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參數(shù)資料
| 型號(hào)： | AN8028 |
| 廠商： | PANASONIC CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | Self-excited RCC pseudo-resonance type AC-DC switching power supply control IC |
| 中文描述： | 1 A SWITCHING CONTROLLER, PSIP9 |
| 封裝： | PLASTIC, SIP-9 |
| 文件頁(yè)數(shù)： | 3/13頁(yè) |
| 文件大小： | 133K |
| 代理商： | AN8028 |
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3
Voltage Regulators
AN8028
I
Electrical Characteristics at V
CC
=
18 V, T
a
=
25
°
C (continued)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
TON maximum on-period current
I
3TON
FB terminal
=
open
TON terminal
=
GND
135
110
85
μ
A
TON upper limit voltage
V
3TON/H
FB terminal
=
open
FB terminal
=
open
0.55
0.7
0.85
V
TON lower limit voltage
V
3TON/L
0.1
0.05
0.2
V
TOFF upper limit voltage
V
2TOFF/H
0.7
0.9
1.1
V
TOFF lower limit voltage
V
2TOFF/L
f
OSC
0.1
0.05
0.2
V
Output oscillation frequency
C
ON
=
2 200 pF, R
OFF
=
1.5 k
C
OFF
=
1 000 pF
I
FB
=
1 mA
V
CC
=
10 V, I
OUT
=
10 mA
I
OUT
=
10 mA
I
OUT
=
100 mA
I
OUT
=
10 mA
I
OUT
=
100 mA
V
CC
=
12V
V
CC
=
18 V
TON terminal
=
GND
FB terminal
=
open
V
CC
=
34 V
TON terminal
=
GND
FB terminal
=
open
55
65
75
kHz
Output current feedback current gain
G
IFB
5.05
6.8
8.55
Pre-start low-level output voltage
V
6STB/L
1
1.25
V
Low-level output voltage 1
V
6L(1)
0.9
2
V
Low-level output voltage 2
V
6L(2)
1.1
2.2
V
High-level output voltage 1
V
6H(1)
15.7
16.5
V
High-level output voltage 2
V
6H(2)
15.5
16.3
V
Pre-start circuit current
I
7STB
I
7OPR(1)
55
95
135
μ
A
Circuit current 1
8.55
11.5
14.3
mA
Circuit current 2
I
7OPR(2)
9.6
12.5
15.4
mA
TDL flowing-out current
I
1TDL
V
TDL
=
0.5 V
5
0
μ
A
Pin No.
Equivalent circuit
Description
I/O
1
TDL:
Transformer reset detection terminal.
When the transformer reset is detected and low
is inputted into the terminal, the output of the IC
(V
OUT
) becomes high. However, low-level sig-
nal under the minimum off-period determined
by the T
OFF
is ignored.
I
2
TOFF:
Terminal for connecting the resistor and capaci-
tor for determining the minimum off-period (low)
of the IC output (V
OUT
).
An equation for approximate calculation of the
minimum off-period (T
OFF
) is as follows:
T
OFF
=
2.2
×
C
×
R
C: External capacitance
R: External resistance
I
Terminal Equivalent Circuits
V
REF
High-
side
clamp
Low-
side
clamp
1
V
CC
Comp.
0.1 V
2
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