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Texas Instruments TPS40428EVM-594
- Part No.:
- TPS40428EVM-594
- Manufacturer:
- Texas Instruments
- Package:
- Datasheet:
-
TPS40428EVM-594.pdf
- Description:
- EVAL BOARD FOR TPS40428
- Quantity:
- Payment:
- Shipping:
Inventory:4,668
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Product details
Overview
TPS40428EVM-594 from Texas Instruments is an evaluation module designed to demonstrate the TPS40428 dual-output, 2-phase, PMBus-enabled synchronous buck controller in a fully assembled, test-ready configuration. It delivers regulated 1.2 V @ 20 A and 1.8 V @ 20 A from a 7–14 V input, supports real-time monitoring/programming via PMBus, and includes dedicated test points for loop gain, transient response, and ripple analysis in power supply design validation.
For engineers reviewing the TPS40428EVM-594 datasheet, TPS40428EVM-594 test setup, TPS40428EVM-594 application configuration, or TPS40428EVM-594 alternative evaluation modules, this EVM provides factory-default smart-power mode operation with TI CSD95378B power stages, Fusion GUI integration, and full electrical performance characterization per SLVUA86.
Technical Context
The TPS40428EVM-594 implements a dual-rail, two-phase synchronous buck topology using the TPS40428RHA controller in smart-power mode - sourcing current and temperature feedback directly from TI's integrated smart power stages (CSD95378B). It operates at a fixed 500 kHz switching frequency and supports independent PMBus programming of UVLO (4.25 V turn-on / 4.0 V turn-off), soft-start, margining (±10% / –20%), and overcurrent thresholds (40 A fault limit).
Designed for low-voltage, high-current applications, the EVM features separate analog ground (AGND) and power ground (PGND) with single-point strapping near the controller pad, onboard +5 V generation via TPS62125DSG for power stage bias, and configurable jumpers (J1/J2/J3) to select between onboard or external +5 V sequencing - ensuring safe startup before PWM enable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 7 V to 14 V - supports standard 12-V intermediate bus with ±16.7% tolerance for system-level rail variation. |
| Output Voltages | 1.2 V @ 20 A and 1.8 V @ 20 A - dual independent rails optimized for FPGA core/I/O or processor core/memory supplies. |
| Switching Frequency | 500 kHz - enables use of compact 10 µH inductors and balances efficiency vs. EMI trade-offs. |
| Full-Load Efficiency | 90% (1.2 V rail) and 92% (1.8 V rail) at 12 VIN - reflects optimized gate drive and low-RDS(on) power stage integration. |
| Output Ripple | 10 mVpp per rail at 12 VIN/20 A - achieved via multi-capacitor parallel output filtering and careful layout for low-impedance paths. |
| PMBus Interface | Address 9 (decimal), SMBALERT, PMBCLK/PMBDATA - enables real-time telemetry (V/I/T), fault logging, and dynamic reconfiguration without hardware changes. |
Availability
TPS40428EVM-594 is available at Aetrix Electronics and suitable for wireless infrastructure baseband units, network switch/router power subsystems, and server VRM validation requiring stable component supply, pre-validated reference designs, and full documentation traceability.
Supply support for TPS40428EVM-594 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and power management solutions with deep expertise in power conversion and digital control.
The TPS40428EVM-594 belongs to TI's PWR594 evaluation platform family, engineered specifically to accelerate development of PMBus-configurable, multi-phase DC/DC converters for high-performance computing and communications infrastructure.
FAQ
What is the default operating mode of the TPS40428EVM-594?
The TPS40428EVM-594 ships configured for smart-power mode using the TPS40428 controller, which acquires current and temperature signals directly from TI CSD95378B smart power stages - eliminating need for external DCR sensing or thermal transistors. This is distinct from the TPS40425EVM-594, which defaults to DCR-based current sensing.
Which software is required to configure the TPS40428EVM-594?
The TI Fusion Digital Power Designer GUI is mandatory for configuring the TPS40428EVM-594. It communicates with the TPS40428 controller via PMBus using the TI USB-to-GPIO adapter (TI part #USB-TO-GPIO). The software enables real-time adjustment of output voltage trim/margin, UVLO thresholds, soft-start time, overcurrent warning/fault limits, and fault response behavior on the TPS40428EVM-594.
How is power sequencing handled between the +5 V bias rail and soft-start on the TPS40428EVM-594?
The TPS40428EVM-594 uses an onboard +5 V rail generated by U1 (TPS62125DSG) to power the CSD95378B power stages. FLT1/FLT2 pins of the TPS40428 are tied to the PG pin of the TPS62125 via diodes - preventing soft-start until the +5 V rail is valid. Jumper configuration (J1+J3 installed, J2 removed) enables this automatic sequencing; selecting external +5 V requires manual coordination per Section 4.3 of SLVUA86.
What test points are provided for control-loop analysis on the TPS40428EVM-594?
The TPS40428EVM-594 includes dedicated loop measurement points: CH1A/CH1B for Channel 1 and CH2A/CH2B for Channel 2 (Table 2, SLVUA86). These allow direct injection and response capture for Bode plot analysis using a network analyzer. Additional critical nodes - including COMP1/COMP2, PWM1/PWM2, SW1/SW2, and VSNS1/VSNS2 - are accessible via labeled test points TP10, TP21, TP13, TP26, TP22, TP25, TP9, and TP5 respectively.
Can the TPS40428EVM-594 be reconfigured for 2-phase operation per rail?
Yes - the TPS40428EVM-594 supports 2-phase interleaving per output rail by modifying the bill of materials as described in Section 11 and schematics Figure 42 of SLVUA86. The default configuration uses one phase per rail (total two phases), but adding a second power stage per rail and adjusting PHSET/SYNC routing enables true 2-phase operation on each 1.2 V and 1.8 V output - improving ripple cancellation and thermal distribution while maintaining the same TPS40428EVM-594 PCB footprint.
TPS40428EVM-594 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Packaging:
- Box
- Product Status:
- Active
- Main Purpose:
- DC/DC, Step Down
- Outputs and Type:
- 2 Non-Isolated Outputs
- Voltage - Output:
- -
- Current - Output:
- 1.2V, 1.8V
- Voltage - Input:
- 20A, 20A
- Regulator Topology:
- 7V ~ 14V
- Frequency - Switching:
- Buck
- Contents:
- 500kHz
- Utilized IC / Part:
- Board(s)
- Power - Output:
- TPS40428
TPS40428EVM-594 FAQ
1.How can I place an order for TPS40428EVM-594 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS40428EVM-594 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS40428EVM-594 reliable?
The price and inventory of TPS40428EVM-594 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS40428EVM-594 is usually 5 days.
3.What payment methods are accepted for TPS40428EVM-594?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS40428EVM-594 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS40428EVM-594?
TPS40428EVM-594 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS40428EVM-594 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS40428EVM-594?
For technical support, including TPS40428EVM-594 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS40428EVM-594 requirements.
6.How does Aetrix verify that TPS40428EVM-594 is sourced from the original manufacturer or authorized distributors?
All TPS40428EVM-594 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS40428EVM-594 meets industry standards.
7.What is the process for return or replacement of TPS40428EVM-594?
All TPS40428EVM-594 units undergo pre-shipment inspection (PSI). If there is an issue with TPS40428EVM-594, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS40428EVM-594 part is unused and in its original packaging.
Return procedure for TPS40428EVM-594:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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