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PDF A8168 Data sheet ( Hoja de datos )
| Número de pieza | A8168 | |
| Descripción | SERIES WHITE LED BACKLIGHT DRIVER / 1MHz PWM STEP-UP DC-DC CONVERTER | |
| Fabricantes | AiT Semiconductor | |
| Logotipo |  |
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AiT Semiconductor Inc.
www.ait-ic.com
A8168
SERIES WHITE LED BACKLIGHT DRIVER
1MHz PWM STEP-UP DC-DC CONVERTER
DESCRIPTION
FEATURES
The A8168 Series is a fixed frequency, constant
current step-up DC/DC converter idea for driving
LEDs used in backlighting application on cellular
phones, PDAs and digital cameras etc. Output
voltage of up to 17.5V can be derived, and from a
3.2V input four white LED’s can be driven in series
or alternatively, using a 2.5V input, a network of two
parallel legs with three in each may be driven.
Luminance of the LED’s is controlled by changing
the duty cycle of a PWM signal applied to the CE
pin.
Oscillation frequency : 1.0 MHZ
Output voltage range ; up to 17.5V externally
set-up reference voltage 0.2V
On resistance : 2.0Ω
Efficiency : 88%(When driving 3 white LEDs in
series Vin=3.6V ILED=20mA)
Control : PWM control
Stand-by Current : ISTB=1.0μA(MAX)
Load capacitor : 0.22μF, ceramic
Lx Limit Current : 300mA
Available in SOT-26 package
In addition, an internal MOSFET with an RDS(ON) of
2Ω is used. Allow profile and small board area
solution can be achieved using a chip coil and an
ultra small ceramic output capacitor (CL) of 0.22uF.
The A8168 is available in SOT-26 Package.
APPLICATIONS
For White LED Drivers
Mobil phones, PHS
PDAs
Digital still cameras
ORDERING INFORMATION
TYPICAL APPLICATION
Package Type
Part Number
SOT-26
A8168E6R-XXX
E6
A8168e6vr-xxx
Note
XXX: FeedBack Voltage
020~149=0.2V~1.49V
0.20~0.49V:Low
1.20 ~ 1.49V:High
R: Tape & Reel
V: Green Package
AiT provides all Pb free products
Suffix “ V “ means Green Package
REV1.0
- NOV 2008 RELEASED -
-1-
1 page  
AiT Semiconductor Inc.
www.ait-ic.com
TEST SCHEMATICS
Schematics #1
A8168
SERIES WHITE LED BACKLIGHT DRIVER
1MHz PWM STEP-UP DC-DC CONVERTER
Schematics #2
Schematics #3
Schematics #4
REV1.0
- NOV 2008 RELEASED -
-5-
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet A8168.PDF ] | |
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