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Texas Instruments UCC2583DTR
- Part No.:
- UCC2583DTR
- Manufacturer:
- Texas Instruments
- Category:
- Power Supply Controllers, Monitors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UCC2583DTR.pdf
- Description:
- IC SECONDARY SIDE CTRLR 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,502
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Product details
Overview
UCC2583DTR from Texas Instruments is a secondary-side post-regulator IC for precision auxiliary output regulation in multiple-output flyback and forward converters. It implements leading-edge PWM modulation, delivers 0.5A sink / 1.5A source gate drive, supports >500kHz operation, and operates over –40°C to +85°C ambient temperature in SOIC-14 package.
For engineers reviewing the UCC2583DTR datasheet, UCC2583DTR pinout, UCC2583DTR application, or UCC2583DTR equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative options, and supply-chain support details specific to UCC2583DTR.
Technical Context
The UCC2583DTR uses a synchronizable leading-edge PWM architecture where the gate output turns on when the internal ramp voltage exceeds the control voltage (from COMP or CAO), and terminates upon synchronization pulse arrival or ramp threshold crossing. Its ramp generator is slaved to the transformer secondary power pulse, enabling stable regulation without magnetic amplifiers.
It integrates dual error amplifiers - a voltage amplifier (with 2.5V reference input, 70–90dB open-loop gain) and an averaging current amplifier - feeding into a shared PWM comparator. The IC requires floating bias referenced to the regulated positive output rail, with COM tied to that rail and PCOM connected to the MOSFET source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Operating Temp Range | –40°C to +85°C - defines industrial-grade thermal qualification for reliable auxiliary regulation in non-automotive power supplies. |
| Max Input Frequency | 500 kHz - sets upper limit for synchronous operation with high-frequency transformer secondary pulses. |
| Gate Drive Strength | 0.5A sink / 1.5A source - enables direct driving of medium-power N-channel MOSFETs without external buffers. |
| Reference Voltage | 5.0 V ±2% - precision internal reference used for feedback divider and ramp programming, reducing external component count. |
| UVLO Thresholds | 9.0 V turn-on / 8.4 V turn-off - ensures clean startup and brownout protection for floating bias supply derived from secondary winding. |
| Ramp High Threshold | 4.0 V typical - determines maximum ramp amplitude before discharge, directly setting minimum off-time and duty cycle resolution. |
| Soft Start Current | 10–25 µA - controls linear ramp-up of duty cycle via external SS-to-REF capacitor, preventing output overshoot during startup. |
Pinout & Package
UCC2583DTR is housed in a 14-pin SOIC (D) package with 1.27 mm pitch, 8.75 mm × 3.91 mm body, and 1.75 mm max height. Pin 1 is located at bottom-left corner (Q1 quadrant) in tape-and-reel orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GATE | Power switch driver output | Delivers high-current gate signal to series MOSFET; 0.5A sink/1.5A source capability eliminates need for discrete drivers. |
| COM | Signal ground reference | Must be connected to regulated positive output rail - establishes floating reference for all internal circuitry including error amps and RAMP. |
| PCOM | Power ground return | Connected to MOSFET source terminal; separates high-di/dt power return from sensitive analog ground (COM). |
| SYNC | Synchronization input | Accepts falling-edge-triggered signal from secondary winding (e.g., S2 node); trips at ~1.0V with ±0.5V hysteresis for noise immunity. |
| RAMP | PWM ramp generator node | Charged via RT–CT network; discharged by sync pulse or internal 4V threshold - sets timing basis for leading-edge modulation. |
| REF | 5V precision reference output | Stable 5V source used for feedback dividers, ramp charging resistor, and SS capacitor - active only when VDD ≥ 9V. |
| VDD | Supply input (clamped) | Operates from 9–14V; internal 14V clamp sinks up to 10mA - requires external RC or zener-based floating bias generation. |
| INV | Voltage error amp inverting input | Receives resistive divider feedback from regulated output; closed-loop stability depends on COMP-to-INV compensation network. |
| COMP | Voltage error amp output | Drives PWM comparator; limited to ±100µA output current - mandates high-impedance compensation components. |
