E a s y P I C v 8 f o r P I C 2 4 / d s P I C 3 3
M a n u a l
P A G E 11
P O W E R S U P P L Y
N O T E
When connecting an external power supply over a barrel connector, make sure
that the polarity of the barrel connector is matched with its counterpart on
the development board, according to the image printed next to the male DC
connector.
Battery power supply
When powered by a single-cell Li-Po/Li-Ion battery, the development board offers
an option to be operated remotely. Combined with the fact that the board can be
remotely programmed and debugged over the WiFi network, the EasyPIC v8 for PIC24/
dsPIC33 development board allows complete autonomy, allowing it to be used in
some very specific situations: hazardous environments, agricultural applications, etc.
The development board uses a 2.5mm pitch XH battery connector. It allows a range
of Li-Po and Li-Ion batteries to be connected. The development board offers battery
charging functionality from both the USB connector and the external power supply.
The battery charging circuitry of the PSU module manages the battery charging
process, ensuring optimal charging conditions and longer battery life. The charging
process is indicated by a CHARGER LED indicator.
The battery charging current can be configured by using the CODEGRIP Suite, which
offers a choice between 100mA and 500mA when the USB power supply is used,
or between 100mA and 200mA when the external 12V power supply is used. In the
case when the development board is powered OFF, the charging current will be set to
500mA by default (200mA with the external power supply).
If both the external 12V power supply and the USB cable are connected to the
development board, the battery will be charged from the external 12V power supply,
thus minimizing the USB power consumption.
Maximum power ratings at a fully charged battery, along with the allowed input
voltage range when the battery power supply is used, are given in the following table:
N O T E
It is advised to disable the battery charging circuitry if there is no battery
connected to the EasyPIC v8 for PIC24/dsPIC33 development board. This can
be done using CODEGRIP Suite.
Battery Power Supply
Input Voltage [V]
Output Voltage [V]
3.3
5
3.3 & 5
1.6
1.2
0.7 & 0.7
5.28
6
5.81
Max Current [A]
Max Power [W]
MIN
3.5
4.2
MAX
Figure 4: Battery Power Supply table
Using USB hubs, long USB cables, and low-quality USB cables, may cause a
significant USB voltage drop, which can obstruct the battery charging process.
