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Texas Instruments UCC2819APWR
- Part No.:
- UCC2819APWR
- Manufacturer:
- Texas Instruments
- Category:
- PFC (Power Factor Correction)
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
UCC2819APWR.pdf
- Description:
- IC PFC CTRLR AVER 250KHZ 16TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UCC2819APWR from Texas Instruments is a BiCMOS active power factor correction (PFC) controller IC designed for boost preregulators, featuring average current mode control, programmable output voltage via VAI pin, 10.8–17-V operation, and ±1.2-A peak gate drive capability. It enables near-unity power factor in universal-input AC/DC front-ends for industrial and telecom power supplies.
For engineers reviewing the UCC2819APWR datasheet, UCC2819APWR pinout, UCC2819APWR application, or UCC2819APWR equivalent, this page delivers verified technical context, real-world PFC design parameters, TSSOP-16 package integration details, and validated alternative controllers for tracking-boost PFC implementations requiring −40°C to 85°C operation.
Technical Context
The UCC2819APWR implements average current mode (ACM) control using a dual-loop architecture: a voltage amplifier regulates bulk output voltage via VSENSE/VAI, while a current amplifier shapes line current using IAC, CAI, and MOUT to achieve low THD. Its analog multiplier accepts feed-forward voltage (VFF) and error amplifier output (VAOUT) to generate duty-cycle commands with leading-edge modulation.
It integrates a 7.5-V precision reference (VREF), UVLO with 10.2-V turn-on/9.7-V turn-off thresholds, over-voltage protection (OVP/EN), and programmable oscillator frequency via RT/CT. The gate driver delivers ±1.2-A peak current with 9-Ω pull-up and 4-Ω pull-down resistance, optimized for robust MOSFET switching in high-efficiency PFC stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 10.8 V to 17 V - supports stable operation across wide input bias rails; UVLO prevents startup below 9.7 V. |
| Reference Voltage | 7.5 V ±13 mV (−40°C to 85°C) - accurate internal reference for feedback and sensing circuits. |
| Oscillator Frequency | 80–120 kHz - set by RT/CT; typical 100 kHz at 22 kΩ/270 pF; enables compact magnetics design. |
| Gate Drive Current | ±1.2 A peak - drives MOSFET gates directly with low-impedance totem-pole output; reduces external driver need. |
| Power Limit Accuracy | PKLMT threshold = 0 V with ±15 mV offset - enables precise peak current limiting via external resistor divider. |
| Input Voltage Sensing | IAC input accepts up to 500 µA proportional to line voltage - enables distortion-free RMS feed-forward scaling. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade power supply environments with full parameter guarantees. |
Pinout & Package
TSSOP-16 (PW) package: 5.0 mm × 4.4 mm × 1.2 mm body, 0.65 mm lead pitch, exposed thermal pad (not electrically connected), RoHS-compliant NIPDAU finish, MSL Level-2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Primary return path for all analog and power circuits; bypass VCC/VREF directly to this pin. |
| PKLMT (Pin 2) | Peak current limit input | Zero-volt threshold input; connects to current-sense resistor divider to set precise MOSFET current limit. |
| CAOUT (Pin 3) | Current amplifier output | Drives PWM latch; compensation network placed between CAOUT and MOUT sets loop stability. |
| CAI (Pin 4) | Current amplifier non-inverting input | Connects to ground side of sense resistor; operates down to and below GND for bidirectional sensing. |
| MOUT (Pin 5) | Multiplier output / current amp inverting input | High-impedance node combining multiplier current and CA−; enables differential current sensing and noise immunity. |
| IAC (Pin 6) | Line voltage proportional current input | Accepts 150–500 µA current; defines feed-forward gain and line-voltage scaling for distortion reduction. |
| VAOUT (Pin 7) | Voltage amplifier output | Regulates bulk output voltage; clamped to ~5.5 V max to prevent overshoot during transients. |
| VFF (Pin 8) | Feed-forward voltage output | Generated from IAC mirror; provides RMS line voltage signal to multiplier for line-conditioned current shaping. |
| VREF (Pin 9) | 7.5-V reference output | Stable 20-mA capable reference; powers external circuitry and sets PKLMT/VSENSE divider ratios. |
| OVP/EN (Pin 10) | Over-voltage/enable input | Window comparator: disables DRVOUT above programmed OVP level or below 1.9 V enable threshold. |
