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Texas Instruments UCC25230DRMT
- Part No.:
- UCC25230DRMT
- Manufacturer:
- Texas Instruments
- Package:
- 8-VDFN Exposed Pad
- Datasheet:
-
UCC25230DRMT.pdf
- Description:
- IC REG BUCK FLYBACK ADJ 8VSON
- Quantity:
- Payment:
- Shipping:
Inventory:3,199
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Product details
Overview
UCC25230DRMT from Texas Instruments is a highly integrated PWM controller IC operating as an isolated forward-flyback (Flybuck™) converter with integrated 110-V high- and low-side power switches, fixed 380-kHz switching frequency, 12–100-V input range, and up to 0.2-A output current - designed for high-density isolated standby bias supplies in telecom and industrial power systems.
For engineers reviewing the UCC25230DRMT datasheet, UCC25230DRMT pinout, UCC25230DRMT application, or UCC25230DRMT equivalent, key selection considerations include its VIN_G open-drain fault signal, internal 2.5-V reference accuracy (±2%), cycle-by-cycle current limiting with frequency foldback, voltage-mode control with input feedforward, and thermally enhanced 4-mm × 4-mm SON-8/S-PVSON-N8 (DRM) package with PowerPad™ ground pad.
Technical Context
The UCC25230DRMT implements voltage-mode PWM control with input-voltage feedforward (RAMP magnitude = VIN × 6%), enabling stable output filter design across wide input ranges. Its internal error amplifier features 2.5-V reference (±2% over temperature), 40–80 dB open-loop gain, and COMP output swing from 0.4 V to VDD–0.7 V.
It integrates dual 110-V MOSFETs (RDS(on) high: 6–15 Ω; RDS(on) low: 5–10 Ω), programmable UV/OV detection (1.0–1.1 V undervoltage, 4.5–5.5 V overvoltage), and a dedicated 9-V VDD regulator (±5 mV line/load regulation) capable of sourcing up to 2 mA - all synchronized to a fixed 380-kHz oscillator (±15% variation over input voltage).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 12 V to 100 V DC (105-V surge tolerance); enables direct use in 24-V/48-V telecom rails without pre-regulation. |
| Switching Frequency | Fixed 380 kHz (324–445 kHz range); balances EMI, efficiency, and magnetics size for compact isolated bias designs. |
| VDD Output | 9.0 V ±60 mV (±0.7%); powers external circuitry (e.g., PWM controllers, logic) with up to 2 mA load capability. |
| Reference Voltage | 2.50 V ±0.10 V (±4% max over –40°C to +125°C); sets output voltage accuracy via FB divider ratio. |
| Current Limit | Cycle-by-cycle peak limit: –400 mA (high-side), +400 mA (low-side); prevents MOSFET failure during startup into capacitive loads. |
| Soft Start Time | 2.05 ms typical (1.75–2.35 ms); ensures monotonic ramp-up of primary and secondary voltages without overshoot. |
| UV/OV Thresholds | Programmable: UV falling threshold 0.9–1.1 V; OV rising threshold 4.5–5.5 V; provides configurable input rail monitoring. |
| Thermal Package | SON-8/S-PVSON-N8 (DRM), 4 mm × 4 mm, PowerPad™ bottom thermal pad; achieves θJCbot = 2.3°C/W for high-power-density thermal management. |
Pinout & Package
The UCC25230DRMT uses a thermally enhanced 8-pin SON package (DRM) with exposed GND PAD (pin 9) serving as both electrical ground and primary thermal path. The package measures 4.0 mm × 4.0 mm × 1.0 mm max height and requires soldering the PowerPad™ to PCB copper for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PHASE (1) | Half-bridge output node | Drives coupled inductor primary; connects to BOOT capacitor for high-side gate drive; withstands –2 V to VIN+1 V. |
| BOOT (2) | High-side gate driver supply | Accepts 0.1-µF bootstrap capacitor between BOOT and PHASE; supplies level-shifted voltage to upper FET gate. |
| UV/OV (3) | Window comparator input | Monitors input rail via external resistor divider; triggers VIN_G when voltage falls below 1.0 V or rises above 5.0 V. |
| VIN_G (4) | Open-drain fault indicator | Signals UV/OV condition externally; sinks ≥5 mA at 5.5 V max; remains functional even during fault events. |
| FB (5) | Error amplifier inverting input | Connects to output voltage divider; referenced to internal 2.5-V precision bandgap; supports compensation network. |
| COMP (6) | Error amplifier output | Drives PWM comparator; voltage range 0.4 V to VDD–0.7 V; determines duty cycle; accepts RC compensation to FB. |
| VDD (7) | Internal LDO output | 9-V regulated supply for internal circuitry and external loads ≤2 mA; bypassed with 1-µF ceramic capacitor. |
| VIN (8) | Main power input | Supplies high/low-side switches and bias regulator; requires ≥1-µF low-ESR ceramic bypass to GND PAD. |
