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Texas Instruments TPS92314D/NOPB
- Part No.:
- TPS92314D/NOPB
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92314D/NOPB.pdf
- Description:
- IC LED DRIVER OFFL 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,861
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Product details
Overview
TPS92314D/NOPB from Texas Instruments is an off-line primary-side sensing LED controller for high-power lighting, implementing adaptive constant-on-time (COT) control in critical-conduction-mode (CRM) with inherent power factor correction (PFC). It regulates LED current without secondary-side sensing, supports 85–132 VAC input, delivers up to 350 mA output current, and integrates zero-crossing detection (ZCD), programmable delay (DLY), and cycle-by-cycle overcurrent protection at 1.15 V on ISNS.
For engineers reviewing the TPS92314D/NOPB datasheet, TPS92314D/NOPB pinout, TPS92314D/NOPB application, or TPS92314D/NOPB equivalent, this device is selected for cost-sensitive, isolated flyback LED drivers requiring high PF (>0.9), valley-switching efficiency, and minimal external components in residential A19/GU10 lamps and solid-state lighting systems.
Technical Context
The TPS92314D/NOPB operates in CRM using ZCD-based valley switching, where the GATE driver turns on after a programmable delay following zero-current detection on the auxiliary winding. Its adaptive COT algorithm dynamically adjusts tON (311–900 ns min/max) based on primary inductor peak current and secondary discharge time, enabling stable regulation across universal AC line variations without optocouplers.
Protection is implemented via dedicated pins and internal thresholds: ISNS monitors primary current with 1.15 V OCP trigger, ZCD detects auxiliary voltage for timing and open-circuit OVP (3.9–4.7 V), DLY sets turn-on delay via external resistor, and thermal shutdown activates at 165°C with 20°C hysteresis - all coordinated through integrated bias, reference, and logic blocks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC UVLO Threshold | 22.5–28.3 V rising; enables startup only when bulk capacitor reaches sufficient voltage for reliable operation. |
| ISNS OCP Threshold | 1.07–1.22 V; sets precise primary-side current limit to prevent transformer saturation and MOSFET overstress. |
| ZCD Arming Threshold | 1.04–1.42 V; defines minimum auxiliary voltage level required to validate zero-crossing detection before gate turn-on. |
| GATE Drive Voltage | 7.6–9.4 V high / 85–125 mV low; provides robust MOSFET gate drive with fast rise/fall times (94 ns / 16 ns) for low switching loss. |
| TON-MIN / TON-MAX | 311–900 ns / 27–61 µs; defines adaptive on-time window that maintains CRM operation while accommodating line/load transients. |
| Thermal Shutdown | 165°C activation; halts switching and discharges CVCC until VCC drops below UVLO, enabling automatic restart after cooling. |
| Package | 8-pin SOIC (D package); surface-mount compatible with standard reflow profiles and thermal pad layout for 162°C/W θJA. |
Pinout & Package
TPS92314D/NOPB is housed in an 8-pin SOIC (D) package with exposed thermal pad (not electrically connected), rated for –40°C to +125°C junction temperature and 260°C solder reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC | Power supply input | Supplies internal circuitry; requires 10–20 µF bypass capacitor to PGND for stable startup and noise 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 | Accepts scaled auxiliary winding voltage; triggers valley switching and enables open-circuit OVP via VZCD-OVP threshold. |
| COMP | Error amplifier output | Drives external RC compensation network to stabilize average LED current loop; sourced by 27 µA internal current. |
| DLY | Delay control input | Sets gate turn-on delay (2×tDLY) via external resistor to minimize EMI and switching loss at resonance frequency. |
| PGND | Power ground return | Low-impedance return for GATE driver and ISNS current sense path; connects directly to MOSFET source and RISNS ground. |
| ISNS | Primary current sense input | Monitors voltage across RISNS; initiates cycle-by-cycle OCP when ≥1.15 V and forces minimum tON in next cycle. |
