SIP12401 Datasheet, PDF (1/7 Pages) Vishay Siliconix – Boost Controller For Double AA Cell or Li-Ion Battery For White LED Application

SiP12401
Vishay Siliconix
Boost Controller For Double AA Cell or Li-Ion Battery
For White LED Application
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 µA.
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 °C to 85 °C.
FEATURES
• Voltage Mode Control with Internal
Frequency Compensation
• 1.8 V to 5.0 V Input Voltage Range
• PWM Control with 600 kHz Fixed
Switching Frequency
• Analog Control of LED Intensity
• Regulated Output Current
• Integrated UVLO and Soft-Start
• Logic Controlled Shutdown (< 1 µA)
• High Efficiency: Typical 80 %
• PowerPAK^® MLP33-6 Package
APPLICATIONS
• White LED Backlighting
• LCD Bias Supplies
• Handheld Devices
• Digital Cameras
• Portable Applications
RoHS
COMPLIANT
TYPICAL APPLICATION CIRCUIT
V_IN
10 µF
XSHD
22 µH
2
V_IN
1
XSHD
4
AGND
SiP12401
3
FB
6
EXT
PGND
5
MBR0520
4.7 µF
Si2302ADS
15 Ω
Document Number: 73193
S-71822-Rev. C, 03-Sep-07
www.vishay.com
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