NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Power supply Power supply jumper Jumper pins for ammeter connection
VDD_SWITCH JP4 Pins 1 and 2
VDD_DCDC JP7 Pins 1 and 2
VDD_IO_ABC JP8 Pins 1 and 2
VDD_ANA JP9 Pins 1 and 2
VDD_LDO_CORE JP12 Pins 1 and 2
VDD_RF JP14 Pins 1 and 2
VBOARD JP41 Pins 1 and 2
Table 9. Current measurement using an ammeter
2.1.2 Power modes
The KW45B41Z-EVK board supports the following power modes:
• DC-DC Buck mode: This is the default power mode of the board. In this mode, the DC-DC converter of the
target MCU is enabled.
• DC-DC Bypass mode: In this mode, the target MCU DC-DC converter is disabled
• PMIC mode
• Smart Power Switch mode
Changing power mode of the board from default mode (DC-DC Buck mode) to another power mode (DC-DC
Bypass mode, PMIC mode, or Smart Power Switch mode) involves reconfiguring some of the board jumpers.
Changing power mode also involves cutting traces at the bottom side of the PCB.
Table 10 explains how to switch the KW45B41Z-EVK board from one power mode to another power mode by
changing jumper settings.
Current power mode Desired power mode Required jumper setting changes
DC-DC Buck mode DC-DC Bypass mode Change jumper JP10 setting from 5-6 shorted to
3-4 shorted
DC-DC Bypass mode DC-DC Buck mode Change jumper JP10 setting from 3-4 shorted to
5-6 shorted
DC-DC Buck mode PMIC mode
[1]
• Change jumper JP10 setting from 5-6 shorted to
1-2 shorted
• Change jumper JP5 setting from 3-4 shorted to
5-6 shorted
• Short jumper JP15
• Short jumper JP11 (if populated)
PMIC mode DC-DC Buck mode • Change jumper JP10 setting from 1-2 shorted to
5-6 shorted
• Change jumper JP5 setting from 5-6 shorted to
3-4 shorted
• Open jumper JP15
• Open jumper JP11 (if populated)
DC-DC Bypass mode PMIC mode
[1]
• Change jumper JP10 setting from 3-4 shorted to
1-2 shorted
• Change jumper JP5 setting from 3-4 shorted to
5-6 shorted
• Short jumper JP15
Table 10. Power mode switching
KW45B41Z-EVKUM All information provided in this document is subject to legal disclaimers. © 2023 NXP B.V. All rights reserved.
User manual Rev. 2 — 13 February 2023
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