an8038 Panasonic Corporation of North America, an8038 Datasheet - Page 11

• Manufacturer Part Number: an8038
• Description: Ac-dc Switching Power Supply Control Ic With Rcc Local Resonance Circuit For Improved Conformance With Energy Conservation Laws
• Manufacturer: Panasonic Corporation of North America

Voltage Regulators
[2] Operation descriptions (continued)
2. Oscillator circuit (continued)
Application Notes (continued)
Control switching voltage V
Output monitoring voltage V
increases when E
t
ON
PC
Out pin voltage
is reduced since I
IFB
TR
V
20 k
Current mirror
CC
Figure 2. On-period block diagram and control waveforms
IN
5 : 1
is large.
4.2 V
1.5 V
RSTB
FB
0 V
0 V
TR
CF pin voltage
V
280 A
FB
typ.
Current mirror
I
TR
I
TR
1 : 1
I
R
ON
C
I
I
TR1
CF
TR
ON
On-period
Out
GND
V
CC
Input voltage correction
E
IN
R
On-period: shorter
: larger
TR2
E
E
IN
IN
Off-period
AN8038, AN8038S
N
N
P
B
11