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PDF A8230A Data sheet ( Hoja de datos )
| Número de pieza | A8230A | |
| Descripción | ULTRA LOW-DROPOUT CONSTANT-CURRENT WITHOUT WHITE LED BIAS | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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AiT Semiconductor Inc.
www.ait-ic.com
A8230A
ULTRA LOW-DROPOUT CONSTANT-CURRENT WITHOUT
WHITE LED BIAS
DESCRIPTION
The A8230A is a high performance ultra low-
dropout constant current bias supply for white
LEDs. It can be used as an alternative to the
simple ballast resistors in conventional parallel
white LEDs applications. For dimming control,
an enable input pin is controlled by processor
GPIO output pulses for 32 level linear current.
Using a low frequency PWM waveform to this
enable input pin also controls the average LED
current which is proportional to the PWM duty.
The A8230A is suitable for single cell Li-ion
bat-tery power device that using low forward
voltage white LEDs. The white LEDs can be
powered directly from battery without extra
external components. This takes an advantage
of highest efficiency and creates no EMI
problem.
The A8230A is available in SOT-26 package.
FEATURES
Ultra Low 200mV Dropout at 20mA
0.6% High Accuracy Current Matching
20mA Full Scale Current
32 Level Linear Current Brightness Control
PWM Brightness Control
2.5V to 6V Supply Voltage Range
Thermal shutdown function
Under-voltage protection function
Available in SOT-26 Package
APPLICATION
Mobile Phones
White LED backlighting
Camera Flash LED Lighting
TYPICAL APPLICATION
ORDERING INFORMATION
Package Type
Part Number
SOT-26
A8230AE6R
E6
A8230AE6VR
Note
R: Tape & Reel
V: Green Package
AiT provides all Pb free products
Suffix “ v “ means Green Package
Figure 1
REV1.0
- JUN 2011 RELEASED -
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
A8230A
ULTRA LOW-DROPOUT CONSTANT-CURRENT WITHOUT
WHITE LED BIAS
TYPICAL CHARACTERISTICS
VCC = VEN = 3.6V, VLED = 0.5V, T = 25°C, unless otherwise noted.
1. PWM Diming Waveform
2. Linear Diming Waveform
3. Linear Diming Waveform
4. Input Voltage UVLO
5. Quiescent Current vs Temperature
6. Quiescent Current vs VCC
REV1.0
- JUN 2011 RELEASED -
-5-
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet A8230A.PDF ] | |
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