My Inquiry
My Account
Texas Instruments UCC28811D
- Part No.:
- UCC28811D
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
UCC28811D.pdf
- Description:
- IC LED DRIVER OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:850
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
UCC28811D from Texas Instruments is a transition-mode LED lighting power controller for single-stage PFC flyback, buck, or boost converters operating in critical conduction mode (CRM). It delivers ±750-mA peak gate drive, features 12.5-V UVLO turn-on threshold, 300-µA gM amplifier source current, and integrated zero-energy detection for valley-switching-enabling triac-dimmable AC-input LED drivers for street lighting and outdoor luminaires.
For engineers reviewing the UCC28811D datasheet, UCC28811D pinout, UCC28811D application, or UCC28811D equivalent, key selection considerations include its lower UVLO threshold enabling two-stage converter coordination, reduced gM amplifier source current for controlled error voltage ramp-up, OVP/enable/zero-power protection circuits, and SOIC-8 package compatibility with thermal design constraints up to 105°C junction temperature.
Technical Context
The UCC28811D implements CRM control via self-oscillating PWM: turn-on is triggered by transformer zero-energy detection at the TZE pin (1.25-V typical rising threshold), while turn-off is governed by the ISENSE comparator (1.7-V max threshold) with 75-mV internal offset to reduce zero-crossing distortion. Its transconductance error amplifier (90 µS typical gM) drives the current reference generator using VINS and EAOUT inputs to enforce input-current shaping proportional to rectified line voltage.
Unlike the UCC28810D, the UCC28811D uses a 12.5-V UVLO turn-on threshold and 300-µA gM amplifier source current-enabling reliable start-up under downstream PWM control in two-stage topologies and preventing abrupt EAOUT voltage steps during transients. Its integrated slew-rate enhancement activates only when VSENSE exceeds 2.55 V or falls below 2.1 V, improving large-signal response without compromising stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Turn-On Threshold | 12.5 V - enables coordination with downstream PWM controllers in two-stage LED drivers |
| gM Amplifier Source Current | 300 µA - limits EAOUT voltage ramp rate to prevent line-current overshoot during transients |
| Peak Gate Drive Current | ±750 mA - directly drives external MOSFETs without external buffer stages in 25-W designs |
| TZE Rising Threshold | 1.25 V - detects transformer demagnetization for valley-switching, reducing switching losses |
| VSENSE Reference Voltage | 2.50 V - sets output regulation point; OVP triggers at +7.5% (2.69 V) for secondary overvoltage protection |
| Operating Temperature Range | –40°C to 105°C - supports outdoor lighting applications with wide ambient thermal swings |
| Package Thermal Impedance | 150°C/W - defines maximum power dissipation limit (≈167 mW at 105°C ambient) for SOIC-8 layout |
Pinout & Package
UCC28811D is housed in an 8-pin SOIC (D) package with exposed pad not present; thermal performance relies on PCB copper area per JEDEC JESD 51-3/7 standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VSENSE (Pin 1) | Inverting input to gM amplifier & OVP/enable comparator | Senses regulated output via resistive divider; <0.23 V disables switching for open-loop fault protection |
| EAOUT (Pin 2) | Transconductance amplifier output | Drives current reference generator; dynamic range 2.5–4.0 V; 300-µA source current prevents rapid line-current rise |
| VINS (Pin 3) | Input voltage sense for current reference generator | Accepts 0–3.5 V from AC line divider; combined with EAOUT to generate line-shaped current command |
| ISENSE (Pin 4) | Current-sense comparator input | Detects MOSFET peak current; 75-mV internal offset improves THD; clamps at 1.7 V to terminate switching cycle |
| TZE (Pin 5) | Transformer zero-energy detector input | Monitors bias winding; active clamp limits voltage to 0.65–6 V; restart timer triggers after 400 µs no-detection |
| GND (Pin 6) | Signal and power ground reference | Must connect bypass capacitor (≥0.1 µF) with shortest possible trace to minimize noise coupling |
