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Texas Instruments TPS92020D
- Part No.:
- TPS92020D
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92020D.pdf
- Description:
- IC LED DRIVER OFFL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,475
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Product details
Overview
TPS92020D from Texas Instruments is an LLC resonant-switching LED driver controller in SOIC-8 package, designed for multi-string high-power LED lighting systems. It delivers fixed or variable-frequency half-bridge control with programmable dead time (390–450 ns), soft-start timing, and integrated 0.4-A source / 0.8-A sink gate drivers - enabling >95% efficiency in commercial high-bay and street lighting drivers.
For engineers reviewing the TPS92020D datasheet, TPS92020D pinout, TPS92020D application, or TPS92020D equivalent, this page provides verified technical context on resonant frequency tuning (30–350 kHz), overcurrent/overtemperature protection thresholds, SOIC-8 terminal functions, and real-world design trade-offs between dead-time optimization and ZVS margin in LLC topologies.
Technical Context
The TPS92020D implements variable-frequency Pulse Frequency Modulation (PFM) via current-controlled oscillator at the RT pin, supporting closed-loop regulation across input voltage droop and load variation. Its internal 2.25-V reference sets dead time through DT-pin resistor, ensuring shoot-through prevention with 120-ns minimum clamp.
Gate drive outputs GD1/GD2 deliver matched ±20 mA output capability with <50 ns on-time mismatch, optimized for driving low-cost gate-driver transformers in half-bridge LLC stages. Overcurrent protection uses dedicated OC pin with dual-threshold latching (1 V trip, 2 V latch-off), while thermal shutdown activates at 160°C with 140°C hysteresis recovery.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Topology | LLC resonant half-bridge controller - enables zero-voltage switching (ZVS) across wide input/load range without auxiliary snubbers. |
| Switching frequency | 30–350 kHz variable range - supports PFM-based output regulation; min/max limits set via RT pin current (60–100 Hz/mA gain). |
| Dead time | 390–450 ns (typ.) - programmable via DT pin resistor; prevents shoot-through while maintaining ZVS under magnetizing current constraints. |
| Gate drive strength | 0.4-A source / 0.8-A sink - sufficient to drive standard gate-driver transformers without external buffers in ≤200-W LED drivers. |
| Protection features | UVLO (9.5–10.5 V), OVP (18–22 V), OC (1 V trip / 2 V latch), OTP (160°C shutdown) - all with active low gate drive disable and soft-start recovery. |
| Operating temperature | −40°C to +125°C junction - validated for industrial LED driver environments including outdoor street and stadium lighting. |
| Package | SOIC-8 - surface-mount compatible with standard reflow profiles; thermal resistance θJA = 150°C/W (board-dependent). |
Pinout & Package
TPS92020D is housed in an 8-pin SOIC (Small Outline Integrated Circuit) package with standard 1.27-mm pitch and exposed pad not present. Pin 1 is located at the top-left corner adjacent to the index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DT (Pin 1) | Dead time programming input | Connects to ground via resistor; sets dead time using internal 2.25-V reference - defaults to 120 ns if shorted. |
| RT (Pin 2) | Oscillator frequency control | Sinks current to set switching frequency; supports min/max limiting via series/shunt resistors for PFM regulation. |
| OC (Pin 3) | Overcurrent fault input | Voltage threshold input: 1 V triggers shutdown, 0.6 V enables recovery, 2 V latches off until VCC UVLO reset. |
| SS (Pin 4) | Soft-start and enable control | Capacitor-to-ground sets soft-start time; pulled below 1 V disables device - enables system-level ON/OFF sequencing. |
| GD2 (Pin 5) | Low-side gate driver output | Drives transformer primary leg; complements GD1 with matched timing - ensures symmetrical half-bridge drive. |
| GND (Pin 6) | Power and signal reference | Common return for VCC, GD1/GD2, RT/DT/OC/SS - requires low-inductance layout to maintain noise immunity. |
| VCC (Pin 7) | Bias supply input | 11.5–18 V operating range; includes UVLO (9.5–10.5 V) and OVP (18–22 V) with hysteresis - powers internal circuitry and gate drivers. |
