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PDF SiP12401 Data sheet ( Hoja de datos )
| Número de pieza | SiP12401 | |
| Descripción | Boost Controller For Double AA Cell or Li-Ion Battery | |
| Fabricantes | Vishay Siliconix | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de SiP12401 (archivo pdf) en la parte inferior de esta página. Total 6 Páginas | ||
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SiP12401
New Product
Vishay Siliconix
www.DataSheet4U.com
Boost Controller For Double AA Cell or Li-Ion Battery
For White LED Application
FEATURES
D Voltage Mode Control with Internal Frequency
Compensation
D 1.8-V to 5.0-V Input Voltage Range
Product Is
Completely
Pb-free
D PWM Control with 600-kHz Fixed Switching Frequency
D Analog Control of LED Intensity
D Regulated Output Current
D Integrated UVLO and Soft-Start
D Logic Controlled Shutdown (t1 mA)
D High Efficiency: Typical 80%
D PowerPAKr MLP33-6 Package
APPLICATIONS
D White LED Backlighting
D LCD Bias Supplies
D Handheld Devices
D Digital Cameras
D Portable Applications
DESCRIPTION
SiP12401 is a boost controller IC for double cell NiMH or
Alkaline battery and Li Ion battery, which can drive white LEDs
connected in series to provide backlight in hand-held devices.
Series connection of the LEDs provides identical LED currents
resulting in uniform brightness and eliminating the need for
ballast resistors. For best efficiency performance, the
SiP12401 is designed to operate in PWM mode with 600-kHz
switching. The voltage-mode PWM design is internally
compensated, reducing the external parts count. It accepts
input voltages from 1.8 V to 5.0 V. The LED current can be
adjusted externally for its brightness control. SiP12401
features low shutdown current of under 1 mA.
SiP12401 is available in a lead (Pb)-free 6-pin, PowerPAK
MLP33 package and is specified to operate over the industrial
temperature range of –40 οC to 85 οC.
TYPICAL APPLICATION CIRCUIT
VIN
10 mF
XSHD
22 mH
2
VIN
1 XSHD
AGND 4
SiP12401
3
FB
EXT 6
PGND
5
MBR0520
4.7 mF
Si2302ADS
15 W
Document Number: 73193
S-50378—Rev. B, 28-Feb-05
www.vishay.com
1
1 page  
TYPICAL CHARACTERISTICS
New Product
SiP12401
Vishay Siliconix
www.DataSheet4U.com
Maixmum PWM Duty Cycle vs. Temperature
85
84
83
82
81
80
−50 −30 −10 10 30 50 70 90
Temperature (_C)
Feedback Voltage vs. Temperature
4
3
2
1
VIN = 5 V
0
−1 VIN = 2 V
−2
−3
−4
−50 −30 −10 10 30 50
Temperature (_C)
70
90
Supply Current vs. Temperature
220
215
210
205
200
195
190
185
180
−50 −30 −10 10 30 50
Temperature (_C)
70
90
Shutdown Threshold vs. Temperature
1.2
1.0 VIN = 5 V
0.8
VIN = 2 V
0.6
0.4
0.2
0.0
−50 −30 −10 10 30 50 70 90
Temperature (_C)
Document Number: 73193
S-50378—Rev. B, 28-Feb-05
www.vishay.com
5
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet SiP12401.PDF ] | |
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