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Texas Instruments UCC28510N
- Part No.:
- UCC28510N
- Manufacturer:
- Texas Instruments
- Category:
- PFC (Power Factor Correction)
- Package:
- 20-DIP (0.300", 7.62mm)
- Datasheet:
-
UCC28510N.pdf
- Description:
- IC PFC CTR AV CURR 200KHZ 20DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,682
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Product details
Overview
UCC28510N from Texas Instruments is a dual-stage combination controller integrating average-current-mode PFC and peak-current-mode PWM control in a single 20-pin PDIP package. It delivers 2-A source / 3-A sink gate drive for both stages, supports 1:1 PFC:PWM frequency ratio, features 16-ns rise/7-ns fall times into 1-nF loads, and enables IEC 61000-3-2 compliant AC-DC power supplies up to 300 W.
For engineers reviewing the UCC28510N datasheet, UCC28510N pinout, UCC28510N application, or UCC28510N equivalent, key selection considerations include its leading-edge PFC + trailing-edge PWM modulation scheme for boost capacitor ripple reduction, programmable maximum duty cycle clamp (70–80%), and dual UVLO thresholds (16 V turn-on / 9.7 V turn-off) enabling robust startup sequencing in offline SMPS designs.
Technical Context
The UCC28510N implements a three-input analog multiplier with input voltage feedforward (VFF) and transconductance voltage amplifier (VAOUT) to generate precise line-current reference in continuous conduction mode (CCM). Its PFC stage uses average-current-mode control with zero-power detect (0.33 V VAOUT threshold) and accurate power limiting via PKLMT pin.
The PWM stage operates synchronously at the same frequency as PFC (1:1 ratio), employs peak-current-mode control with slope compensation via CT_BUFF ramp, and includes programmable soft-start (SS2), 1.3–1.65 V current-sense offset, and independent UVLO2 (6.3 V turn-on / 5.3 V turn-off) with 1.45 V hysteresis for hold-up time management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PFC:PWM Frequency Ratio | 1:1 - Ensures synchronized switching with fixed phase relationship for minimized boost capacitor ripple current. |
| Gate Drive Strength | 2-A source / 3-A sink per output - Directly drives MOSFET gates without external buffers in ≤300-W designs. |
| UVLO Thresholds | VCC turn-on = 16 V, turn-off = 9.7 V - Provides 6.3-V hysteresis for reliable brown-out immunity during AC line dips. |
| Max Duty Cycle Clamp | 70–80% at GT2 - Programmable via D_MAX pin voltage to prevent transformer saturation in flyback/forward topologies. |
| Reference Voltage | 7.5 V ±15 mV over temperature - Powers internal circuitry and external resistor dividers with <5 mV load regulation. |
| Rise/Fall Time | 16 ns / 7 ns into 1-nF load - Enables fast switching transitions while maintaining noise margin in high-frequency PFC stages. |
| Operating Temp Range | −40°C to +105°C - Qualified for industrial and commercial offline power supply environments. |
Pinout & Package
UCC28510N is housed in a 20-pin plastic dual in-line package (PDIP-N) with 0.3-inch body width and through-hole mounting. Thermal performance supports 1 W power dissipation at TJ ≤ 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GT1 (12) | PFC gate driver output | 2-A source / 3-A sink totem pole drives boost MOSFET; disabled outside UVLO window. |
| GT2 (10) | PWM gate driver output | Identical drive strength to GT1; PWM stage suppressed until PFC output reaches 90% of target. |
| VSENSE (3) | PFC voltage error amplifier inverting input | Feedback node for PFC output regulation; also connects to OVP, ENABLE, and UVLO2 comparators. |
| VAOUT (1) | PFC transconductance amplifier output | Regulates PFC output voltage; sinks/source up to 3.3 mA during slew enhancement; drops below 0.33 V to disable PFC. |
| IAC (18) | Multiplier current input | Accepts rectified line voltage-derived current (≤500 µA); enables input voltage feedforward for near-unity PF. |
| VFF (19) | Voltage feedforward output | Sources IAC/2 current; external RC filter sets feedforward gain to maintain constant power across line range. |
