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Texas Instruments TPS92314AD/NOPB
- Part No.:
- TPS92314AD/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92314AD/NOPB.pdf
- Description:
- IC LED DRIVER OFFL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,021
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Product details
Overview
TPS92314AD/NOPB from Texas Instruments is an off-line primary-side sensing LED controller for high-power lighting, operating in critical-conduction mode (CRM) with adaptive constant-on-time control, 1.15V over-current limit threshold, 8-pin SOIC package, and inherent power factor correction (PFC) for universal AC input applications.
For engineers reviewing the TPS92314AD/NOPB datasheet, TPS92314AD/NOPB pinout, TPS92314AD/NOPB application, or TPS92314AD/NOPB equivalent, this controller enables secondary-side current regulation without optocouplers, supports quasi-resonant valley switching via ZCD, offers programmable delay timing, and integrates thermal shutdown, OVP, and cycle-by-cycle current limiting for residential and solid-state lighting designs.
Technical Context
The TPS92314AD/NOPB implements CRM operation using zero-crossing detection (ZCD) on an auxiliary winding to trigger valley-switching, minimizing switching loss and EMI. Its adaptive constant-on-time (COT) algorithm dynamically adjusts tON based on primary inductor peak current and secondary discharge time, referenced to a 1.15V ISNS threshold.
Control relies on internal ramp comparison with COMP voltage, while protection functions include VCC UVLO (22.5–28.3V turn-on), ZCD over-voltage lockout (3.9–4.7V), and thermal shutdown at 165°C. The device requires no secondary feedback components and achieves >0.9 PF across 85–265VAC input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Turn-on Threshold | 22.5 V (min) - ensures reliable startup above rectified AC line ripple; hysteresis prevents chatter near threshold |
| ISNS Over-Current Threshold | 1.15 V (typ) - sets primary-side current limit for MOSFET Q1; enables cycle-by-cycle protection without secondary sensing |
| Maximum ON Time | 43.9 µs (typ) - constrains peak primary current during low-line conditions; maintains CRM operation under 85VAC |
| Minimum OFF Time | 1.50 µs (typ) - enforces minimum dead time between switching cycles; prevents overlap and ensures ZCD sampling integrity |
| ZCD Arming Threshold | 1.23 V (typ) - defines rising-edge sensitivity for auxiliary winding voltage detection; ensures accurate valley-sensing timing |
| Thermal Shutdown Temp | 165 °C (typ) - disables GATE output to protect IC and external MOSFET; hysteresis of 20°C prevents oscillation near trip point |
| Gate Drive Rise/Fall Time | 94 ns / 16 ns (CLOAD = 1 nF) - supports fast MOSFET switching with low gate charge devices; reduces conduction losses |
Pinout & Package
TPS92314AD/NOPB is housed in an 8-pin SOIC (D) package with exposed pad for thermal enhancement. Pin 1 is VCC; pins are arranged counterclockwise with standard top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Supplies internal bias; requires 10–20 µF bulk capacitor to ground for stable startup and transient immunity |
| AGND | Analog ground reference | Return path for small-signal circuits (COMP, ZCD, DLY); must be separated from PGND to avoid noise coupling |
| ZCD | Zero-crossing detection input | Senses auxiliary winding voltage via resistor divider; triggers valley switching when VZCD falls below 0.6 V (typ) |
| COMP | Error amplifier output | Drives external RC compensation network; sets average LED current regulation bandwidth and stability margin |
| DLY | Delay control input | Programs switch-off-to-on delay via single resistor to ground; optimizes EMI and efficiency by aligning turn-on with resonant valley |
| PGND | Power ground return | High-current return for GATE driver and ISNS sensing; must connect directly to MOSFET source and RISNS ground |
| ISNS | Primary current sense input | Monitors voltage across RISNS; initiates OCP when ≥1.15 V; includes 256 ns propagation delay for fast fault response |
| GATE | High-side MOSFET gate driver | Delivers 9.4 V high-level / 125 mV low-level drive; sinks 50 mA to rapidly discharge MOSFET gate capacitance |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side LED current regulation | Eliminates optocoupler and secondary-side feedback circuitry; reduces BOM cost and improves reliability in isolated flyback designs |
| Adaptive constant-on-time (COT) control | Adjusts tON per cycle based on ISNS and ZCD timing; maintains high power factor (>0.9) across universal AC input range |
| Critical-conduction-mode (CRM) with ZCD | Enables valley switching to minimize turn-on loss and EMI; supports quasi-resonant operation without external resonant tank |
| Programmable switch turn-on delay | Single RDLY resistor sets delay between ZCD trigger and GATE activation; allows tuning for transformer parasitics and MOSFET CDS |
| Integrated protection suite | Includes cycle-by-cycle OCP, VCC UVLO/OVP, ZCD OVP, output open/short-circuit detection, and thermal shutdown with 20°C hysteresis |
Applications
| Residential LED Lamps | Solid-State Lighting Drivers |
|---|---|
Use Scenario: A19, PAR30/38, and GU10 retrofit lamps operating directly from 85–265VAC mains. IC Role / Device Role / Timing Role: Primary-side controller managing CRM flyback topology with PFC; regulates LED current without secondary feedback. Use Value: Enables compact, cost-effective, CE-compliant lamp designs meeting IEC 61000-3-2 Class C harmonic limits. |
Use Scenario: Commercial downlights and track lighting systems requiring high-efficiency, low-EMI LED drivers. IC Role / Device Role / Timing Role: Adaptive COT controller synchronizing MOSFET turn-on to transformer valley points; manages tON/tOFF dynamically. Use Value: Delivers >90% system efficiency and <10% LED current ripple while eliminating optocoupler aging and drift. |
| Universal-Line LED Ballasts | Isolated AC-DC LED Power Supplies |
Use Scenario: LED tube replacements and integrated fixtures supporting global voltage ranges (100–240VAC). IC Role / Device Role / Timing Role: Off-line controller implementing inherent PFC via CRM; uses ZCD for precise valley detection and DLY for delay tuning. Use Value: Achieves >0.95 power factor and <20% THD without active PFC stage, simplifying design and reducing component count. |
