- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370418 > HA17385HPS (Hitachi,Ltd.) High Speed Current Mode PWM Control IC for Switching Power Supply PDF資料下載
參數(shù)資料
| 型號： | HA17385HPS |
| 廠商： | Hitachi,Ltd. |
| 元件分類： | 基準(zhǔn)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(guān)電源電流模式PWM控制IC |
| 文件頁數(shù)： | 27/31頁 |
| 文件大?。?/td> | 145K |
| 代理商： | HA17385HPS |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁當(dāng)前第27頁第28頁第29頁第30頁第31頁
HA17384SPS/SRP, HA17384HPS/HRP, HA17385HPS/HRP
27
2. OVP latch output overvoltage protection (the HA17384H and HA17385H only)
The OVP latch is incorporated in the error amp input pin (FB). If the FB pin is pulled up to 7.0 V typ.
just once when the power supply enters any kind of error state, IC operation can be halted and held as it
is (latched). To reset the latch, drop the IC’s supply voltage to 7.0 V typ. or below momentarily.
An OVP latch application example is shown in figure 15.
+EA
V
IN
R
2
47k
2
2.5V
Inside IC
OVP comparator
FB
Error amplifier
+OVP
7.0V
COMP
1
R
1
10k
HA17431
(Vref
≈
2.5V)
1k
2SA1029
R
10k
External circuit
(only partially shown)
Figure 15 Example of OVP Latch Application Circuit
This circuit protects the system by causing latch operation in the event of an overload or load short. In
the steady state, the error amp input/output pins operate at 2.5 V typ., but if the load becomes heavy the
FB pin level drops and the COMP pin level rises. As shown in the figure, this is detected by the
HA17431 shunt regulator, and the FB pin level is pulled up, operating the OVP latch.
The operation parameters are as follows:
COMP pin voltage detection level: Vth = (R
1
+ R
2
) / R
2
×
2.5 V
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HA17384 | 250000 SYSTEM GATE 1.5 VOLT FPGA |
| HA17393 | Dual Comparator |
| HA17903FPK | Dual Comparator |
| HA17393F | Dual Comparator |
| HA17903 | 500000 SYSTEM GATE 1.5 VOLT FPGA |
相關(guān)代理商/技術(shù)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. |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。