L4990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) |
L4990 |
| 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 | 2025-8-1 19:18:00 |
| 人工找貨 | L4990價(jià)格和庫(kù)存，歡迎聯(lián)系客服免費(fèi)人工找貨 |
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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)：
L4990
- 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 |
98+ |
DIP16 |
3560 |
全新原裝進(jìn)口自己庫(kù)存優(yōu)勢(shì) |
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?。?/div> |
詢價(jià) | ||
ST |
2016+ |
DIP16 |
8543 |
只做原裝,假一罰十,公司可開17%增值稅發(fā)票! |
詢價(jià) | ||
ST |
9832 |
DIP |
900 |
一級(jí)代理,專注軍工、汽車、醫(yī)療、工業(yè)、新能源、電力 |
詢價(jià) | ||
ST(意法) |
23+ |
NA |
20094 |
正納10年以上分銷經(jīng)驗(yàn)原裝進(jìn)口正品做服務(wù)做口碑有支持 |
詢價(jià) | ||
ST/意法 |
25+ |
25000 |
原廠原包 深圳現(xiàn)貨 主打品牌 假一賠百 可開票! |
詢價(jià) | |||
ST/意法 |
21+ |
DIP16 |
7500 |
只做原裝所有貨源可以追溯原廠 |
詢價(jià) | ||
ST |
24+ |
DIP |
17500 |
原裝現(xiàn)貨 自家?guī)齑?歡迎來電 |
詢價(jià) | ||
ST |
2017+ |
DIP-16 |
6523 |
只做原裝正品!現(xiàn)貨或訂貨! |
詢價(jià) | ||
ST/ |
22+23+ |
DIP-16P |
8000 |
新到現(xiàn)貨，只做原裝進(jìn)口 |
詢價(jià) |
