User Manual

NCV78XXXGEVK
www.onsemi.com
3
Getting Started
The evaluation board can be supplied through a standard
5.5 x 2.5 mm power jack DC connector, but preferred way
is to connect current limited laboratory power supply
through standard 4 mm bananas.
Battery voltage should be connected first, followed by
connection of USB mini cable.
Individual battery inputs can be shorted together on board
by means of zero ohm resistors R101, R106, R111 (and
R126, R116, R121 for full size board).
Figure 2. Battery Input Connection
At each individual battery input the reverse battery
protection circuitry is placed.
Figure 3. Reverse Battery Protection
After reverse battery protection, at each battery input,
there is a diode bringing the voltage to the section with linear
regulators creating 12 V, 5 V and 3.3 V supply branches. In
case of need (e.g. efficiency measurements) some of diodes
D204, D205, D206 (D202, D204, D206, D208, D210, D212
for full size board) can be unsoldered and the connection
interrupted by this way. Please note that connecting higher
voltage (> 40 V) on battery inputs can cause excessive power
loss on linear regulators.
Figure 4. Connection from Battery Inputs to
Regulators