AN8031 Datasheet, PDF (1/21 Pages) Panasonic Semiconductor – Active filter control IC

Voltage Regulators
AN8031
Active filter control IC
s Overview
In supplying electric power from commercial power
2.4±0.25
6.0±0.3
3.3±0.25
Unit: mm
supply to various electrical equipment, there is a possi-
bility that the harmonic distortion generated in the power
9
line may give obstruction to the power facilities or other
8
electrical equipment. The use of active filter is one of the
7
methods to solve the harmonic distortion problems.
6
The AN8031 is a monolithic IC which incorporates
5
the control and protection functions into one package so
4
that the active filter can be constructed easily. It is most
3
suitable for the measures against the harmonic distortion
2
1
problems such as lighting equipment.
0.3
+0.1
–0.05
s Features
• Self-excited peak current mode is adapted.
3.0±0.3
• Built-in protection circuit for preventing the overvolt-
SIP009-P-0000C
age generated under a small load
• Easy constant setting with enlarged dynamic range of multiplier and error amplifier.
• Using totem pole output circuit which allows the power MOSFET to be directly driven.
• Built-in low voltage protection circuit which ensures the on-resistance during the power MOSFET operation.
• Timer circuit is built in for realizing automatic start.
s Applications
• Lighting equipment and switching power supply equipment
s Block Diagram
Under voltage Over voltage
clamper
clamper
1 _SVCC
One
shot
U.V.L.O. comp.
6 _VB
2.5 V
V_REF
10 V/8 V
Timer
Drive
9 _PVCC
8 _VOUT
Current
comp.
MPI ³
Multiplier
2.5 V
OVP comp.
2.6 V
2 _CS
Error amp.
5 _EI
2.5 V
1