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Texas Instruments UCC28513DW
- Part No.:
- UCC28513DW
- Manufacturer:
- Texas Instruments
- Category:
- PFC (Power Factor Correction)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC28513DW.pdf
- Description:
- IC PFC CTR AVERAGE 200KHZ 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:247
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Product details
Overview
UCC28513DW from Texas Instruments is a dual-stage combination controller integrating average-current-mode PFC and peak-current-mode PWM control in a single SOIC-20 IC. It delivers 2-A source / 3-A sink gate drive for both stages, supports 1:1 PFC:PWM frequency ratio, features 10.2-V UVLO turn-on threshold with 0.5-V hysteresis, and enables high-efficiency AC/DC power supplies compliant with IEC 61000-3-2 harmonic standards.
For engineers reviewing the UCC28513DW datasheet, UCC28513DW pinout, UCC28513DW application, or UCC28513DW equivalent, key selection criteria include its dual-modulation architecture (leading-edge PFC + trailing-edge PWM), programmable PWM maximum duty cycle via D_MAX pin, zero-power detect functionality, and precise 7.5-V internal reference for stable voltage loop control.
Technical Context
The UCC28513DW implements a tightly synchronized dual-loop architecture: its PFC section uses average-current-mode control with input voltage feedforward and a highly linear three-input multiplier to generate low-distortion line current references, while the PWM stage employs peak-current-mode control with slope compensation support via CT_BUFF and programmable soft-start via SS2 capacitor.
It enforces strict sequencing-PWM remains suppressed until PFC output reaches 90% of regulation, and continues operating during brownout until PFC output drops to 47%-ensuring robust startup and hold-up behavior. The device integrates two independent gate drivers (GT1/GT2), transconductance voltage amplifier (VAOUT), current amplifier (CAOUT), and dedicated comparators for OVP, enable, and zero-power detection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PFC:PWM Frequency Ratio | 1:1 - Enables synchronous operation at identical switching frequencies, simplifying EMI filter design and reducing boost capacitor ripple current. |
| VCC UVLO Turn-On Threshold | 10.2 V - Ensures reliable startup after bulk capacitor charging; hysteresis of 0.5 V prevents oscillation near threshold. |
| PWM UVLO2 Turn-Off Threshold | 3.55 V - Maintains PWM operation deeper into line dropout than higher-threshold variants (e.g., UCC28510), extending hold-up time. |
| Gate Drive Strength | 2-A source / 3-A sink per output - Directly drives medium-power MOSFETs without external buffers, minimizing propagation delay and layout complexity. |
| Reference Voltage | 7.5 V ±15 mV - High-accuracy, temperature-stable reference powering internal amplifiers and enabling precise feedback scaling. |
| Zero-Power Detect Threshold | 0.33 V on VAOUT - Disables PFC gate drive when output power falls below usable level, eliminating no-load consumption. |
| Maximum Duty Cycle Clamp | 75% typical at D_MAX = 4.15 V - Prevents transformer saturation in flyback/forward topologies by limiting PWM conduction window. |
Pinout & Package
UCC28513DW is housed in a 20-pin SOIC (DW) package with 0.65-mm pitch, optimized for surface-mount assembly and thermal performance up to 105°C ambient. Pin functions are electrically isolated between analog signal (GND) and power return (PWRGND) paths to minimize noise coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GT1 (12) | PFC Gate Driver Output | 2-A source / 3-A sink totem-pole driver for boost switch; disabled outside UVLO and before VREF stabilization. |
| GT2 (10) | PWM Gate Driver Output | Identical drive capability to GT1; enabled only after PFC output reaches 90% of target and UVLO2 is active. |
| VSENSE (3) | PFC Voltage Feedback Input | Inverting input of transconductance amplifier; also feeds OVP, ENABLE, and UVLO2 comparators for integrated protection. |
| VAOUT (1) | PFC Voltage Amplifier Output | Transconductance output regulating PFC output voltage; slew-enhanced to sink/source 3.3 mA during transients. |
| IAC (18) | Line Voltage Sensing Input | Current input proportional to rectified AC line; max 500 µA ensures accurate feedforward across universal input range. |
| VFF (19) | Voltage Feedforward Output | Current mirror output (IAC/2) feeding external RC filter; sets multiplier gain scaling to maintain unity power factor. |
