NXP Semiconductors KW45B41Z-EVK - DC-DC Inductor

NXP Semiconductors
KW45B41Z-EVKUM
KW45B41Z-EVK Board User Manual
Current power mode Desired power mode Required jumper setting changes
• Short jumper JP11 (if populated)
PMIC mode DC-DC Bypass mode • Change jumper JP10 setting from 1-2 shorted to
3-4 shorted
• Change jumper JP5 setting from 5-6 shorted to
3-4 shorted
• Open jumper JP15
• Open jumper JP11 (if populated)
DC-DC Buck mode or DC-DC
Bypass mode
Smart Power Switch mode Change jumper JP6 setting from 1-2 shorted to 2-3
shorted
Smart Power Switch mode DC-DC Buck mode • Change jumper JP6 setting from 2-3 shorted to
1-2 shorted
• Change jumper JP10 setting to 5-6 shorted
Smart Power Switch mode DC-DC Bypass mode • Change jumper JP6 setting from 2-3 shorted to
1-2 shorted
• Change jumper JP10 setting to 3-4 shorted
Table 10. Power mode switching...continued
[1] To enable Full PMIC mode, additionally disable Core LDO and DC-DC of the target MCU by configuring the CNTRL register of System Power Controller
(SPC) in software as follows:
1. Set CNTRL[CORELDO_EN] = 0
2. Set CNTRL[DCDC_EN] = 0
2.1.3 DC-DC inductor
The KW45B41Z-EVK board uses a 1 μH DC-DC inductor L1 (TDK MLZ2012A1R0WTD25). The inductor is
enabled when the board is configured in DC-DC Buck mode. Figure 10 shows the DC-DC inductor circuit
diagram of the KW45B41Z-EVK board.
MLZ2012A1R0WTD25
L1 AUTO PART
(t o DCDC_LX in d uc t or)
DCDC_LX
GND GND
GND
C6
22uF
1210
10V
L1
1uH
1
2
C8
47pF
C7
0.01uf
R1
22
Figure 10. DC-DC inductor circuit diagram
Other recommended inductors are LQM18PH1R0MFRL from Murata and 78438336010 from Würth Elektronik.
Figure 11 shows other possible inductor options.
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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