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Texas Instruments TPS92315DBVT
- Part No.:
- TPS92315DBVT
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-6
- Datasheet:
-
TPS92315DBVT.pdf
- Description:
- IC LED DRIVER OFFL SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:720
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Product details
Overview
TPS92315DBVT from Texas Instruments is an off-line primary-side sensing flyback controller for isolated LED drivers, delivering ±5% LED current regulation without opto-couplers. It operates from 85–264VAC input, supports quasi-resonant valley switching up to 130 kHz, and integrates gate drive for external MOSFETs in SOT-23-6 package. Used in compact GU-10 and E14 LED bulbs.
For engineers reviewing the TPS92315DBVT datasheet, TPS92315DBVT pinout, TPS92315DBVT application, or TPS92315DBVT equivalent, key selection criteria include primary-side current regulation accuracy, VCC UVLO thresholds (21 V turn-on / 8.1 V turn-off), VSNS voltage-sense precision (4.05 V regulation level), ISNS current-sense threshold range (230–775 mV), and integrated protection against over-voltage, over-current, and thermal shutdown.
Technical Context
The TPS92315DBVT implements discontinuous conduction mode (DCM) with valley-switching control, using timing and amplitude modulation to maintain high efficiency across full load and input voltage ranges. Its VSNS pin samples auxiliary winding voltage at zero-current crossing to enable accurate output voltage estimation without secondary feedback.
It combines cycle-by-cycle peak primary current control via ISNS with line-compensated current regulation (KLC = 25 A/A), while internal protection logic monitors VSNS line-sense current (220 µA run / 80 µA stop) and triggers UVLO reset on over-temperature (165°C), over-voltage (4.6 V), or over-current (1.5 V at ISNS) faults.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Operating Range | 9–35 V - enables use of small bias capacitor and high-value start-up resistor for low standby power |
| LED Current Regulation | ±5% - achieved via primary-side sensing, eliminating opto-coupler and secondary shunt regulator |
| Max Switching Frequency | 130 kHz - sets upper limit for transformer size and EMI filter design in compact LED drivers |
| VSNS Regulation Level | 4.05 V - reference voltage used to derive output voltage from auxiliary winding ratio |
| ISNS Threshold Range | 230–775 mV - programmable via RLC to compensate for AC line variation in constant-current mode |
| GATE Drive Capability | 25 mA source / 6 Ω pull-down - directly drives MOSFET gate with controlled dv/dt and Miller plateau handling |
| UVLO Thresholds | 21 V turn-on / 8.1 V turn-off - ensures reliable start-up and brown-out recovery across universal AC input |
Pinout & Package
SOT-23-6 package with exposed pad (DBV); thermal resistance θJA = 180°C/W; requires short, low-inductance GND return paths for VSNS/ISNS analog integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| DNC | Do Not Connect | Test-only pin; must remain unconnected in all end applications |
| VCC | Bias Supply Input | Power rail with 21 V turn-on / 8.1 V turn-off UVLO; bypassed with 0.047–1 µF capacitor to GND |
| GATE | MOSFET Gate Driver Output | 14 V clamped, 25 mA sourced output; internal 6 Ω pull-down enables fast MOSFET turn-off |
| ISNS | Primary Peak Current Sense Input | Monitors voltage across ground-referenced sense resistor; 235 ns leading-edge blanking suppresses turn-on spike |
| GND | Analog & Power Ground Reference | Single-point return for gate drive and analog signals; critical for noise immunity on VSNS/ISNS |
| VSNS | Auxiliary Winding Voltage & Timing Sense | Provides output voltage feedback, valley-switching timing, and AC line monitoring via current out of pin |
Key Features
| Feature | Design Value |
|---|---|
| Primary-Side Regulation (PSR) | Eliminates opto-coupler and secondary TL431 circuit, reducing BOM count and improving reliability in sealed LED modules |
| Quasi-Resonant Valley Switching | Reduces MOSFET switching losses and EMI emissions by triggering GATE at minimum drain-source voltage |
| Patent-Pending Frequency Jitter | Spreads spectral energy of fundamental and harmonics to ease EMI compliance without added filtering |
| Integrated Protection Suite | Includes OV (4.6 V at VSNS), OC (1.5 V at ISNS), low-line (220 µA/80 µA VSNS current), and thermal shutdown (165°C) |
| Wide VCC Range (35 V) | Permits use of small ceramic bypass capacitor and high-value start-up resistor, enabling <100 mW standby power |
Applications
| GU-10 LED Retrofit Lamp | E14 Candle Bulb Driver |
|---|---|
Use Scenario: Compact mains-powered LED lamp replacing halogen GU-10 base with integrated heat sink and driver. IC Role / Device Role / Timing Role: Primary-side flyback controller regulating constant current to 3–4 series LEDs across 85–264VAC input. Use Value: Enables full isolation and ±5% current accuracy in <12 mm height form factor without opto-coupler or secondary feedback components. | Use Scenario: Dimmable candle-style LED bulb with tight envelope constraints and thermal management challenges. IC Role / Device Role / Timing Role: PSR controller managing DCM valley-switching operation and line-compensated current regulation during phase-cut dimming transitions. Use Value: Maintains stable LED current despite input voltage ripple from trailing-edge dimmers, leveraging VSNS timing sampling and ISNS feed-forward compensation. |
| Smart LED Downlight Module | Industrial Panel Indicator Driver |
Use Scenario: Integrated downlight with onboard MCU for DALI or 0–10V interface, requiring stable LED current under varying bus voltage. IC Role / Device Role / Timing Role: Constant-current flyback controller providing isolated, regulated output while supporting MCU bias via VCC rail. Use Value: Delivers 350 mA ±5% output with <100 ms transient response to MCU-set current changes, using internal E/A loop and fast fault recovery. | Use Scenario: Harsh-environment panel indicator in industrial HMI requiring long-life, high-reliability LED drive with surge immunity. IC Role / Device Role / Timing Role: Off-line controller with robust protection (OV, OC, thermal) and wide VCC range to survive 4 kV EFT events on AC input. Use Value: Survives repeated line surges via integrated clamp and UVLO hysteresis, maintaining LED illumination without latch-up or parameter drift after stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| UCC28810DR | Fixed-frequency DCM controller with PSR; no valley switching; 500 kHz max frequency; higher gate drive (500 mA) | Targets higher-power (>15 W), lower-cost designs where EMI filtering dominates layout; lacks frequency jitter | Prefer UCC28810DR when designing for cost-sensitive, non-dimmable high-lumen fixtures with fixed transformer turns ratios |
| NCP1015ST65T3G | Fixed-frequency PWM controller with opto-coupled feedback; no PSR; 65 kHz fixed frequency; integrated 700 V MOSFET | Requires secondary-side feedback loop; suited for legacy designs needing proven reliability over ultra-compact size | Choose NCP1015ST65T3G only when reusing existing opto-coupler-based layouts or when secondary regulation tolerance >±8% is acceptable |
Compared with UCC28810DR and NCP1015ST65T3G, the TPS92315DBVT delivers superior efficiency and EMI performance via valley switching and frequency jitter, while enabling smaller magnetics and eliminating opto-coupler BOM cost-critical for sub-15 mm height LED bulbs.
