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Texas Instruments UCD3138064RMHR
- Part No.:
- UCD3138064RMHR
- Manufacturer:
- Texas Instruments
- Category:
- Power Supply Controllers, Monitors
- Package:
- 40-WFQFN Exposed Pad
- Datasheet:
-
UCD3138064RMHR.pdf
- Description:
- DIGITAL CONTROLLER
- Quantity:
- Payment:
- Shipping:
Inventory:3,958
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Product details
Overview
UCD3138064RMHR from Texas Instruments is a highly integrated digital power controller for isolated DC/DC and AC/DC applications, featuring 64 kB flash (2×32 kB banks), dual-image firmware update capability without power interruption, 3 independent hardware PID-based feedback loops, 8×250-ps DPWM outputs, and support for phase-shifted full-bridge, LLC, and PFC topologies in telecom rectifiers and server PSUs.
For engineers reviewing the UCD3138064RMHR datasheet, UCD3138064RMHR pinout, UCD3138064RMHR application, or UCD3138064RMHR equivalent, key selection considerations include 40-pin QFN (RMH) package compatibility, 31.25-MHz ARM7TDMI-S core execution, 14-channel 12-bit ADC with internal temperature sensing, and programmable fault protection with 7 analog comparators - all critical for high-density, field-upgradable power supply designs.
Technical Context
The UCD3138064RMHR implements three dedicated Digital Power Peripherals (DPPs), each integrating an error ADC (EADC), 2-pole/2-zero configurable PID filter, and paired DPWM outputs - enabling simultaneous voltage, average-current, and peak-current mode control across isolated topologies. Its 31.25-MHz ARM7TDMI-S core manages real-time system monitoring, communication, and firmware orchestration while executing from on-chip flash or RAM.
Hardware acceleration includes 16-MHz EADC with 1-mV/LSB resolution, 8× oversampling, adaptive trigger positioning, and 14-bit effective DAC output; plus cycle-by-cycle current limiting, burst mode, ideal diode emulation, and synchronous rectifier soft switching - all optimized for efficiency across light-load to full-load operation in industrial and telecom power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Core Processor | 31.25-MHz 32-bit ARM7TDMI-S with 64 kB flash (2×32 kB banks) enabling dual-image firmware updates without power interruption |
| DPWM Resolution | 250-ps pulse width, 4-ns frequency/phase resolution supporting up to 2-MHz switching in LLC and PSFB converters |
| EADC Performance | Up to 16-MHz sampling, 1-mV/LSB min resolution, 8× hardware averaging, and adaptive trigger positioning for precise loop response |
| Feedback Loops | 3 independent hardware PID-based loops with 2-pole/2-zero configuration, supporting voltage, peak/average current, and constant-power modes |
| ADC System | 14-channel 12-bit 267-ksps general-purpose ADC + internal temperature sensor (Ch14), with programmable filters and dual sample-and-hold |
| Fault Protection | 7 analog + 4 digital comparators, cycle-by-cycle current limiting, programmable blanking time, and 4 external fault inputs (FAULT0–FAULT3) |
| Package & Temp | 40-pin WQFN (RMH), 6.00 mm × 6.00 mm, –40°C to +125°C operating range with integrated thermal pad for robust thermal management |
Pinout & Package
UCD3138064RMHR uses a 40-pin WQFN (RMH) package with 6.00 mm × 6.00 mm body size, exposed thermal pad tied to DGND/AGND, and four corner anchor pins requiring soldering for mechanical reliability and thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–4, 29–30, 36 | Analog Ground (AGND) | Reference for EADC channels, comparator inputs, and analog supply filtering; must be low-impedance and separated from DGND at PCB level |
| 6, 26, 40 | Digital Ground (DGND) | Return path for digital I/O, DPWM outputs, and core logic; requires separate plane with single-point tie to AGND near V33D/V33A decoupling |
| 7 | /RESET | Active-low asynchronous reset input with internal pull-up; used for cold start, brown-out recovery, and system-level fault shutdown coordination |
| 8 | ADC_EXT_TRIG / TCAP / SYNC / PWM0 | Multi-function pin: external ADC trigger source, timer capture input, DPWM synchronization master/slave signal, or general-purpose PWM output |
| 11–18 | DPWM0A–DPWM3B | Eight high-resolution DPWM outputs (4 complementary pairs); support adjustable dead-time, phase shift, and cycle-by-cycle duty matching for multi-phase topologies |
| 31–32 | EAP0/EAN0, EAP1/EAN1, EAP2/EAN2 | Three differential error amplifier inputs for feedback loops; EAP2/EAN2 recommended for peak-current-mode sensing in PSFB/LLC configurations |
| 35 | AD02 | ADC channel 2 input tied to comparator A and current-share circuitry; used for primary-side current sensing or load-sharing reference |
