UCD3138RHAR Texas Instruments Integrated Circuit (Quad Flat No-Lead) In Stock
Texas Instruments UCD3138RHAR is a highly integrated digital power controller for isolated power supplies featuring 3 feedback loops and 8 DPWM outputs in a 40-pin QFN package. Enables precise digital control of AC/DC and DC/DC converters with PMBus communication. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Quad Flat No-Lead
- Pin Count
- 41
- Lifecycle
- ACTIVE
- Datasheet
- UCD3138RHAR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $4.5896(MOQ 41)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of UCD3138RHAR?
- 3 independent feedback loops for simultaneous regulation of multiple isolated power rails within a single controller IC
- 8 digital PWM (DPWM) outputs enabling direct multi-phase or multi-output converter control without external PWM logic
- PMBus digital communication interface allowing real-time telemetry, margin testing, and firmware-configurable compensation in the field
- 40-pin QFN (S-PQCC-N40) package with minimal footprint and exposed pad for improved thermal performance in dense power-supply designs
What is UCD3138RHAR used for?
The UCD3138RHAR is designed for high-efficiency isolated power supplies such as LLC resonant converters, phase-shifted full-bridge designs, and multi-output AC/DC adapters used in telecom, server, and industrial power systems. Its 3 feedback loops and 8 DPWM outputs allow a single IC to manage primary switching, synchronous rectification, and auxiliary rail control simultaneously. The device also suits smart power bricks and on-board power modules where PMBus telemetry and digital loop compensation reduce time-to-market compared to analog controller alternatives.
What are the specifications of UCD3138RHAR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | DIGITAL POWER CONTROLLER |
| JESD-30 Code | S-PQCC-N40 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Number of Outputs | 8 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC40,.24SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 100mA |
| Supply Voltage-Max (Vsup) | 3.6V |
| Supply Voltage-Min (Vsup) | 3V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 3 |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.50 |
| Country of Origin | Philippines |
Where can I find the UCD3138RHAR datasheet?
UCD3138RHAR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for UCD3138RHAR?
Compatible alternatives and drop-in replacements for UCD3138RHAR:
Texas Instruments Fixed, 1 Channel, PQCC40
Frequently Asked Questions
How many DPWM outputs does the UCD3138RHAR provide and what converter topologies can it drive?
The UCD3138RHAR provides 8 digital PWM outputs. This count is sufficient to drive a full-bridge primary switch network with 4 outputs, plus 4 synchronous-rectifier gate signals, covering LLC resonant, phase-shifted full-bridge, and dual-active-bridge isolated DC/DC topologies in a single 40-pin QFN package without external PWM expansion logic.
What feedback loop capability does the UCD3138RHAR offer for multi-rail isolated power supplies?
The UCD3138RHAR integrates 3 independent feedback loops. Each loop has its own digital compensator, allowing simultaneous closed-loop regulation of a main output rail, an auxiliary rail, and a secondary feedback path. This is particularly valuable in telecom and server power supplies where 12 V, 5 V, and 3.3 V isolated outputs must maintain tight load regulation independently.
Does the UCD3138RHAR support PMBus communication, and what field management features does it enable?
Yes, the UCD3138RHAR supports PMBus digital communication. Over PMBus the host system can read real-time voltage, current, and temperature telemetry; adjust output voltage margins by specified millivolts for automated test; update digital compensator coefficients in the field; and trigger fault logging — all without hardware changes, reducing production test time and enabling firmware-configurable power profiles.
For a server power supply design, how does the 40-pin QFN package of the UCD3138RHAR affect thermal and layout performance?
The 40-pin QFN (S-PQCC-N40) package measures approximately 6 mm x 6 mm with an exposed thermal pad on the bottom. The exposed pad reduces junction-to-board thermal resistance to roughly 20°C/W in typical PCB layouts, allowing the UCD3138RHAR to operate within its rated temperature range even when surrounded by power FETs and inductors in a high-density 1U server power-supply module.
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Why Buy from FindMyChip
About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 41+ | $4.9627 | $203.47 |
| 53+ | $4.7762 | $253.14 |
| 66+ | $4.5896 | $302.91 |
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