- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄375327 > AN8031 (PANASONIC CORP) Active filter control IC PDF資料下載
參數(shù)資料
| 型號： | AN8031 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | Active filter control IC |
| 中文描述： | SPECIALTY ANALOG CIRCUIT, PSIP9 |
| 封裝： | PLASTIC, SIP-9 |
| 文件頁數(shù)： | 12/21頁 |
| 文件大?。?/td> | 205K |
| 代理商： | AN8031 |
12
AN8031
Voltage Regulators
I
Application Notes (continued)
[2] Operation descriptions (continued)
1. Normal control (continued)
3) Description of each function (continued)
(4)
EI/EO
The resisitance-devided voltage of the active filter output is input to the EI. The EI is the error
amplifier's inverted input, and the temperature-compensated reference voltage (2.5 V typical) is input as
the noninverted input. The error amplifier amplifies the error amount between the output voltage, and the
reference voltage and outputs to the multiplier. The resistor between the EI and EO is used for determin-
ing the gain of error amplifier.
As for the resistance-dividing for decreasing the active filter's output voltage to the input D-range of
EI, if an attempt is made to use a small-sized resistor for suppressing the dissipation, its resistance value
becomes high because of the high output voltage. For this reason, note that if the capacitance inserted
between the EI and EO for phase compensation is large, the delay element between it and the resistance-
divider of high resistance becomes large, so that the characteristics at the time of sudden change of load
(overshoot or undershoot) is degraded.
Therefore, as the value for phase compensation capacitor, select the minimum value with which the
oscillation can be prevented.
(5)
V
OUT
For the drive circuit, the AN8031 employs the totem pole type by which the power MOSFET can be
directly driven. Since the peak output current is
±
1 A, the TO-220 class power MOSFET can be driven.
For the TOP-3 class, the buffer circuit should be added outside because its capability is not sufficient for
that class.
The power MOSFET momentarily swings to minus due to the parasitic capacitance between the
drain and gates at the time of turn-off and this causes malfunction in some cases. Therefore, the Schottky
barrier diode should be inserted between the V
OUT
and GND if necessary.
E
Reference voltage
(2.5 V typ.)
Output
Resistor determining the gain
Error amplifier
To multiplier
5
4
EI
Figure 7. EI/EO terminal description
SBD
Phase compensation capacitor
Figure 8.
V
OUT
terminal description
GND
PV
CC
Swing to negative voltage
0 V
Parasitic
capacitance
V
OUT
T
o
Power
MOSFET
0 V
Capacitive coupling
V
G
V
G
V
D
Off
On
V
D
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 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 |
| AN8049 | 1.8-volt 3-channel step-up, step-down, and polarity inverting DC-DC converter control IC |
| AN8049SH | Dual 14-Bit nanoDAC® with 5 ppm/°C On-Chip Reference; Package: MSOP; No of Pins: 10; Temperature Range: Automotive |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| AN8032AH | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller |
| AN-8033 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:Primary Side Regulated (PSR) Flyback Converter |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。