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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)： | 3/22頁 |
| 文件大小： | 179K |
| 代理商： | AN8038S |
Voltage Regulators
AN8038, AN8038S
3
I
Pin Descriptions
Pin No. Symbol
Description
1
TR
Transformer reset. When a transformer reset is detected, i.e., a low level is input to this pin, the IC
output goes high.
However, the transformer reset signal is ignored during the minimum off-period determined by
the CF pin. The maximum on-period is also corrected according to the current flowing out of this
pin.
2
RSTB
Adjusts the light-load detection level that determines the when the IC switches from RCC to
discontinuous operation. When the voltage (V
FB
) which is I-V conversion of current feedback
signal from IFB pin goes up higher than this pin, minimum off-period current at CF pin decreases,
and operating frequency decreases.
The detection level can be adjusted arbitrarily using an external pull-down resistor.
3
CF
Connection for the capacitor that determines the on and off periods for the IC output (Out).
4
IFB
Input for the current feedback signal from the power supply output photocoupler
5
CLM
Input of the pulse-by-pulse overcurrent protection circuit. Normally, it will be necessary to add
an external filter for this input.
6
GND
Ground
7
V
OUT
V
CC
Output to drive a power MOSFET directly
8
Power supply. This pin watches V
CC
, and has operating threshold voltages for the start, stop,
OVP, and OVP reset levels.
Parameter
Symbol
Range
Unit
Supply voltage
V
CC
From the stop voltage to the OVP operating voltage
V
I
Recommended Operating Range
Note) *1: When mounted on a printed circuit board: 477 mW
*2: When mounted on a printed circuit board: 191 mW
Parameter
Symbol
Rating
Unit
Supply voltage
V
CC
28
V
Peak output current
I
OP
1,
+
2
A
Power dissipation
AN8038
P
D
(T
a
=
25
°
C)
P
D
(T
a
=
85
°
C)
P
D
(T
a
=
25
°
C)
P
D
(T
a
=
85
°
C)
500
mW
(Independent IC
260
without a heat sink) AN8038S
306
*1
122
*2
Operating temperature
T
opr
30 to
+
85
55 to
+
150
°
C
°
C
Storage temperature
T
stg
I
Absolute Maximum Ratings
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