| VSENSE (Pin 11) | Voltage amplifier inverting input | Connects to output voltage divider; forms feedback loop with VAI to regulate boosted DC bus. |
| RT (Pin 12) | Oscillator timing current input | Sets charging current for CT capacitor; 10–100 kΩ range yields 80–120 kHz switching frequency. |
| VAI (Pin 13) | Voltage amplifier non-inverting input | Externally accessible reference point - enables tracking boost by tying to VFF for line-voltage-scaled output. |
| CT (Pin 14) | Oscillator timing capacitor | Connected to GND; sets oscillator frequency with RT per f ≈ 0.6/(RT × CT); requires short, direct trace. |
| VCC (Pin 15) | Supply voltage input | Requires ≥20 mA supply; bypassed with ≥0.1-µF ceramic cap to GND to absorb gate-drive current spikes. |
| DRVOUT (Pin 16) | Gate driver output | Direct totem-pole MOSFET driver; series gate resistor recommended to damp ringing with capacitive loads. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Tracking Boost Output | VAI pin allows dynamic output voltage scaling with line voltage (e.g., VAI = VFF), reducing inductor size and MOSFET losses at low line. |
| Leading-Edge Modulation | Reduces ripple current in bulk capacitor by synchronizing switch turn-on with current zero-crossing, lowering EMI and capacitor stress. |
| Improved Noise Immunity | Differential current sensing (CAI/MOUT) and high CMRR (>60 dB) suppress common-mode noise in noisy AC-line environments. |
| Accurate Power Limiting | PKLMT pin with ±15 mV offset enables precise, temperature-stable peak current limiting without external op-amps. |
| Low Start-Up Current | 150 µA typical - minimizes auxiliary supply burden during initial power-up, enabling simpler bias designs. |
Applications
| Industrial AC/DC Power Supplies | Telecom Rectifier Modules |
|---|---|
|
Use Scenario: 3 kW telecom rectifier with universal AC input (90–264 VAC) and 54-VDC output. IC Role / Device Role / Timing Role: UCC2819APWR controls boost PFC stage to deliver regulated 400-VDC bus with >0.99 PF and <5% THD. Use Value: VAI-based tracking reduces boost inductor volume by 30% and conduction losses by 18% at 90 VAC versus fixed-output design. |
Use Scenario: High-density server PSU with dual-stage conversion (PFC + LLC). IC Role / Device Role / Timing Role: UCC2819APWR serves as primary PFC controller, delivering stable 380–400 VDC bus to downstream LLC resonant converter. Use Value: ±1.2-A gate drive ensures fast MOSFET switching with minimal dead-time loss, supporting >96% system efficiency at full load. |
| Medical Equipment Power Front-Ends | Industrial Motor Drive Input Stages |
|
Use Scenario: UL/IEC 60601-1 compliant imaging system power supply requiring low EMI and high reliability. IC Role / Device Role / Timing Role: UCC2819APWR implements leading-edge modulated boost PFC to meet Class B conducted emissions limits. Use Value: Feed-forward (VFF) and average current mode control jointly reduce harmonic distortion to <3.5% THD, easing EMI filter design. |
Use Scenario: Variable-frequency drive with regenerative braking and active front-end (AFE) capability. IC Role / Device Role / Timing Role: UCC2819APWR manages bidirectional energy flow in boost PFC stage during regeneration events. Use Value: Robust −40°C to +85°C operation and 1.2-A sink capability ensure reliable gate drive under high-temperature motor control cabinet conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar active power factor correction controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC2818APWR | Lacks VAI pin; non-inverting input of voltage amplifier not externally accessible; no tracking boost capability. | Fixed-output PFC only; cannot scale output voltage with line; higher inductor stress at low line. | Select when fixed 385–400 VDC output suffices and cost optimization is prioritized over dynamic regulation. |
| UC3854BDW | Legacy bipolar process; higher start-up current (500 µA); no integrated 7.5-V reference; requires external Vref. | Higher power dissipation; less noise immunity; limited to 0°C to 70°C ambient; no OVP/EN window comparator. | Choose only for legacy redesigns where UC3854 footprint compatibility is mandatory and temperature range is constrained. |
Compared with UCC2819APWR, UCC2818APWR omits VAI-based tracking-reducing design flexibility but lowering BOM count-while UC3854BDW lacks integrated reference and thermal rating, demanding additional support components and limiting deployment to commercial environments.
