Datasheet > EC4304BNB2R

EC4304BNB2R

更新时间： 2024-01-21 00:19:15

品牌	Logo	应用领域
飞虹 - E-CMOS		/
页数	文件大小	规格书
11页	212K
描述
PWM Control 1.2A Step-Down Converter

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数据手册

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EC4304BNB2R 数据手册

PWM Control 1.2A Step-Down Converter EC4304B

FEATURES

GENERAL DESCRIPTION

• Wide Input Voltage Range: 7V to 36V

• LED Output Current Up to 1.2A

• Soft-start

• Single pin on/off and brightness control using

DC voltage or PWM

The EC4304B is a continuous mode inductive

step-down converter, designed for driving

single or multiple series connected LEDs

efficiently from a voltage source higher than

the LED voltage. The device operates from an

input supply between 7V and 36V and

provides an externally adjustable output

current of up to 1.2A. Depending upon supply

voltage and external components, this can

provide up to 42 watts of output power. The

EC4304B includes the output switch and a high-

side output current sensing circuit, which uses

an external resistor to set the nominal average

output current. Output current can be adjusted

above, or below the set value, by applying an

external control signal to the 'ADJ' pin. The ADJ

pin will accept either a DC voltage or a PWM

waveform. Depending upon the control

• High efficiency (up to 97%)

• Up to 1MHz switching frequency

• Typical 5% output current accuracy

• SOT-23, SOT-89 Lead-free Package .

Applications

• LED/Display Back Light Driver

• Lightings

• Portable Communication Devices

• Handheld Electronics

frequency, this will provide either

continuous or a gated output current. The

PWM filter components are contained within

the chip. The EC4304B is available in SOT-23,

SOT-89 Lead-free package.

PART NUMBER EXAMPLES

PART NO.

EC4304BNB2R

EC4304BNB6R

PACKAGE

SOT-23-5

SOT-89-5

PIN ARRANGEMENT(Top view)

EC4304BNB2R

SOT-23-5

EC4304BNB6R

SOT-89-5

E-CMOS Corp. (www.ecmos.com.tw)

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2011/10/06

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