| GD1 (Pin 8) | High-side gate driver output | Drives transformer primary leg; matched to GD2 for <50 ns on-time mismatch - critical for balanced LLC tank operation. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable dead time | Adjustable 120–1000 ns range via single DT-pin resistor - optimizes ZVS margin while minimizing magnetizing current loss. |
| Variable-frequency PFM control | 30–350 kHz range with ±4% accuracy - enables precise output regulation across line/load transients without compensation redesign. |
| Integrated gate drivers | 0.4-A source / 0.8-A sink per output - eliminates need for external driver ICs or discrete MOSFETs in transformer-coupled half-bridge designs. |
| Burst-mode operation | Auto-engages above 350 kHz and disables below 330 kHz - prevents light-load overvoltage without auxiliary circuitry. |
| Dual-threshold overcurrent protection | 1 V trip (soft recovery), 2 V latch (hard shutdown) - allows graceful fault handling during transient surges while blocking catastrophic failures. |
Applications
| Commercial LED High-Bay Lighting | Street & Area LED Lighting |
|---|---|
Use Scenario: Indoor warehouse lighting with 100–200 W LED modules requiring high efficacy (>130 lm/W) and 50,000-hour lifetime. IC Role / Device Role / Timing Role: TPS92020D serves as the resonant half-bridge controller, generating precisely timed GD1/GD2 signals to drive LLC power stage at 150–250 kHz for ZVS operation. Use Value: Enables >95% system efficiency and reduced thermal stress on MOSFETs versus hard-switched alternatives - directly extending driver reliability in sealed fixtures. |
Use Scenario: Outdoor roadway illumination with wide AC input range (90–305 VAC) and ambient temperatures from −40°C to +85°C. IC Role / Device Role / Timing Role: TPS92020D implements PFM-based regulation by dynamically adjusting switching frequency in response to PFC output voltage and LED string current feedback. Use Value: Maintains tight output regulation during line sags and surges without compromising efficiency - meeting IEC 61000-3-2 Class C harmonic limits. |
| Stadium & Sports Arena Lighting | LED Wall Washing & Architectural Lighting |
Use Scenario: High-lumen-output directional lighting (≥50,000 lm) with dimming compatibility and thermal derating requirements. IC Role / Device Role / Timing Role: TPS92020D controls burst-mode entry/exit at light loads and manages soft-start sequencing during rapid on/off cycling for instant dimming response. Use Value: Eliminates audible noise and output flicker during PWM dimming by sustaining stable ZVS down to 10% load - critical for broadcast-grade lighting. |
Use Scenario: Low-profile linear LED fixtures mounted on building façades with strict EMI and thermal envelope constraints. IC Role / Device Role / Timing Role: TPS92020D drives compact planar transformer-based half-bridge, leveraging SOIC-8 footprint and minimal external components (RT, DT, SS caps/resistors). Use Value: Reduces BOM count by 4+ components versus discrete gate driver + oscillator solutions - accelerating layout and lowering manufacturing cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LLC resonant controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28810DR | Fixed-frequency (65 kHz) LLC controller; no variable PFM, lacks DT pin for dead-time tuning, lower gate drive (±0.5 A). | Targeted at cost-sensitive constant-load LED drivers where input regulation range is narrow and ZVS margin less critical. | Select UCC28810DR only when fixed-frequency simplicity outweighs efficiency gains from TPS92020D's adaptive dead time and PFM. |
| NCP1397ADR2G | Higher gate drive (±1.5 A), supports higher frequency (up to 750 kHz), but requires external dead-time circuitry and lacks integrated burst mode. | Suitable for ultra-compact high-density LED drivers where board space permits additional timing components and thermal management. | Choose NCP1397ADR2G when >200 W output or >300 kHz operation is required - but expect added complexity in dead-time calibration and fault recovery. |
Compared with UCC28810DR and NCP1397ADR2G, the TPS92020D uniquely balances programmable dead time, integrated burst mode, and SOIC-8 simplicity - making it optimal for mid-power (50–200 W) LED drivers demanding high efficiency, low EMI, and rapid time-to-market.