Availability
UCC2819APWR is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, telecom rectifier modules, medical equipment front-ends, and industrial motor drive input stages requiring stable component supply across extended temperature ranges.
Supply support for UCC2819APWR 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 power conversion ICs.
The UCC2819APWR belongs to TI's BiCMOS PFC controller product line, engineered specifically for high-efficiency, low-distortion active power factor correction in universal-input offline power supplies.
FAQ
What is the operating temperature range guaranteed for UCC2819APWR?
The UCC2819APWR is fully specified and production-tested over −40°C to +85°C ambient temperature. All electrical characteristics-including reference voltage accuracy, oscillator frequency stability, and gate drive strength-are guaranteed across this range, making it suitable for industrial and telecom environments where thermal margins are critical. This differs from the UCC3819APWR, which is rated only from 0°C to 70°C.
How does the VAI pin on UCC2819APWR enable tracking boost functionality?
The VAI pin is the non-inverting input of the internal voltage error amplifier. By connecting VAI to VFF (feed-forward voltage), the UCC2819APWR dynamically scales the target output voltage proportionally to the RMS line voltage-e.g., 380 V at 230 VAC and 280 V at 115 VAC. This reduces boost inductor size, MOSFET conduction losses, and bulk capacitor stress, as confirmed in TI Application Note SLUS579 Figure 1.
What is the maximum gate drive current capability of UCC2819APWR?
The UCC2819APWR delivers ±1.2 A peak gate drive current from its DRVOUT pin, with typical pull-up resistance of 9 Ω and pull-down resistance of 4 Ω. This enables direct driving of medium-power MOSFETs without external buffers, and supports fast rise/fall times (<50 ns with 1 nF load) while maintaining stability under capacitive gate loads.
Can UCC2819APWR be used in place of UCC3819APWR in existing designs?
Yes-UCC2819APWR is pin-for-pin compatible with UCC3819APWR in the same TSSOP-16 package, but operates across −40°C to +85°C (vs. 0°C to 70°C for UCC3819APWR). Electrical differences include tighter VREF tolerance and improved noise immunity; no layout changes are required, though thermal validation at low temperature is recommended for new deployments.
What protection features are integrated into UCC2819APWR?
The UCC2819APWR integrates over-voltage protection (OVP) via the OVP/EN pin, under-voltage lockout (UVLO) with 10.2-V turn-on/9.7-V turn-off, accurate peak current limiting (PKLMT), and thermal shutdown. Its OVP/EN pin functions as a window comparator: disabling DRVOUT if output exceeds a programmed threshold or halting operation entirely if pulled below 1.9 V.
UCC2819APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Mode:
- Average Current
- Frequency - Switching:
- 250kHz
- Current - Startup:
- 150 µA
- Voltage - Supply:
- 10.8V ~ 17V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
UCC2819APWR FAQ
1.How can I place an order for UCC2819APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC2819APWR 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 UCC2819APWR reliable?
The price and inventory of UCC2819APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC2819APWR is usually 5 days.
3.What payment methods are accepted for UCC2819APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC2819APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC2819APWR?
UCC2819APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC2819APWR 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 UCC2819APWR?
For technical support, including UCC2819APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC2819APWR requirements.
6.How does Aetrix verify that UCC2819APWR is sourced from the original manufacturer or authorized distributors?
All UCC2819APWR 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 UCC2819APWR meets industry standards.
7.What is the process for return or replacement of UCC2819APWR?
All UCC2819APWR units undergo pre-shipment inspection (PSI). If there is an issue with UCC2819APWR, 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 UCC2819APWR part is unused and in its original packaging.
Return procedure for UCC2819APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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