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參數(shù)資料
| 型號： | AAT3132ITP-1-T1 |
| 廠商： | Advanced Analogic Technologies, Inc. |
| 英文描述： | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
| 中文描述： | 高效率1.5倍分數(shù)電荷泵白光LED應(yīng)用 |
| 文件頁數(shù)： | 13/14頁 |
| 文件大小： | 231K |
| 代理商： | AAT3132ITP-1-T1 |
However, if the diodes are dramatically different in
type comprising a mix of high-V
F
type and low-V
F
type LEDs, the AAT3132/32A has the capability to
optimally drive up to four LEDs of one type and up
to two LEDs of another type simultaneously. This
feature can be useful for driving different color
LEDs, driving both display backlight and photo-
flash LEDs, or for driving main and sub-LCD dis-
play LED backlights from a single charge pump IC.
For example, when driving independent RGB
LEDs, the green and blue LEDs typically require a
high V
F
to operate (e.g., 3.7V), while the red LED
needs a low forward voltage (e.g., 2V). By con-
necting the green and blue diodes to outputs D1 to
D3 and the red diodes to D4, good control and uni-
formity in brightness is maintained despite the 2V
difference in the diode forward voltages.
Similarly, if a 4V photo-flash LED array is connect-
ed to outputs D1 through D3 (with the outputs short-
ed together) and two 3.3V sub-LCD display back-
light LEDs are connected to output D4, then the
AAT3132/32A can optimally drive each set of LEDs
at the programmed current level (see Figure 2).
AAT3132/32A
High Efficiency 1.5X Fractional Charge
Pump for White LED Applications
3132.2005.12.1.4
13
Figure 2: AAT3132/32A Driving Two Groups of Paralleled White LEDs
(e.g., main and sub-LCD backlights).
C
IN
1
μ
F
V
BATTERY
C
OUT
1
μ
F
EN/SET
C1
1
μ
F
C2
1
μ
F
D2
D3
D4
D5
VIN
VOUT
C1+
C1-
C2+
C2-
D1
D2
D3
D4
EN/SET
GND
AAT3132
AAT3132A
D1
D6
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| AAT3132ITP-T1 | High Efficiency 1.5X Fractional Charge Pump for White LED Applications |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AAT3132ITP-T1 | 制造商:Skyworks Solutions Inc 功能描述:LED Lighting Drivers High Efficiency 1.5x Fractional Chrg Pump |
| AAT3134 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3134ISN-T1 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:High Efficiency 1X/1.5X Fractional Charge Pump for White LED Applications |
| AAT3140 | 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 |
| AAT3140_07 | 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 |
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