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Texas Instruments UCC28510DW
- Part No.:
- UCC28510DW
- Manufacturer:
- Texas Instruments
- Category:
- PFC (Power Factor Correction)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC28510DW.pdf
- Description:
- IC PFC CTR AVERAGE 200KHZ 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,214
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Product details
Overview
UCC28510DW 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 (DW) 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 UCC28510DW datasheet, UCC28510DW pinout, UCC28510DW application, or UCC28510DW equivalent, key selection criteria include its leading-edge PFC + trailing-edge PWM modulation scheme, programmable maximum duty cycle (70–80%), UVLO turn-on at 16 V with 6.3-V hysteresis, and integrated zero-power detect for standby efficiency optimization.
Technical Context
The UCC28510DW implements a three-input analog multiplier with input voltage feedforward (VFF) and transconductance voltage amplifier (VAOUT) to generate precise line-current references for continuous conduction mode (CCM) boost PFC. Its PFC section includes zero-power detect (0.33-V threshold), accurate power limiting, and 2-A/3-A totem-pole GT1 driver with 5–12 Ω pull-up/pull-down resistance.
The PWM stage uses peak-current-mode control with slope compensation via CT_BUFF ramp injection, programmable soft-start (SS2), 1.3–1.65-V current sense comparator offset, and independent UVLO2 (6.3-V turn-on, 5.3-V turn-off). Oscillator frequency is set by RT resistor (160–240 kHz typical), and both stages share synchronized timing with fixed 1:1 PFC:PWM ratio.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PFC:PWM Frequency Ratio | 1:1 - ensures synchronized switching with minimized boost capacitor ripple current |
| VCC UVLO Turn-On Threshold | 16 V ±0.6 V - enables reliable startup after bulk capacitor charging in offline supplies |
| GT1/GT2 Gate Drive Strength | 2-A source / 3-A sink - directly drives MOSFET gates without external buffers in ≤300-W designs |
| Maximum Duty Cycle Clamp | 70–80% - configurable via D_MAX pin voltage to support flyback/forward topologies |
| Zero-Power Detect Threshold | 0.20–0.50 V on VAOUT - disables PFC stage when output load drops below ~5% of full scale |
| Operating Junction Temperature | −55°C to 150°C - supports industrial and high-ambient applications with SOIC-20 thermal derating |
| Reference Voltage (VREF) | 7.5 V ±15 mV - powers internal circuitry and external bias networks with <10-mV line/load regulation |
Pinout & Package
UCC28510DW is housed in a 20-pin SOIC Wide-body (DW) package with 0.65-mm pitch, rated for −40°C to +105°C operation and 0.7 W power dissipation. Pin layout follows TI's standard DW footprint with GND (Pin 6) and PWRGND (Pin 11) requiring Kelvin separation for noise immunity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GT1 (12) | PFC Gate Driver Output | 2-A source / 3-A sink totem pole driving boost MOSFET; disabled during UVLO |
| GT2 (10) | PWM Gate Driver Output | Identical drive strength to GT1; enabled only after PFC output reaches 90% of target |
| VSENSE (3) | PFC Voltage Feedback Input | Inverting input to transconductance amplifier; also feeds OVP, ENABLE, and UVLO2 comparators |
| VAOUT (1) | PFC Transconductance Amplifier Output | Regulates PFC output voltage; sources/sinks up to 30 µA linearly, 3.3 mA slew-enhanced |
| IAC (18) | Rectified Line Voltage Sensing | Current input proportional to |VAC|; max 500 µA for multiplier linearity and distortion control |
| VFF (19) | Voltage Feedforward Input | Sources IAC/2 current; sets multiplier gain scaling to maintain near-unity PF across line range |
| RT (2) | Oscillator Frequency Programming | Resistor-to-GND sets CT_BUFF ramp frequency (160–240 kHz); no capacitor allowed |
| SS2 (13) | PWM Soft-Start Control | Capacitor-to-GND programs controlled ramp of VERR to limit inrush; discharges fast on fault |
| PKLMT (14) | PFC Peak Current Limit | Voltage input referenced to 0 V; sets overcurrent threshold via resistor divider from VREF |
| GND (6) / PWRGND (11) | Analog & Power Grounds | Must be externally tied with low-inductance trace; separates signal return from gate-drive return paths |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFC+PWM Control | Eliminates inter-stage timing mismatches and reduces BOM count vs. discrete controllers |
| Leading-Edge PFC + Trailing-Edge PWM | Reduces RMS ripple current in boost output capacitor by >30% vs. TEM/TEM schemes |
| Programmable Maximum Duty Cycle | 70–80% clamp via D_MAX pin enables safe operation in two-transistor forward topologies |
| Zero-Power Detect | Turns off PFC stage when VAOUT falls below 0.33 V, cutting standby power to <100 µA |
| Input Voltage Feedforward (VFF) | Maintains constant power delivery and near-unity PF across 85–265 VAC input range |
| High-Current Gate Drivers | 2-A/3-A drivers with 16-ns rise/7-ns fall times reduce external component count and layout area |
Applications
| Server PSU Front-End | Industrial AC-DC Adapter |
|---|---|
|
Use Scenario: 200–300 W telecom/server power supply requiring IEC 61000-3-2 Class A compliance and hold-up time >10 ms. IC Role / Device Role / Timing Role: UCC28510DW controls CCM boost PFC stage followed by isolated flyback PWM, with synchronized LEM/TEM modulation. Use Value: Reduces boost capacitor ripple current by 35%, enabling smaller 470-µF/450-V electrolytic instead of 680-µF, lowering cost and volume. |
Use Scenario: 150-W industrial control power module operating continuously at 60°C ambient with strict EMI limits. IC Role / Device Role / Timing Role: UCC28510DW manages PFC and PWM stages with programmable soft-start (SS2) and UVLO hysteresis for robust brownout recovery. Use Value: Zero-power detect cuts no-load consumption to 0.3 W, meeting Energy Star v2.0 standby requirements without auxiliary circuits. |
| Medical Imaging Power Supply | LED Driver Front-End |
|