| CAOUT (15) | PFC Current Amplifier Output | Wide-bandwidth amplifier output driving PFC comparator; connected internally to MOUT for current loop compensation. |
| SS2 (13) | PWM Soft-Start Control | Capacitor-programmable ramp input; internal 10.5-µA current charges external cap to 3 V for controlled PWM enable timing. |
| D_MAX (4) | PWM Duty Cycle Limit | Analog input setting maximum GT2 duty cycle (70–80%); linear relationship allows precise clamp tuning for topology safety. |
| VREF (20) | Precision Reference Output | 7.5-V ±15 mV reference sourcing >10 mA; bypassed externally to stabilize all internal bias and error amplifiers. |
Key Features
| Feature | Design Value |
|---|---|
| Leading-edge PFC + trailing-edge PWM modulation | Reduces boost capacitor RMS ripple current by >30% vs. TEM/TEM schemes, lowering capacitor size, cost, and thermal stress. |
| Programmable PWM maximum duty cycle | Configurable clamp (70–80%) via D_MAX pin enables safe operation in two-transistor forward and flyback converters. |
| Zero-power detect with hysteresis | Shuts down PFC stage when VAOUT falls below 0.33 V (±90 mV hysteresis), eliminating standby power loss without external circuitry. |
| Integrated transconductance voltage amplifier | gM = 100 µS with 60 dB open-loop gain enables fast load transient response and stable Type II/III compensation networks. |
| Dual UVLO with selectable thresholds | Independent VCC UVLO (10.2 V / 0.5 V hysteresis) and PWM UVLO2 (3.55 V off-threshold) support extended hold-up in brownout conditions. |
Applications
| Server Power Supply | Industrial AC/DC Adapter |
|---|---|
|
Use Scenario: 500-W redundant AC/DC front-end with boost PFC followed by LLC resonant PWM stage. IC Role / Device Role / Timing Role: UCC28513DW provides synchronized PFC and PWM control with 1:1 frequency ratio, enabling shared clock tree and reduced EMI filter complexity. Use Value: Leading-edge PFC modulation minimizes boost capacitor ripple, allowing smaller 105°C-rated electrolytics and improving system lifetime under continuous load. |
Use Scenario: 200-W DIN-rail mounted industrial power supply with universal input (85–265 VAC) and 24-V regulated output. IC Role / Device Role / Timing Role: UCC28513DW manages PFC regulation and flyback PWM control with programmable D_MAX clamp to prevent transformer saturation at low line. Use Value: Zero-power detect eliminates no-load consumption below 0.3 W, meeting stringent industrial efficiency standards (e.g., IEC 62301 Class B). |
| Medical Imaging PSU | Telecom Rectifier Module |
|
Use Scenario: 300-W isolated power supply for portable ultrasound equipment requiring low EMI and high reliability. IC Role / Device Role / Timing Role: UCC28513DW implements average-current-mode PFC with input voltage feedforward to maintain >0.99 PF across full line/load range. Use Value: Accurate 7.5-V reference and low-offset current amplifier ensure <±2% output voltage regulation over temperature and aging. |
Use Scenario: 48-V telecom rectifier with hot-swap capability and hold-up time >10 ms during AC interruption. IC Role / Device Role / Timing Role: UCC28513DW's 3.55-V PWM UVLO2 turn-off threshold extends PWM operation until PFC output drops to 47%, maximizing hold-up margin. Use Value: Dual gate drivers eliminate need for discrete buffer stages, reducing BOM count and PCB area while maintaining <15 ns fall time into 1-nF loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PFC+PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28512DW | Higher PWM UVLO2 turn-off threshold (5.30 V) and 6.3-V UVLO hysteresis; same 1:1 frequency ratio. | Better suited for systems requiring earlier PWM shutdown to protect downstream converters during deep brownouts. | Select UCC28512DW when hold-up time requirements are less aggressive and tighter UVLO2 hysteresis improves noise immunity. |
| UCC28070DWR | Dedicated CCM PFC controller (no integrated PWM); 65–300 kHz programmable frequency; no GT2 output or SS2 pin. | Requires separate PWM controller (e.g., UCC28C4x), increasing component count but offering greater flexibility in PWM topology choice. | Choose UCC28070DWR when designing non-standard PWM stages (e.g., phase-shifted full-bridge) or requiring independent PFC/PWM optimization. |
Compared with UCC28513DW, UCC28512DW offers higher PWM shutdown voltage for conservative brownout handling, while UCC28070DWR trades integration for topology flexibility-neither is pin-compatible, but both address overlapping high-efficiency AC/DC design needs with distinct trade-offs in BOM count, layout simplicity, and control granularity.
