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參數(shù)資料
| 型號： | AN8038S |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | AC-DC switching power supply control IC with RCC local resonance circuit for improved conformance with energy conservation laws |
| 中文描述： | 2 A SWITCHING CONTROLLER, PDSO8 |
| 封裝： | 0.225 INCH, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 6/22頁 |
| 文件大?。?/td> | 179K |
| 代理商： | AN8038S |
AN8038, AN8038S
Voltage Regulators
6
Pin No.
Equivalent Circuit
Description
I/O
2
RSTB:
Adjusts the light-load detection level that deter-
mines the time when the IC switches from RCC
to discontinuous operation. When the voltage
which is I-V conversion of current feedback sig-
nal goes up higher than this pin, operating fre-
quency is reduced.
An arbitrary level can be set by inserting an
external pull-down resistor.
3
CF:
Connection for the capacitor that determines the
on- and off-periods of the IC output (Out).
The on- and off-periods are corrected by I
ON
which is proportional to the flowing out cur-
rent at the TR pin, and I
OFF
which corresponds
to the current at IFB pin.
4
IFB:
Connection for the photocoupler used for the
power supply output error-voltage feedback.
This input can decrease the photocoupler dark
current by about 250
μ
A.
I
5
CLM:
Input to the pulse-by-pulse overcurrent protec-
tion circuit. Normally, we recommend adding
an external filter for this input.
I
6
GND:
IC ground.
I
Terminal Equivalent Circuits (continued)
Comp.
3
CF
V
REF
V
FB
I
OFF
I
ON
V
REF
20 k
1 k
×
5
×
1
V
FB
4
IFB
Comp.
5
CLM
V
REF
GND
6
Comp.
2
RSTB
17.5 k
17.5 k
V
REF
CF
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