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20BQ030 PDF预览

20BQ030

更新时间： 2024-02-12 15:22:08
品牌 Logo 应用领域
芯源 - MPS 转换器二极管光电二极管
页数 文件大小 规格书
10页 249K
描述
2A, 380 KHz Step-Down Converter

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20BQ030 技术参数

是否Rohs认证： 符合生命周期：Obsolete
零件包装代码：DO-214AA包装说明：LEAD FREE, SMB, SIMILAR TO DO-214AA, 2 PIN
针数：2Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8541.10.00.80
风险等级：7.31其他特性：HIGH RELIABILITY, FREE WHEELING DIODE
应用：GENERAL PURPOSE配置：SINGLE
二极管元件材料：SILICON二极管类型：RECTIFIER DIODE
最大正向电压 (VF)：0.37 VJEDEC-95代码：DO-214AA
JESD-30 代码：R-PDSO-C2JESD-609代码：e3
湿度敏感等级：1最大非重复峰值正向电流：350 A
元件数量：1相数：1
端子数量：2最高工作温度：150 °C
最低工作温度：-55 °C最大输出电流：2 A
封装主体材料：PLASTIC/EPOXY封装形状：RECTANGULAR
封装形式：SMALL OUTLINE峰值回流温度（摄氏度）：260
认证状态：Not Qualified最大重复峰值反向电压：30 V
子类别：Rectifier Diodes表面贴装：YES
技术：SCHOTTKY端子面层：Matte Tin (Sn) - annealed
端子形式：C BEND端子位置：DUAL
处于峰值回流温度下的最长时间：10Base Number Matches：1

20BQ030 数据手册

 浏览型号20BQ030的Datasheet PDF文件第3页浏览型号20BQ030的Datasheet PDF文件第4页浏览型号20BQ030的Datasheet PDF文件第5页浏览型号20BQ030的Datasheet PDF文件第7页浏览型号20BQ030的Datasheet PDF文件第8页浏览型号20BQ030的Datasheet PDF文件第9页 
TM  
MP1580 – 2A, 380KHz STEP-DOWN CONVERTER  
Input Capacitor  
In the case of tantalum or low-ESR electrolytic  
capacitors, the ESR dominates the impedance  
at the oscillator frequency, therefore the output  
ripple is calculated as:  
The input current to the step-down converter is  
discontinuous, so a capacitor is required to  
supply the AC current to the step-down  
converter while maintaining the DC input  
voltage. A low ESR capacitor is required to  
keep the noise at the IC to a minimum. Ceramic  
capacitors are preferred, but tantalum or low-  
ESR electrolytic capacitors will also suffice.  
VRIPPLE ≅ ∆I×RESR  
Where VRIPPLE is the output voltage ripple and  
RESR is the equivalent series resistance of the  
output capacitors.  
The input capacitor value should be greater  
than 10µF. The capacitor can be electrolytic,  
tantalum or ceramic. However, since it absorbs  
the input switching current it requires an  
adequate ripple current rating. Its RMS current  
rating should be greater than approximately 1/2  
of the DC load current.  
Output Rectifier Diode  
The output rectifier diode supplies the current to  
the inductor when the upper transistor M1 is off.  
To reduce losses due to the diode forward  
voltage and recovery times, use a Schottky  
rectifier.  
Table 2 provides the Schottky rectifier part  
numbers based on the maximum input voltage  
and current rating.  
To ensure stable operation, C1 should be  
placed as close to the IN pin as possible.  
Alternately, a smaller high quality ceramic  
0.1µF capacitor may be placed closer to the IN  
pin and a larger capacitor placed further away.  
If using this technique, it is recommended that  
the larger capacitor be a tantalum or electrolytic  
type capacitor. All ceramic capacitors should be  
placed close to the MP1580.  
Table 2—Schottky Rectifier Selection Guide  
2A Load Current  
VIN (Max)  
Part Number  
30BQ015  
B220  
Vendor  
15V  
20V  
4
1
Output Capacitor  
SK23  
6
The output capacitor is required to maintain the  
DC output voltage. Low ESR capacitors are  
preferred to keep the output voltage ripple low.  
The characteristics of the output capacitor also  
affect the stability of the regulation control  
system. Ceramic, tantalum or low ESR  
electrolytic capacitors are recommended. In the  
case of ceramic capacitors, the impedance at  
the oscillator frequency is dominated by the  
capacitance, so the output voltage ripple is  
mostly independent of the ESR. The output  
voltage ripple is estimated to be:  
SR22  
6
20BQ030  
B230  
4
1
26V  
SK23  
6
SR23  
3, 6  
2, 3  
SS23  
Table 3 lists some rectifier manufacturers.  
Table 3—Schottky Diode Manufacturers  
Vendor  
Web Site  
2
Diodes, Inc.  
www.diodes.com  
f
⎛
⎞
LC  
⎜
⎜
⎟
⎟
VRIPPLE ≅ 1.4 × VIN  
×
Fairchild Semiconductor www.fairchildsemi.com  
General Semiconductor www.gensemi.com  
f
⎝
⎠
Where VRIPPLE is the output ripple voltage, fLC is  
the resonant frequency of the LC filter and f is  
the oscillator frequency.  
International Rectifier  
On Semiconductor  
Pan Jit International  
www.irf.com  
www.onsemi.com  
www.panjit.com.tw  
Choose a rectifier that has a maximum reverse  
voltage rating greater than the maximum input  
voltage, and a current rating greater than the  
maximum load current.  
MP1580 Rev. 3.0  
12/5/2005  
www.MonolithicPower.com  
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.  
© 2005 MPS. All Rights Reserved.  
6
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