Availability
UCC28513DW is available at Aetrix Electronics and suitable for server power supplies, industrial AC/DC adapters, and medical imaging PSUs requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for UCC28513DW 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 and embedded processing technologies, with decades of expertise in power management IC design and manufacturing.
The UCC2851x family was engineered specifically for cost-sensitive, high-efficiency AC/DC power conversion systems requiring IEC 61000-3-2 compliance, combining PFC and PWM control to reduce system-level complexity and bill-of-materials cost.
FAQ
What is the primary function of the UCC28513DW in an AC/DC power supply?
The UCC28513DW serves as a dual-stage controller that simultaneously manages power factor correction (PFC) using average-current-mode control and pulse-width modulation (PWM) using peak-current-mode control. It integrates gate drivers, reference, error amplifiers, and protection comparators into one SOIC-20 IC to replace two discrete controllers-reducing board space, component count, and design complexity while ensuring IEC 61000-3-2 compliance. Its 1:1 PFC:PWM frequency ratio and leading-edge/trailing-edge modulation scheme directly lower boost capacitor ripple current.
How does the UCC28513DW handle startup sequencing between PFC and PWM stages?
The UCC28513DW enforces strict hardware-based sequencing: the PWM stage (GT2) remains fully disabled until the PFC output voltage reaches 90% of its regulated value, ensuring stable bus voltage before secondary-side regulation begins. During AC line dropout, the PWM stage continues operating until the PFC output falls to 47% of nominal-providing extended hold-up time compared to variants like UCC28510. This behavior is fixed in silicon and requires no external programming or firmware.
Can the UCC28513DW be used with a flyback PWM topology?
Yes, the UCC28513DW is explicitly validated for flyback PWM topologies. Its programmable D_MAX pin allows precise clamping of GT2 maximum duty cycle (70–80%), preventing transformer saturation at low-line conditions. The SS2 pin supports capacitor-programmed soft-start to limit inrush current, and the 3.55-V PWM UVLO2 turn-off threshold extends operational window during brownout-key advantages for isolated flyback designs requiring robustness and efficiency across universal input ranges.
What is the role of the VFF pin on the UCC28513DW?
The VFF (voltage feedforward) pin on the UCC28513DW sources a current equal to half the IAC input current (IAC/2), which flows through an external RC filter to generate a scaled voltage proportional to the square of the rectified line voltage. This signal linearizes the multiplier's output across the full AC input range, enabling near-unity power factor (>0.99) and consistent current shaping regardless of line voltage-critical for meeting harmonic standards across 85–265 VAC inputs.
Does the UCC28513DW include built-in protection features?
Yes, the UCC28513DW integrates multiple hardware-based protections: PFC overvoltage protection (OVP) triggered at VREF + 0.49 V with 500-mV hysteresis; zero-power detect disabling GT1 when VAOUT falls below 0.33 V; peak current limiting on both PFC (PKLMT pin) and PWM (ISENSE2 pin) stages; and dual UVLO circuits-one for VCC (10.2 V turn-on) and one for PWM enable (3.55 V turn-off). All operate independently of external microcontrollers or software.
UCC28513DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Mode:
- Average Current
- Frequency - Switching:
- 200kHz
- Current - Startup:
- 100 µA
- Voltage - Supply:
- 9.7V ~ 18V
- Operating Temperature:
- -40°C ~ 105°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
UCC28513DW FAQ
1.How can I place an order for UCC28513DW through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28513DW 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 UCC28513DW reliable?
The price and inventory of UCC28513DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28513DW is usually 5 days.
3.What payment methods are accepted for UCC28513DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28513DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28513DW?
UCC28513DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28513DW 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 UCC28513DW?
For technical support, including UCC28513DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28513DW requirements.
6.How does Aetrix verify that UCC28513DW is sourced from the original manufacturer or authorized distributors?
All UCC28513DW 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 UCC28513DW meets industry standards.
7.What is the process for return or replacement of UCC28513DW?
All UCC28513DW units undergo pre-shipment inspection (PSI). If there is an issue with UCC28513DW, 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 UCC28513DW part is unused and in its original packaging.
Return procedure for UCC28513DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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