| GND PAD (9) | Power and thermal ground | Exposed copper pad; must be soldered to large PCB ground plane for thermal dissipation and noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Flybuck™ topology integration | Enables isolated bias generation without optocoupler or third transformer winding - reduces BOM count and improves dynamic response vs. flyback. |
| Voltage-mode control with feedforward | Input-voltage feedforward (RAMP = VIN × 6%) stabilizes loop gain across 12–100-V input range, simplifying output filter design. |
| Integrated 110-V power switches | Eliminates external MOSFETs and drivers; high-side RDS(on) ≤15 Ω and low-side RDS(on) ≤10 Ω at 48 V enable >85% efficiency at full load. |
| Programmable UV/OV detection | Configurable thresholds (1.0 V UV, 5.0 V OV) with hysteresis allow precise input rail qualification before system enable. |
| 2-ms internal soft start | Guarantees monotonic rise of primary and secondary voltages; prevents inrush-induced stress on output capacitors and downstream regulators. |
| VIN_G fault signaling | Fast-propagation open-drain output alerts host controller of input faults while allowing continued operation for controlled shutdown sequencing. |
Applications
| Telecom Standby Bias Supply | Industrial Isolated Auxiliary Rail |
|---|---|
Use Scenario: Provides isolated 9-V bias for UCD3k digital PWM controllers and C2000 microcontrollers in 48-V telecom rectifier modules. IC Role / Device Role / Timing Role: Primary-side isolated auxiliary converter implementing Flybuck™ topology to generate regulated 9-V output from 36–75-V input. Use Value: Eliminates need for optocoupler and third transformer winding, reducing solution size by >30% and improving transient response vs. traditional flyback. | Use Scenario: Generates isolated 5-V/3.3-V auxiliary power for PLC I/O modules operating from 24-V DC field bus with surge immunity. IC Role / Device Role / Timing Role: Standby converter delivering up to 0.2-A output with 105-V surge tolerance and VIN_G fault flag for system-level diagnostics. Use Value: Integrated 110-V switches and programmable UV/OV enable robust operation in harsh industrial environments without external protection circuitry. |
| Server PSU Auxiliary Supply | Medical Equipment Isolated Logic Power |
Use Scenario: Powers fan controllers, PMBus interface, and hot-swap sequencers in 12-V/48-V server power supplies requiring high reliability. IC Role / Device Role / Timing Role: Always-on bias supply with 2-ms soft start and cycle-by-cycle current limiting to survive cold-start into high-capacitance loads. Use Value: Internal 9-V VDD regulator (2 mA sink/source) powers external logic without additional LDOs, minimizing component count and board area. | Use Scenario: Supplies isolated 3.3-V logic power for patient-monitoring front-end ADCs and isolation barriers in Class II medical devices. IC Role / Device Role / Timing Role: Safety-isolated auxiliary converter meeting creepage/clearance requirements via transformer-based Flybuck™ architecture. Use Value: Fixed 380-kHz switching frequency enables predictable EMI filtering; 2.5-V reference accuracy (±2%) ensures stable ADC reference voltage generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar isolated auxiliary converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC25231DRMT | Same pinout and Flybuck™ architecture; differs only in UVLO threshold (UCC25231: 8.5 V rising, 7.8 V falling vs. UCC25230: 7.5 V rising, 6.8 V falling). | UCC25231 targets higher-input systems where tighter VDD UVLO margin is required; not drop-in compatible if existing design relies on UCC25230's lower threshold. | Select UCC25231 only when VDD UVLO hysteresis must be increased beyond 0.7 V or system startup voltage exceeds 8.0 V. |
| LM5180QDGQRQ1 | Automotive-grade 100-V flyback controller (no integrated switches); requires external MOSFETs, optocoupler, and TL431; 650-kHz max frequency. | Supports AEC-Q100 Grade 1 (–40°C to +125°C), but adds complexity and cost due to discrete power stage and feedback loop. | Choose LM5180QDGQRQ1 only for automotive applications requiring ASIL-B compliance or where external switch control is mandatory. |
Compared with UCC25231DRMT, the UCC25230DRMT offers lower VDD UVLO for earlier startup in low-input scenarios; versus LM5180QDGQRQ1, it delivers higher integration, smaller footprint, and simplified layout - but lacks automotive qualification and requires no optocoupler or external MOSFETs.
