FAN5333B屬于集成電路（IC）的LED驅(qū)動(dòng)器。由安森美半導(dǎo)體公司制造生產(chǎn)的FAN5333BLED 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?？蓪?duì)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。

描述 Description

The FAN5333A/FAN5333B is a general purpose LED driver that features fixed frequency mode operation and an integrated FET switch. The device’s high output power makes it suitable to drive flash LEDs in serial connections. This device is designed to operate at high switching frequencies in order to minimize switching noise measured at the battery terminal of hand-held communications equipment. Quiescent current in both normal and shutdown mode is designed to be minimal in order to extend battery life. Normal or shutdown mode can be selected by a logic level shutdown circuitry.

特性 Features

■ 1.5MHz Switching Frequency

■ Low Noise

■ Adjustable Output Voltage

■ Up to 1.5A Peak Switch Current

■ 1.5W Output Power Capability

■ Low Shutdown Current: <1μA

■ Cycle-by-Cycle Current Limit

■ Low Feedback Voltage

■ Over-Voltage Protection

■ Fixed-Frequency PWM Operation

■ Internal Compensation

■ FAN5333A has 110mV Feedback Voltage

■ FAN5333B has 315mV Feedback Voltage

■ Thermal Shutdown

■ 5-Lead SOT23 Package

Applications

■ Cell Phones

■ PDAs

■ Handheld Equipment

■ Display Bias

■ LED Bias

■ Flash LED