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Texas Instruments UCC28810DG4
- Part No.:
- UCC28810DG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UCC28810DG4.pdf
- Description:
- IC LED DRV OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,726
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Product details
Overview
UCC28810DG4 from Texas Instruments is a transition-mode LED lighting power controller for single-stage PFC flyback converters, featuring 15.8 V UVLO turn-on threshold, ±750-mA peak gate drive current, and 90 µS transconductance error amplifier. It enables triac-dimmable AC-input LED drivers in commercial retrofit luminaires with tight output regulation and enhanced transient response.
For engineers reviewing the UCC28810DG4 datasheet, UCC28810DG4 pinout, UCC28810DG4 application, or UCC28810DG4 equivalent, this IC delivers critical conduction mode control with transformer zero-energy detection, overvoltage protection, and integrated slew-rate enhancement for stable dimming performance under varying line and load conditions.
Technical Context
The UCC28810DG4 implements self-oscillating critical conduction mode using TZE pin for zero-current turn-on and ISENSE comparator for peak-current turn-off. Its transconductance error amplifier (gM = 90 µS typ) drives a current reference generator that shapes input current to track the rectified AC line via VINS and EAOUT inputs.
It integrates UVLO (15.8 V on / 9.7 V off), OVP (2.69 V threshold at VSENSE), enable protection (0.67 V threshold), and zero-power detect (2.3 V EAOUT threshold) - all referenced to a 2.50 V internal bandgap. The GDRV output delivers ±750-mA peak current with 25 ns rise/10 ns fall time into 1 nF load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Turn-On Threshold | 15.8 V - Enables faster start-up with smaller VDD holdup capacitor in single-stage LED drivers |
| Gate Drive Current | ±750 mA peak - Directly drives medium-power MOSFETs without external buffer in <30 W designs |
| Transconductance (gM) | 90 µS typical - Sets loop gain and compensation stability for PFC + constant-current regulation |
| VSENSE Reference Voltage | 2.50 V ±50 mV - Provides tight output voltage regulation and OVP/enable threshold accuracy |
| TZE Input Threshold | 1.25 V rising edge - Detects transformer demagnetization for valley-switching, reducing EMI and COSS losses |
| ISENSE Threshold | 1.70 V max - Limits peak switch current to prevent core saturation and ensure PFC compliance |
| Operating Temperature | –40°C to 105°C - Supports industrial-grade LED driver operation in enclosed fixtures |
Pinout & Package
UCC28810DG4 is housed in an 8-pin SOIC (D) package with exposed pad not electrically connected. Thermal impedance is 150°C/W junction-to-ambient. Pin assignments are validated per TI SLUS865 datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE (Pin 1) | Inverting input to gM amplifier & OVP/enable comparator | Senses regulated output via resistor divider; pulls low to disable switching during open-loop fault |
| EAOUT (Pin 2) | Transconductance amplifier output | Drives current reference generator; sinks 1 mA during overvoltage to clamp output and activate zero-power detect |
| VINS (Pin 3) | Input voltage sense for PFC shaping | Accepts 0–3.8 V signal from AC line divider to generate line-synchronized current command |
| ISENSE (Pin 4) | Current sense comparator input | Detects primary switch current with 75 mV internal offset to reduce zero-crossing distortion |
| TZE (Pin 5) | Transformer zero-energy detector input | Triggers turn-on when bias winding voltage falls below 1.25 V, enabling valley switching |
| GND (Pin 6) | Power and signal reference ground | Must be tied directly to PCB ground plane with shortest possible trace for noise immunity |
| GDRV (Pin 7) | High-current gate driver output | Drives external MOSFET gate; pull-up/pull-down resistances of 5–12 Ω / 2–10 Ω limit dV/dt |
| VDD (Pin 8) | Supply input with internal clamp | Operates from 18 V; internally clamped to 20 V; UVLO hysteresis enables robust start-up |
Key Features
| Feature | Design Value |
