Murata UltraCP MYC0409-NA's EVM User Guide
Document Category: User guide
Product: Ultra-thin High Efficiency 72W DCDC converter module
ABSTRACT
This user guide provides essential information for the correct usage of the test board and an explanation of the test points and jumpers. The test board features the MYC0409-NA module configured for Divide by Four operation, operating across the full input voltage range of the MYC0409-NA. It includes minimum input and output capacitors on the board.
Description
Two Evaluation Modules (EVMs) are available, featuring single or four parallel MYC0409-NA charge pump modules. These are configured for operation with an input voltage range of 20V to 60V. The output voltage is a fixed divide-by-4 conversion ratio of the input voltage, capable of supplying the full output current rating of the device. Input and output capacitors are integrated to support the entire input and output voltage range. Monitoring test points are provided for measuring voltage, efficiency, power dissipation, and load regulation. Control jumpers and component footprints are included to utilize the ENABLE, PGOOD, and CLK features. Both EVMs utilize a recommended PCB layout designed to minimize output ripple and noise. Detailed application information for the MYC0409-NA is available in its datasheet.
Figure 1. Evaluation Board: Displays two evaluation boards: (a) MYC0409-NA-EVM and (b) MYC0409-NA-PARA-EVM.
Performance Summary
Table 1 details the performance summary of the evaluation boards.
| PARAMETER | SYMBOL | CONDITIONS | MIN | TYPICAL | MAX | UNITS |
|---|---|---|---|---|---|---|
| INPUT SUPPLY | ||||||
| Input voltage range | VIN | 20 | 48 | 60 | V | |
| OUTPUT | ||||||
| Efficiency Full Load | MYC0409-NA-EVM (VIN = 48V, IOUT = 6A) | - | 95.0 | - | % | |
| MYC0409-NA-PARA-EVM (VIN = 48V, IOUT = 20A) | - | 95.0 | - | % | ||
| Switching Frequency | FSW | - | 270 | - | kHz | |
| Output Current (Continuous) | IOUT | MYC0409-NA-EVM (Inside recommended OP range) | 0 | 6 | - | A |
| MYC0409-NA-PARA-EVM (Inside recommended OP range) | 0 | 20 | - | A | ||
| VOUT Voltage | VOUT | ILOAD=No load, DC | - | VIN/4 | - | V |
Quick Start Guide of MYC0409-NA-EVM
Figure 2 highlights the user interface items on the EVM. VIN Power terminals are for connecting the host input supply, and VOUT Power terminals are for connecting to the load. Sense(+/-) test points, located near the power terminals, are for voltage monitoring. These sense points should not be used for input supply or output load connections.
Control jumpers are located on the board to test features like ENABLE, PGOOD, and SYNC. The PGOOD jumper (JPGOOD) is used for the PGOOD signal, the SYNCSEL jumper (JSYNC_SEL) for synchronization selection, and the EN jumper (JEN) for ON/OFF control. Always remove input power before changing jumper settings.
Figure 2. MYC0409-NA-EVM User Interface (Top view): Illustrates the key connection points and jumpers on the MYC0409-NA-EVM board, including VIN power and sense terminals, VOUT power and sense terminals, Enable Selector (JEN), PGOOD Selector (JPGOOD), SYNC Selector (JSYNC), and SYNCSEL Selector (JSYNC_SEL).
Terminal Functions and Jumper Settings (MYC0409-NA-EVM)
Table 2 lists the terminal functions and recommended jumper settings for the MYC0409-NA-EVM.
| FUNCTION/TERMINAL | JUMPER (RECOMMENDATION) | DESCRIPTION |
|---|---|---|
| VIN power (+/-) | Power input pin and Input Ground pin. | |
| VOUT power (+/-) | Power output pin and output Ground pin. | |
| VIN sense (+/-) | Sensing pin for measuring the input voltage. | |
| VOUT sense (+/-) | Sensing pin for measuring the output voltage. | |
| VDD power (+) | Power input pin (3.3V - 5V). It pulls PGOOD up to VDD. | |
| EN (JEN) | Short (1 and 2) | Enable pin. Open: Controls EN input. Short (1 and 2): Pulls EN up to VIN. |
| PGOOD (JPGOOD) | Short | Power GOOD pin. Pulls PGOOD up to VDD. Do not open this pin. |
| SYNCSEL (JSYNC_SEL) | Open | SYNCSEL pin. Open: SYNC disabled. Short: SYNC = Clock output. |
| SYNC (JSYNC) | Open | CLOCK IN / OUT pin. Do not short this pin. |
| J1 | Open | Unused jumper pin. Do not short this pin. |
| J2, J3 | Short | Unused jumper pins. Do not open these pins. |
Power Input and Output Descriptions: VIN power terminals connect to the input supply, and VOUT power terminals connect to the load. The VDD power terminal is used to pull PGOOD up. Caution: Sense terminals are for voltage monitoring only and are not designed for high current connections; doing so may damage PCB traces.
