an8027 Panasonic Corporation of North America, an8027 Datasheet - Page 11
an8027
Manufacturer Part Number
an8027
Description
Ac-dc Switching Power Supply Control Ic With Standby Mode
Manufacturer
Panasonic Corporation of North America
Datasheet
1.AN8027.pdf
(28 pages)
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Voltage Regulators
[1] Operation descriptions (continued)
Application Notes (continued)
(A)Voltage on bias winding
(B)TR pin voltage
(D)Out pin voltage
(C)CF pin voltage
Current on
bias winding
2) Standby (Intermittent) mode (for light loads)
Control waveform timing chart (continued)
<Circuit diagram>
V
FB
CLM
voltage
2.4 V
AN8027, AN8037
0 V
0 V
4 V
0 V
0 V
0 A
Off
Off
TR
CF
(B)
(C)
V
Out
(E)Current
on primary
winding
CC
(D)
On
On
Off
Off
T
only after CF pin
voltage reaches 4 V.
ON
(F)Current
on secondary
winding
(G)
is acceptable
(A)
(E)
T
OFF(min)
T
(OFF)
On
(F)
Off
Off
AN8027, AN8037
T
during T
ON
is unacceptable
OFF(min)
period.
11
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