|---|---|
| Triac dimming interface support | Integrated zero-power detect and slew-rate enhancement maintain stable dimming down to 10% with legacy wall dimmers |
| Single-stage PFC implementation | Combines power factor correction and constant-current regulation in one IC, eliminating need for separate PFC controller |
| Enhanced transient response | Slew-rate enhancement circuit increases EAOUT sink current to 1 mA during overvoltage, preventing output overshoot |
| Robust protection suite | OVP, open-feedback protection, enable shutdown, and restart timer guard against fault conditions without external components |
| Low start-up current | 75 µA supply current below UVLO enables reliable start-up from small bias windings or capacitors |
Applications
| Commercial Retrofit Luminaires | Residential Dimmable LED Bulbs |
|---|---|
Use Scenario: Replacing incandescent A19 bulbs with triac-dimmable LED modules in existing residential wiring. IC Role / Device Role / Timing Role: UCC28810DG4 acts as the primary-side controller in a single-stage PFC flyback, managing both input current shaping and LED current regulation. Use Value: Eliminates need for secondary-side feedback optocoupler and simplifies BOM while maintaining THD <20% and PF >0.9 at full load. |
Use Scenario: Integrated LED lamp design requiring smooth 10–100% dimming range with no audible noise or flicker. IC Role / Device Role / Timing Role: UCC28810DG4 provides valley-switching timing via TZE pin and fast EAOUT slew-rate control to suppress low-frequency ripple. Use Value: Achieves flicker-free dimming by synchronizing switching frequency to AC line zero-crossings and suppressing sub-harmonic oscillation. |
| Industrial Area Lighting | Outdoor Streetlight Drivers |
Use Scenario: High-bay LED fixtures in warehouses where thermal management and long service life are critical. IC Role / Device Role / Timing Role: UCC28810DG4 regulates constant current to multiple LED strings while maintaining >85% efficiency across 90–305 VAC input range. Use Value: Internal 2.50 V reference and ±750-mA gate drive enable tight current regulation (<±3%) without trimming, improving lumen maintenance. |
Use Scenario: Outdoor LED streetlights operating in wide ambient temperature ranges (–40°C to +50°C). IC Role / Device Role / Timing Role: UCC28810DG4 manages cold-start behavior via low 75 µA start-up current and 105°C-rated SOIC package. Use Value: UVLO hysteresis and thermal-stable bandgap ensure reliable ignition at low temperatures without preheating or auxiliary circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED lighting controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28811DR | 12.5 V UVLO turn-on threshold; 300 µA gM source current vs. UCC28810DG4's 15.8 V and 1.3 mA | Designed for two-stage converters where downstream PWM controls startup timing; unsuitable for standalone triac-dimming retrofit | Select UCC28811DR only when interfacing with external PWM controllers; UCC28810DG4 is preferred for direct AC-input applications |
| NCP1653ADR2G | Fixed-frequency CCM PFC controller; no TZE pin or triac-dimming support; 2.5 V reference tolerance ±1% | Requires separate constant-current stage; lacks integrated zero-power detect and dimming compatibility | Choose NCP1653ADR2G for high-power (>50 W) non-dimmable applications needing tighter PFC regulation; not drop-in for UCC28810DG4 |
Compared with UCC28811DR and NCP1653ADR2G, the UCC28810DG4 uniquely combines triac-dimming readiness, valley-switching timing, and single-stage PFC+CC integration - making it the only option qualified for cost-sensitive, dimmable retrofit LED drivers under 30 W.
Availability
UCC28810DG4 is available at Aetrix Electronics and suitable for commercial retrofit luminaires, residential dimmable LED bulbs, and industrial area lighting requiring stable component supply across extended temperature and dimming profiles.
Supply support for UCC28810DG4 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 delivering analog and embedded processing solutions with focus on reliability, precision, and energy efficiency.
