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參數(shù)資料
| 型號： | BL8501 |
| 廠商： | 上海貝嶺股份有限公司 |
| 英文描述： | Step down DC/DC controller |
| 中文描述： | 降壓DC / DC控制器 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 421K |
| 代理商： | BL8501 |
http://www.belling.com.cn
- 4-
8/8/2006
Total
10
Pages
BL8501
TYPICAL APPLICATION AND APPLICATION HINTS
Example: Output Voltage=3.3V
PMOS: SI9435
L: 27
H
SD1: 1N5817
C1: 10
C2: 0.1
C3: 47
F (Ceramic Type or Electrolytic Type)
F (Ceramic Type or Electrolytic Type)
F (Tantalum Type)
C4: 1000pF (Ceramic Type)
R1=10
, R2=14.3k
, R3=2.7k
, R4=33k
When you use this chip, consider the following issues:
As shown in the block diagram, a parasitic diode is formed in the terminal, this diode is not
formed for load current, therefore do not use it in such a way. When you control the CE pin
by another power supply, do not make its “H” level more than the voltage level of
IN
V
pin.
Set external components as close as possible to the IC and minimize the connection
between the components and the IC. In particular, a capacitor should be connected to
OUT
V
pin with the minimum connection. Make sufficient ground and reinforce supplying. A large
switching current could flow through the connection of power supply, an inductor and the
connection of
OUT
V
. If the impedance of the connection of power supply is high, the voltage
level of power supply of the IC fluctuates with the switching current. This may cause unstable
operation of the IC.
Protection circuit may work if the maximum duty cycle continues for the time defined in the
electrical characteristics. Once after stopping the output voltage, output will restart with
soft-start operation. If the difference between input voltage and output voltage is small, the
protection circuit may work.
Use capacitors with a capacity of 47
F or more for
OUT
V
pin, and with good high
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BL8503 | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:250mA CMOS Low Dropout Voltage Low consumption Regulator |
| BL8503-12C1AB | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:250mA CMOS Low Dropout Voltage Low consumption Regulator |
| BL8503-12C1RM | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:250mA CMOS Low Dropout Voltage Low consumption Regulator |
| BL8503-12C1SA | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:250mA CMOS Low Dropout Voltage Low consumption Regulator |
| BL8503-12C1SM | 制造商:BELLING 制造商全稱:SHANGHAI BELLING CO., LTD. 功能描述:250mA CMOS Low Dropout Voltage Low consumption Regulator |
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