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Texas Instruments TPS92075DDCR/NOPB
- Part No.:
- TPS92075DDCR/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-6 Thin, TSOT-23-6
- Datasheet:
-
TPS92075DDCR/NOPB.pdf
- Description:
- IC LED DRV OFFL TRIAC SOT23-THIN
- Quantity:
- Payment:
- Shipping:
Inventory:2,925
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Product details
Overview
TPS92075DDCR/NOPB from Texas Instruments is a non-isolated, phase-dimmable buck PFC LED driver IC with integrated digital phase-angle decoder and analog current reference control. It operates from 11–18 VVCC, delivers constant LED current via ISNS-sensed peak-current regulation, supports leading/trailing-edge TRIAC dimmers, and implements phase-symmetry balancing for flicker-free operation in bulb-replacement and area lighting applications.
For engineers reviewing the TPS92075DDCR/NOPB datasheet, TPS92075DDCR/NOPB pinout, TPS92075DDCR/NOPB application, or TPS92075DDCR/NOPB equivalent, key selection criteria include its 6-pin TSOT package, 1.2 V ISNS current limit threshold, 160°C thermal shutdown, 18 V VCC overvoltage protection, and digital 50/60 Hz synchronization for robust dimmer compatibility across residential and commercial AC line environments.
Technical Context
The TPS92075DDCR/NOPB uses a hysteretic, peak-current-controlled, constant off-time architecture to regulate LED current in buck or buck-boost topologies. Its internal digital controller continuously analyzes ASNS pin waveform symmetry and conduction angle to derive a dynamic analog reference (0–1 V, 127-level DAC), enabling DC-mode dimming control below 70% conduction and ramp-mode PFC optimization above 70%.
It integrates a patent-pending phase-symmetry balancing algorithm that adjusts cycle-by-cycle reference levels when positive/negative half-cycle conduction angle mismatch exceeds 20%, directly suppressing LED current ripple and visible flicker. The device also implements active hold by increasing the reference post-ASNS-fall to maintain output energy delivery during input dropout in buck configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 11–18 V - powers internal logic and gate driver; supports resistive, auxiliary-winding, or coupled-capacitor start-up without external LDO. |
| ISNS Threshold | 445–555 mV (typ. 500 mV) - sets peak inductor current via external sense resistor; enables precise, temperature-stable LED current regulation. |
| ASNS Thresholds | Rising: 0.9–1.1 V; Falling: 0.465–0.540 V - detects TRIAC firing angle with built-in 150 µs digital filtering to reject noise and ensure reliable dimmer decoding. |
| COFF Threshold | 1.14–1.285 V - defines constant off-time via external capacitor; variation creates emulated spread-spectrum effect to ease EMI filter design. |
| Thermal Shutdown | 160°C (±5°C) with 20°C hysteresis - disables GATE output until die cools to ~140°C; protects against sustained overloads in enclosed fixtures. |
| VCC OVP/UVLO | OVP: 18.0–20.0 V; UVLO rising: 9.8–10.5 V, falling: 5.75–6.40 V - ensures stable start-up and fault isolation in wide-input AC-DC systems. |
| Gate Drive | RGATE(H)/RGATE(L): 3–8 Ω - provides low-impedance sourcing/sinking for fast MOSFET switching; minimizes switching losses in high-frequency buck stages. |
Pinout & Package
TPS92075DDCR/NOPB is housed in a thermally enhanced 6-pin TSOT package (2.9 mm × 1.6 mm × 0.8 mm), optimized for compact LED lamp PCBs with exposed pad for improved heat dissipation (θJB = 24.6°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (ASNS) | Phase-angle input | Digital decoder input for TRIAC conduction angle detection; thresholds at ~1 V rise / ~0.5 V fall enable robust dimmer signal capture. |
| 2 (GND) | Power ground | Common return for ISNS, COFF, and internal regulator; must be low-impedance connection to minimize sensing error and EMI. |
| 3 (ISNS) | Current sense input | Compares MOSFET source voltage to DAC-derived reference; triggers GATE turn-off when sensed voltage reaches programmed threshold. |
| 4 (GATE) | Power switch driver | Drives external N-channel MOSFET gate; 3–8 Ω on/off resistance supports fast switching with minimal shoot-through risk. |