| RT (2) | Oscillator programming input | Resistor-to-GND sets CT_BUFF frequency (65–600 kHz); determines both PFC and PWM switching frequencies. |
| SS2 (13) | PWM soft-start timing input | Capacitor-to-GND programs controlled PWM ramp-up; internal 10.5-µA current charges SS2 to 3 V for tSS = 3×CSS2/10.5 µA. |
Key Features
| Feature | Design Value |
|---|---|
| Leading-edge PFC + trailing-edge PWM modulation | Reduces boost capacitor ripple current by >30% vs. TEM/TEM schemes, lowering ESR/size requirements. |
| Average-current-mode PFC control | Enables stable CCM operation across universal AC input (85–265 VAC) with low THD and near-unity power factor. |
| Programmable PWM maximum duty cycle | 70–80% clamp prevents transformer core saturation in flyback and two-transistor forward converters. |
| Zero-power detect circuit | Disables PFC gate drive when VAOUT falls below 0.33 V, eliminating no-load consumption in standby mode. |
| Independent PWM UVLO2 with selectable hysteresis | Allows PWM to remain active during PFC output decay down to 5.3 V (UCC28510), extending hold-up time. |
Applications
| Industrial AC-DC Power Supplies | Medical Equipment Power Modules |
|---|---|
|
Use Scenario: 200–300 W offline power supply for PLC controllers and motor drives operating from 85–265 VAC input. IC Role / Device Role / Timing Role: Dual-stage controller managing boost PFC pre-regulator and isolated flyback PWM stage with synchronized LEM/TEM timing. Use Value: Meets IEC 61000-3-2 Class D harmonic limits while reducing boost capacitor RMS current by 35%, enabling smaller 105°C-rated bulk capacitors. |
Use Scenario: Safety-critical auxiliary power supply in diagnostic imaging systems requiring low standby loss and high reliability. IC Role / Device Role / Timing Role: Primary controller enforcing strict PFC regulation and isolated PWM feedback via optocoupler-connected VERR pin. Use Value: Zero-power detect (0.33 V VAOUT threshold) reduces no-load input power to <150 mW, supporting Energy Star Level VI compliance. |
| Telecom Rectifier Units | LED Driver Power Stages |
|
Use Scenario: 48 V/10 A telecom rectifier with wide input range and hold-up time extension during grid interruptions. IC Role / Device Role / Timing Role: Sequenced PFC+PWM controller with UVLO2 hysteresis (1.45 V) enabling extended PWM operation until PFC output decays to 5.3 V. Use Value: 5.3 V UVLO2 turn-off threshold extends hold-up time by 8–12 ms versus standard 3.55 V variants, improving system ride-through capability. |
Use Scenario: High-efficiency constant-current LED driver for street lighting with universal AC input and dimming interface. IC Role / Device Role / Timing Role: PFC controller regulating boost stage output to 400 VDC, feeding downstream buck converter with analog dimming control on VERR. Use Value: Programmable D_MAX pin allows precise 75% max duty cycle setting to avoid LED current overshoot during 0–10 V dimming transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar combination PFC/PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28511N | Lower UVLO turn-on (10.2 V) and reduced hysteresis (0.5 V) - suited for low-voltage DC-bus start-up. | Used where main DC bus may dip below 12 V during cold-start; less robust against AC brownouts than UCC28510N. | Select UCC28511N only if primary supply has regulated 12 V bias rail; otherwise UCC28510N provides superior line-dip immunity. |
| UCC28070N | Dedicated CCM PFC controller (no integrated PWM); higher integration density and improved THD performance. | Requires separate PWM IC (e.g., UCC28C4x) - increases BOM count but improves design flexibility and thermal partitioning. | Choose UCC28070N + discrete PWM when optimizing for <5% THD or >95% efficiency; UCC28510N remains optimal for cost-sensitive, space-constrained 300-W designs. |
Compared with UCC28511N, UCC28510N offers superior AC line dropout resilience due to its 16 V/9.7 V UVLO window, while UCC28070N trades integration for higher PFC precision and scalability-making UCC28510N the balanced choice for compact, IEC-compliant offline SMPS where board area and component count are critical.