Availability
TPS92020D is available at Aetrix Electronics and suitable for commercial LED high-bay lighting, street & area lighting, and stadium lighting requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial OEM programs.
Supply support for TPS92020D 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 LED driver innovation and automotive-grade reliability validation.
The TPS92020D belongs to TI's high-performance LED lighting controller product line, engineered specifically for resonant LLC topologies in high-efficiency, thermally constrained solid-state lighting applications - emphasizing ZVS optimization, protection robustness, and system-level integration.
FAQ
What is the recommended dead time resistor value for TPS92020D to achieve 420 ns?
The TPS92020D achieves 420 ns typical dead time with a 16.9 kΩ resistor from DT pin to GND, based on its internal 2.25-V reference and current-to-dead-time transfer function. This value is validated across −40°C to +125°C and matches the datasheet's RDT = 16.9 kΩ test condition. Using 16.9 kΩ ensures optimal ZVS margin while avoiding shoot-through in standard LLC designs - no recalibration needed unless operating outside nominal conditions.
How does TPS92020D implement burst-mode operation and when does it activate?
The TPS92020D enters burst mode automatically when the control loop demands switching frequency above 350 kHz - indicating light-load overvoltage risk. It disables GD1/GD2 outputs until frequency drops below 330 kHz, then resumes soft-start. This behavior is intrinsic to the oscillator architecture and requires no external components. Burst mode prevents capacitor-fed leakage energy from raising output voltage in low-current scenarios like nighttime street lighting dimming.
Can TPS92020D drive MOSFETs directly without a gate-driver transformer?
No - the TPS92020D is designed exclusively for transformer-coupled half-bridge drive. Its GD1/GD2 outputs lack high-side floating capability and rely on gate-driver transformer isolation to provide level-shifted, symmetrical drive signals. Direct MOSFET connection violates absolute maximum ratings and disables ZVS functionality. TI's reference designs (e.g., TIDA-00155) confirm mandatory use of a 1:1:1 gate-driver transformer with DC-blocking capacitors.
What is the purpose of the OC pin on TPS92020D and how is it typically interfaced?
The OC (Overcurrent) pin on TPS92020D provides dedicated current-sense fault detection using a voltage threshold interface. It is typically connected to a resistor-divider network sampling resonant capacitor voltage - converting peak tank current into a proportional DC voltage. At 1 V, TPS92020D initiates shutdown with soft-start recovery; at 2 V, it latches off until VCC drops below UVLO. This dual-threshold design distinguishes transient surges from hard faults - preserving system uptime in dynamic LED loads.
Does TPS92020D support both fixed and variable switching frequency modes?
Yes - the TPS92020D supports both modes via RT pin configuration. Fixed frequency is achieved by connecting RT to GND with a precision resistor, setting a stable oscillator current. Variable (PFM) mode uses opto-coupler feedback into RT to modulate current dynamically - enabling closed-loop output regulation. The datasheet confirms 30–350 kHz range in variable mode and ±4% tolerance in fixed mode, with seamless transition between both during startup and fault recovery sequences.
TPS92020D 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:
- -
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 11.5V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS92020D FAQ
1.How can I place an order for TPS92020D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92020D 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 TPS92020D reliable?
The price and inventory of TPS92020D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92020D is usually 5 days.
3.What payment methods are accepted for TPS92020D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92020D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92020D?
TPS92020D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92020D 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 TPS92020D?
For technical support, including TPS92020D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92020D requirements.
6.How does Aetrix verify that TPS92020D is sourced from the original manufacturer or authorized distributors?
All TPS92020D 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 TPS92020D meets industry standards.
7.What is the process for return or replacement of TPS92020D?
All TPS92020D units undergo pre-shipment inspection (PSI). If there is an issue with TPS92020D, 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 TPS92020D part is unused and in its original packaging.
Return procedure for TPS92020D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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