Test Point Descriptions: Sense(+) and Sense(-) test points for VIN and VOUT are for voltage monitoring with voltmeters.
Jumper Descriptions: The SYNCSEL jumper (JSYNC_SEL) controls SYNC terminal functionality. Ensure correct jumper placement before applying power. The EN jumper (JEN) pulls up Vin, and the PGOOD jumper (JPGOOD) pulls up VDD. Always remove input power before changing jumpers. J1, J2, and J3 are unused and should retain their initial settings.
EVM Connection (MYC0409-NA-EVM)
Figure 3. MYC0409-NA-EVM Connection: Illustrates the wiring for connecting the power supply and load to the MYC0409-NA-EVM, showing VIN, VOUT, VDD, and ground connections.
Start-Up Procedure (MYC0409-NA-EVM)
- Set the power supply current limit to at least 2A. Connect the power supply to VIN power(+) and VIN power(-).
- Set the power supply current limit to at least 1mA. Connect the power supply to VDD and VOUT power(-).
- Connect an electronic load (capacity > 6A) between Vout power(+) and Vout power(-). Do not turn on the load before PGOOD becomes high.
- Configure jumpers: Set PGOOD jumper (JPGOOD) to pull up VDD. Set EN jumper (JEN) to pull up Vin (indicated by a dot on the board). Set SYNCSEL jumper (JSYNC_SEL) as desired.
- Set VDD voltage to 5V and turn it on.
- Set input voltage to 48V and turn it on.
- Measure output voltages; VOUT should be Vin/4 = 12V.
- Slowly increase the load current while monitoring output voltages. Observe that outputs may drop as the module is a divider.
Quick Start Guide of MYC0409-NA-PARA-EVM
Figure 4 highlights the user interface items for the MYC0409-NA-PARA-EVM. VIN Power terminals connect to the input supply, and VOUT Power terminals connect to the load. Sense(+/-) test points for VIN and VOUT are for voltage monitoring and should not be used for power connections. The VPG input requires 3.3V or 5V for the PGOOD signal. A switch is available to enable or disable the module.
Figure 4. MYC0409-NA-PARA-EVM User Interface (Top view): Shows the evaluation board's interface, including VPG, PGOOD, Switch, EN, VIN power/sense terminals, and VOUT power/sense terminals.
Terminal Functions and Jumper Settings (MYC0409-NA-PARA-EVM)
Table 3 details the terminal functions and jumper settings for the MYC0409-NA-PARA-EVM.
| FUNCTION/TERMINAL | JUMPER (RECOMMENDATION) | DESCRIPTION |
|---|---|---|
| VIN power (+/-) | Power input pin and Input Ground pin. | |
| VOUT power (+/-) | Power output pin and output Ground pin. | |
| VIN sense (+/-) | Sensing pin for measuring the input voltage. | |
| VOUT sense (+/-) | Sensing pin for measuring the output voltage. | |
| EN | EN can be used to monitor voltage at the enable pin in the module. | |
| Switch | The switch can be controlled to enable or disable the module. | |
| PGOOD | PGOOD is Power GOOD pin. VPG must be applied to 3.3V or 5V for using the PGOOD signal. | |
| VPG | VPG is bias pin for PGOOD. |
Power Input and Output Descriptions: The VIN power terminal connects to the input supply, and the VOUT power terminal connects to the load. Caution: Sense terminals are for voltage monitoring only and are not designed for high current connections; doing so may damage PCB traces.
Test Point Descriptions: Sense(+) and Sense(-) test points for VIN and VOUT are for voltage monitoring with voltmeters.
EVM Connection (MYC0409-NA-PARA-EVM)
Figure 5. EVM Connection: Depicts the connection diagram for the evaluation board, showing power supply and load connections for VIN, VPG, and VOUT.
Start-Up Procedure (MYC0409-NA-PARA-EVM)
- Set the power supply current limit to at least 8A. Connect the power supply to VIN power(+) and VIN power(-).
- Connect the power supply for 3.3V or 5V to VPG.
- Connect an electronic load (capacity > 20A) between Vout power(+) and Vout power(-). Do not turn on the load before PGOOD becomes high.
- Turn on the 3.3V or 5V power supply.
- Set input voltage to 48V and turn it on.
- Measure output voltages; VOUT should be Vin/4 = 12V.
- Slowly increase the load current while monitoring output voltages. Observe that outputs may drop as the module is a divider.
Performance Data
Figures 6 through 12 present the performance data for both MYC0409-NA-EVM and MYC0409-NA-PARA-EVM, illustrating typical performance characteristics.
Figure 6. Efficiency (Linear, Log scale): Shows efficiency curves for both EVMs across different input voltages (VIN) versus output current (IOUT).
Figure 7. Output Voltage: Displays output voltage (VOUT) versus output current (IOUT) for both EVMs under various input voltage conditions.
Figure 8. Start-up Waveform: Oscilloscope captures of start-up sequences for both EVMs, showing VIN, VOUT, EN, and PGOOD signals over time.
