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NJW4120M PDF预览

NJW4120M

更新时间： 2024-02-16 19:53:33
品牌 Logo 应用领域
NJRC ISM频段信息通信管理光电二极管
页数 文件大小 规格书
20页 311K
描述
Power Supply Support Circuit, Adjustable, 1 Channel, BICMOS, PDSO20, DMP-20

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中文翻译

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NJW4120M 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Active零件包装代码：SOIC
包装说明：SSOP,针数：20
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.69
其他特性：OVER VOLTAGE PROTECTION可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G20
JESD-609代码：e6长度：10 mm
信道数量：1功能数量：1
端子数量：20最高工作温度：85 °C
最低工作温度：-20 °C封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：260
认证状态：Not Qualified座面最大高度：2 mm
最大供电电压 (Vsup)：14 V最小供电电压 (Vsup)：2.7 V
标称供电电压 (Vsup)：5 V表面贴装：YES
技术：BICMOS温度等级：OTHER
端子面层：TIN BISMUTH端子形式：GULL WING
端子节距：0.95 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：5 mm
Base Number Matches：1

NJW4120M 数据手册

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NJW4120  
2. Voltage Detection Block (VS pin)  
The VS pin determines charge voltage, low voltage, over voltage, and re-charge voltage. Battery voltage conditions are  
constantly monitored. (Figure 2)  
2-1. Charge Voltage (VS pin)  
Charge voltage VBAT is set using the VS pin external  
resistors RB1 and RB2 and the following equation:  
Charge Voltage  
Control Amp  
RB1+ RB2  
VBAT  
=
x VREF-CV (2.1V)  
RB1  
RB2  
To OR  
Circuit  
RB2  
VS  
VREF2  
Using the following settings makes it easy to support  
applications for one or two cells: for one cell, RB1= RB2;  
for two cells, RB1=3 x RB2.  
CVCC-ON  
Control Block  
Quick Charge  
Detection  
1-cell  
: RB1 = RB2  
VBAT x 0.73  
2-cell RB1 = 3xRB2  
:
If you use a high resistance, the VS pin's bias current will  
cause incorrect values. Use as low a resistance as  
possible.  
Recharge  
Detection  
Battery  
Voltage  
Detection  
V
BAT x 0.95  
Over Voltage  
Detection  
To Charge  
VBAT x 1.025  
VBAT x 0.525  
Low Voltage  
Detection  
2-2. Overcharge Detection Block (VS pin)  
The overcharge detection block stops charging when a  
high voltage is detected at the VS pin.  
Figure 2. Voltage Detection Block Configuration  
The overcharge detection voltage is obtained with the following equation:  
VOV=VBAT × 1.025 (typ.)  
When overcharge is detected, charging is prohibited and LED-R blinks. After that, charge will continue to be prohibited, even  
after battery voltage drops to a normal value. Turning the power off to release UVLO, battery connection detection, or  
CHG-SW switching will enable the charge sequence to restart.  
2-3. Low Voltage Detection (2mA charge) Block (VS pin, CS1 pin)  
The low voltage detection block detects an  
over-discharged battery, or an open battery caused by  
the battery protection circuit or the like. This will  
2mA Charge  
determine a 2mA charge prior to pre-charging.  
Current  
The low voltage detection voltage is obtained with the  
To Charge Current  
Control Amp  
12dB  
CS1  
CS2  
Rcs  
following equation:  
2mA Charge  
VLV=VBAT × 0.525 (typ.)  
During a 2mA charge, the block monitors battery voltage  
recovery while a steady 2mA current is output from the  
CS1 pin. (Figure 3)  
Low Voltage  
Detection  
RB1  
RB2  
VBAT x 0.525  
VS  
Control Block  
If voltage does not recover within a prescribed time, the  
timer will prohibit 2mA charging. Turning the power off to  
release UVLO, battery connection detection, or CHG-SW  
switching will enable the charge sequence to restart.  
To Charge  
Output  
Figure 3. 2mA Charging Block  
2-4. Re-Charge Detection (VS pin)  
When a fully charged battery is left for a long period of time, voltage will drop due to self-discharge. The re-charge detection  
block detects a drop in voltage and re-charges the battery.  
The re-charge detection voltage is obtained with the following equation.  
VR-CHG=VBAT × 0.95 (typ.)  
Ver.2013-02-12  
- 10 -  
1...78910111213...20

中文翻译

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