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NXP Semiconductors
UM11379
UJA116xA evaluation boards
2.2 Power supply connections
2.2.1 Battery connections (all UJA116xA-EVB boards)
An external power supply must be connected to either power jack J6 or 2-pin header J2,
.
UJA116xA
UJA116xA-EVB
BAT (pin 10)
J2-01 or J6-01: connect to battery supply
J5-01 and J5-15: pin VIN on the UJA116xA-EVB board is connected
to the battery supply by default via jumper J8; remove jumper J8 to
disconnect VIN on J5 from the battery supply
Table 3. BAT/VIN connections
Both supply circuits are routed via polarity protection Schottky diode D1 in order to block
reverse currents. Decoupling capacitors C1 and C2 are provided to stabilize the input
voltage and remove noise on the battery connection.
Green LED D2 lights up once the 12 V power supply has been connected.
By default, the UJA116xA evaluation board battery supply is routed to the MCU board
via pin VIN on the Arduino connector, allowing the supply to the entire module to be
managed via the UJA116xA board. This feature can be disabled by removing jumper J8,
disconnecting the battery supply from pin VIN.
J2
J5
J8
aaa-040316
UJA116xA
BAT (p10)
GND(p2)
12 V
GND
J6
C2
0.1 µF
C1
100 µF
R1
1 kΩ
D2
LED
D1
Schottky
diode
VIN
Figure 2. 12 V power supply connection options (relevant for the entire UJA116xA_EVB
family)
UM11379
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© NXP B.V. 2021. All rights reserved.
User manual
Rev. 1 — 23 April 2021
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