- 您現在的位置：買賣IC網 > PDF目錄381233 > AAT3152 (Advanced Analog Technology,lnc.) High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications PDF資料下載
參數資料
| 型號： | AAT3152 |
| 廠商： | Advanced Analog Technology,lnc. |
| 英文描述： | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| 中文描述： | 高效率1x/1.5x/2x電荷泵白光LED應用 |
| 文件頁數： | 11/12頁 |
| 文件大?。?/td> | 325K |
| 代理商： | AAT3152 |
AAT3152
High Efficiency 1X/1.5X/2X Charge Pump
For White LED Applications
3152.2005.08.1.2
11
formance. Optimum performance will be obtained
when low Equivalent Series Resistance (ESR)
ceramic capacitors are used. In general, low ESR
may be defined as less than 100m
. A value of
1μF for all four capacitors is a good starting point
when choosing capacitors. If the LED current
sources are only programmed for light current lev-
els, then the capacitor size may be decreased.
Capacitor Characteristics
Ceramic composition capacitors are highly recom-
mended over all other types of capacitors for use
with the AAT3152. Ceramic capacitors offer many
advantages over their tantalum and aluminum elec-
trolytic counterparts. A ceramic capacitor typically
has very low ESR, is lowest cost, has a smaller
PCB footprint, and is non-polarized. Low ESR
ceramic capacitors help to maximize charge pump
transient response. Since ceramic capacitors are
non-polarized, they are not prone to incorrect con-
nection damage.
Equivalent Series Resistance
ESR is an important characteristic to consider when
selecting a capacitor. ESR is a resistance internal to
a capacitor that is caused by the leads, internal
connections, size or area, material composition,
and ambient temperature. Capacitor ESR is typical-
ly measured in milliohms for ceramic capacitors and
can range to more than several ohms for tantalum
or aluminum electrolytic capacitors.
Ceramic Capacitor Materials
Ceramic capacitors less than 0.1μF are typically
made from NPO or C0G materials. NPO and C0G
materials typically have tight tolerance and are sta-
ble over temperature. Larger capacitor values are
typically composed of X7R, X5R, Z5U, or Y5V
dielectric materials. Large ceramic capacitors, typ-
ically greater than 2.2μF, are often available in low-
cost Y5V and Z5U dielectrics, but capacitors
greater than 1μF are typically not required for
AAT3152 applications. Capacitor area is another
contributor to ESR. Capacitors that are physically
large will have a lower ESR when compared to an
equivalent material, smaller capacitor. These larger
devices can improve circuit transient response
when compared to an equal value capacitor in a
smaller package size.
Thermal Protection
The AAT3152 has a built-in thermal protection cir-
cuit that will shut down the charge pump if the die
temperature rises above the thermal limit, as is the
case during a short circuit of the V
OUT
pin.
相關PDF資料 |
PDF描述 |
|---|---|
| AAT3152IWP-T1 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3153ISN-T1 | High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3158 | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
| AAT3158ITP-T1 | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
| AAT3167 | High Efficiency 1X/1.5X/2X Charge Pump for White LED Applications |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AAT3152_05 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3152IWP-T1 | 制造商:SKYWORKS SOLUTIONS INC 功能描述:1X,1.5X,2X WLED CHPMP 12TDFN TR 制造商:Skyworks Solutions Inc 功能描述:LED DRIVER IC |
| AAT3153 | 制造商:AAT 制造商全稱:AAT 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3153ISN-T1 | 制造商:AAT 制造商全稱:AAT 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
| AAT3155 | 制造商:ANALOGICTECH 制造商全稱:Advanced Analogic Technologies 功能描述:High Efficiency 1X/1.5X/2X Charge Pump For White LED Applications |
發(fā)布緊急采購，3分鐘左右您將得到回復。