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參數(shù)資料
| 型號(hào)： | ASM8I18S42ERG-08-SX |
| 廠商： | ALLIANCE SEMICONDUCTOR CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 1 A SWITCHING CONTROLLER, 400 kHz SWITCHING FREQ-MAX, PDSO8 |
| 封裝： | 0.150 INCH, GREEN, SOIC-8 |
| 文件頁(yè)數(shù)： | 1/11頁(yè) |
| 文件大小： | 689K |
| 代理商： | ASM8I18S42ERG-08-SX |
ASM8P18S42ER
ASM8P18S43ER
December 2005
ASM8P18S45ER
rev 1.2
Notice: The information in this document is subject to change without notice.
Alliance Semiconductor
2575 Augustine Drive
Santa Clara, CA Tel: 408.855.4900 Fax: 408.855.4999 www.alsc.com
Voltage Mode PWM Controller with EMI Reduction
General Description
ASM8P18xx is a high performance, adjustable frequency,
PWM controller with an integrated spread spectrum
modulator for EMI reduction. It contains all the functions
of 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.
ASM8P18xx is the industry’s first general purpose EMI
reduction IC, specifically designed for use in SMPS
systems. ASM8P18xx is pin compatible to 384x family of
PWM controllers.
ASM8P18xx is capable of driving 1A maximum current
output and it covers a wide supply voltage range from
7V DC to 30V DC (25VMAX for Micro SO). The PWM
frequency is selectable from 40 KHz to 400 KHz.
ASM8P18xx provides under voltage lockout, thermal
shutdown, and overload and cycle-by-cycle current limit.
AS8P18S4xx provides cycle slip feature which reduces
no load power consumption of converters. It is available
in 8-pin MicroSO, P-DIP and SOIC Package.
Typical Operating Circuit
Features
30V maximum operating voltage with BiCMOS
technology (25VMAX for Micro SO)
Adjustable PWM frequencies
40KHz to 400KHz Operation
Maximum Output drive current of 1A
Wide duty cycle range
(0% minimum to 99% maximum)
Spread Spectrum Modulation with adjustable spread
for EMI Reduction
Under voltage lockout with hysteresis
Low startup current: 700A maximum
Pin compatible with industry standard 3842 PWM
controller
Temperature range –40
°C to +85°C
Thermal shutdown and overload protection
Frequency skip mode at Light load condition
Available in 8-pin plastic MicroSO, P-DIP and SOIC
Packages
Applications
Off-line converter
DC-DC converter
Monitor power supply
Computer/DVD/STB power supply
Wireless base station power supply
Telecom power supply
From SMPS Output
VDD
VIN
FSEL
GND
CT
VREF
OUT
COMP
RC
CC
R1
R2
RS
ISNS
FB
RD
R3
ASM8P18xx
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ASM8I18S42F-08-MX | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Voltage Mode PWM Controller with EMI Reduction |
| ASM8I18S42F-08-PX | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Voltage Mode PWM Controller with EMI Reduction |
| ASM8I18S42F-08-SX | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Voltage Mode PWM Controller with EMI Reduction |
| ASM8I18S43ERF-08-MX | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Voltage Mode PWM Controller with EMI Reduction |
| ASM8I18S43ERF-08-PX | 制造商:ALSC 制造商全稱:Alliance Semiconductor Corporation 功能描述:Voltage Mode PWM Controller with EMI Reduction |
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