Datasheet > L5030_15

L5030_15

更新时间： 2022-10-12 16:46:32

品牌	Logo	应用领域
友顺 - UTC		驱动
页数	文件大小	规格书
6页	198K
描述
BOOST-UP VOLTAGE CONVERTER FOR LED DRIVER

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L5030_15 数据手册

L5030

LINEAR INTEGRATED CIRCUIT

DEVICE DESCRIPTION

The UTC L5030 is designed to supply a constant current to the external load, the circuit be powered a battery

supply. An external transistor is required for LED application. The UTC L5030 guarantees the start up voltage as low

as 0.92V and remains operation down to 0.8V.

The basic structure of UTC L5030 is a step-up DC/DC converter. It offers a Pulse Frequency Modulation (PFM)

operation, which controls the constant OFF time (1.7μs typically) for external transistor at the 200KHz maximum

frequency.

The external switching transistor is ON and kept on until the voltage across the current-sense resistor which is

connected in series with the emitter of the switching transistor exceeds the I_SENSEinput threshold (19mV). The

transistor is shut OFF and the energy stored in inductor is discharged when I_SENSEinput threshold exceeds 19mV.

Once the discharge cycle is completed, the external transistor is ON again. This charging and discharging sequence

will repeat and trigger the external transistor regardless the inductor current value.

UNISONIC TECHNOLOGIES CO., LTD

3 of 6

QW-R125-001.D

www.unisonic.com.tw

1 234 5 6

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