L4990A中文資料意法半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書
| 廠商型號(hào) |
L4990A |
| 功能描述 | PRIMARY CONTROLLER |
| 文件大小 |
322.27 Kbytes |
| 頁(yè)面數(shù)量 |
24 頁(yè) |
| 生產(chǎn)廠商 | STMicroelectronics |
| 企業(yè)簡(jiǎn)稱 |
STMICROELECTRONICS【意法半導(dǎo)體】 |
| 中文名稱 | 意法半導(dǎo)體集團(tuán)官網(wǎng) |
| 原廠標(biāo)識(shí) |  |
| 數(shù)據(jù)手冊(cè) | |
| 更新時(shí)間 | 2025-5-18 23:00:00 |
| 人工找貨 | L4990A價(jià)格和庫(kù)存，歡迎聯(lián)系客服免費(fèi)人工找貨 |
L4990A規(guī)格書詳情
DESCRIPTION
This primary controller I.C., developed in BCD60II technology, has been designed to implement off line or DC-DC power supply applications using a fixed frequency current mode control. Based on a standard current mode PWM control ler this device includes some features as programmable soft start, IN/OUT synchronization, disable (to be used for over voltage protection and for power management), precise maximum Duty Cycle Control, 100ns (typ) leading edge blanking on current sense, pulse by pulse current limit and overcurrent protection with soft start in tervention.
■ CURRENT-MODE CONTROL PWM
■ SWITCHING FREQUENCY UP TO 1MHz
■ LOW START-UP CURRENT < 0.45mA
■ HIGH-CURRENT OUTPUT DRIVE SUITABLE FOR POWER MOSFET (1A)
■ FULLY LATCHED PWM LOGIC WITH DOUBLE PULSE SUPPRESSION
■ PROGRAMMABLE DUTY CYCLE
■ 100 AND 50 MAXIMUM DUTY CYCLE LIMIT
■ PROGRAMMABLE SOFT START
■ PRIMARY OVERCURRENT FAULT DETECTION WITH RE-START DELAY
■ PWM UVLO WITH HYSTERESIS
■ IN/OUT SYNCHRONIZATION
■ DISABLE LATCHED
■ INTERNAL 100ns LEADING EDGE BLANKING OF CURRENT SENSE
■ PACKAGE: DIP16 AND SO16W
產(chǎn)品屬性
- 型號(hào)：
L4990A
- 制造商：
STMICROELECTRONICS
- 制造商全稱：
STMicroelectronics
- 功能描述：
PRIMARY CONTROLLER
| 供應(yīng)商 | 型號(hào) | 品牌 | 批號(hào) | 封裝 | 庫(kù)存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
ST/意法 |
24+ |
NA/ |
11950 |
優(yōu)勢(shì)代理渠道,原裝正品,可全系列訂貨開增值稅票 |
詢價(jià) | ||
ST |
2016+ |
DIP16 |
8567 |
只做原裝,假一罰十,公司可開17%增值稅發(fā)票! |
詢價(jià) | ||
ST |
25+23+ |
DIP16 |
54700 |
絕對(duì)原裝正品現(xiàn)貨,全新深圳原裝進(jìn)口現(xiàn)貨 |
詢價(jià) | ||
ST/意法 |
25+ |
DIP16 |
58788 |
百分百原裝現(xiàn)貨 實(shí)單必成 歡迎詢價(jià) |
詢價(jià) | ||
ST |
24+ |
DIP16 |
20000 |
全新原廠原裝，進(jìn)口正品現(xiàn)貨，正規(guī)渠道可含稅??！ |
詢價(jià) | ||
ST |
23+ |
QFP |
3200 |
全新原裝、誠(chéng)信經(jīng)營(yíng)、公司現(xiàn)貨銷售! |
詢價(jià) | ||
ST |
22+ |
DIP-16 |
5000 |
原裝現(xiàn)貨庫(kù)存.價(jià)格優(yōu)勢(shì)!! |
詢價(jià) | ||
ST |
23+ |
DIP16 |
32732 |
原裝正品代理渠道價(jià)格優(yōu)勢(shì) |
詢價(jià) | ||
ST |
23+ |
SOP-16 |
5000 |
原裝正品,假一罰十 |
詢價(jià) | ||
24+ |
DIP |
75 |
詢價(jià) |