| CAO | Current error amp output | Feeds PWM comparator during overcurrent; integrates sensed current via ILIM–CAO capacitor for accurate average-current limiting. |
| ILIM | Current limit set point | Inverting input of current error amp; voltage here programs foldback current limit proportional to output voltage. |
| CS | Current sense input | Non-inverting input of current error amp; connects to current-sense resistor in return path - enables precise average-current sensing. |
| SS | Soft start control | Internal 10–25µA current discharges external capacitor to REF; voltage here modulates duty cycle during startup. |
Key Features
| Feature | Design Value |
|---|---|
| Leading-edge PWM modulation | Enables stable post-regulation in peak-current-mode primary-controlled systems without phase inversion compensation. |
| Floating bias architecture | Allows direct referencing to positive output rail - simplifies layout and improves EMI by placing filter inductor in return path. |
| Average current limiting loop | Provides noise-immune, foldback-capable overcurrent protection using integrated current error amplifier and CAO integrator. |
| No gate drive transformer required | On-chip 1.5A source/0.5A sink driver drives MOSFET gates directly - reduces BOM count and transformer-related losses. |
| Programmable free-running frequency | RT–CT network sets oscillator frequency (90–110 kHz typ.) for unsynchronized operation or fallback mode. |
Applications
| Telecom Power Supplies | Industrial PLC Power Modules |
|---|---|
Use Scenario: Regulating isolated +3.3V or +5V auxiliary rails in multi-output telecom rectifiers with tight cross-regulation requirements. IC Role / Device Role / Timing Role: Secondary-side post-regulator controlling series MOSFET on auxiliary winding; synchronized to main transformer secondary pulse. Use Value: Achieves ±1% output regulation without magnetic amplifiers, reducing size, cost, and EMI compared to legacy magamp solutions. | Use Scenario: Providing stable +12V and +24V auxiliary outputs in programmable logic controller (PLC) power stages operating in harsh factory environments. IC Role / Device Role / Timing Role: Precision post-regulator IC referenced to positive output rail; uses average-current limiting for robust short-circuit protection. Use Value: Maintains regulation across –40°C to +85°C ambient while supporting foldback current limiting to minimize dissipation during field faults. |
| Medical Imaging Power Systems | Test Equipment DC-DC Modules |
Use Scenario: Tight regulation of low-noise analog supply rails (e.g., +15V/-15V) in MRI or ultrasound subsystems requiring minimal ripple and fast transient response. IC Role / Device Role / Timing Role: Leading-edge PWM controller generating gate drive for synchronous rectifier FETs on auxiliary windings. Use Value: Delivers <1% load regulation and <100 mV line regulation - critical for analog front-end stability in high-resolution imaging circuits. | Use Scenario: Auxiliary output regulation in benchtop power analyzers and automated test equipment requiring long-term calibration stability. IC Role / Device Role / Timing Role: Secondary-side regulator IC with 5.0V ±2% internal reference and low-drift error amplifiers for precision feedback. Use Value: Enables <±0.5% output accuracy over temperature and line - meeting metrology-grade DC-DC performance requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar secondary-side post-regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC3583DTR | Rated for 0°C to +70°C; identical pinout, function, and electrical specs except wider temp range for UCC2583DTR. | Targeted at commercial-grade designs; lacks extended industrial temperature qualification. | Select UCC3583DTR only if ambient stays within 0–70°C and cost sensitivity outweighs thermal margin needs. |
| UCC1583DTR | Rated for –55°C to +125°C; same SOIC-14 package and functional block diagram but higher-grade process and screening. | Intended for military/aerospace or extreme-environment industrial use; higher cost and longer lead times. | Choose UCC1583DTR when operation below –40°C or above +85°C is required - otherwise UCC2583DTR offers optimal cost/performance balance. |
Compared with UCC3583DTR and UCC1583DTR, the UCC2583DTR provides the best trade-off of industrial temperature range (–40°C to +85°C), production availability, and cost for mainstream power supply designs - avoiding unnecessary over-specification while ensuring robustness beyond commercial-grade limits.
