L4990D中文資料意法半導(dǎo)體數(shù)據(jù)手冊PDF規(guī)格書
L4990D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：
L4990D
- 制造商：
STMICROELECTRONICS
- 制造商全稱：
STMicroelectronics
- 功能描述：
PRIMARY CONTROLLER
| 供應(yīng)商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
|---|---|---|---|---|---|---|---|
ST/意法 |
23+ |
NA/ |
25133 |
原裝現(xiàn)貨,當(dāng)天可交貨,原型號開票 |
詢價 | ||
ST |
22+23+ |
SOP-167.2 |
8318 |
絕對原裝正品全新進口深圳現(xiàn)貨 |
詢價 | ||
ST |
20+ |
SOP16 |
2960 |
誠信交易大量庫存現(xiàn)貨 |
詢價 | ||
ST |
SOP-20 |
68900 |
原包原標(biāo)簽100%進口原裝常備現(xiàn)貨! |
詢價 | |||
ST |
23+ |
SOP-16 |
3200 |
全新原裝、誠信經(jīng)營、公司現(xiàn)貨銷售! |
詢價 | ||
ST |
1948+ |
SOP16 |
6852 |
只做原裝正品現(xiàn)貨!或訂貨假一賠十! |
詢價 | ||
ST |
24+ |
SOP-16 |
4652 |
公司原廠原裝現(xiàn)貨假一罰十!特價出售!強勢庫存! |
詢價 | ||
NS |
2315+ |
QFN |
3335 |
優(yōu)勢代理渠道,原裝現(xiàn)貨,可全系列訂貨 |
詢價 | ||
ST/意法 |
2402+ |
SOP16 |
8324 |
原裝正品!實單價優(yōu)! |
詢價 | ||
ST |
22+ |
SO-16 |
5000 |
原裝現(xiàn)貨庫存.價格優(yōu)勢!! |
詢價 |
