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CM3512-04SN PDF预览

CM3512-04SN

更新时间： 2024-11-20 22:40:15
品牌 Logo 应用领域
CALMIRCO 开关
页数 文件大小 规格书
11页 139K
描述
Dual USB Overcurrent 1.2A Switches with Independent Controls

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CM3512-04SN 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：SOP,
针数：8Reach Compliance Code：unknown
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.33可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G8
长度：4.9 mm信道数量：1
功能数量：1端子数量：8
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：SOP
封装形状：RECTANGULAR封装形式：SMALL OUTLINE
认证状态：Not Qualified座面最大高度：1.75 mm
最大供电电压 (Vsup)：5.5 V最小供电电压 (Vsup)：4.5 V
标称供电电压 (Vsup)：5 V表面贴装：YES
温度等级：INDUSTRIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
宽度：3.9 mm

CM3512-04SN 数据手册

 浏览型号CM3512-04SN的Datasheet PDF文件第2页浏览型号CM3512-04SN的Datasheet PDF文件第3页浏览型号CM3512-04SN的Datasheet PDF文件第4页浏览型号CM3512-04SN的Datasheet PDF文件第5页浏览型号CM3512-04SN的Datasheet PDF文件第6页浏览型号CM3512-04SN的Datasheet PDF文件第7页 
Preliminary  
CM3512  
CALIFORNIA MICRO DEVICES  
Dual USB Overcurrent 1.2A Switches with Independent Controls  
The CM3512 also prevents backdrive current  
Features  
flowing into the host from the connected peripheral.  
•
Dual switches, each with independent over-current  
protection and flag indicator, for 4 USB ports  
Two active low Enable controls, one per output  
Up to 1.2A continuous current each output  
Over-current limits at 1.2A min  
This can occur when VCC is removed as the host  
powers down, and the peripheral still has normal  
power applied. The 5V from the peripheral can  
therefore be linked to the host’s VBUS, potentially  
causing backdrive current into the host and  
overloading the peripheral power supply.  
•
•
•
•
10msec min fault blanking delay on OC# outputs  
prevents false overcurrent alarms  
•
•
•
•
Prevents backdrive current when host powered off  
Low operating current (95µA typ.)  
Pin Diagram  
GND  
VCC  
OC1#  
TOP  
Low quiescent current when disabled (<1µA max)  
VOUT1  
VOUT2  
OC2#  
Small 8-Lead SOIC package  
SOIC-8  
EN1#  
Applications  
•
PC’s, Notebooks, STBs  
EN2#  
Product Description  
Typical Application Circuit  
California Micro Devices CM3512 is a dual channel  
USB overcurrent power switch that provides 5V  
power to four independent USB ports. The device  
has two power switches that provide the VBUS  
voltage at each USB output port with minimal  
voltage drop.  
GND  
VCC  
OC1#  
VOUT1  
VOUT2  
OC2#  
VBUS  
VCC  
2 USB Ports  
2 USB Ports  
When either of the EN# inputs is at logic low, the  
corresponding power switch is ON and VCC is  
connected to the corresponding output through the  
switch. When either of the EN# inputs is at logic  
high, the corresponding power switch is OFF, and  
no power is available at the output.  
EN1#  
EN2#  
VBUS  
Both of the power switches have full over-current  
protection. Whenever the current limit out of either  
switch is exceeded, the device enters a constant-  
current mode, and the output voltage is  
progressively reduced to prevent the current from  
increasing further. Each switch is independent of the  
other, so if a switch is on but is not in overcurrent  
mode then it will remain switched on. The OC#  
output becomes active low only if the overcurrent  
condition exceeds a minimum continuous duration of  
10ms. This fault blanking delay prevents false  
alarms being reported to the host USB controller.  
Simplified Electrical Schematic  
Charge  
Pump  
EN1#  
OC1#  
VOUT1  
Over  
current  
protect  
If the overcurrent condition is severe enough that  
the part heats up to the thermal limit TMAX, then that  
switch will be turned off and the device temperature  
cools down. At TMIN the switch then turns on again,  
and the device heats up again to TMAX, and so on,  
until the fault is removed.  
Charge  
Pump  
EN2#  
VCC  
Over  
current  
protect  
VOUT2  
OC2#  
© 2003 California Micro Devices Corp. All rights reserved.  
C0970500  
11/10/03  
430 N. McCarthy Blvd, Milpitas, California 95035  
Tel: (408) 263-3214  
Fax: (408) 263-7846  
www.calmicro.com  
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