L4990中文資料意法半導(dǎo)體數(shù)據(jù)手冊(cè)PDF規(guī)格書
L4990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)：
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 | 庫存 | 備注 | 價(jià)格 |
|---|---|---|---|---|---|---|---|
ST/意法 |
22+ |
SOP16 |
100000 |
代理渠道/只做原裝/可含稅 |
詢價(jià) | ||
ST/意法 |
23+ |
NA/ |
610 |
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 |
23+ |
DIP16 |
20000 |
原廠原裝正品現(xiàn)貨 |
詢價(jià) | ||
ST/意法 |
00+ |
DIP-16 |
880000 |
明嘉萊只做原裝正品現(xiàn)貨 |
詢價(jià) | ||
ST |
22+23+ |
SOP-167.2 |
8318 |
絕對(duì)原裝正品全新進(jìn)口深圳現(xiàn)貨 |
詢價(jià) | ||
ST |
589220 |
16余年資質(zhì) 絕對(duì)原盒原盤 更多數(shù)量 |
詢價(jià) | ||||
ST |
23+ |
SOP-16 |
3200 |
全新原裝、誠信經(jīng)營、公司現(xiàn)貨銷售! |
詢價(jià) | ||
ST/意法 |
2403+ |
DIP |
11809 |
原裝現(xiàn)貨!歡迎隨時(shí)咨詢! |
詢價(jià) | ||
ST |
22+ |
DIP |
5000 |
原裝現(xiàn)貨庫存.價(jià)格優(yōu)勢(shì)!! |
詢價(jià) | ||
ST |
17+ |
DIP |
6200 |
100%原裝正品現(xiàn)貨 |
詢價(jià) |
