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參數(shù)資料
| 型號： | HA17385HPS |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | High Speed Current Mode PWM Control IC for Switching Power Supply |
| 中文描述： | 高速開關電源電流模式PWM控制IC |
| 文件頁數(shù)： | 29/31頁 |
| 文件大?。?/td> | 145K |
| 代理商： | HA17385HPS |
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HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP
29
Output
Input
Time constant
circuit
Feedback
HA17384
Series
V
IN
V
18V
R
B
51
C
N
C
B
1
μ
F
GND
+
Figure 17 Sample Remedial Circuit
2. Externally Synchronized Operation
Case
When, with a power supply using the HA17384S/H or HA17385H, externally synchronized operation is
performed by applying an external syncronous signal to the R
T
/C
T
pin (pin 4).
Problem
Synchronized operation may not be possible if the amplitude of the external syncronous signal is too
large.
Reason
The R
T
/C
T
pin falls to a potential lower than the ground.
Remedy (counter measure)
In this case, clamping is necessary using a diode with as small a V
F
value as possible, such as a schottky
barrier diode, as shown in figure 18.
Vref
0.01
μ
F
R
T
C
T
47
HA17384
Series
External
synchronous
signal
Figure 18 Sample Remedial Circuit
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| HA17903FPK | Dual Comparator |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| HA17385HPS/HRP | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:High Speed Current Mode PWM Control IC for Switching Power Supply |
| HA17385HRP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:High Speed Current Mode PWM Control IC for Switching Power Supply |
| HA17385HRP(E) | 制造商:Renesas Electronics Corporation 功能描述: |
| HA17385PS | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Current-Mode SMPS Controller |
| HA17393 | 制造商:Panasonic Industrial Company 功能描述:I.C. |
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