Datasheet > ASM8P1843

ASM8P1843

更新时间： 2024-11-23 22:50:15

品牌	Logo	应用领域
ALSC		控制器
页数	文件大小	规格书
11页	1577K
描述
Voltage Mode PWM Controller with EMI Reduction

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中文翻译

获取价格

数据手册

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ASM8P1843 数据手册

ASM8P18S42 / ASM8P18S42ER

ASM8P1843 / ASM8P18S43ER

ASM8P18S44ER / ASM8P18S45ER

June 2005

rev 0.6

Voltage Mode PWM Controller with EMI Reduction

General Description

Features

ASM8P18xx is a high performance, adjustable frequency,

PWM controller with an integrated spread spectrum

modulator for EMI reduction. It contains all the functions

ꢀ 30V maximum operating voltage with CMOS

technology

ꢀ Adjustable PWM frequencies (40 KHz to 400 KHz)

ꢀ Maximum Output drive current of 1A.

ꢀ Wide duty cycle range (0% minimum to 95%

maximum)

a standard PWM controller along with a user

configurable spread spectrum modulation with adjustable

spread. ASM8P18xx allows significant system cost

savings by reducing the number of PCB layers and

shielding that are traditionally required to pass EMI

regulation.

ꢀ Spread spectrum modulation with adjustable spread.

ꢀ Under voltage lockout with hysteresis.

ꢀ Low startup current: 275µA maximum

ꢀ Pin compatible with industry standard 3842 PWM

controller.

ASM8P18xx is the industry’s first general purpose EMI

reduction IC, specifically designed for use in SMPS

systems. ASM8P18xx is compatible to any other 3842

PWM controllers.

ꢀ Temperature range –40°C to +85°C.

ꢀ Thermal shutdown, overload and undercurrent

protection.

ꢀ Frequency skip mode.

ASM8P18xx is capable of driving 1A maximum current

output and it covers a wide supply voltage range from 7V

DC to 30V DC. The PWM frequency is selectable from 40

KHz to 400 KHz.

ꢀ Available in 8-pin plastic MicroSO, P-DIP and SOIC

packages.

Applications

ꢀ Off-line converter

ꢀ DC-DC converter

ASM8P18xx provides under voltage lockout, thermal

shutdown, overload, and undercurrent protection. It is

available in 8-pin MicroSO, P-DIP and SOIC package.

ꢀ Monitor power supply

ꢀ Computer/DVD/STB power supply

ꢀ Wireless base station power supply

ꢀ Telecom power supply

Typical Operating Circuit

V_DD

V_IN

V_DD

FSEL

GND

C_T

ASM8P18xx

V_REF

OUT

I_SNS

COMP

R_D

R₃

R₁

R₂

C_C

R_C

R_S

From SMPS Output

Alliance Semiconductor

2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 •

Notice: The information in this document is subject to change without notice.

12 3 4 5 6 7...11

中文翻译

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与ASM8P1843相关器件

型号	品牌	获取价格	描述	数据表
ASM8P1843F-08-MX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P1843F-08-MX	PULSECORE	获取价格	Switching Controller, Voltage-mode, 1A, 400kHz Switching Freq-Max, CMOS, PDSO8, ROHS COMPL
ASM8P1843F-08-PX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P1843F-08-SX	PULSECORE	获取价格	Switching Controller, Voltage-mode, 1A, 400kHz Switching Freq-Max, CMOS, PDSO8, 0.150 INCH
ASM8P1843F-08-SX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P18S42	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P18S42ER	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P18S42ERF-08-MX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P18S42ERF-08-PX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction
ASM8P18S42ERF-08-SX	ALSC	获取价格	Voltage Mode PWM Controller with EMI Reduction

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