SIP12401屬于集成電路（IC）的LED驅(qū)動器。由威世科技半導(dǎo)體制造生產(chǎn)的SIP12401LED 驅(qū)動器器件屬于 LED 驅(qū)動器電源管理集成電路 (PMIC) 系列，可通過標(biāo)稱固定電壓的電源為負(fù)載（通常為發(fā)光二極管）提供電流，并且電流可控。它與用于電壓調(diào)節(jié)的類似產(chǎn)品的主要區(qū)別在于，這類器件提供較低的反饋電壓（以提高系統(tǒng)能效），而且通?？蓪ζ骷ぷ鼽c進(jìn)行外部控制，可在照明應(yīng)用中用于實現(xiàn)調(diào)光功能。

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.

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