Getting Started with the KITVR249AEEVM Evaluation Board

最終更新日時： Aug 11, 2026 new サポート KITVR249AEEVM

このドキュメントの内容

  • 1

    Out of the Box

  • 2

    Get Hardware

  • 3

    Plug It In

お客様の KITVR249AEEVM

このドキュメントの内容

1. Out of the Box

The KITVR249AEEVM kit allows you to evaluate, design, implement and validate the PF9455 power management integrated circuit (PMIC) for high-performance applications.

This guide will walk you through the contents of the kit, the components of the board, the software.

1.1 Kit Contents and Packing List

The KITVR249AEEVM contents include:

  • Assembled and tested KITVR249AEEVM and preprogrammed FRDM-KL25Z microcontroller (MCU) board in an antistatic bag
  • 3.0 ft USB-STD A to USB-C-mini cable
  • Two two-position straight terminal block plug connectors, 3.81 mm
  • Three three-position straight terminal block plug connectors, 3.81 mm
  • Jumpers mounted on the board

1.2 Additional Hardware

In addition to the kit's contents, the following hardware is necessary or beneficial when working with this board.

  • Power supply with a range of 8.0 V to 40 V and a current limit set initially to 1.0 A

1.3 Minimum System Requirements

You will need a Windows PC workstation to evaluate the board. For best results, please ensure your PC is equipped with the following:

  • USB-enabled connection with Windows 7, Windows 10 or Windows 11 operating system

1.4 Software

Before working with the evaluation board, you will need to install software, specifically the NXP graphical user interface (GUI) package. This software can be found on the KITVR249AEEVM page.

次へGet Hardware

2. Get Hardware

The KITVR249AEEVM evaluation board includes the following:

2.1 Board Features

  • Battery voltage (VBAT) power supply connectors (jack and Phoenix)
  • Pre-regulator voltage (VPRE) output 3.7 V to 6.35 V
  • Boost voltage (VBOOST) in independent mode or in front-end topology to support battery cranking profiles
  • Core voltage (VCORE) output 0.8 V to 3.35 V, up to 1.65 A
  • Low-dropout regulator 1 (LDO1) and low-dropout regulator 2 (LDO2), from 3.3 V or 5.0 V, up to 400 mA
  • Tracking voltage regulator 1 (VTRK1) and tracking voltage regulator 2 (VTRK2) from 3.3 V or 5.0 V, up to 150 mA
  • Voltage reference (VREF) accuracy regulator for external analog-to-digital converter (ADC) reference
  • Fail-safe output 0 (FS0B) and fail-safe output 1 (FS1B) external safety pins
  • USB-to-serial peripheral interface (SPI) protocol for easy connection to software GUI
  • LEDs that indicate signal or regulator status
  • Manual or automated one-time programmable (OTP) fuse programming
  • Advanced system monitoring via analog multiplexer (AMUX) or external ADC
  • Analog variable resistor to test external voltage monitor (VMON)

2.2 Board Description

The VR249 family can be evaluated using the KITVR249AEEVM board because it is populated with a superset device. The VR249X device soldered on the board can be fused one time, or users can test multiple configurations as needed in emulation mode.

The board is designed to support up to 2.0 A total on VPRE. The layout uses a six-layer printed circuit board (PCB) layout. Set the initial current limitation to 1 A.

2.3 Board Components

This section covers the components of the KITVR249AEEVM board. Refer to Figure 1 to identify the components of the board.

Figure 1. Evaluation Board Featured Component Locations

Figure 1. Evaluation Board Featured Component Locations

This numbered list of KITVR249AEEVM board components corresponds the numbered callouts in Figure 1 above.

  1. VBAT Phoenix connector
  2. VBAT 3-position switch position switch
  3. VBAT jack connector
  4. Input/output supply voltage (VDDIO) selection
  5. Regulator outputs
  6. WAKE1 and WAKE2 input switches
  7. VR249 PMIC
  8. KL25Z Freedom headers (HDRs), bottom side
  9. LED supply voltage (VLED) source selection: DBG_OTP or VPRE
  10. DEBUG pin voltage-level switches
  11. VDDIO USB voltage-level selection
  12. External voltage-monitoring input (VMONEXT) variable resistor
  13. Signal connector
  14. Program connector
  15. Regulators output LED indicators
  16. Program-burning voltage LED indicator
  17. Safety output LED indicators
  18. Debug mode LED indicator

前へOut of the Box
次へPlug It In

3. Plug It In

3.1 Plug It In

Power to the board can be supplied in one of two ways: either by a Phoenix connector (J20) or a jack connector (J21). The select the input connector is done using a three-position switch (SW1). Refer to the tables below to familiarize yourself with the VBAT Phoenix connector and the VBAT three-position switch setup.

Table 1. VBAT Phoenix Connector (J20).

Schematic Label Signal Name Description
J20-1 VBAT Battery voltage supply input
J20-2 GND Ground
Figure 2. VBAT Connectors Schematic

Figure 2. VBAT Connectors Schematic.

Table 2. VBAT Three-Position Switch (SW1).

Schematic Label Signal Name Description
SW1 pin 2-3 VBAT Phoenix Board supplied by Phoenix connector
SW1 pin 2 (middle position) VBAT Board not supplied
SW1 pin 2-1 VBAT Jack Board supplied by Jack connector

Figure 2 below shows the related schematic. The nominal VBAT voltage is 24 V and supports up to 40 V.

The kit is provided with the default jumper configuration shown in Figure 3 and Table 3. This configuration is suitable for front-end boost topology.

Figure 3. Default Jumper Configuration on KITVR249SKEEVM

Figure 3. Default Jumper Configuration on KITVR249SKEEVM

Refer to Figure 3 above alongside Table 3 below to become familiar with the jumpers on the KITVR249SKEEVM board.

Table 3. Default Jumper Configuration on KITVR249SKEEVM.

Schematic Label Signal Name Default Setting
J51 VBST_BE_IN OFF
J49 VBST_G 3-2
J50 VSUP_PWR ON
J53 VBST_ISH 3-2
J48 VSUP 3-2
J55 VBST_ISL 3-2
J52 VBAT_D 3-2
J54 VBST_FB 3-2
J12 VDDIO VDDIO_USB
J28 VLED 3-2
J22 VDDIO_USB 3-2
SW2 WAKE1 OFF
SW3 WAKE2 OFF
SW6 DBG = 5 V OFF
SW7 DBG = 8 V OFF

前へGet Hardware
次へDesign Resources

Design Resources

Board Information

Additional References

For additional resources, visit the KITVR249AEEVM page, or refer to the KITVR249SKTEVM or VR249X pages.

前へPlug It In