| 38–40 | AD00, AD01, AD02 | ADC inputs with integrated current sources for resistive current-sense or voltage-divider scaling; enable copper-trace sensing and isolated feedback calibration |
Key Features
| Feature | Design Value |
|---|---|
| Dual-bank 64-kB flash | Enables field firmware updates by executing from Bank 1 while programming Bank 2 - zero downtime during feature upgrades or bug fixes |
| Hardware PID + EADC | Each of 3 DPPs integrates dedicated 16-MHz error ADC and configurable 2-pole/2-zero compensator - eliminates software loop overhead and ensures sub-µs control latency |
| 8×250-ps DPWM outputs | Supports interleaved, phase-shifted, and resonant topologies with precise timing alignment; enables <1% duty-cycle mismatch across 4 DPWM pairs |
| 7-analog-comparator fault engine | Provides independent overvoltage, undervoltage, overcurrent, and thermal trip detection with programmable blanking and fault-counting - reduces need for external protection ICs |
| Peak/average/current/voltage mode | Configurable per-loop control scheme selection via firmware register; supports PFC, PSFB, LLC, and hard-switched topologies without hardware change |
| Burst mode + ideal diode emulation | Automatically engages at light load to reduce standby power; emulates synchronous rectifier turn-on/turn-off timing - improves efficiency below 10% load |
Applications
| Telecom Rectifiers | Server PSU Modules |
|---|---|
Use Scenario: 48-V input, 12-V/54-A isolated DC/DC module in carrier-grade telecom shelf with hot-swap and PMBus telemetry. IC Role / Device Role / Timing Role: Primary-side digital controller managing phase-shifted full-bridge regulation, input voltage feed-forward, and real-time current sharing across parallel modules. Use Value: 250-ps DPWM resolution enables precise ZVS timing control; dual-flash banks allow remote firmware patching during maintenance windows without service interruption. |
Use Scenario: 380-V DC input, 12-V/200-A VRM in AI accelerator rack with dynamic load steps and strict ripple requirements. IC Role / Device Role / Timing Role: Dual-loop controller regulating output voltage and average current, with burst-mode activation below 5-A load and synchronous rectifier soft switching. Use Value: 16-MHz EADC captures fast transients; hardware PID loops respond within 200 ns - maintaining ±10 mV regulation during 100-A/µs load steps. |
| PFC Front-End Stages | Isolated DC/DC Converters |
Use Scenario: Bridgeless totem-pole PFC stage in 3-kW OCP-compliant server PSU with THD <3% at full load. IC Role / Device Role / Timing Role: Voltage-mode controller with input-voltage feed-forward and constant-power regulation, using ADC channels AD00–AD02 for line sensing and current reconstruction. Use Value: 14-channel ADC with dual sample-and-hold captures simultaneous line voltage and current waveforms; programmable averaging filters suppress switching noise without sacrificing bandwidth. |
Use Scenario: 400-V to 48-V isolated DC/DC converter in industrial PLC power supply with reinforced isolation and 1500-V RMS creepage. IC Role / Device Role / Timing Role: Secondary-side regulated controller using primary-side voltage sensing and flux balancing to eliminate optocoupler dependency. Use Value: Primary-side voltage sensing and flux balancing algorithms reduce component count by 4 parts; internal temperature sensor enables derating before thermal shutdown. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCD3138RMHR | 32-kB flash (single bank), no SPI, one I²C port, 7-channel ADC, 6 analog comparators | Lacks dual-image firmware update, reduced communication flexibility, and lower ADC channel count - suitable for cost-sensitive, fixed-function PFC-only designs | Select UCD3138RMHR only when field firmware updates are unnecessary and system complexity is low (e.g., single-loop PFC with basic telemetry) |
| UCD3138064RGC | 64-kB flash, same core/peripherals, but 64-pin VQFN (9×9 mm) with 14-channel ADC and full 7-analog-comparator set | Offers higher pin count for expanded GPIO, additional DPWM routing, and full ADC channel access - preferred for multi-output or modular PSU designs | Choose UCD3138064RGC when layout allows larger footprint and design requires all 14 ADC channels or enhanced fault monitoring granularity |
Compared with UCD3138RMHR, the UCD3138064RMHR adds field-upgradable firmware and richer communication; versus UCD3138064RGC, it trades ADC channel count and GPIO for compact 40-pin packaging - making it optimal for space-constrained, dual-loop isolated DC/DC modules requiring upgradeability.
