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Texas Instruments UCC28510DWR
- Part No.:
- UCC28510DWR
- Manufacturer:
- Texas Instruments
- Category:
- PFC (Power Factor Correction)
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
UCC28510DWR.pdf
- Description:
- IC PFC CTR AVERAGE 200KHZ 20SOIC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
UCC28510DWR 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 UCC28510DWR datasheet, UCC28510DWR pinout, UCC28510DWR application, or UCC28510DWR equivalent, key selection criteria include its leading-edge PFC + trailing-edge PWM modulation scheme, programmable maximum duty cycle clamp, zero-power detect, input voltage feedforward implementation, and integrated transconductance voltage amplifier with slew-rate enhancement.
Technical Context
The UCC28510DWR implements a tightly synchronized dual-loop architecture: the PFC stage uses average-current-mode control with a highly linear three-input multiplier, input voltage feedforward (via VFF), and a transconductance voltage amplifier (VAOUT) for fast load transient response; the PWM stage employs peak-current-mode control with slope compensation support via CT_BUFF, programmable soft-start (SS2), and accurate maximum duty cycle clamping via D_MAX.
Its oscillator generates a base switching frequency (typically 200 kHz at CT_BUFF) shared by both stages (1:1 ratio), with UVLO thresholds of 16 V turn-on / 9.7 V turn-off and separate PWM UVLO2 (6.75 V turn-on / 5.3 V turn-off). Sequencing logic ensures PWM activation only after PFC output reaches 90% of regulation and sustains operation until PFC drops to 71% of nominal value.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PFC:PWM Frequency Ratio | 1:1 - PWM stage operates at same frequency as PFC stage, simplifying EMI filter design and enabling direct synchronization without divider logic. |
| Gate Drive Strength | 2-A source / 3-A sink per output (GT1, GT2) - drives MOSFET gates directly without external buffers in ≤300-W designs. |
| UVLO Thresholds | VCC turn-on: 16 V ±0.6 V; turn-off: 9.7 V ±0.6 V - ensures reliable startup under brownout and clean shutdown during line dropout. |
| Reference Voltage | 7.5 V ±15 mV (VREF) - powers internal circuitry and serves as precision bias for resistor dividers (e.g., D_MAX, PKLMT). |
| Max Duty Cycle Clamp | 75% typical (D_MAX = 4.15 V) - prevents transformer saturation in flyback/forward topologies by limiting GT2 on-time. |
| Rise/Fall Time | 16 ns / 7 ns into 1-nF load - minimizes switching losses and supports high-frequency operation with low gate charge MOSFETs. |
| Operating Temp Range | –40°C to +105°C - qualified for industrial and commercial power supply environments without derating. |
Pinout & Package
UCC28510DWR is housed in a 20-pin SOIC Wide-body (DW) package, 7.5 mm × 12.8 mm, with 0.65 mm pitch and exposed thermal pad (not electrically connected). Pin 1 is marked by a beveled corner or dot; pin numbering follows standard SOIC convention (counterclockwise from pin 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GT1 (12) | PFC gate driver output | 2-A source / 3-A sink totem pole driving boost MOSFET; disabled outside UVLO window and before VREF stabilization. |
| GT2 (10) | PWM gate driver output | Identical drive strength to GT1; enabled only after PFC output reaches 90% of regulation and UVLO2 is active. |
| VSENSE (3) | PFC voltage error amplifier inverting input | Feedback node for PFC output voltage regulation; also connects to OVP, ENABLE, and UVLO2 comparators. |
| VAOUT (1) | PFC transconductance amplifier output | Sources/sinks up to 3.3 mA during slew enhancement; collapses to zero current below 0.33 V to trigger zero-power shutdown. |
| IAC (18) | Multiplier current input | Accepts rectified line voltage-derived current (≤500 µA); feeds analog multiplier for input voltage feedforward. |
| VFF (19) | Voltage feedforward output | Sources IAC/2 current; external RC filter sets feedforward gain to maintain near-unity power factor across line range. |
| RT (2) | Oscillator programming input | Resistor-to-GND sets CT_BUFF frequency (65–600 kHz); no capacitor allowed - noise-sensitive analog node. |
| SS2 (13) | PWM soft-start timing input | Capacitor-to-GND sets PWM ramp time; internal 10.5-µA current charges it to 3 V for controlled GT2 duty-cycle ramp-up. |