| GDRV (Pin 7) | Gate driver output | Delivers ±750 mA peak; pull-up/pull-down resistances of 5–12 Ω / 2–10 Ω define rise/fall times with external FET gate capacitance |
| VDD (Pin 8) | Supply input with internal clamp | Internally clamped to 20 V; 12.5-V UVLO allows operation with smaller holdup capacitors in two-stage systems |
Key Features
| Feature | Design Value |
|---|---|
| Transition-mode CRM control | Enables >0.95 power factor and low THD in single-stage LED drivers without complex timing circuitry |
| Integrated zero-energy detection | Eliminates need for auxiliary winding sensing ICs; TZE pin directly interfaces with transformer bias winding |
| Triac dimming compatibility | Supports leading-edge phase-cut wall dimmers via input filter damping and transient response optimization |
| Two-stage converter ready | 12.5-V UVLO and 300-µA gM source current allow seamless integration with downstream PWM controllers in streetlight systems |
| OVP, enable, and zero-power protection | Independent comparators disable GDRV if VSENSE opens, exceeds 2.69 V, or drops below 2.3 V-preventing runaway and overvoltage damage |
Applications
| Street Lighting Systems | Commercial Outdoor Luminaires |
|---|---|
Use Scenario: 50–150-W LED streetlights powered from 120/277-VAC mains with requirement for dusk-to-dawn operation and surge immunity. IC Role / Device Role / Timing Role: UCC28811D serves as the primary PFC controller in a two-stage architecture-first stage provides CRM PFC, second stage handles constant-current regulation and dimming interface. Use Value: Lower 12.5-V UVLO enables precise start-up sequencing with downstream PWM ICs; 300-µA gM source current avoids current overshoot during cold-start or line dips. |
Use Scenario: Parking lot and roadway fixtures requiring IP66 rating, 50,000-hour lifetime, and compatibility with 0–10 V or DALI dimming protocols. IC Role / Device Role / Timing Role: UCC28811D operates in single-stage CRM flyback configuration, integrating PFC and DC-DC conversion to reduce BOM count and improve reliability. Use Value: Integrated slew-rate enhancement and zero-power comparator ensure stable regulation across 10:1 dimming range without output voltage drift or audible noise. |
| Industrial Area Lighting | Retrofit High-Bay Fixtures |
Use Scenario: Warehouse and factory high-bay lights operating continuously at elevated ambient temperatures (up to 65°C). IC Role / Device Role / Timing Role: UCC28811D controls a 100-W CRM boost converter delivering constant current to multi-string HB LEDs with thermal foldback. Use Value: –40°C to 105°C operating range and 150°C/W thermal impedance allow direct mounting on aluminum heat sinks without derating in enclosed fixtures. |
Use Scenario: Residential/commercial retrofit lamps replacing 75–125-W metal halide fixtures with screw-in E39/E40 bases. IC Role / Device Role / Timing Role: UCC28811D manages triac-dimmable CRM flyback topology with passive X/Y filtering to meet EN55015 conducted EMI limits. Use Value: Transformer zero-energy detection ensures valley-switching across full dimming range, minimizing EMI generation and improving efficiency at light loads. |
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 |
|---|---|---|---|
| UCC28810D | 15.8-V UVLO turn-on threshold; 1.3-mA gM amplifier source current | Better suited for single-stage residential retrofit where fast start-up and tighter transient response are prioritized | Select UCC28810D when no downstream PWM controller is present and smaller VDD holdup capacitor is required |
| NCP1653ADR2G | Fixed-frequency CCM/PFC controller; no TZE pin; requires external zero-crossing detection | Designed for higher-power (>150 W) industrial LED drivers with strict THD requirements | Choose NCP1653ADR2G only when continuous conduction mode and higher power density outweigh CRM efficiency benefits |
Compared with UCC28810D and NCP1653ADR2G, the UCC28811D uniquely balances two-stage system coordination, CRM efficiency, and triac-dimming robustness-making it optimal for outdoor LED lighting where thermal resilience and dimming fidelity are non-negotiable.
