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PDF AP3127B Data sheet ( Hoja de datos )
| Número de pieza | AP3127B | |
| Descripción | Step-Up DC/DC Converter | |
| Fabricantes | Chipown | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de AP3127B (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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AP3127B
Chipown
Step-Up DC/DC Converter
Series White LED Backlight Driver
General Description
The AP3127B Series is a fixed frequency, constant
current step-up DC/DC converter ideal for driving LEDs
used in backlighting applications on cellular phones,
PDAs and digital cameras etc. Output voltage of up to
23V can be derived, and from a 3.2V input six 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.
In addition, an internal MOSFET with an Rds(on) of
0.8Ω 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.
Applications
z For White LED Drivers
z Mobil phones, PHS
z PDAs，GPSs
z Digital still cameras
Features
z Input voltage range : 2.5V-6V
z Output voltage range : up to 23V externally set-up
reference voltage 0.25V
z Oscillation frequency : 1.0MHz
z On resistance : 0.8Ω
z Efficiency : 88%(When driving 3 white LEDs in
series Vin=3.6V ILED=20mA)
z Control : PWM control
z Stand-by Current : ISTB=1.0uA
z Load capacitor : 0.22uF,ceramic
z Lx limit Current :1.0A
Package
S0T-23-6L
Typical Application Circuit
Figure 1. Basic Application Circuit with AP3127B
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1 page  
AP3127B
Chipown
Typical Performance Characteristics
CH1=CE, CH2=FB
100Hz, 4 series LED, ILED=20mA
Figure 6
100Hz, 6 series LED, ILED=20mA
10KHz, 4 series LED, ILED=20mA
10KHz, 6 series LED, ILED=20mA
Ordering Information
Part Number
AP3127B025MR
1.XY=date code
P=Package factory
Mark
OBXYP1
P
Package
SOT-23-6L
8/F, ChuangYuan Building No.21-1 Changjiang Road, Wuxi New District Tel: +86(510)8521-7718 http://www.chipown.com.cn
V2.0
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5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet AP3127B.PDF ] | |
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