Datasheet > LND3844B

LND3844B

更新时间： 2024-10-19 05:42:27

品牌	Logo	应用领域
LINEAR_DIMENSIONS		控制器
页数	文件大小	规格书
10页	159K
描述
Current Mode PWM Controller

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中文翻译

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数据手册

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LND3844B 数据手册

DATA SHEET

LND3842A/43A/44A/45A

LND3842B/43B/44B/45B

Current Mode PWM Controller

FEATURES

GENERAL DESCRIPTION

The LND3842B/43B/44B/45B and LND3842A

/43A/44A/45A are fixed frequency current mode

PWM controllers. They are specially designed for

OFF-line and DC to DC converter applications with

a minimal of external components. Internally

implemented circuits include a trimmed oscillator for

precise duty cycle control, a temperature

•

Low start-up and operating Current

High Current Totem Pole Output

Undervoltage Lockout with Hysterisis

Operating Frequency up to 500KHZ

compensated reference, high gain error amplifier,

current sensing comparator. Protection circuitry

includes undervoltage lockout and current limiting.

The LND3843B, A and LND3844B, A have UVLO

thresholds of 16V(on) and 10 V (off). The

corresponding thresholds for the LND3843B, A/

45B,A are 8.4 V (on) and 7.6(off). The LND3842B,

A and LND3843B, A can operate within 100% duty

cycle. The LND3844B, A and LND3845B, A can

operate within 50% duty cycle.

PIN CONFIGURATION

The LND384XB has Start-Up current of .45mA(typ).

The LND384XA has Start-Up current of .17mA(typ).

COMP

REF

OUT

GND

SENSE

/ C

• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •

12 3 4 5 6 7...10

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