Availability
UCC25230DRMT is available at Aetrix Electronics and suitable for telecom standby bias supplies, industrial isolated auxiliary rails, and server PSU auxiliary power requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for UCC25230DRMT 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 company specializing in analog, embedded processing, and power management technologies, with leadership in high-reliability power conversion ICs.
The UCC25230DRMT belongs to TI's Flybuck™ isolated converter product line, designed specifically to simplify high-density, low-component-count auxiliary power solutions for telecom, industrial, and computing applications.
FAQ
What is the maximum continuous output current supported by the UCC25230DRMT?
The UCC25230DRMT supports up to 0.2-A output current in isolated Flybuck™ configurations. This rating assumes proper thermal management using the exposed GND PAD, recommended 4-layer PCB layout with ≥2 oz copper on ground plane, and operation within the –40°C to +125°C ambient range. Peak current capability reaches ±400 mA per switch under cycle-by-cycle limiting.
Does the UCC25230DRMT require an external optocoupler for regulation?
No, the UCC25230DRMT does not require an external optocoupler. It implements primary-side regulation using the Flybuck™ topology, where output voltage is sensed indirectly via the primary-side capacitor voltage (VPRI) and fed back through the FB pin. This eliminates optocouplers, third transformer windings, and associated compensation complexity.
How is the switching frequency set on the UCC25230DRMT?
The switching frequency of the UCC25230DRMT is internally fixed at 380 kHz (typical), with a production range of 324–445 kHz. No external components are required to set or adjust frequency - it is determined by the internal oscillator and cannot be modified via pins or resistors. Frequency variation remains within ±15% across the full 12–100-V input range.
What is the purpose of the VIN_G pin on the UCC25230DRMT?
The VIN_G pin on the UCC25230DRMT is an open-drain output that signals input rail status based on the UV/OV pin voltage. When UV/OV falls below 1.0 V or rises above 5.0 V, VIN_G pulls low to indicate fault; otherwise it remains high-impedance. The UCC25230DRMT continues normal operation regardless of VIN_G state, enabling external fault-handling without disrupting bias supply.
Can the UCC25230DRMT operate with input voltages below 12 V?
No, the UCC25230DRMT has a minimum recommended input voltage of 12 V per TI's datasheet. Operation below this level may result in insufficient gate drive, unstable regulation, or failure to initiate soft start. While absolute maximum ratings list –0.3 V, functional operation is only guaranteed from 12 V to 100 V, with 105-V surge tolerance for <1 ms.
UCC25230DRMT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive, Isolation Capable
- Topology:
- Buck, Flyback, Forward Converter
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 12V
- Voltage - Input (Max):
- 75V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 90V
- Current - Output:
- 200mA
- Frequency - Switching:
- 380kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSON (4x4)
UCC25230DRMT FAQ
1.How can I place an order for UCC25230DRMT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC25230DRMT 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 UCC25230DRMT reliable?
The price and inventory of UCC25230DRMT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC25230DRMT is usually 5 days.
3.What payment methods are accepted for UCC25230DRMT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC25230DRMT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC25230DRMT?
UCC25230DRMT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC25230DRMT 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 UCC25230DRMT?
For technical support, including UCC25230DRMT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC25230DRMT requirements.
6.How does Aetrix verify that UCC25230DRMT is sourced from the original manufacturer or authorized distributors?
All UCC25230DRMT 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 UCC25230DRMT meets industry standards.
7.What is the process for return or replacement of UCC25230DRMT?
All UCC25230DRMT units undergo pre-shipment inspection (PSI). If there is an issue with UCC25230DRMT, 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 UCC25230DRMT part is unused and in its original packaging.
Return procedure for UCC25230DRMT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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