| 5 (VCC) | Bias supply input | Accepts 11–18 V DC; includes UVLO (6.4 V fall) and OVP (18 V) for self-protection; powers internal regulator and gate driver. |
| 6 (COFF) | Constant off-time timing | Connects to external capacitor; internal 33–60 Ω pull-down sets off-time duration (max 280 µs); enables spread-spectrum EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Digital phase-angle decoder | Processes ASNS waveform in real time to extract conduction angle and symmetry-enables flicker-free dimming without external microcontroller. |
| Phase-symmetry balancing | Adjusts per-cycle reference level when positive/negative half-cycle conduction differs >20%-eliminates visible 100/120 Hz LED current ripple. |
| Active hold control | Boosts reference post-ASNS-fall in buck topology-maintains energy transfer during AC line dropout and suppresses input filter resonance-induced flicker. |
| Patent-pending ramp mode | Generates synchronized triangular reference above 70% conduction-achieves >0.9 PF and low THD without complex analog circuitry or large passive filters. |
| Lossless dimming translation | Shifts output demand higher at low dimming angles-draws sufficient hold current from TRIAC without external resistive circuits or heat generation. |
Applications
| Bulb Replacement | Residential Dimmable Lamps |
|---|---|
Use Scenario: Retrofit A19/E26 LED bulbs compatible with legacy wall-mounted TRIAC dimmers in homes and apartments. IC Role / Device Role / Timing Role: Primary PFC LED driver controlling buck converter; decodes phase-cut waveform and regulates constant current with <2% ripple. Use Value: Eliminates need for external hold circuitry and reduces BOM count by integrating dimmer interface, reference generation, and protection in one 6-pin IC. |
Use Scenario: Integrated downlight modules requiring smooth 10–100% dimming range with no audible noise or visible flicker. IC Role / Device Role / Timing Role: Constant-current controller with digital synchronization to 50/60 Hz line; implements active hold and phase-balancing in real time. Use Value: Achieves flicker index <0.01 under worst-case dimmer asymmetry, meeting IEEE 1789-2015 low-risk classification for human visual comfort. |
| Commercial Area Lighting | Industrial LED Troffers |
Use Scenario: 2×2 and 2×4 LED troffer fixtures deployed in offices, schools, and hospitals with centralized dimming control. IC Role / Device Role / Timing Role: Non-isolated buck PFC driver managing up to 30 W LED load; handles deep dimming (≤10%) while maintaining >0.95 power factor. Use Value: Ramp-mode operation above 70% conduction delivers <10% THD and eliminates need for bulky EMI filters-reducing system size and cost. |
Use Scenario: High-reliability LED luminaires operating in ambient temperatures up to 85°C inside enclosed ceiling plenums. IC Role / Device Role / Timing Role: Thermally protected LED driver with 160°C shutdown and junction-to-board thermal resistance of 24.6°C/W for stable long-life operation. Use Value: Enables compact TSOT layout with direct thermal coupling to PCB copper-extends lifetime beyond 50,000 hours at full load and 70°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar phase-dimmable LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AL8862SP-13 | 65 V max VIN, external MOSFET, no integrated dimmer decoder-requires external zero-cross detection and MCU-based angle processing. | Supports higher input voltages but adds complexity; lacks phase-symmetry balancing and active hold features. | Preferred where input voltage exceeds 18 V or where discrete MOSFET selection is required for thermal management. |
| NCL30001DR2G | Analog-based PFC controller with fixed off-time; no digital dimmer decoding-relies on external RC network for angle sensing and lacks ramp mode. | Lower component count but limited dimmer compatibility; cannot correct for TRIAC asymmetry or implement active hold. | Suitable for cost-sensitive non-dimming or basic trailing-edge dimming applications where flicker tolerance is relaxed. |
Compared with AL8862SP-13 and NCL30001DR2G, the TPS92075DDCR/NOPB uniquely integrates digital dimmer decoding, phase-symmetry balancing, and active hold in a 6-pin package-delivering flicker-free dimming performance with minimal external components and no firmware development.