Availability
UCC2583DTR is available at Aetrix Electronics and suitable for telecom rectifiers, industrial PLC power modules, medical imaging subsystems, and test equipment DC-DC modules requiring stable component supply with full traceability and lifecycle management.
Supply support for UCC2583DTR 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 over 50 years of power IC innovation.
The UCC2583DTR belongs to TI's UCCx583 family of secondary-side post-regulators, designed specifically to replace magnetic amplifiers in multi-output AC/DC and isolated DC/DC converters with compact, efficient, and thermally robust IC-based regulation.
FAQ
What is the operating temperature range for UCC2583DTR?
The UCC2583DTR is specified for operation from –40°C to +85°C ambient temperature. This industrial-grade rating makes it suitable for deployment in demanding environments such as factory automation, telecom infrastructure, and medical equipment where thermal stability is critical. The device's electrical characteristics - including reference voltage, error amplifier gain, and UVLO thresholds - are guaranteed across this full range per the SLUS299B datasheet.
Does UCC2583DTR require a gate drive transformer?
No, the UCC2583DTR does not require a gate drive transformer. Its integrated gate driver delivers 1.5A source and 0.5A sink current directly to the MOSFET gate, enabling efficient switching of medium-power FETs in secondary-side post-regulator configurations. This eliminates transformer-related losses, leakage inductance issues, and board space typically consumed by discrete isolation components - a key advantage over legacy magnetic amplifier solutions.
How is synchronization implemented in UCC2583DTR?
Synchronization in the UCC2583DTR is achieved via the SYNC pin, which accepts a falling-edge-triggered signal derived from the transformer secondary winding (e.g., S2 node). The internal comparator trips at ~1.0V with ±0.5V hysteresis, ensuring noise immunity. Upon detection, the internal ramp is discharged and timing resets - locking the PWM to the secondary power pulse. This method preserves maximum duty cycle and avoids instability in peak-current-mode primary controllers.
What is the purpose of the COM and PCOM pins on UCC2583DTR?
The COM pin serves as the signal ground reference for all analog circuitry (error amplifiers, comparators, reference), and must be connected to the positive terminal of the regulated output. The PCOM pin is the power ground return for the gate driver and high-current paths, and connects directly to the MOSFET source. Separating COM and PCOM prevents noise coupling from power switching into sensitive analog nodes - a critical layout requirement for stable regulation in the UCC2583DTR.
Can UCC2583DTR operate without an external synchronization signal?
Yes, the UCC2583DTR can operate in free-running mode using its internal oscillator. An external RT resistor (between REF and RAMP) and CT capacitor (between RAMP and COM) set the frequency to 90–110 kHz typical. However, synchronized operation is preferred for multi-output converters to maintain cross-regulation and avoid beat frequencies. In free-run mode, the UCC2583DTR still delivers full functionality - including leading-edge PWM, average current limiting, and soft start - making it usable in simpler or lower-cost designs.
UCC2583DTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Programmable:
- Not Verified
- Applications:
- Secondary-Side Controller
- Voltage - Input:
- -
- Voltage - Supply:
- 8.9V ~ 14V
- Current - Supply:
- 3 mA
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
UCC2583DTR FAQ
1.How can I place an order for UCC2583DTR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC2583DTR 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 UCC2583DTR reliable?
The price and inventory of UCC2583DTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC2583DTR is usually 5 days.
3.What payment methods are accepted for UCC2583DTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC2583DTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC2583DTR?
UCC2583DTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC2583DTR 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 UCC2583DTR?
For technical support, including UCC2583DTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC2583DTR requirements.
6.How does Aetrix verify that UCC2583DTR is sourced from the original manufacturer or authorized distributors?
All UCC2583DTR 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 UCC2583DTR meets industry standards.
7.What is the process for return or replacement of UCC2583DTR?
All UCC2583DTR units undergo pre-shipment inspection (PSI). If there is an issue with UCC2583DTR, 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 UCC2583DTR part is unused and in its original packaging.
Return procedure for UCC2583DTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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