| D_MAX (4) | PWM max duty cycle clamp input | DC voltage (0.09–0.90 × VREF) linearly sets GT2 max on-time; <0.7 V forces 0% duty cycle. |
| PKLMT (14) | PFC peak current limit threshold | Voltage input referenced to 0 V; used with resistor divider to set overcurrent trip point across PFC sense resistor. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated PFC+PWM control | Eliminates inter-stage timing mismatches and reduces BOM count by merging two controllers into one die with shared oscillator and sequencing logic. |
| Leading-edge PFC + trailing-edge PWM | Reduces ripple current in PFC bulk capacitor by >30% versus dual trailing-edge schemes, lowering capacitor RMS current and extending lifetime. |
| Transconductance voltage amplifier (VAOUT) | Provides 100 µS typical gM and 60 dB open-loop gain; slew-rate enhancement enables fast recovery from line/load transients without external compensation. |
| Zero-power detect | Monitors VAOUT voltage; asserts shutdown when VAOUT falls below 0.33 V, preventing idle consumption in standby mode. |
| Programmable PWM UVLO2 | Independent 6.75 V turn-on / 5.3 V turn-off threshold ensures PWM remains active during brief PFC dips while avoiding premature restart. |
Applications
| Industrial AC-DC Power Supplies | Medical Equipment Power Modules |
|---|---|
Use Scenario: 200–300 W offline power supply for PLC controllers and motor drives requiring IEC 61000-3-2 Class A compliance. IC Role / Device Role / Timing Role: UCC28510DWR provides synchronized PFC and flyback PWM control with 1:1 frequency ratio and built-in sequencing to meet harmonic limits and ensure stable hold-up time. Use Value: Reduces bulk capacitor stress via LEM/TEM modulation, enabling smaller 450-V electrolytics and lowering system cost by 12% versus discrete controllers. | Use Scenario: Isolated auxiliary power supply in diagnostic imaging systems where low standby power and EMI robustness are critical. IC Role / Device Role / Timing Role: UCC28510DWR manages boost PFC front-end and regulated flyback secondary, using zero-power detect to cut GT1/GT2 drive below 0.33 V VAOUT during standby. Use Value: Achieves <300 mW no-load input power via precise VAOUT-based shutdown, meeting IEC 60601-1 leakage and efficiency requirements. |
| LED Driver Power Stages | Telecom Rectifier Units |
Use Scenario: Constant-voltage LED driver for street lighting with universal AC input (85–265 VAC) and 90%+ efficiency target. IC Role / Device Role / Timing Role: UCC28510DWR executes average-current PFC for unity PF and peak-current PWM for tight CV regulation, leveraging VFF feedforward for line-voltage immunity. Use Value: Maintains <±2% output voltage regulation across full line/load range using VSENSE feedback and programmable D_MAX clamp to prevent overvoltage during dimming transients. | Use Scenario: 48-V telecom rectifier module requiring high reliability, wide temperature operation, and hold-up time >10 ms at full load. IC Role / Device Role / Timing Role: UCC28510DWR controls boost PFC and forward-converter PWM with 71% PFC UVLO2 turn-off threshold to maximize hold-up time before graceful shutdown. Use Value: Extends hold-up duration by 22% versus standard 50% threshold parts, allowing use of lower-cost 220-µF bulk capacitors without compromising spec compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PFC+PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28511DWR | Lower UVLO turn-on (10.2 V) and reduced hysteresis (0.5 V) - suited for low-line or wide-input-range designs. | Enables reliable startup down to 85 VAC with marginal hold-up margin; less immune to line noise-induced false turn-off. | Select UCC28511DWR when operating near minimum AC input or requiring faster UVLO response in variable-line environments. |
| UCC28070DWR | Dedicated CCM PFC controller (no integrated PWM); requires external PWM IC; higher PFC accuracy (0.999 PF) and better light-load efficiency. | Used in high-efficiency server PSUs where PFC and PWM are optimized separately; adds complexity but improves 10–20% load efficiency by 0.5%. | Choose UCC28070DWR + standalone PWM IC when >95% full-load efficiency is mandatory and board space allows dual-controller layout. |
Compared with UCC28511DWR, UCC28510DWR offers higher UVLO hysteresis for noise immunity and longer hold-up time; compared with UCC28070DWR, it trades PFC precision for integration simplicity and lower component count in mid-power industrial supplies.
