AN8032
s
Application Notes
[1] P
D
T
a
curve of SIP009-P-0000C
1 000
900
874
800
Independent IC without a heat sink
R
th( j−a)
=
143°C/W
P
D
=
874 mW (25°C)
Voltage Regulators
P
D
T
a
Power dissipation P
D
(mW)
700
600
500
400
300
200
100
0
0
25
50
75 85
100
125
150
Ambient temperature T
a
(°C)
[2] Operation descriptions
1. Normal control
1) Application outline
As shown in figure 1, the standard application of the AN8032 is a booster chopper circuit, which inputs
the voltage rectified from the commercial supply of 100 V/200 V (A in figure 1) and outputs the DC voltage
of 400 V (B in figure 1).
It controls so that the input current proportional to the input voltage (C, D in figure 1) could be flown.
The reason for selecting the output voltage of 400 V is that the withstanding voltage of components and
the operation limitation of booster chopper (input voltage
<
output voltage) under the worldwide input voltage
are taken into consideration.
Booster circuit so that set at:
E
IN(max)
< E
OUT
D. Input current
(I
IN
)
0A
A. Voltage after rectification
(E
IN
)
E
IN(max)
B. Output voltage
(E
OUT
)
400 VDC
0V
Active filter
0V
Input current proportional
to input voltage flows.
Input
I
IN
E
IN
SBD
AN8032
E
OUT
Output
C. Input voltage
(V
IN
)
Commercial
power supply
(AC)
0V
Load
V
IN
Diode bridge
Booster chopper circuit
Figure 1. Application outline description
6
PANASONIC [ PANASONIC SEMICONDUCTOR ]