| GATE | High-side MOSFET gate driver | Delivers 50 mA sink/source capability; drives external N-channel MOSFET Q1 with controlled slew rate to reduce EMI. |
Key Features
| Feature | Design Value |
|---|---|
| Primary-side LED current regulation | Eliminates optocoupler and secondary-side feedback components, reducing BOM count and improving reliability in isolated designs. |
| Adaptive constant-on-time (COT) control | Adjusts tON in real time based on LP peak current and LS discharge time, maintaining CRM operation across 85–132 VAC input range. |
| Inherent PFC in CRM mode | Achieves >0.9 power factor without active PFC stage, meeting IEC 61000-3-2 Class C requirements for lighting equipment. |
| Programmable ZCD-based delay | Enables valley switching with tunable dead time (via RDLY) to minimize switching loss and EMI in resonant flyback topologies. |
| Integrated protection suite | Includes cycle-by-cycle OCP (1.15 V), ZCD-based OVP, VCC UVLO/OVP, and thermal shutdown - all with auto-restart behavior. |
Applications
| Residential LED Lamps | Solid-State Lighting |
|---|---|
Use Scenario: Driving 7-series LED strings (21 V, 350 mA) in A19/E26 retrofit bulbs operating from 85–132 VAC. IC Role / Device Role / Timing Role: Primary-side controller managing CRM flyback topology with ZCD-triggered valley switching and adaptive COT. Use Value: Enables compact, low-cost design with no optocoupler, achieving >85% efficiency and >0.9 PF without additional PFC circuitry. |
Use Scenario: Powering PAR30/38 directional lamps with wide input range and stringent thermal constraints in enclosed fixtures. IC Role / Device Role / Timing Role: Off-line LED driver IC providing primary-side current regulation, programmable delay timing, and thermal foldback. Use Value: Delivers stable LED current under varying ambient temperatures (–40°C to +125°C TJ) with built-in 165°C thermal shutdown and 20°C hysteresis. |
| GU10 Spotlights | Isolated Flyback LED Drivers |
Use Scenario: High-brightness GU10 lamps requiring high PF, low THD, and compliance with EN 61000-3-2 Class C. IC Role / Device Role / Timing Role: CRM controller executing zero-voltage switching via ZCD signal from auxiliary winding. Use Value: Reduces EMI signature and improves system efficiency by synchronizing MOSFET turn-on with valley of drain voltage waveform. |
Use Scenario: General-purpose isolated LED drivers for commercial lighting where layout simplicity and component count reduction are critical. IC Role / Device Role / Timing Role: Integrated controller handling gate drive, current sensing, compensation, and protection in single 8-pin SOIC. Use Value: Lowers design risk with built-in OCP, OVP, UVLO, and thermal protection - all with defined thresholds and auto-restart recovery. |
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 | OCP threshold is 1.90–2.10 V (vs. 1.07–1.22 V), optimized for universal 90–265 VAC input with higher primary current headroom. | Better suited for 230 VAC mains applications; not drop-in compatible due to different OCP setting and startup behavior. | Select TPS92314A only if designing for global input range and higher power levels; TPS92314D/NOPB remains optimal for 85–132 VAC cost-sensitive lamps. |
| NCP1014DR2G | Fixed-frequency PWM controller (65 kHz) without ZCD or adaptive COT; requires optocoupler feedback and external PFC stage. | Lacks inherent PFC and primary-side regulation; used in lower-performance, non-compliant lighting where PF >0.9 is not required. | Choose only if legacy design reuse is needed; TPS92314D/NOPB offers superior PF, efficiency, and integration for new residential LED lamp designs. |
Compared with TPS92314A, TPS92314D/NOPB provides tighter OCP matching for low-line 85–132 VAC operation and lower system cost, while NCP1014DR2G lacks CRM, ZCD, and PFC - requiring more external components and failing modern PF regulations.
Availability
TPS92314D/NOPB is available at Aetrix Electronics and suitable for residential LED lamps (A19, GU10), solid-state lighting modules, and isolated flyback LED drivers requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TPS92314D/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 energy-efficient power conversion.
