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Texas Instruments UCC28810DR
- Part No.:
- UCC28810DR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UCC28810DR.pdf
- Description:
- IC LED DRV OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:9,145
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Product details
Overview
UCC28810DR from Texas Instruments is a transition-mode LED lighting power controller for single-stage, triac-dimmable AC-input PFC flyback converters. It implements critical conduction mode (CrCM) control with transformer zero-energy detection (TZE), delivers ±750-mA peak gate drive, features 2.5-V internal VREF (±2%), and operates across –40°C to 105°C for commercial/residential retrofit luminaires.
For engineers reviewing the UCC28810DR datasheet, UCC28810DR pinout, UCC28810DR application, or UCC28810DR equivalent, this page provides verified CrCM controller specifications, SOIC-8 terminal roles, triac-dimming interface behavior, OVP/enable protection logic, and validated alternatives for AC-input LED driver design.
Technical Context
The UCC28810DR uses a transconductance error amplifier (gM = 90 µS typ.) with slew-rate enhancement activated when VSENSE deviates >±5% from 2.5 V, enabling fast start-up and transient response. Its current reference generator produces a ramp proportional to both VINS (0–3.5 V input) and (EAOUT – 2.5 V), with +75-mV offset to reduce zero-crossing distortion.
Critical conduction mode operation is governed by TZE pin detection of transformer demagnetization (rising-edge threshold 1.25 V, hysteresis 350 mV), triggering turn-on near valley; turn-off is set by ISENSE comparator (1.70 V max threshold). The restart timer enforces ≥5 kHz minimum switching frequency via 400 µs timeout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Mode | Critical conduction mode (CrCM) with self-oscillating PWM governed by TZE and ISENSE comparators |
| VDD UVLO Turn-On Threshold | 15.8 V - enables faster start-up with smaller hold-up capacitor vs. UCC28811's 12.5 V |
| Internal Voltage Reference | 2.50 V ±2% - ensures tight output regulation and serves as OVP/enable reference |
| Gate Drive Output | ±750-mA peak - directly drives external MOSFET without external buffer in most 25-W designs |
| Error Amplifier gM | 90 µS typ. - defines loop gain and compensation network sizing for stable PFC flyback control |
| TZE Input Threshold | 1.25 V rising edge with 350-mV hysteresis - detects transformer zero-current crossing for valley-switching |
| OVP Activation Threshold | VSENSE > VREF + 0.190 V (7.6% over nominal) - secondary protection against output overvoltage |
Pinout & Package
UCC28810DR is housed in an 8-pin SOIC (D) package with standard JEDEC outline, 150°C/W junction-to-ambient thermal resistance, and Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE (Pin 1) | Inverting input to transconductance amplifier & OVP/enable comparator | Senses regulated output voltage via divider; <0.67 V disables switching; OVP triggers at VREF+0.190 V |
| EAOUT (Pin 2) | Error amplifier output | Drives current reference generator; dynamic range 2.5–4.0 V; 1-mA enhanced sink/source during transients |
| VINS (Pin 3) | Input voltage sense for current reference generator | Accepts 0–3.5 V from line-voltage divider; enables input-current shaping for PFC |
| ISENSE (Pin 4) | Current-sense input to PWM comparator | Compares switch current to reference; includes 75-mV internal offset to improve THD |
| TZE (Pin 5) | Transformer zero-energy detector input | Detects bias-winding voltage drop to zero; active clamps prevent <0.3 V or >6 V excursion |
| GND (Pin 6) | Power and signal ground reference | Must be connected with shortest possible trace to bypass capacitors and power stage return |
| GDRV (Pin 7) | High-current gate drive output | Delivers ±750-mA peak; rise/fall times <75 ns/50 ns into 1-nF load; pull-up/pull-down resistances defined |
| VDD (Pin 8) | Supply input with integrated UVLO | Internally clamped to 20 V; requires ≥0.1-µF high-frequency bypass to GND; 15.8-V turn-on enables compact startup circuit |
Key Features
| Feature | Design Value |
|---|---|
| Triac dimming interface support | Enables phase-cut dimmer compatibility in single-stage AC-input LED drivers without auxiliary circuits |
| Enhanced slew-rate error amplifier | Activates 1-mA sink/source when VSENSE exceeds 2.3 V or falls below 2.1 V, reducing start-up time and output overshoot |
| Zero-power detect function | Shuts down gate drive at light load when EAOUT <2.3 V, preventing overvoltage without auxiliary winding feedback |
| Integrated OVP and enable protection | Disables switching if VSENSE <0.67 V (open-feedback fault) or >VREF+0.190 V (output overvoltage) |
| Low start-up current | 75–125 µA off-state current enables direct rectified-line startup with minimal dissipation in VDD resistor |
Applications
| Commercial Retrofit Luminaires | Residential LED Downlights |
|---|---|
Use Scenario: 25-W triac-dimmable LED driver replacing incandescent bulbs in existing wall-dimmer-controlled fixtures. IC Role / Device Role / Timing Role: UCC28810DR acts as CrCM PFC controller, generating valley-switched gate pulses synchronized to AC line zero-crossings via TZE detection. Use Value: Achieves >0.9 PF and <20% THD while maintaining smooth dimming down to 10% with no flicker or pop-on artifacts. |
Use Scenario: Isolated, single-stage flyback LED driver powering 12–24 VDC strings in ceiling-mounted residential downlights. IC Role / Device Role / Timing Role: UCC28810DR regulates constant current output using VSENSE feedback and controls MOSFET switching via GDRV with precise ISENSE-based current limiting. Use Value: Delivers ±3% LED current accuracy over line/load/temperature with built-in OVP and open-feedback protection. |
| Outdoor Area Lighting | Industrial Task Lighting |