Availability
UCD3138064RMHR is available at Aetrix Electronics and suitable for telecom rectifiers, server PSU modules, and isolated DC/DC converters requiring stable component supply, long-term lifecycle support, and field-programmable digital control architecture.
Supply support for UCD3138064RMHR 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 specializing in analog, embedded processing, and power management technologies, with decades of expertise in digital power control ICs and system-level reference designs.
The UCD3138064RMHR belongs to TI's Fusion Digital Power™ controller family, designed specifically for high-efficiency, high-density isolated power conversion in telecom, enterprise computing, and industrial infrastructure - emphasizing firmware flexibility, hardware-accelerated control, and seamless toolchain integration.
FAQ
What is the maximum DPWM switching frequency supported by the UCD3138064RMHR?
The UCD3138064RMHR supports DPWM switching frequencies up to 2 MHz, enabled by its 250-ps pulse-width resolution and 4-ns frequency/phase resolution. This capability is essential for high-frequency LLC resonant converters and phase-shifted full-bridge topologies where precise timing control directly impacts ZVS performance and efficiency. The UCD3138064RMHR maintains this specification across its full operating temperature range (–40°C to +125°C) with appropriate gate driver selection and PCB layout.
Does the UCD3138064RMHR support dual-firmware image updates without power interruption?
Yes, the UCD3138064RMHR features two independent 32-kB flash banks that allow execution from one bank while programming the other - enabling true in-field firmware updates without shutting down the power supply. This functionality is implemented in hardware and supported by TI's Fusion Digital Power Studio GUI and bootloader firmware. The UCD3138064RMHR uses this capability to deliver new features or security patches during maintenance windows, preserving system uptime in mission-critical telecom and server applications.
How many independent feedback loops can the UCD3138064RMHR control simultaneously?
The UCD3138064RMHR integrates three fully independent Digital Power Peripherals (DPPs), each with dedicated error ADC, 2-pole/2-zero PID filter, and DPWM output pair - enabling simultaneous regulation of up to three isolated output voltages or combined voltage/current loops. Each loop operates autonomously in hardware, eliminating CPU intervention and ensuring deterministic sub-microsecond response. This architecture makes the UCD3138064RMHR suitable for multi-rail server PSUs and redundant telecom rectifiers where cross-regulation and fault isolation are critical.
What ADC resources are available on the UCD3138064RMHR package?
The UCD3138064RMHR provides 7 external ADC input channels (AD00–AD03, AD06, AD04, AD13) plus an internal temperature sensor mapped to ADC channel 14 - totaling 8 usable analog measurement points. All channels support programmable averaging filters, dual sample-and-hold, and configurable gain scaling. Unlike the 64-pin RGC variant, the RMH package does not expose AD05, AD08–AD12, or AD11, limiting total external channel count to seven. These ADC resources are sufficient for line voltage, output voltage, primary/secondary current, and thermal monitoring in compact 40-pin designs.
Which communication interfaces are available on the UCD3138064RMHR?
The UCD3138064RMHR includes one PMBus/I²C interface (PMBUS_CLK/PMBUS_DATA), one UART (SCI_RX0/SCI_TX0), and one SPI interface (SPI_MOSI/SPI_MISO/SPI_CLK/SPI_CS). It lacks the second I²C port and second UART found on the 64-pin RGC variant. All interfaces support standard baud rates and protocol framing, with PMBus providing standardized telemetry (VOUT, IOUT, TEMP, STATUS) and fault logging. The UCD3138064RMHR uses these interfaces for real-time monitoring, configuration, and firmware updates in networked power systems.
UCD3138064RMHR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 40-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Digital Power Controller
- Voltage - Input:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 40-WQFN (6x6)
UCD3138064RMHR FAQ
1.How can I place an order for UCD3138064RMHR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCD3138064RMHR 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 UCD3138064RMHR reliable?
The price and inventory of UCD3138064RMHR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCD3138064RMHR is usually 5 days.
3.What payment methods are accepted for UCD3138064RMHR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCD3138064RMHR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCD3138064RMHR?
UCD3138064RMHR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCD3138064RMHR 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 UCD3138064RMHR?
For technical support, including UCD3138064RMHR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCD3138064RMHR requirements.
6.How does Aetrix verify that UCD3138064RMHR is sourced from the original manufacturer or authorized distributors?
All UCD3138064RMHR 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 UCD3138064RMHR meets industry standards.
7.What is the process for return or replacement of UCD3138064RMHR?
All UCD3138064RMHR units undergo pre-shipment inspection (PSI). If there is an issue with UCD3138064RMHR, 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 UCD3138064RMHR part is unused and in its original packaging.
Return procedure for UCD3138064RMHR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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