Availability
UCC28510N is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, medical equipment power modules, and telecom rectifier units requiring stable component supply and long-term lifecycle support.
Supply support for UCC28510N 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 UCC28510N belongs to TI's legacy combination PFC/PWM controller product line, engineered specifically for cost-optimized, IEC 61000-3-2-compliant offline power conversion in industrial and commercial equipment.
FAQ
What is the primary function of the UCC28510N in a power supply design?
The UCC28510N integrates both power factor correction (PFC) and pulse-width modulation (PWM) control functions into a single IC. It manages a boost PFC pre-regulator using average-current-mode control and an isolated PWM stage using peak-current-mode control, enabling compact, IEC 61000-3-2-compliant AC-DC power supplies. The UCC28510N coordinates timing between stages to minimize boost capacitor ripple and ensures reliable startup sequencing.
How does the UCC28510N implement zero-power detection?
The UCC28510N monitors the VAOUT pin voltage to detect zero-power conditions. When VAOUT falls below 0.33 V (with 40–140 mV hysteresis), the internal zero-power comparator disables the GT1 gate driver, turning off the PFC stage. This feature reduces no-load input power consumption significantly. The UCC28510N uses this mechanism to enter low-power standby mode automatically without external circuitry.
Can the UCC28510N be used with a 2:1 PFC:PWM frequency ratio?
No, the UCC28510N is specifically configured for a 1:1 PFC:PWM frequency ratio, as confirmed in the "Available Options" table and electrical characteristics section. Devices with 2:1 ratio (e.g., UCC28514N) use different internal oscillator routing. Attempting to force 2:1 operation on the UCC28510N will result in incorrect PWM timing and potential instability. Select UCC28514N or UCC28515N for 2× PWM frequency applications.
What is the purpose of the CT_BUFF pin on the UCC28510N?
The CT_BUFF pin on the UCC28510N provides a buffered version of the internal PWM oscillator ramp signal (4-V amplitude, 200-kHz typical). It is designed to drive an external resistor connected to ISENSE2 for slope compensation in peak-current-mode PWM control. This eliminates the need for an external ramp generator and simplifies noise-immune current-loop design. The UCC28510N's CT_BUFF output can sink/source up to 500 µA reliably.
How is the maximum duty cycle programmed on the UCC28510N?
The maximum duty cycle at GT2 is programmed via the D_MAX pin (Pin 4) using a precision resistor divider referenced to VREF (7.5 V). A linear relationship exists between applied voltage (0.09–0.90 × VREF) and duty ratio (70–80%). For example, 4.15 V at D_MAX yields ~75% clamp. The UCC28510N datasheet provides the formula DMAX ≈ VDX/4 V for estimation. Voltages below 0.7 V disable GT2 output entirely.
UCC28510N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 20-PDIP
UCC28510N FAQ
1.How can I place an order for UCC28510N through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28510N 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 UCC28510N reliable?
The price and inventory of UCC28510N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28510N is usually 5 days.
3.What payment methods are accepted for UCC28510N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28510N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28510N?
UCC28510N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28510N 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 UCC28510N?
For technical support, including UCC28510N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28510N requirements.
6.How does Aetrix verify that UCC28510N is sourced from the original manufacturer or authorized distributors?
All UCC28510N 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 UCC28510N meets industry standards.
7.What is the process for return or replacement of UCC28510N?
All UCC28510N units undergo pre-shipment inspection (PSI). If there is an issue with UCC28510N, 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 UCC28510N part is unused and in its original packaging.
Return procedure for UCC28510N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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