Figure 9. Shutdown Waveform: Oscilloscope captures of shutdown sequences for both EVMs, showing VIN, VOUT, EN, and PGOOD signals over time.
Figure 10. VOUT Ripple Waveform: Oscilloscope captures of output voltage ripple for both EVMs under maximum load conditions.
Figure 11. Load Transient Response Waveform (0A to max): Oscilloscope captures demonstrating the output voltage response to a step change in load current from 0A to maximum for both EVMs.
Figure 12. Load Transient Response Waveform (max to 0A): Oscilloscope captures demonstrating the output voltage response to a step change in load current from maximum to 0A for both EVMs.
Bill of Materials (BOM)
Table 4. MYC0409-NA-EVM Bill of Materials: Lists components, values, descriptions, sizes, part numbers, and manufacturers for the MYC0409-NA-EVM.
| REFERENCE | VALUE | DESCRIPTION | SIZE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|---|
| C1 | 100uF | Input Capacitor | 1206 | GRM31CC72A4 75KE11 | Murata |
| C2 | 4.7uF | Input Capacitor 4.7uF, 100V,+/-10%, X7S | 1206 | GRM31CC71E2 26ME15 | Murata |
| C4, C5 | 22uF | Output Capacitor 22uF, 25V,+/-20%, X7S | 1206 | GRM31CC71E2 26ME15 | Murata |
| R1, R2 | 10KOhm | Pull up resistor for Power Good Indication Pull down resistor for Enable function 5%, 0.1W | 0402 | RK73B1ETTP10 3J | KOA |
| R13 | Jumper | 1206 | TLRZ2BTTD | KOA | |
| M1 | Power module | MYC0409-NA | Murata |
Table 5. MYC0409-NA-PARA-EVM Bill of Materials: Lists components, values, descriptions, sizes, part numbers, and manufacturers for the MYC0409-NA-PARA-EVM.
| REFERENCE | VALUE | DESCRIPTION | SIZE | PART NUMBER | MANUFACTURER |
|---|---|---|---|---|---|
| C1 | 100uF | Input Capacitor | 1206 | GRM31CC72A4 75KE11 | Murata |
| C3, C5, C7, C9 | 4.7uF | Input Capacitor 4.7uF, 100V,+/-10%, X7S | 1206 | GRM31CC71E2 26ME15 | Murata |
| C10, C11 C12, C13, C14, C15 C16, C17 | 22uF | Output Capacitor 22uF, 25V,+/-20%, X7S | 1206 | GRM31CC71E2 26ME15 | Murata |
| R1, R2, R3, R4, R9, R10 R11, R12, R14 R17, R19, R20 R22, R23, R25 R26, R28 R31, R32, R33 R34 | Jumper | 0402 | RK73Z1ETTP | KOA | |
| R5, R6 | 10KOhm 5%, 0.1W | Jumper | 1206 | TLRZ2BTTD | KOA |
| SW1 | Switch | 0402 | RK73B1ETTP10 3J G-12AP | KOA | |
| M1, M2, M3 M4 | Power module | MYC0409-NA | Murata |
Schematic
Figure 13. MYC0409-NA EVM Schematic: Provides the circuit schematic for the MYC0409-NA-EVM.
Figure 14. MYC0409-NA-PARA-EVM Schematic: Provides the circuit schematic for the MYC0409-NA-PARA-EVM.
EVM PCB Layout
Figure 15. MYC0409-NA-EVM Evaluation Board Layout (Top and Bottom): Shows the physical layout of the components on the MYC0409-NA-EVM board.
Figure 16. MYC0409-NA-PARA-EVM Evaluation Board Layout (Top and Bottom): Shows the physical layout of the components on the MYC0409-NA-PARA-EVM board.
Notices
CAUTION:
- EVMs are for R&D evaluation purposes only and are not finished products.
- Ensure products using Murata components are evaluated and confirmed to specifications.
- Product specifications are based on agreed usage conditions and environments. Do not deviate from these agreements.
- Contact Murata for concerns about materials not listed in the RoHS directive.
- Implement appropriate fail-safe functionality in products to prevent secondary damage from component failure.
- Do not expose Murata products to excess moisture.
Sales Contact: For additional information, contact Sales at muratalpdc@murata.com.
Disclaimers: Murata assumes no liability for the use of information in this document; use is at the user's own risk. No patent rights or licenses are implied. Murata products are not intended for life-support, surgical implant, or other critical applications where failure could cause injury or death. Murata assumes no liability for damages arising from such uses.
Copyright and Trademark: ©2024 Murata Manufacturing Co., Ltd. All rights reserved.
This product is subject to operating requirements and the Life and Safety Critical Application Sales Policy. Refer to: https://power.murata.com/en/requirements
Murata Manufacturing Co., Ltd. makes no representation that the use of its products will not infringe upon existing or future patent rights. Descriptions do not imply the granting of licenses. Specifications and cautions are subject to change without notice.
