描述 Description

The MP1528 is a step up converter designed for driving up to nine (9) series White LEDs (LED) from a single cell Lithium-Ion battery. It regulates the LED current and includes an analog input for varying the LED brightness. The MP1528 uses current limited, variable frequency architecture to regulate the LED current while maintaining high efficiency. The BIAS pin measures the output voltage and turns off the converter if an over voltage condition is present to prevent damage due to an open circuit condition. The LED current is measured with an external current sense resistor. The low 0.4V full-scale regulation threshold and 0.63O power switch minimize power loss. The MP1528 is available in an 8 pin MSOP and a tiny 6 pin 3mm x 3mm QFN packages.

特性 Features

●Drives up to 9 Series White LEDs
●Integrated 0.63? Power MOSFET
●Low 0.4V Full-Scale Current Sense Threshold
●Over 20mA Output Current Capacity
●Analog and Digital PWM Brightness Control
●Open Load Shutdown
●Soft Start
●Internal Current Limit
●Under Voltage Lockout
●Thermal Shutdown
●Available in 8 Pin MSOP and Tiny 3mm x 3mm 6 Pin QFN Packages

簡介

MP1528屬于集成電路（IC）的LED驅(qū)動(dòng)器。由制造生產(chǎn)的MP1528LED 驅(qū)動(dòng)器器件屬于 LED 驅(qū)動(dòng)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），而且通常可對器件工作點(diǎn)進(jìn)行外部控制，可在照明應(yīng)用中用于實(shí)現(xiàn)調(diào)光功能。