Availability
UCC28510DWR is available at Aetrix Electronics and suitable for industrial AC-DC power supplies, medical equipment power modules, LED driver power stages, and telecom rectifier units requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for UCC28510DWR 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 IC design.
The UCC28510DWR belongs to TI's UCC2851x family of combination PFC/PWM controllers, engineered specifically for cost-sensitive, space-constrained offline power systems needing IEC 61000-3-2 compliance and simplified bill-of-materials.
FAQ
What is the primary function of the UCC28510DWR in an AC-DC power supply?
The UCC28510DWR integrates power factor correction (PFC) and pulse-width modulation (PWM) control functions into a single IC. It manages both the boost PFC stage and the isolated DC-DC converter stage-such as flyback or forward-with synchronized timing, eliminating the need for two separate controllers and reducing system complexity and component count in 200–300 W offline power supplies.
How does the UCC28510DWR achieve IEC 61000-3-2 compliance?
The UCC28510DWR achieves IEC 61000-3-2 compliance through average-current-mode PFC control with input voltage feedforward (via VFF), a highly linear multiplier, and continuous conduction mode (CCM) operation. Its leading-edge PFC modulation combined with trailing-edge PWM minimizes harmonic distortion in the input current waveform, ensuring total harmonic distortion (THD) remains below mandated limits across all load conditions.
What is the significance of the 1:1 PFC:PWM frequency ratio in the UCC28510DWR?
The 1:1 PFC:PWM frequency ratio in the UCC28510DWR means both control stages operate at the same switching frequency (e.g., 200 kHz), simplifying EMI filter design and enabling deterministic interleaving without external clock dividers. This ratio is fixed for the UCC28510DWR variant and ensures optimal ripple cancellation in the PFC bulk capacitor, directly contributing to higher reliability and smaller passive component sizing.
Can the UCC28510DWR support zero-power detection and automatic shutdown?
Yes, the UCC28510DWR includes a dedicated zero-power detect comparator that monitors the VAOUT pin. When VAOUT falls below 0.33 V (with 90 mV hysteresis), the device disables both GT1 and GT2 gate drivers, halting switching activity and reducing no-load input power to <300 mW-critical for meeting energy efficiency standards like ENERGY STAR and EU CoC Tier 2 in standby mode.
What are the key differences between UCC28510DWR and UCC28511DWR?
The UCC28510DWR and UCC28511DWR share identical pinout and core functionality but differ in UVLO thresholds: UCC28510DWR uses 16 V turn-on / 6.3 V hysteresis, while UCC28511DWR uses 10.2 V turn-on / 0.5 V hysteresis. This makes UCC28511DWR better suited for low-line or wide-input applications, whereas UCC28510DWR provides superior noise immunity and longer hold-up time in stable 230 VAC environments.
UCC28510DWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- 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
UCC28510DWR FAQ
1.How can I place an order for UCC28510DWR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28510DWR 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 UCC28510DWR reliable?
The price and inventory of UCC28510DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28510DWR is usually 5 days.
3.What payment methods are accepted for UCC28510DWR?
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Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28510DWR?
UCC28510DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28510DWR 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 UCC28510DWR?
For technical support, including UCC28510DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28510DWR requirements.
6.How does Aetrix verify that UCC28510DWR is sourced from the original manufacturer or authorized distributors?
All UCC28510DWR 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 UCC28510DWR meets industry standards.
7.What is the process for return or replacement of UCC28510DWR?
All UCC28510DWR units undergo pre-shipment inspection (PSI). If there is an issue with UCC28510DWR, 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 UCC28510DWR part is unused and in its original packaging.
Return procedure for UCC28510DWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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