參數(shù)資料
型號: HA17385HRP
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(開關(guān)電源的高速電流模式PWM控制芯片)
中文描述: 高速開關(guān)電源電流模式PWM控制IC(開關(guān)電源的高速電流模式的PWM控制芯片)
文件頁數(shù): 29/31頁
文件大小: 145K
代理商: HA17385HRP
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
相關(guān)PDF資料
PDF描述
HA17384HRP High Speed Current Mode PWM Control IC for Switching Power Supply
HA17384SRP High Speed Current Mode PWM Control IC for Switching Power Supply
HA17385HPS High Speed Current Mode PWM Control IC for Switching Power Supply
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HA17393 Dual Comparator
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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.
HA17393/ASERIES 制造商:未知廠家 制造商全稱:未知廠家 功能描述:
HA17393A 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:Dual Comparators