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Texas Instruments UCD9240PFC
- Part No.:
- UCD9240PFC
- Manufacturer:
- Texas Instruments
- Category:
- Power Management - Specialized
- Package:
- 80-TQFP
- Datasheet:
-
UCD9240PFC.pdf
- Description:
- IC DGTL PWM SYSTEM CTRLR 80-TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,801
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Product details
Overview
UCD9240PFC from Texas Instruments is a digital PWM system controller for multi-rail, multi-phase non-isolated synchronous buck DC/DC power supplies. It controls up to four voltage rails and eight phases, supports switching frequencies up to 2 MHz with 250 ps duty-cycle resolution, delivers 1 mV closed-loop resolution, and integrates hardware-accelerated 3-pole/3-zero digital compensators for FPGA, DSP, and memory power delivery in servers and telecom equipment.
For engineers reviewing the UCD9240PFC datasheet, UCD9240PFC pinout, UCD9240PFC application, or UCD9240PFC equivalent, key selection considerations include its 80-pin TQFP package, PMBus/I²C/SMBus interface, real-time current/temperature monitoring, phase shedding capability, and Fusion Digital Power™ Designer configurability for production-grade power system tuning.
Technical Context
The UCD9240PFC implements an ARM7-based digital control architecture with dedicated per-rail error amplifiers (EAp/EAn), 12-bit ADCs, and independent DPWM generators per phase. Its analog front end includes four differential error amplifier inputs, eight current-sense comparator inputs (CS-1A through CS-4B), and hardware fault detection circuits operating independently of the ADC sequencer.
It features a programmable internal 3.3-V linear regulator controller, supports external 3.3-V supply options, and integrates flash memory with ECC for configuration storage. The device enables precise voltage tracking, sequencing, margining, and intelligent phase management-including current/temperature balancing and dynamic phase adding/shedding-without external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Rails | 4 independent voltage rails - enables single-chip control of core, I/O, memory, and auxiliary supplies |
| Max Phases Supported | 8 phases - allows high-current output scaling with thermal and efficiency optimization |
| Switching Frequency | 15.26 kHz to 2 MHz - supports high-density designs with fast transient response |
| Duty-Cycle Resolution | 250 ps - enables fine-grained regulation at high frequencies and low duty cycles |
| Closed-Loop Resolution | 1 mV - ensures tight output voltage tolerance for sensitive logic loads like FPGAs |
| ADC Monitoring Rate | Up to 250 kSPS - provides sub-100 µs sampling intervals for real-time fault detection |
| Nonvolatile Memory | Flash with ECC - retains calibrated configurations for >100 years and supports 20k write cycles |
Pinout & Package
UCD9240PFC is housed in an 80-pin TQFP (Thin Quad Flat Package) with exposed thermal pad, rated for –40°C to +110°C operation. Pin assignments are fully defined in TI's SLUS766C datasheet, including dedicated analog, digital, power, and communication terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EAp1–EAp4 / EAn1–EAn4 | Differential error amplifier inputs | Four independent rail feedback channels supporting ±Vsens routing for accurate voltage loop closure |
| DPWM-1A–DPWM-4B | Digital PWM outputs | Eight high-resolution DPWM signals driving gate drivers for up to 4 dual-phase rails |
| CS-1A–CS-4B | Current sense analog inputs | Eight comparator-based inputs for overcurrent protection and phase current balancing |
| PMBus_Clk / PMBus_Data | PMBus interface pins | Standardized two-wire bus for configuration, telemetry, and fault logging per PMBus v1.2 |
| V33A / V33D / V33DIO | Power supply inputs | Separate analog, digital core, and digital I/O rails minimize noise coupling and improve ADC accuracy |
Key Features
| Feature | Design Value |
|---|---|
| Hardware-accelerated 3P/3Z compensator | Enables stable loop response without external op-amps or passive RC networks |
| Real-time current & temperature balancing | Maintains ≤±3% phase current mismatch across all enabled phases under load transients |
| Phase adding/shedding logic | Automatically enables/disables phases based on load demand to maximize efficiency at light and full load |
| Sync In / Sync Out alignment | Allows deterministic clock synchronization across multiple UCD9240PFC devices for coherent multi-rail timing |
| Fan monitoring & PWM control | Supports tachometer input (30–300k RPM range) and 1% duty-cycle resolution for acoustic and thermal management |
Applications
| Server CPU Core Power | Telecom Line Card Supply |
|---|---|
Use Scenario: Regulating 0.8–1.2 V core voltage for high-end server CPUs with dynamic load steps exceeding 100 A/µs. IC Role / Device Role / Timing Role: Primary digital PWM controller managing 4-phase VR12-compliant output with adaptive voltage positioning (AVP). Use Value: Achieves <300 µs overvoltage fault response and 1 mV regulation accuracy under rapid load transients. | Use Scenario: Powering multiple ASICs and SerDes on a 3U telecom line card requiring strict sequencing and margining. IC Role / Device Role / Timing Role: Centralized multi-rail supervisor coordinating 4 independent outputs (1.2 V, 1.8 V, 2.5 V, 3.3 V) with programmable ramp rates. Use Value: Eliminates discrete sequencing ICs and reduces BOM count by integrating tracking, soft-start, and fault logging. |
| FPGA & Memory Subsystem | Industrial ATE Power System |
Use Scenario: Delivering tightly regulated 0.9 V and 1.2 V to FPGA fabric and DDR4 memory banks in test equipment. IC Role / Device Role / Timing Role: Dual-rail controller with synchronized DPWM clocks and shared current sensing for rail-to-rail current balancing. Use Value: Enables simultaneous voltage ramping with <10 mV inter-rail skew and real-time current reporting via PMBus. | Use Scenario: Programmable bench power supply module supporting variable output voltages and current limits for automated test fixtures. IC Role / Device Role / Timing Role: Configurable digital power manager with user-defined fault thresholds, margining commands, and nonvolatile calibration storage. Use Value: Reduces firmware development time via Fusion Digital Power™ Designer GUI and supports field updates via PMBus STORE_DEFAULT_ALL. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar multi-phase digital PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCD9244RGCT | 64-pin QFN package; supports only 4 phases (not 8); identical feature set and register compatibility | Better suited for space-constrained 4-phase designs where thermal pad soldering is preferred over TQFP reflow | Select UCD9244RGCT when board area is critical and phase count ≤4; UCD9240PFC remains optimal for 6–8 phase systems. |
| LM25069A | Analog hot-swap controller with integrated MOSFET driver; no digital PWM, no multi-phase support, no PMBus | Targets inrush limiting and overcurrent protection only-not closed-loop regulation or rail coordination | Choose LM25069A for standalone input protection; UCD9240PFC is required for full digital power system control. |
Compared with UCD9244RGCT, UCD9240PFC offers higher phase scalability and TQFP manufacturability; versus LM25069A, it delivers complete digital power management-not just protection-enabling programmable regulation, telemetry, and system-level coordination.
