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MP2370DJ

更新时间： 2024-02-01 11:03:31
品牌 Logo 应用领域
芯源 - MPS 光电二极管
页数 文件大小 规格书
8页 485K
描述
Switching Regulator, Current-mode, 1.8A, 1700kHz Switching Freq-Max, PDSO6, TSOT-23, 6 PIN

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MP2370DJ 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：TSSOP
包装说明：TSOT-23, 6 PIN针数：6
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.17
Base Number Matches：1

MP2370DJ 数据手册

 浏览型号MP2370DJ的Datasheet PDF文件第2页浏览型号MP2370DJ的Datasheet PDF文件第3页浏览型号MP2370DJ的Datasheet PDF文件第4页浏览型号MP2370DJ的Datasheet PDF文件第5页浏览型号MP2370DJ的Datasheet PDF文件第7页浏览型号MP2370DJ的Datasheet PDF文件第8页 
MP2370 – 1.2A, 24V, 1.4MHz STEP-DOWN WHITE LED DRIVER IN A TSOT23-6  
APPLICATION INFORMATION  
Selecting the Input Capacitor  
Setting LED Current  
The input capacitor reduces the surge current  
drawn from the input supply and the switching  
noise from the device. The input capacitor  
impedance at the switching frequency should be  
less than the output impedance of the input source  
to prevent high frequency switching current from  
passing through the input. Ceramic capacitors with  
X5R or X7R dielectrics are highly recommended  
because of their low ESR and small temperature  
coefficients. For most applications, a 4.7µF  
capacitor is sufficient.  
The current sense resistor is inserted between  
the anode of WLED and GND. The current  
sense resistor value is calculated as:  
0.15V  
R1 =  
ILED  
For 1A WLED current, choose R1 = 150mꢀ  
Selecting the Inductor  
A 1µH to 10µH inductor with a DC current rating  
of at least 25% percent higher than the  
maximum load current is recommended for  
most applications. For highest efficiency, the  
inductor’s DC resistance should be less than  
200mꢀ. Refer to Table 2 for suggested surface  
mount inductors. For most designs, the required  
inductance value can be derived from the  
following equation.  
Selecting the Output Capacitor  
The output capacitor keeps the output current  
ripple small and ensures feedback loop stability.  
The output capacitor impedance should be low  
at the switching frequency. Ceramic capacitors  
with X5R or X7R dielectrics are recommended  
for their low ESR characteristics. For most  
applications, a 2.2µF ceramic capacitor will be  
sufficient.  
VOUT × (VIN − VOUT  
VIN × ΔIL × fSW  
)
L =  
The MP2370 can also work properly without  
output capacitor by adding a small capacitor in  
the feedback loop (see Figure 2). The small  
capacitor is recommended 680pF.  
Where ΔIL is the inductor ripple current.  
Choose the inductor ripple current to be 30% of  
the maximum load current. The maximum  
inductor peak current is calculated from:  
PC Board Layout  
ΔIL  
The high current paths (GND, IN and SW) should  
be placed very close to the device with short,  
direct and wide traces. The input capacitor needs  
to be as close as possible to the IN and GND pins.  
The external feedback resistors should be placed  
next to the FB pin. Keep the switch node traces  
short and away from the feedback network.  
IL(MAX) = ILOAD  
+
2
Under light load conditions below 100mA, a  
larger inductance is recommended to improve  
efficiency. See Table 2 for suggested inductors.  
Also note that the maximum recommended load  
current is 1A if the duty cycle exceeds 35%.  
MP2370 Rev. 0.96  
9/21/2007  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2007 MPS. All Rights Reserved.  
6
1...345678

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MP2370DJ 替代型号

型号 品牌 替代类型 描述 数据表
MP2370DJ-LF MPS

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