Table of Contents
Advertisement
NXP Semiconductors
2.2.2.2 UJA1169A without an external PNP
2.2.2.3 UJA1169Ax-EVB with multiple external PNPs
UM11758
User manual
As already discussed, the UJA1169Ax-EVB can operate using only the V1 regulator in
applications where thermal considerations are not critical. For this option, resistors R4
and R10 must be removed, as illustrated in
UJA1169A
Figure 5. UJA1169Ax-EVB PCB configured to operate without a PNP.
Figure 6. UJA1169Ax-EVB PCB configured to operate without a PNP.
If thermal dissipation is so high that it needs to be distributed over a number of
components, multiple PNPs can be connected in parallel. A single onboard PNP is
included. Additional PNPs can be connected via header J9, as illustrated in
An emitter resistor is needed for each PNP to balance the current between the devices
(e.g. 10 Ω). Make sure the resistor selected can handle the expected power dissipation.
All information provided in this document is subject to legal disclaimers.
J3
VEXCTRL (p15)
VEXCC (p6)
V1 (p5)
V1
GND
(p1, 4, 16, 19)
GND
Rev. 1 — 19 April 2022
UJA1169A evaluation boards
Figure 5
and
Figure
6.
BAT
R4
0 Ω
C9
R15
10 nF
R10
100 k
0 Ω
PNP
R13
1.6 Ω
J7
C8
6.8 F
R9
1 k
D5
LED
UM11758
BAT
J9
GND
PNP_B
PNP_C
VDD
J5
GND
aaa-045490
Figure
7.
© NXP B.V. 2022. All rights reserved.
7 / 39
Advertisement
Table of Contents