Availability
UCC28811D is available at Aetrix Electronics and suitable for street lighting systems, commercial outdoor luminaires, industrial area lighting, and retrofit high-bay fixtures requiring stable component supply across extended production lifecycles.
Supply support for UCC28811D 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for energy-efficient systems.
The UCC28811D belongs to TI's LED lighting power controller product line, designed specifically for cost-effective, high-reliability AC-input LED drivers requiring power factor correction, triac dimming, and thermal robustness in outdoor and industrial environments.
FAQ
What is the UVLO turn-on threshold voltage for the UCC28811D?
The UCC28811D has a UVLO turn-on threshold of 12.5 V (typical), with a minimum of 12.0 V and maximum of 13.0 V across temperature. This lower threshold compared to the UCC28810D (15.8 V) allows the UCC28811D to be enabled earlier in two-stage power converter architectures where a downstream PWM controller regulates VDD. The 2.8-V hysteresis ensures stable operation during line sags.
How does the UCC28811D implement zero-energy detection for valley switching?
The UCC28811D uses the TZE pin to monitor transformer demagnetization via a bias winding. When the primary current reaches zero, ringing on the bias winding pulls the TZE pin below 1.25 V (rising-edge threshold), triggering the next gate pulse near the voltage valley. Internal active clamps limit TZE voltage to 0.65–6 V, and a 400-µs restart timer forces switching if zero-energy is undetected-ensuring reliable CRM operation in UCC28811D-based LED drivers.
Can the UCC28811D be used in triac-dimmable LED drivers?
Yes, the UCC28811D is explicitly designed for triac-dimmable LED lighting applications. Its enhanced transient response, slew-rate comparator, and input filter damping capability-documented in TI's SLUS865 datasheet-enable stable operation with leading-edge phase-cut dimmers. Reference Design 1 demonstrates a 25-W triac-dimmable PFC flyback using UCC28811D, confirming compatibility with standard wall dimmers without flicker or drop-out.
What is the function of the 75-mV offset in the ISENSE path of the UCC28811D?
The UCC28811D adds a fixed 75-mV offset to the ISENSE signal before it reaches the current-sense comparator. This offset compensates for zero-crossing distortion caused by transformer leakage inductance and MOSFET body diode conduction, improving total harmonic distortion (THD) and power factor across the full AC input cycle. The offset is internal and non-adjustable, ensuring consistent performance without external component tuning in UCC28811D designs.
Does the UCC28811D support overvoltage protection (OVP) and open-feedback protection?
Yes, the UCC28811D integrates dual protection: OVP triggers when VSENSE exceeds 2.69 V (2.5 V + 0.19 V), latching off GDRV until reset; open-feedback protection activates when VSENSE falls below 0.23 V (enable threshold), forcing immediate shutdown. Both functions use dedicated comparators referenced to the 2.5-V internal bandgap, providing independent fault coverage that safeguards LEDs and power stage components in UCC28811D-based systems.
UCC28811D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 105°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
UCC28811D FAQ
1.How can I place an order for UCC28811D through Aetrix?
Please submit a Request for Quotation (RFQ) for UCC28811D 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 UCC28811D reliable?
The price and inventory of UCC28811D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCC28811D is usually 5 days.
3.What payment methods are accepted for UCC28811D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCC28811D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCC28811D?
UCC28811D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCC28811D 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 UCC28811D?
For technical support, including UCC28811D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCC28811D requirements.
6.How does Aetrix verify that UCC28811D is sourced from the original manufacturer or authorized distributors?
All UCC28811D 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 UCC28811D meets industry standards.
7.What is the process for return or replacement of UCC28811D?
All UCC28811D units undergo pre-shipment inspection (PSI). If there is an issue with UCC28811D, 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 UCC28811D part is unused and in its original packaging.
Return procedure for UCC28811D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCC28811D Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
