Datasheet > VP3278

VP3278

更新时间： 2024-01-20 17:22:31

品牌	Logo	应用领域
其他 - ETC		/
页数	文件大小	规格书
6页	237K
描述
40V升壓IC，兼容LM3478

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VP3278 数据手册

Brief Pages

VP3278

High-Efficiency Boost/SEPIC/Flyback DC/DC Controller

General Description

Features

The VP3278 is a versatile controller designed for

use in Boost, SEPIC and Flyback power converter

and topologies that needs an external low-side N-

MOSFET acting as primary switch. Besides cycle-

by-cycle current limiting, current mode control

scheme also makes it wide bandwidth and good

transient response. The current limit can be pro-

grammed simply with an external resistor.

Wide Input Voltage from 2.97V to 40V

Reference Voltage with ±1.5% Accuracy

Adjustable 100kHz~1MHz Clock Frequency

10µA Shutdown Current

1A Peak Current Limit Using Internal Driver

Current Mode Operation

Internal 4/2Ω MOSFET Switch

External RC Compensation

Under-voltage Lockout with Hystersis

Internal Soft-Start

High Efficiency at Light Loads

Current Limit and Over Temperature Protec-

tionMSOP-10 Green Package with RoHS Com-

pliant

The switching frequency can be set in any value

between 100kHz and 1MHz with a resistor or any

external clock source. The VP3278 can be oper-

ated at high switching frequency to save the solu-

tion board size. While entering shutdown mode,

the VP3278 only sinks 5µA and it allows power

supply sequencing. It has built-in protection cir-

cuits such as thermal shutdown, under-voltage

lockout, short circuit protection, and overvoltage

protection. Internal soft-start circuitry reduces the Applications

inrush current at start-up.

Portable Speakers

Offline Power Supply

VP3278 is available in small MSOP-8 and SO-8

Battery Powered Device

green package.

Set-Top Box

Photovoltaic Inverters

Typical Application

VP3278 Rev P.00Brief

http://www.viva-elec.com.tw

12 3 4 5 6

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