Use Scenario: 250-W diagnostic imaging system power supply needing low THD (<5%) and fast load transient response (<50 µs). IC Role / Device Role / Timing Role: UCC28510DW implements average-current-mode PFC with transconductance voltage amplifier (VAOUT) and fast charge/discharge slew enhancement. Use Value: Improved transient response reduces output voltage deviation to ±1.2% under 50–100% step load, avoiding false fault triggers in sensitive analog subsystems. |
Use Scenario: 120-W outdoor LED streetlight driver requiring high reliability, wide input range (90–305 VAC), and surge immunity. IC Role / Device Role / Timing Role: UCC28510DW provides PFC control with accurate power limiting and OVP/enable functions tied to VSENSE for overvoltage protection. Use Value: Programmable power limit (via PKLMT) prevents MOSFET overstress during lightning-induced surges, extending MTBF by 2.1× per Telcordia SR-332. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PFC+PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28511DW | UVLO turn-on at 10.2 V (vs. 16 V), 0.5-V hysteresis (vs. 6.3 V) | Better suited for low-input-voltage systems (e.g., 100–120 VAC only) with tighter brownout margins | Select UCC28511DW if primary input is 100–120 VAC and lower startup voltage is required |
| UCC28070DW | Dedicated CCM PFC controller only (no integrated PWM); 6-A gate drive; 300-kHz max frequency | Requires separate PWM IC (e.g., UCC28C4x), increasing component count but offering higher PFC efficiency at >400 W | Choose UCC28070DW + standalone PWM for >400-W designs where PFC efficiency >96% is critical |
Compared with UCC28511DW, the UCC28510DW offers higher UVLO hysteresis for stable operation in noisy industrial mains; compared with UCC28070DW, it trades PFC-only optimization for system-level integration, reducing PCB area by 35% and eliminating inter-controller timing skew.
Availability
UCC28510DW is available at Aetrix Electronics and suitable for server PSU front-ends, industrial AC-DC adapters, and medical imaging power supplies requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for UCC28510DW 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 over 50 years of power management innovation and ISO 9001-certified manufacturing.
The UCC28510DW belongs to TI's UCC2851x family of combination PFC/PWM controllers, designed specifically for cost-sensitive, space-constrained offline power supplies needing IEC 61000-3-2 compliance and simplified system integration.
FAQ
What is the recommended oscillator resistor value for UCC28510DW to achieve 200-kHz switching?
The UCC28510DW oscillator frequency is set by RT resistor to GND. For 200 kHz at CT_BUFF, TI specifies RT = 156 kΩ (SLUS517C, p.5). This value yields initial accuracy within ±15 kHz and total variation of 160–240 kHz across line/temperature. Use a 1% metal-film resistor and route RT close to GND pin to minimize noise coupling into the oscillator node.
How does the zero-power detect function work in UCC28510DW?
The UCC28510DW monitors VAOUT voltage: when it falls below 0.20–0.50 V (typ. 0.33 V), the internal zero-power comparator disables GT1 gate drive. This occurs when PFC output load drops below ~5% of full scale, reducing no-load consumption to <100 µA. The comparator includes 40–140 mV hysteresis to prevent chatter during light-load transitions.
Can UCC28510DW drive SiC MOSFETs directly in the PFC stage?
UCC28510DW's GT1 driver delivers 2-A source / 3-A sink into 1-nF loads with 16-ns rise time, sufficient for most 650-V SiC MOSFETs with Qg ≤ 35 nC (e.g., C3M0065090D). However, for >1000-V SiC devices or layouts with >10 nH gate loop inductance, external gate resistors (2–5 Ω) and ferrite beads are recommended to damp ringing and ensure clean turn-on/turn-off.
What is the purpose of the CT_BUFF pin in UCC28510DW?
CT_BUFF (Pin 5) provides a buffered 4-V amplitude PWM oscillator ramp signal. It is used to inject slope compensation into ISENSE2 via a series resistor, stabilizing peak-current-mode control in discontinuous conduction mode (DCM) or high-duty-cycle operations. The internal buffer drives up to 500 µA, eliminating need for external op-amp buffering.
How is the maximum duty cycle programmed on UCC28510DW?
UCC28510DW's maximum duty cycle is set by applying a DC voltage to D_MAX (Pin 4). A voltage between 0.09 V and 0.90 V yields linear duty ratio from 0% to 100%; typical design uses a precision divider from VREF (7.5 V) to achieve 70–80% clamp. Voltages <0.7 V force 0% duty cycle, enabling hard disable functionality.
UCC28510DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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
UCC28510DW FAQ
1.How can I place an order for UCC28510DW through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28510DW 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 UCC28510DW reliable?
The price and inventory of UCC28510DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28510DW is usually 5 days.
3.What payment methods are accepted for UCC28510DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28510DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28510DW?
UCC28510DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28510DW 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 UCC28510DW?
For technical support, including UCC28510DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28510DW requirements.
6.How does Aetrix verify that UCC28510DW is sourced from the original manufacturer or authorized distributors?
All UCC28510DW 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 UCC28510DW meets industry standards.
7.What is the process for return or replacement of UCC28510DW?
All UCC28510DW units undergo pre-shipment inspection (PSI). If there is an issue with UCC28510DW, 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 UCC28510DW part is unused and in its original packaging.
Return procedure for UCC28510DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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