Use Scenario: Medical and industrial LED lighting where reinforced isolation and safety certification are mandatory. IC Role / Device Role / Timing Role: Primary-side sensing controller enabling galvanic isolation; handles startup, regulation, and fault recovery autonomously. Use Value: Supports EN 60601-1 creepage/clearance requirements while maintaining ±3% LED current accuracy over line/load/temp. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar off-line LED controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92314A | Higher ISNS OCP threshold (2.0 V vs. 1.15 V); identical pinout and feature set | Better suited for universal-line designs with higher peak currents; requires adjusted RISNS value | Select TPS92314A when designing for 230VAC nominal input or higher-output-power lamps (>12 W) |
| UCC28810 | Fixed-frequency CRM controller; no adaptive COT; different pinout and compensation architecture | Lacks valley-switching optimization; requires external current sense amplifier and separate PFC stage for high PF | Choose UCC28810 only if legacy design reuse or fixed-frequency EMI compliance is prioritized over efficiency and integration |
Compared with TPS92314AD/NOPB, TPS92314A offers higher OCP headroom for robust universal-line operation but demands recalibration of current-sense scaling, while UCC28810 trades integration and valley-switching efficiency for fixed-frequency predictability and broader vendor support in mature designs.
Availability
TPS92314AD/NOPB is available at Aetrix Electronics and suitable for residential LED lamps, solid-state lighting drivers, and universal-line LED ballasts requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for TPS92314AD/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 delivering analog, embedded processing, and power management solutions with emphasis on energy efficiency and system integration.
The TPS92314AD/NOPB belongs to TI's LED lighting controller product line, designed specifically for cost-sensitive, high-reliability off-line LED drivers that require primary-side regulation, inherent PFC, and robust protection in compact form factors.
FAQ
What is the primary function of the TPS92314AD/NOPB in an LED driver design?
The TPS92314AD/NOPB serves as an off-line primary-side sensing controller for isolated or non-isolated LED drivers. It regulates LED current without secondary feedback by using adaptive constant-on-time control and zero-crossing detection (ZCD) on an auxiliary winding. In the TPS92314AD/NOPB, this enables inherent power factor correction, valley switching, and cycle-by-cycle over-current protection-making it ideal for A19, PAR, and GU10 lamp designs.
How does the TPS92314AD/NOPB achieve power factor correction without a dedicated PFC stage?
The TPS92314AD/NOPB achieves high power factor (>0.9) through critical-conduction-mode (CRM) operation combined with adaptive constant-on-time (COT) control. By sensing the transformer auxiliary winding via ZCD and adjusting tON dynamically per half-cycle, it shapes input current to follow the sinusoidal AC voltage waveform. This eliminates the need for a separate boost-PFC stage, reducing component count and cost in the TPS92314AD/NOPB-based design.
What is the significance of the 1.15V ISNS over-current threshold in the TPS92314AD/NOPB?
The 1.15V ISNS over-current threshold in the TPS92314AD/NOPB defines the peak primary current limit for cycle-by-cycle protection. When the voltage across the external current-sense resistor RISNS reaches 1.15V, the TPS92314AD/NOPB immediately terminates the MOSFET gate drive and extends the off-time to 233 µs. This prevents transformer saturation and MOSFET failure while enabling precise, primary-side-only current regulation without secondary sensing components.
Can the TPS92314AD/NOPB be used in both isolated and non-isolated topologies?
Yes, the TPS92314AD/NOPB supports both isolated (e.g., flyback) and non-isolated (e.g., buck-boost) off-line LED driver topologies. Its ZCD input enables valley switching in isolated configurations using an auxiliary winding, while its ISNS-based current sensing and adaptive COT control adapt seamlessly to non-isolated designs. The TPS92314AD/NOPB's flexibility makes it suitable for diverse lighting applications-from compact retrofit lamps to industrial LED drivers.
What protection features are integrated into the TPS92314AD/NOPB?
The TPS92314AD/NOPB integrates comprehensive protection: cycle-by-cycle over-current (via ISNS), VCC under-voltage lockout (UVLO) and over-voltage protection (OVP), ZCD over-voltage detection, thermal shutdown at 165°C with 20°C hysteresis, and auto-restart behavior during output open/short faults. These features ensure robust operation in real-world lighting environments and eliminate the need for external supervision circuitry in the TPS92314AD/NOPB implementation.
TPS92314AD/NOPB 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
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 13V
- Voltage - Supply (Max):
- 35V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 60kHz ~ 150kHz
- Dimming:
- -
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS92314AD/NOPB FAQ
1.How can I place an order for TPS92314AD/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92314AD/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 TPS92314AD/NOPB reliable?
The price and inventory of TPS92314AD/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92314AD/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92314AD/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92314AD/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92314AD/NOPB?
TPS92314AD/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92314AD/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 TPS92314AD/NOPB?
For technical support, including TPS92314AD/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92314AD/NOPB requirements.
6.How does Aetrix verify that TPS92314AD/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92314AD/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 TPS92314AD/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92314AD/NOPB?
All TPS92314AD/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92314AD/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 TPS92314AD/NOPB part is unused and in its original packaging.
Return procedure for TPS92314AD/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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