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參數資料
| 型號： | AN8021SB |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | AC-DC switching power supply control IC |
| 中文描述： | 1 A SWITCHING CONTROLLER, 225 kHz SWITCHING FREQ-MAX, PDSO16 |
| 封裝： | 0.225 INCH, PLASTIC, SSOP-16 |
| 文件頁數： | 5/16頁 |
| 文件大小： | 141K |
| 代理商： | AN8021SB |
5
Voltage Regulators
AN8021L, AN8021SB
Pin No.
Equivalent circuit
Description
I/O
6
V
OUT
:
The terminal for directly driving a power
MOSFET.
O
(2)
7
V
CC
, (PV
CC
), (SV
CC
):
Supply voltage terminal.
It monitors the supply voltage and has operat-
ing threshold value for start/stop/OVP reset.
(3)(4)
8
TIM/OVP:
The terminal with double functions such as OVP
(overcurrent protection) and timer latch termi-
nal.
[OVP]
When it receives the overvoltage signal of the
power supply output and high is input to the
terminal, internal circuit is turned off. At the
same time, this condition (latch) is hold. To re-
set the OVP latch, it is necessary to reduce V
CC
under the release voltage.
[Timer latch]
The output voltage drop due to the overcurrent
condition of power supply output is detected
through the current level for IFB-input. When
I
IFB
becomes less than current of a certain value,
charge current flows into the capacitor con-
nected to this terminal. When the capacitor is
charged to the threshold voltage of OVP, OVP
starts to operate and the IC stays stop.
I
(5)
9
IFB :
The terminal into which the current feedback
signal is input from the photocoupler of the
power supply output.
I
(6)
I
Terminal Equivalent Circuits (continued)
6 V
500
(5)
Comp.
SV
CC
5
μ
A
8
I/V
conversion
500
(6)
V
REF
9
PWM
comp.
Note) The number in ( ) shows the pin number for the AN8021SB.
(2)
PV
CC
6
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