- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375327 > AN8028 (PANASONIC CORP) Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC PDF資料下載
參數(shù)資料
| 型號(hào)： | AN8028 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC |
| 中文描述： | 1 A SWITCHING CONTROLLER, PSIP9 |
| 封裝： | PLASTIC, SIP-9 |
| 文件頁(yè)數(shù)： | 11/13頁(yè) |
| 文件大?。?/td> | 133K |
| 代理商： | AN8028 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)當(dāng)前第11頁(yè)第12頁(yè)第13頁(yè)
11
Voltage Regulators
AN8028
I
Application Notes (continued)
[1] Operation descriptions (continued)
8. Timer latch (continued)
0
I
DS
Power MOSFET
current
Time
0
V
OVP
OVP
V
TH
=
7.3 V (typ.)
Figure 10. Timer latch basic operation
TIM/OVP
terminal voltage
Time
0
V
O
Power supply
output voltage
Time
Power supply stop
Power supply stop
Power supply stop
9. Output block
In order to drive the power MOSFET which is a capacitive load at high speed, this IC is adopting the totem pole
(push-pull) type output circuit which performs the sink and source of the current with the NPN transistor as
shown in figure 11.
The maximum sink/source current is
±
0.1 A (DC) and the current at peak is
±
1.0 A (peak). The circuit is
provided with the sink capability even if the supply voltage V
CC
is under the stop voltage so that it turns off the
power MOSFET without fail.
The peak current capability is mainly required
and a particularly too large current is not required
constantly.
Because the power MOSFET becomes a ca-
pacitive load for the output, a large peak current
is required for driving it at a high speed. How-
ever, after the charge and discharge, a particularly
large current is not required to keep such condi-
tion. In the case of this IC, the peak current capa-
bility of
±
1 A is ensured by taking a capacitance
value of the power MOSFET used into account.
The parasitic LC of the power MOSFET may produce ringing to decrease the output pin under the GND
potential. When the voltage decrease of the output pin becomes larger than the voltage drop of diode and its
voltage becomes negative, the parasitic diode consisting of the substrate and collector of the output NPN turns
on. This phenomenon can cause the malfunction of device. In such a case, the Schottky barrier diode should be
connected between the output and GND.
Schottky barrier
diode
Figure 11
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AN8029 | Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC |
| AN8031 | Active filter control IC |
| AN8032 | Active filter control IC |
| AN8038S | AC-DC switching power supply control IC with RCC local resonance circuit for improved conformance with energy conservation laws |
| AN8041S | Liquid crystal backlight control IC |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AN8029 | 制造商:Panasonic Industrial Company 功能描述:IC PANASONIC |
| AN8031 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Active filter control IC |
| AN8031-6-080 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| AN8031AH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
| AN8032 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Active filter control IC |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。