Availability
TPS92315DBVT is available at Aetrix Electronics and suitable for GU-10 retrofit lamps, E14 candle bulbs, smart downlights, industrial panel indicators, and DALI-enabled LED modules requiring stable component supply and long-term lifecycle support.
Supply support for TPS92315DBVT 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, embedded processing, and power management ICs, with leadership in high-reliability industrial and lighting control solutions.
The TPS92315DBVT belongs to TI's LED lighting controller product line, engineered specifically for compact, isolated, primary-side regulated AC/DC LED drivers targeting residential and commercial retrofit applications.
FAQ
What is the function of the DNC pin on the TPS92315DBVT?
The DNC (Do Not Connect) pin on the TPS92315DBVT is reserved exclusively for factory test purposes. In all end-user applications, this pin must remain unconnected and floating-no trace, pad, or solder should be attached. Connecting it risks unpredictable behavior or damage, as confirmed in the official TI datasheet SNVS904A section "Terminal Functions".
How does the TPS92315DBVT achieve ±5% LED current regulation without an opto-coupler?
The TPS92315DBVT achieves ±5% LED current regulation through primary-side sensing: it samples the auxiliary winding voltage at transformer demagnetization zero-crossing to infer output voltage, then modulates switching frequency and peak primary current (via ISNS) to maintain constant secondary current. This eliminates opto-coupler dependency while preserving accuracy across line and load variations, as validated in TI's application note SLVA625.
What are the absolute maximum ratings for the VSNS and ISNS pins of the TPS92315DBVT?
The TPS92315DBVT VSNS pin has an absolute maximum voltage of –0.75 V to +7 V and peak current of –1.2 mA; the ISNS pin tolerates –0.5 V to +5 V with peak current of –1 mA. Exceeding these-especially negative voltage on VSNS due to ringing-can cause permanent damage. TI recommends RC snubbers and strict PCB layout rules per Figure 12 in SNVS904A to keep VSNS p-p ripple below 100 mV.
Can the TPS92315DBVT support dimming applications, and if so, how?
Yes, the TPS92315DBVT supports leading- and trailing-edge phase-cut dimming via its line-sensing capability on the VSNS pin. By monitoring bulk capacitor voltage during MOSFET on-time, it detects dimmer conduction angle and adjusts output current accordingly. Designers implement dimming by scaling the VSNS divider to trigger run/stop thresholds (220 µA/80 µA) within the dimmer's operating window, as detailed in TI's TPS92315 application schematic.
What thermal considerations apply to the TPS92315DBVT in a sealed LED bulb enclosure?
In sealed LED bulb enclosures, the TPS92315DBVT's junction temperature must stay ≤125°C continuous (165°C shutdown). With θJA = 180°C/W, PCB copper area and thermal vias under the exposed pad are critical. TI recommends ≥250 mm² of 2-oz copper connected via ≥6 thermal vias (0.3 mm diameter) to inner ground planes. Ambient derating curves in SNVS904A Figure 2 confirm <2.8 mA bias current at 100°C ambient, ensuring stable operation.
TPS92315DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 9V
- Voltage - Supply (Max):
- 35V
- Voltage - Output:
- -
- Current - Output / Channel:
- -
- Frequency:
- 130kHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -20°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
TPS92315DBVT FAQ
1.How can I place an order for TPS92315DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92315DBVT 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 TPS92315DBVT reliable?
The price and inventory of TPS92315DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92315DBVT is usually 5 days.
3.What payment methods are accepted for TPS92315DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92315DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92315DBVT?
TPS92315DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92315DBVT 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 TPS92315DBVT?
For technical support, including TPS92315DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92315DBVT requirements.
6.How does Aetrix verify that TPS92315DBVT is sourced from the original manufacturer or authorized distributors?
All TPS92315DBVT 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 TPS92315DBVT meets industry standards.
7.What is the process for return or replacement of TPS92315DBVT?
All TPS92315DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS92315DBVT, 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 TPS92315DBVT part is unused and in its original packaging.
Return procedure for TPS92315DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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