Availability
TPS92075DDCR/NOPB is available at Aetrix Electronics and suitable for bulb replacement, residential dimmable lamps, and commercial area lighting requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for TPS92075DDCR/NOPB 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.
The TPS92075DDCR/NOPB belongs to TI's AC-DC LED driver product line, engineered specifically for phase-dimmable, non-isolated buck/buck-boost topologies in retrofit and integrated luminaires-prioritizing flicker suppression, dimmer interoperability, and thermal robustness.
FAQ
What is the primary function of the ASNS pin on the TPS92075DDCR/NOPB?
The ASNS pin on the TPS92075DDCR/NOPB serves as the dedicated input for detecting TRIAC phase-cut waveforms. It samples the rectified AC line to determine conduction angle length and symmetry, enabling the internal digital decoder to generate a dynamic analog reference for dimming control. With nominal rising/falling thresholds of 1.0 V and 0.5 V, it rejects noise via 150 µs digital filtering-ensuring reliable operation across diverse dimmer brands and models.
Does the TPS92075DDCR/NOPB support both leading- and trailing-edge dimmers?
Yes, the TPS92075DDCR/NOPB explicitly supports both leading- and trailing-edge dimmers, as confirmed in its official datasheet features list. Its digital phase-angle decoder interprets conduction timing regardless of edge type, and its phase-symmetry balancing algorithm actively corrects for asymmetry inherent in many leading-edge TRIAC dimmers. This dual compatibility eliminates the need for separate driver variants in mixed-dimmer installations.
How does the TPS92075DDCR/NOPB achieve flicker-free dimming at low conduction angles?
The TPS92075DDCR/NOPB achieves flicker-free dimming at low conduction angles through three coordinated mechanisms: (1) lossless dimming translation that increases current demand at low angles to sustain TRIAC hold current, (2) active hold control that boosts the reference post-ASNS-fall to extend energy delivery during line dropout, and (3) phase-symmetry balancing that equalizes LED current between positive/negative half-cycles when conduction mismatch exceeds 20%. Together, these eliminate 100/120 Hz ripple without external circuitry.
What is the maximum off-time capability of the TPS92075DDCR/NOPB, and how is it set?
The TPS92075DDCR/NOPB has a maximum off-time of 280 µs, which is determined by the external capacitor connected to the COFF pin. An internal 33–60 Ω pull-down resistor discharges this capacitor until its voltage reaches the 1.14–1.285 V threshold, triggering the next switching cycle. This constant off-time architecture inherently varies switching frequency to create an emulated spread-spectrum effect-reducing EMI filter requirements and enabling smaller input filter designs.
Can the TPS92075DDCR/NOPB operate without an ASNS signal, and what happens if it's lost?
Yes, the TPS92075DDCR/NOPB can operate without an ASNS signal: if the ASNS pin remains unconnected or the signal is lost (e.g., due to very narrow conduction <250 µs), the device defaults to a static 0.33 V (42/127) reference and continues constant-current operation. In this mode, dimming, ramp mode, active hold, and phase-balancing are disabled-but the IC maintains safe LED current regulation, making it suitable for non-dimming applications or fallback operation during dimmer failure.
TPS92075DDCR/NOPB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6 Thin, TSOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Step-Down (Buck), Step-Up (Boost)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 11V
- Voltage - Supply (Max):
- 18V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- -
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-THIN
TPS92075DDCR/NOPB FAQ
1.How can I place an order for TPS92075DDCR/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92075DDCR/NOPB 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 TPS92075DDCR/NOPB reliable?
The price and inventory of TPS92075DDCR/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92075DDCR/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92075DDCR/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92075DDCR/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92075DDCR/NOPB?
TPS92075DDCR/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92075DDCR/NOPB 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 TPS92075DDCR/NOPB?
For technical support, including TPS92075DDCR/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92075DDCR/NOPB requirements.
6.How does Aetrix verify that TPS92075DDCR/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92075DDCR/NOPB 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 TPS92075DDCR/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92075DDCR/NOPB?
All TPS92075DDCR/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92075DDCR/NOPB, 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 TPS92075DDCR/NOPB part is unused and in its original packaging.
Return procedure for TPS92075DDCR/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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