Availability
UCD9240PFC is available at Aetrix Electronics and suitable for server, telecom infrastructure, FPGA power, industrial ATE, and storage system applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCD9240PFC 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 high-reliability power conversion solutions.
The UCD9240 product line was designed specifically for digitally controlled, multi-phase, non-isolated DC/DC power systems in datacenter, networking, and high-performance computing environments-emphasizing configurability, fault resilience, and system-level integration.
FAQ
What is the maximum number of phases supported by the UCD9240PFC?
The UCD9240PFC supports up to eight phases across four voltage rails. This is implemented via eight independent DPWM outputs (DPWM-1A through DPWM-4B), enabling flexible configurations such as 2×4-phase, 4×2-phase, or asymmetric distributions. Phase management-including automatic adding/shedding-is handled in hardware, reducing MCU overhead. The UCD9240PFC datasheet confirms this capability in both the Functional Block Diagram and Electrical Characteristics sections.
Does the UCD9240PFC require external compensation components?
No, the UCD9240PFC does not require external compensation components. It integrates a hardware-accelerated 3-pole/3-zero digital compensator with non-linear gain for improved transient performance. Compensation coefficients are stored in on-chip flash and can be tuned using Texas Instruments' Fusion Digital Power™ Designer software. This eliminates external op-amps, resistors, and capacitors traditionally needed for analog loop compensation in multi-phase controllers.
What communication interfaces does the UCD9240PFC support?
The UCD9240PFC supports PMBus v1.2, SMBus 2.0, and I²C protocols via dedicated PMBus_Clk and PMBus_Data pins. It operates at up to 1 MHz in slave mode and includes PMBus Alert and Control pins for interrupt-driven telemetry. All command sets-including configuration, monitoring, and fault logging-are fully compliant with PMBus standards, enabling seamless integration into existing power management ecosystems without custom firmware.
How does the UCD9240PFC handle overcurrent protection?
The UCD9240PFC implements three-tier overcurrent protection: (1) hardware comparators on each CS input (response <4 µs), (2) digital ADC-based current monitoring (response <100 µs), and (3) PMBus-configurable fault thresholds with programmable response actions. For example, CLF-A events disable individual DPWM outputs within 4 cycles, while CLF-B events disable remaining outputs in <10 + 3×NumPhases µs. This layered approach ensures robust protection across fast transients and sustained overload conditions.
Is the UCD9240PFC pin-compatible with other UCD92xx family members?
No, the UCD9240PFC is not pin-compatible with other UCD92xx variants. Its 80-pin TQFP (PFC) footprint differs from the 64-pin QFN (RGC/RGCT) packages used by UCD9244 and UCD9222. Pin functions also vary-e.g., UCD9240PFC includes dedicated TMUX-2 and additional AVSS pins not present in 64-pin versions. Migration requires PCB redesign; however, register mapping and firmware are largely compatible across the UCD92xx family.
UCD9240PFC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Fusion Digital Power™
- Package/Case:
- 80-TQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Applications:
- Special Purpose
- Current - Supply:
- -
- Voltage - Supply:
- 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 110°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 80-TQFP (12x12)
UCD9240PFC FAQ
1.How can I place an order for UCD9240PFC through Aetrix?
Please submit a Request for Quotation (RFQ) for UCD9240PFC 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 UCD9240PFC reliable?
The price and inventory of UCD9240PFC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCD9240PFC is usually 5 days.
3.What payment methods are accepted for UCD9240PFC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCD9240PFC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCD9240PFC?
UCD9240PFC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCD9240PFC 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 UCD9240PFC?
For technical support, including UCD9240PFC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCD9240PFC requirements.
6.How does Aetrix verify that UCD9240PFC is sourced from the original manufacturer or authorized distributors?
All UCD9240PFC 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 UCD9240PFC meets industry standards.
7.What is the process for return or replacement of UCD9240PFC?
All UCD9240PFC units undergo pre-shipment inspection (PSI). If there is an issue with UCD9240PFC, 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 UCD9240PFC part is unused and in its original packaging.
Return procedure for UCD9240PFC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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