Use Scenario: 30-W outdoor LED fixture for parking lot illumination operating from 120/277 VAC with wide temperature range. IC Role / Device Role / Timing Role: UCC28810DR manages critical conduction mode in boost-derived topology, using VINS to shape input current and TZE to minimize switching loss. Use Value: Sustains full output power from –40°C to 105°C ambient with no derating, enabled by low 4–6 mA operating current and robust UVLO hysteresis. |
Use Scenario: High-reliability LED task light in factory environments requiring EMI compliance and surge immunity. IC Role / Device Role / Timing Role: UCC28810DR implements single-stage PFC flyback with integrated restart timer and zero-power detect to suppress light-load oscillation. Use Value: Eliminates need for auxiliary bias winding or secondary-side controller, reducing BOM count and improving system-level MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED lighting power controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28811DR | UVLO turn-on at 12.5 V (vs. 15.8 V); gM amplifier source current 300 µA (vs. 1.3 mA) | Designed for two-stage converters where downstream PWM controls startup; lower transient response suits larger-area luminaires | Select UCC28811DR only when interfacing with external PWM controller or requiring slower error amplifier response |
| NCP1653ADR2G | Fixed-frequency CCM/PFC controller; no TZE pin; 500-mA gate drive; different compensation architecture | Requires separate dimming interface IC; suited for non-dimmable or 0–10 V dimmed systems, not triac phase-cut | Choose NCP1653ADR2G for cost-sensitive non-dimmable applications where CrCM valley switching is not required |
Compared with UCC28811DR and NCP1653ADR2G, the UCC28810DR uniquely combines triac-dimming readiness, valley-switching CrCM operation, and high gate drive strength in a single SOIC-8 package-making it optimal for compact, single-stage, dimmable LED drivers where fast transient response and small VDD capacitance are critical.
Availability
UCC28810DR is available at Aetrix Electronics and suitable for commercial retrofit luminaires, residential LED downlights, outdoor area lighting, and industrial task lighting requiring stable component supply and long-term production continuity.
Supply support for UCC28810DR 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 power conversion IP.
The UCC28810DR belongs to TI's LED lighting power controller product line, designed specifically for cost-effective, single-stage, triac-dimmable AC-input LED drivers targeting residential and commercial retrofit markets.
FAQ
What is the primary control topology implemented by the UCC28810DR?
The UCC28810DR implements critical conduction mode (CrCM) control in flyback, buck, or boost topologies. It uses transformer zero-energy detection (TZE pin) to trigger valley-switching turn-on and current-sense comparison (ISENSE pin) to terminate each switching cycle, achieving high efficiency and low EMI without requiring external timing components.
How does the UCC28810DR support triac dimming compatibility?
The UCC28810DR supports triac dimming through its inherent CrCM operation and zero-power detect function. When paired with appropriate input filtering and snubbing, it maintains stable conduction across phase-cut waveforms. The TZE pin synchronizes switching to line zero-crossings, while the 15.8-V UVLO ensures reliable restart after dimmer-induced hold-off periods.
What protection features are integrated into the UCC28810DR?
The UCC28810DR integrates overvoltage protection (OVP), open-feedback protection (via VSENSE enable threshold), overcurrent limiting (via ISENSE comparator), and thermal-safe restart (via 400-µs timer). Its zero-power detect shuts down gate drive under light-load conditions to prevent output overvoltage, eliminating need for auxiliary winding feedback.
What is the role of the VINS pin on the UCC28810DR?
The VINS pin on the UCC28810DR accepts a scaled representation of the rectified AC input voltage (0–3.5 V range) and feeds it to the current reference generator. This enables input-current shaping proportional to the line voltage, achieving >0.9 power factor without additional control loops or external multipliers.
Can the UCC28810DR operate without an optocoupler in isolated flyback designs?
No-the UCC28810DR requires feedback from the secondary side for regulation. In isolated flyback designs, the VSENSE pin must be connected via an optocoupler (e.g., CNY17-3S as shown in TI reference design SLUS865) to close the voltage loop. The EAOUT pin connects to the optocoupler's LED cathode, enabling primary-side regulation with secondary-side sensing.
UCC28810DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, SEPIC, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- 750mA
- Frequency:
- -
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
UCC28810DR FAQ
1.How can I place an order for UCC28810DR through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28810DR 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 UCC28810DR reliable?
The price and inventory of UCC28810DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28810DR is usually 5 days.
3.What payment methods are accepted for UCC28810DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28810DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28810DR?
UCC28810DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28810DR 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 UCC28810DR?
For technical support, including UCC28810DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28810DR requirements.
6.How does Aetrix verify that UCC28810DR is sourced from the original manufacturer or authorized distributors?
All UCC28810DR 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 UCC28810DR meets industry standards.
7.What is the process for return or replacement of UCC28810DR?
All UCC28810DR units undergo pre-shipment inspection (PSI). If there is an issue with UCC28810DR, 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 UCC28810DR part is unused and in its original packaging.
Return procedure for UCC28810DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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