an8032 Panasonic Corporation of North America, an8032 Datasheet - Page 10

• Manufacturer Part Number: an8032
• Description: Active Filter Control Ic
• Manufacturer: Panasonic Corporation of North America

AN8032
10
[2] Operation descriptions (continued)
1. Normal control (continued)
Application Notes (continued)
AN8032
3) Description of each function (continued)
V
voltage clamp
current
V
voltage clamp
current
Lower limit
voltage clamp
B
B
(1) V
<Setting the V
lower limit
upper limit
Regulation by clamper in/out-current value
limit voltage clamper is 5 mA and the allow-
able input current of the lower limit voltage
clamper is 5 mA. Either one of these allow-
able values is exceeded, the voltage clamp op-
eration of the V
Therefore, R
are not exceeded.
Consumption current and delay
threshold could be exceeded. When the R
is too small, the consumption current becomes
too large.
erly, the input voltage range and the dispersion
of components should be taken into consider-
ation and it should be confirmed that a stable
operation can be ensured under start/overload
conditions or under a small load condition.
B
The allowable output current of the upper
When the R
In order to determine the R
V
(continued)
Upper limit
voltage clamp
CC
B
B
terminal constant>
should be set so that these values
GND
V
B
B
B
terminal is not guaranteed.
value is too large, the V
V
Figure 5. Explanation of V
B
B
value prop-
B
SDB
I
I
DS
value
D
B
R
T
R
is small and undershoot tends to be generated easily.
B
OFF
B
too large
too small
is extended by the delay amount because of low speed.
B
Clamp upper
limit voltage
operation
I
DS
:
AN8032
Consumption current becomes small, however,
:
V
Speed is high, however, consumption current
B
Clamp upper
limit voltage
V
B
Reset operation
of inductor
Voltage Regulators
I
D
5 mA or less
threshold value
R
B
V
B
Time
Time