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L4990AD PDF预览

L4990AD

更新时间: 2024-09-15 22:51:55
品牌 Logo 应用领域
意法半导体 - STMICROELECTRONICS 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
24页 323K
描述
PRIMARY CONTROLLER

L4990AD 技术参数

是否Rohs认证: 不符合生命周期:Obsolete
零件包装代码:SOIC包装说明:SO-16
针数:16Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.89Is Samacsys:N
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:CURRENT-MODE
控制技术:PULSE WIDTH MODULATION最小输入电压:8.2 V
标称输入电压:15 VJESD-30 代码:R-PDSO-G16
JESD-609代码:e0长度:10.3 mm
功能数量:1端子数量:16
最高工作温度:70 °C最低工作温度:
最大输出电流:1.5 A标称输出电压:2.5 V
封装主体材料:PLASTIC/EPOXY封装代码:SOP
封装等效代码:SOP16,.4封装形状:RECTANGULAR
封装形式:SMALL OUTLINE峰值回流温度(摄氏度):NOT SPECIFIED
认证状态:Not Qualified座面最大高度:2.65 mm
子类别:Switching Regulator or Controllers最大供电电流 (Isup):18 mA
表面贴装:YES切换器配置:BUCK
最大切换频率:1000 kHz技术:BCDMOS
温度等级:COMMERCIAL端子面层:Tin/Lead (Sn/Pb)
端子形式:GULL WING端子节距:1.27 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:7.5 mmBase Number Matches:1

L4990AD 数据手册

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L4990  
L4990A  
PRIMARY CONTROLLER  
CURRENT-MODE CONTROL PWM  
SWITCHING FREQUENCY UP TO 1MHz  
LOW START-UP CURRENT < 0.45mA  
HIGH-CURRENT OUTPUT DRIVE SUITABLE  
FOR POWER MOSFET (1A)  
MULTIPOWER BCD TECHNOLOGY  
FULLY LATCHED PWM LOGIC WITH DOU-  
BLE PULSE SUPPRESSION  
PROGRAMMABLE DUTY CYCLE  
100% AND 50% MAXIMUM DUTY CYCLE  
LIMIT  
DIP16  
SO16W  
PROGRAMMABLE SOFT START  
ORDERING NUMBERS:  
L4990/L4990A(DIP16)  
L4990D/L4990AD (SO16W)  
PRIMARY OVERCURRENT FAULT DETEC-  
TION WITH RE-START DELAY  
PWM UVLO WITH HYSTERESIS  
IN/OUT SYNCHRONIZATION  
DISABLE LATCHED  
INTERNAL 100ns LEADING EDGE BLANK-  
ING OF CURRENT SENSE  
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 pro-  
grammable 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.  
PACKAGE: DIP16 AND SO16W  
DESCRIPTION  
This primary controller I.C., developed in BCD60II  
technology, has been designed to implement off  
BLOCK DIAGRAM  
VCC  
SYNC  
DC-LIM  
15  
VREF  
4
1
8
2
TIMING  
RCT  
25V  
Vref  
+
-
3
+
-
DC  
T
16V/10V  
PWM UVLO  
14  
9
-
DIS  
DIS  
VC  
+
2.5V  
13V  
10  
OUT  
BLANKING  
PWM  
S
Q
R
OVER CURRENT  
VREF OK  
CLK  
DIS  
11  
5
13  
PGND  
VFB  
FAULT  
SOFT-START  
ISEN  
SS  
+
-
1.2V  
2.5V  
7
+
E/A  
-
2R  
1V  
R
12  
6
D98IN1002  
SGND  
COMP  
1/24  
July 1999  

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