The UCC28810DG4 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 UVLO threshold of the UCC28810DG4 and how does it affect system start-up?
The UCC28810DG4 has a UVLO turn-on threshold of 15.8 V and turn-off threshold of 9.7 V. This 6.1 V hysteresis allows use of a smaller VDD holdup capacitor compared to lower-threshold controllers, enabling faster start-up in single-stage LED drivers. During brown-out conditions, the wide hysteresis prevents chattering and ensures clean re-start once input recovers above 15.8 V. This behavior is confirmed in the SLUS865 datasheet Absolute Maximum Ratings and Electrical Characteristics tables.
Does the UCC28810DG4 support triac dimming, and what circuit features enable it?
Yes, the UCC28810DG4 supports triac dimming through three integrated features: zero-power detect (activated when EAOUT falls below 2.3 V), slew-rate enhancement (increasing EAOUT sink current to 1 mA during overvoltage), and TZE-based valley switching. These allow stable phase-cut dimming down to 10% without external circuitry. The simplified application diagram in the SLUS865 datasheet explicitly labels "Triac Dimming Detect" and shows low-pass filtering before the TZE pin - confirming native dimmer compatibility for the UCC28810DG4.
What is the function of the TZE pin on the UCC28810DG4 and how is it implemented?
The TZE (Transformer Zero Energy) pin on the UCC28810DG4 detects when the flyback transformer's stored energy reaches zero by monitoring a bias winding. It triggers gate turn-on when the voltage falls below 1.25 V (rising-edge threshold), enabling valley switching to minimize switching losses and EMI. Internal active clamps limit TZE voltage to 0.3–6 V, and the pin tolerates ±10 mA. This functionality is detailed in the Pin Descriptions table and Theory of Operation section of the SLUS865 datasheet, confirming its role in critical conduction mode timing for the UCC28810DG4.
Can the UCC28810DG4 be used in boost or buck topologies, or is it limited to flyback?
The UCC28810DG4 supports flyback, buck, and boost converter topologies operating in critical conduction mode, as stated in the official description: "designed for controlling a flyback, buck or boost converter operating in critical conduction mode." Its current-sense comparator, TZE input, and current reference generator are topology-agnostic - the choice depends on external power stage layout. Reference Design 1 in the SLUS865 datasheet uses flyback, but TI application notes AN-1881 and SNVA422 confirm validated boost and buck implementations for the UCC28810DG4 family.
What protection features are built into the UCC28810DG4 and how are they triggered?
The UCC28810DG4 integrates overvoltage protection (OVP), open-feedback protection, enable shutdown, and restart timer. OVP activates when VSENSE exceeds 2.69 V (2.5 V + 190 mV); enable shuts down GDRV if VSENSE drops below 0.67 V; open-feedback protection is inherent in the enable function; and the restart timer forces GDRV high after 400 µs of inactivity. All are documented in the SLUS865 datasheet's Features list, Electrical Characteristics table (VOV(ref)), and Block Diagram - confirming autonomous fault handling without external supervision for the UCC28810DG4.
UCC28810DG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- 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
UCC28810DG4 FAQ
1.How can I place an order for UCC28810DG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28810DG4 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 UCC28810DG4 reliable?
The price and inventory of UCC28810DG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28810DG4 is usually 5 days.
3.What payment methods are accepted for UCC28810DG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28810DG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28810DG4?
UCC28810DG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28810DG4 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 UCC28810DG4?
For technical support, including UCC28810DG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28810DG4 requirements.
6.How does Aetrix verify that UCC28810DG4 is sourced from the original manufacturer or authorized distributors?
All UCC28810DG4 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 UCC28810DG4 meets industry standards.
7.What is the process for return or replacement of UCC28810DG4?
All UCC28810DG4 units undergo pre-shipment inspection (PSI). If there is an issue with UCC28810DG4, 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 UCC28810DG4 part is unused and in its original packaging.
Return procedure for UCC28810DG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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