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參數(shù)資料
| 型號(hào)： | AN8027 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | AC-DC switching power supply control IC with standby mode |
| 中文描述： | 1 A SWITCHING CONTROLLER, 80 kHz SWITCHING FREQ-MAX, PSIP9 |
| 封裝： | PLASTIC, SIP-9 |
| 文件頁數(shù)： | 5/28頁 |
| 文件大?。?/td> | 301K |
| 代理商： | AN8027 |
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5
Voltage Regulators
AN8027, AN8037
Pin No. Pin name
I/O
Explanation
Equivalent Circuit
1
TR
I
Transformer reset detection input. When the
IC detects transformer resetting and the fall-
ing edge of a high-level signal is input to
this pin of the AN8037 or a low-level signal
is input to the same pin of the AN8027, the
level of the Out pin becomes high. However,
the transformer reset signal is ignored if the
signal is shorter than the minimum off-pe-
riod determined by the CF pin. Also note
that the maximum on-period is corrected ac-
cording to the source currents.
2
OCP
Connection for the resistor that determines
the overload level of the IC to activate the
timer latch protection circuit.
By judging the operating mode (i.e., the nor-
mal or standby mode) of the IC from the
secondary side, the timer period is adjusted
with the selection of external resistance ac-
cording to the operating mode.
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 corre-
sponds to the current at FB pin.
4
CLM
I
Input to the pulse-by-pulse overcurrent pro-
tection circuit.
Normally, we recommend adding an external
filter for this input. If overcurrent continues
for several cycles, the IC determines that the
operation is erroneous, thus triggering the
latch protection function.
5
GND
IC ground.
I
Pin Descriptions
High-side
clamp
Low-side
clamp
V
REF
1
V
REF
CF
Comp.
2
V
REF
V
FB
I
OFF
I
ON
Comp.
3
V
REF
CLM(
)
Comp.
4
5
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相關(guān)代理商/技術(shù)參數(shù) |
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| AN-8027 | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:PFC+PWM Combination Controller |
| AN8027/AN8037 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:AN8027. AN8037 - AC-DC switching power supply control IC with standby mode |
| AN8028 | 制造商:PANASONIC 制造商全稱:Panasonic Semiconductor 功能描述:Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC |
| 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 |
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