The TPS92314D/NOPB belongs to TI's off-line LED controller product line, designed specifically for cost-sensitive, high-PF, isolated flyback lighting applications where primary-side sensing eliminates optocouplers and simplifies certification.
FAQ
What is the primary function of the TPS92314D/NOPB in an LED driver circuit?
The TPS92314D/NOPB serves as an off-line primary-side sensing controller for isolated flyback LED drivers. It regulates LED current without secondary-side feedback by using adaptive constant-on-time control synchronized to zero-crossing detection on the auxiliary winding. This enables high power factor, valley switching, and inherent PFC - all within a single 8-pin SOIC package. The TPS92314D/NOPB directly drives the external MOSFET via its GATE pin and monitors primary current through the ISNS pin.
How does the TPS92314D/NOPB achieve power factor correction without an external PFC stage?
The TPS92314D/NOPB achieves inherent power factor correction by operating in critical conduction mode (CRM) with adaptive constant-on-time control. Its ZCD-based valley switching ensures the MOSFET turns on precisely at the current zero-crossing point of the transformer secondary, resulting in sinusoidal input current draw that naturally meets IEC 61000-3-2 Class C requirements. No boost converter or active PFC controller is needed - the TPS92314D/NOPB implements PFC through timing and control architecture alone.
What is the significance of the 1.15 V overcurrent protection threshold on the ISNS pin of the TPS92314D/NOPB?
The 1.15 V overcurrent protection (OCP) threshold on the ISNS pin of the TPS92314D/NOPB sets the precise primary-side current limit for cycle-by-cycle protection. When the voltage across the external current-sense resistor RISNS exceeds this threshold, the controller immediately pulls GATE low, extends OFF time to 233 µs, discharges CCOMP, and forces minimum ON time in the next cycle - preventing transformer saturation and MOSFET failure. This fixed 1.15 V threshold makes RISNS selection deterministic and repeatable across production units.
Can the TPS92314D/NOPB be used in non-isolated buck-derived LED drivers?
No - the TPS92314D/NOPB is specifically designed for isolated flyback topologies requiring ZCD input from an auxiliary winding. Its control architecture relies on detecting zero-current transitions in the secondary winding via the ZCD pin, which is not present or functional in non-isolated buck or buck-boost configurations. Attempting to use the TPS92314D/NOPB in non-isolated designs will result in unstable regulation or failure to start, as the ZCD signal is fundamental to its CRM timing and OVP functionality.
What are the key differences between TPS92314D/NOPB and TPS92314A?
The TPS92314D/NOPB and TPS92314A share identical pinout and core architecture but differ critically in overcurrent protection: TPS92314D/NOPB uses a 1.07–1.22 V ISNS OCP threshold optimized for 85–132 VAC input, while TPS92314A uses 1.90–2.10 V for universal 90–265 VAC. This difference affects RISNS selection, startup behavior, and maximum deliverable power. They are not pin-compatible replacements - substituting one for the other requires redesigning current-sense and auxiliary winding networks.
TPS92314D/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
TPS92314D/NOPB FAQ
1.How can I place an order for TPS92314D/NOPB through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92314D/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 TPS92314D/NOPB reliable?
The price and inventory of TPS92314D/NOPB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92314D/NOPB is usually 5 days.
3.What payment methods are accepted for TPS92314D/NOPB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92314D/NOPB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92314D/NOPB?
TPS92314D/NOPB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92314D/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 TPS92314D/NOPB?
For technical support, including TPS92314D/NOPB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92314D/NOPB requirements.
6.How does Aetrix verify that TPS92314D/NOPB is sourced from the original manufacturer or authorized distributors?
All TPS92314D/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 TPS92314D/NOPB meets industry standards.
7.What is the process for return or replacement of TPS92314D/NOPB?
All TPS92314D/NOPB units undergo pre-shipment inspection (PSI). If there is an issue with TPS92314D/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 TPS92314D/NOPB part is unused and in its original packaging.
Return procedure for TPS92314D/NOPB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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