L4990A中文资料PDF规格书
L4990A规格书详情
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
产品属性
- 型号:
L4990A
- 制造商:
STMICROELECTRONICS
- 制造商全称:
STMicroelectronics
- 功能描述:
PRIMARY CONTROLLER
供应商 | 型号 | 品牌 | 批号 | 封装 | 库存 | 备注 | 价格 |
---|---|---|---|---|---|---|---|
ST/意法 |
22+ |
DIP16 |
2769 |
绝对原装!公司现货! |
询价 | ||
ST/意法 |
DIP16 |
12000 |
原装现货,长期供应,终端账期支持 |
询价 | |||
ST |
2320+ |
DIP16 |
562000 |
16年只做原装原标渠道现货终端BOM表可配单提供样品 |
询价 | ||
ST(意法) |
23+ |
NA |
20094 |
正纳10年以上分销经验原装进口正品做服务做口碑有支持 |
询价 | ||
ST/意法 |
22+ |
DIP16 |
37485 |
郑重承诺只做原装进口现货 |
询价 | ||
ST |
22+ |
DIP-16 |
5000 |
原装现货库存.价格优势!! |
询价 | ||
ST |
23+ |
QFP |
3200 |
全新原装、诚信经营、公司现货销售! |
询价 | ||
ST/意法 |
22 |
DIP16 |
15000 |
3月31原装,微信报价 |
询价 | ||
ST |
23+ |
DIP16 |
32732 |
原装正品代理渠道价格优势 |
询价 | ||
ST/STMicroelectronics/意法半导 |
21+ |
DIP16 |
3000 |
优势代理渠道,原装正品,可全系列订货开增值税票 |
询价 |