Getting Started with the KITVR249SKTEVM Evaluation Board
このドキュメントの内容
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Out of the Box
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Get Hardware
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Plug It In
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お客様の KITVR249SKTEVM
1. Out of the Box
The KITVR249SKTEVM kit allows you to evaluate, design, implement and validate the programming board using the VR249 fail-safe power management integrated circuit (PMIC) with multiple switched-mode power supplies (SMPSs) and low-dropout regulators (LDOs). The programming board contains a socket for the LQFP48 package to allow functional testing and programming of different samples.
This page will guide you through how to use the kit to evaluate the KITVR249SKTEVM programming board including connecting the hardware, installing the software/tools and configuring your environment.
1.1 Kit Contents and Packing List
The kit's contents include:
- KITVR249SKTEVM
- Assembled and tested evaluation board and preprogrammed FRDM-KL25Z microcontroller board in an anti-static 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 board
1.2 Additional Hardware
In addition to the kit 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 that your PC is equipped with the following:
- USB connection
- Windows 7, Windows 10 or Windows 11 operating systems
1.4 Software
Before working with the evaluation board, you will need to install software, specifically the NXP graphical user interface (GUI). This software can be found on the KITVR249SKTEVM page.
2. Get Hardware
2.1 Board Features
The KITVR249SKTEVM evaluation board includes the following:
- Battery voltage (VBAT) power supply connectors (jack and Phoenix)
- Low-profile quad flat package, 48-pin (LQFP48)burn-in open-top socket
- 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
- Advance system monitoring via analog multiplexer (AMUX) or external ADC
- Analog variable resistor to test an external voltage monitor (VMON)
2.2 Board Description
The KITVR249SKTEVM kit provides flexibility to work with all the features of the device and make measurements on the main part of the application. The FRDM-KL25Zconnected to the board—combined with the VR249 NXP GUI software—allows full configuration and control of the VR249 PMIC. The LQFP48 socket on the board allows for testing or programming of different samples.
A VR249 PMIC sample must be inserted into the socket to enable OTP programming, emulation or evaluation. Because board performance is limited for full device evaluation, confirm whether your intended use requires a separate evaluation board or setup.
2.3 Board Components
This section covers the components of the board. Figure 1 identifies important components on the board.
The following numbered items correspond to the diagram shown above.
- VBAT Phoenix connector
- VBAT three position switch
- VBAT Jack connector
- VDDIO selection
- Regulator outputs
- WAKE1 and WAKE2 input switches
- LQFP48 socket
- KL25Z Freedom headers (Bottom)
- DEBUG pin voltage source selection (switch or MCU)
- DEBUG pin voltage level switches
- VDDIO USB voltage level selection
- VMONEXT variable resistor
- Signal connector
- Program connector
- Regulators output LED indicators
- Program burning voltage LED indicator
- Safety outputs LED indicators
- Debug mode LED indicator
3. Plug It In
3.1 Plug It In
The KITVR249SKTEVM board can be powered through the Phoenix connector
J20 or the jack connector J21. Use the three-position switch SW1
to select the active supply connector. The nominal VBAT voltage is 24 V, with
support up to 40 V. Figure 2 below shows related schematic. Nominal VBAT
voltage is 24 V and can support up to 40 V.
| Schematic label | Signal name | Description |
|---|---|---|
J20-1 |
VBAT | Battery voltage supply input |
J20-2 |
GND | Ground |
| 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 |
The kit is provided with the default jumper configuration shown below in Figure 3. This configuration is suitable for a boost in front-end topology.
| 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 |
Design Resources
Board Information
Additional References
For additional resources, go to the KITVR249SKTEVM page or VR249X product pages.