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參數(shù)資料
| 型號： | AN8032 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 模擬信號調理 |
| 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)： | 7/21頁 |
| 文件大?。?/td> | 206K |
| 代理商： | AN8032 |
7
Voltage Regulators
AN8032
I
Application Notes (continued)
[2] Operation descriptions (continued)
1. Normal control (continued)
2) Control outline description (Refer to figure 2 and figure 3.)
(1) Input voltage (E
IN
) detection
The voltage which is divided from the input voltage of chopper circuit (E
IN
) by using the external
resistor is input to the multiplier input terminal of the AN8032 (MPI terminal).
(2) Output voltage (E
OUT
) detection
The voltage which is divided from the output voltage of chopper circuit (E
OUT
) by using the external
resistor is amplified by the error amplifier of the AN8032 (Input to noninverting input terminal (EI
terminal)) and input to another multiplier input (EO terminal, which also functions as output for error
amplifier).
(3) Multiplication of input voltage and output voltage
The signals input to the multiplier are multiplied and outputted from the multiplier. This output is a
signal which monitors both the input voltage and output voltage of the chopper circuit.
Figure 2. Explanation of normal control operation
MPI
input voltage
EI
input voltage
Multiplier output
(MPO) voltage
Transformer reset
voltage detection (V
B
)
0 V
0 V
Approx. 2.5 V typ.
0 V
Time
Time
Time
Time
0 V
Enlarged
0 V
Time
Power MOS turned off
V
B
lower limit voltage (regulated inside IC)
Power MOS turned on
=
bias coil voltage
generated
Reset operation of transformer
=
bias coil
voltage inversion
V
B
lower limit voltage (regulated inside IC)
Multiplier output (MPO) voltage
Power MOSFET current detection
(CS) voltage
Power MOS turned off
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