Efficiency 1X/1.5X/2X Charge Pump for RGB Color LED Applications
中文描述： 高效率1x/1.5x/2x充電泵為RGB顏色LED應(yīng)用
文件頁(yè)數(shù)： 9/15頁(yè)
文件大?。?/td> 433K
代理商： AAT3129
AAT3129
High Efficiency 1X/1.5X/2X Charge Pump
for RGB Color LED Applications
3129.2007.01.1.4
9
Functional Block Diagram
Voltage
Reference
Soft Start
1MHz
Oscillator
1X
1.5X
2X
Charge
Pump
AS
2
Cwire
Interface
Control
C1-
C2+
C2-
CP
ISRC
DR
DG
DB
GND
EN/SET
VIN
C1+
Functional Description
The AAT3129 is a tri-mode load switch (1X) and
high efficiency (1.5X or 2X) charge pump device
intended for fashion color LED lighting applications.
To maximize power conversion efficiency, an inter-
nal sensing circuit monitors the voltage required on
the constant current source output and sets the
load switch and charge pump modes based on the
input battery voltage and the current source output
voltage. As the battery discharges over time, the
AAT3129 charge pump is enabled when the current
source output nears dropout. The charge pump ini-
tially starts in 1.5X mode. If the charge pump out-
put drops enough for the current source output to
become close to dropout, the charge pump will
automatically transition to 2X mode.
The AAT3129 requires only four external compo-
nents: two 1
μ
F ceramic capacitors for the charge
pump flying capacitors (C1 and C2), one 1
μ
F
ceramic input capacitor (C
IN
), and one 0.33
μ
F to
1
μ
F ceramic output capacitor (C
P
).
The color and brightness of an RGB color LED is
maintained by PWM signals, which are pro-
grammed via the AS
2
Cwire interface. The control
block generates three gate drive PWM signals for
the N-channel MOSFET switches. Please refer to
the interface description and timing in the following
section for details.
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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AAT3131 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications
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