APA06 Non-Isolated Power SIPs
3V-5.5V Input, 1.2V-3.3V Output, 9-20W Output
Output Characteristics
Input Characteristics
Remote Sensing
The APA06 power module has no internal
fuse. An external fuse must always be
employed! To meet international safety
requirements, an input line fuse should be
used. Input wires and copper coil must be
capable of conducting a current of 1.5 times the
value of the fuse. If one of the input lines is con-
nected to chassis ground, then the fuse must
be placed in the other input line.
When the load can not be placed close to con-
verter output pin, voltage drop will occur in dis-
tribution. This voltage drop can be compensat-
ed using sense lead. As shown in figure 3, con-
necting sense pin close to the load, when the
load changes, the module will automatically
adjust the real output to maintain the constant
voltage on the load.
If not using the remote sense pin, leave it open.
A fuse with ratings of 15A is recommended for
2.5V and 3.3V output, and 10A for APA06 other
products.
Rline
+V
out
Load
Sense
-V
CNT Function
The APA06 provides CNT function allowing the
user to turn the output on and off using an
external circuit such as figure 1 and figure 2.
The control voltage-threshold is: 1.8V. For neg-
ative control(negative logic N or positive logic P
are optional), applying a voltage less than 1.8V
to the CNT pin will enable the output, while
applying a voltage greater than 2.4V will disable
it. If not using CNT feature, leave the CNT
pin open. The maximum voltage that can be
applied to the control pin is 12 volts.
out
Fig.3 Sense Connection
Output Trimming
Output can be externally trimmed by using
either method shown in figure 4.
Users can increase or decrease the output volt-
age set point of a module by connecting an
external resistor between the TRIM pin and
either the +Vout or GND pins. The trim resistor
should be positioned close to the module. If not
using the trim feature, leave the TRIM pin
open.
VI
Vo
CNT
Trimming up or down by more than 16% of
the nominal output may cause the converter
to work improperly.
GND
Fig.1 Transistor CNT Control
The trim formula for different output voltage are
shown in figure 4 next page.
VI
Vo
CNT
GND
Fig.2 Simple CNT Control
-10-
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