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Texas Instruments TPS92002DGK
- Part No.:
- TPS92002DGK
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS92002DGK.pdf
- Description:
- IC LED DRIVER OFFL DIM 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:18,720
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Product details
Overview
TPS92002DGK from Texas Instruments is a phase-cut TRIAC-dimmable LED lighting PWM controller in an 8-pin MSOP package, featuring 15-V UVLO turn-on threshold, 70% maximum duty cycle, 100-kHz fixed-frequency current-mode operation, 0.4-A source/0.8-A sink gate driver, and integrated 5-V reference output. It enables single-stage isolated or non-isolated flyback and buck LED drivers for residential A19/E26/GU10/MR16 lamps.
For engineers reviewing the TPS92002DGK datasheet, TPS92002DGK pinout, TPS92002DGK application, or TPS92002DGK equivalent, this page delivers verified technical context, validated pin functions, real-world dimming interface implementation details, thermal performance under 105°C junction operation, and direct alternative part comparisons for TRIAC-dimmable LED driver design.
Technical Context
The TPS92002DGK implements fixed-frequency current-mode PWM control with internal oscillator timing set by external RTC/RTD resistors and CCT capacitor, delivering precise 100-kHz switching (±10%) across –40°C to +105°C. Its CS pin sums primary current sense and slope compensation against a 1-V threshold to reset the PWM latch, enabling accurate peak-current regulation.
UVLO is latched with 15-V turn-on and 8.8-V turn-off (6.2-V hysteresis), ensuring safe startup and shutdown in off-line AC applications. The GD driver delivers 0.4-A source / 0.8-A sink capability into N-channel MOSFET gates, with 35-ns rise and 18-ns fall times into 1-nF load, supporting fast-switching LED power stages.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Turn-On Threshold | 15 V - Ensures reliable startup only after input rail stabilizes above dimmer-conducted minimum voltage. |
| Max Duty Cycle | 70% - Limits conduction time per cycle to maintain stable current regulation in wide-input dimming ranges. |
| Oscillator Frequency | 100 kHz - Fixed frequency enables predictable EMI filtering and transformer design for Class B compliance. |
| Gate Drive Capability | 0.4-A source / 0.8-A sink - Directly drives medium-power MOSFETs without external buffer, reducing BOM count. |
| Reference Output | 5.0 V ±2.5% - Powers auxiliary circuitry (e.g., microcontroller, optocoupler bias) with <2 mV line/load regulation. |
| Startup Current | 110 µA - Enables low-loss high-impedance startup networks compatible with TRIAC trailing-edge dimmers. |
| Operating Junction Temp | –40°C to +105°C - Validated for enclosed residential lamp environments with minimal heatsinking. |
Pinout & Package
TPS92002DGK uses an 8-pin VSSOP (DGK) package, 3.0 mm × 3.0 mm × 1.1 mm height, with exposed thermal pad for enhanced PCB heat dissipation. Pin 1 index area located at top-left corner (viewed top-down); pin numbering follows standard counter-clockwise sequence.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS (Pin 1) | Current Sense Summing Node | Accepts primary-side current sense signal and slope compensation; internal 1-V comparator resets PWM latch on threshold crossing. |
| SS (Pin 2) | Soft-Start Timing Input | Charged by internal 6-µA current source; 0.4–2.0 V ramp controls duty-cycle ramp-up during startup to limit inrush. |
| RTC (Pin 3) | Oscillator Rise-Time Control | Connects to timing resistor setting positive ramp slope of internal oscillator capacitor (CCT); defines 70% max duty cycle timing. |
| RTD (Pin 4) | Oscillator Fall-Time Control | Connects to timing resistor setting negative ramp slope of CCT; works with RTC to fix 100-kHz oscillator frequency. |
| GND (Pin 5) | Power & Signal Reference Ground | Common return for all internal circuits; must be low-inductance connection to minimize noise coupling into CS/SS pins. |
| GD (Pin 6) | Gate Driver Output | Totem-pole N-channel output driving external MOSFET gate; 0.8-V saturation ensures full enhancement at 12-V VDD. |
| VDD (Pin 7) | Supply Input with Clamp | Shunt-regulated at 17.5 V; accepts 21-V max input; bypassed with 1-µF ceramic capacitor for stable gate drive supply. |
| REF (Pin 8) | 5-V Buffered Reference Output | Stable 5.0-V source for optocoupler bias or MCU supply; requires 0.47-µF ceramic bypass to GND for ripple suppression. |
Key Features
| Feature | Design Value |
|---|---|
| TRIAC Phase-Cut Dimming Support | Enables direct integration with legacy wall dimmers without additional active front-end circuitry. |
| Full-Cycle Soft Start | Prevents inrush current and audible transformer whine by linearly ramping duty cycle from 0% to 70% over ~10 ms. |
| Integrated 5-V Reference | Eliminates need for external LDO; supports optocoupler feedback and low-power microcontrollers with <2-mV regulation error. |
| Low 110-µA Startup Current | Permits use of high-value startup resistors (>1 MΩ), minimizing standby power loss in energy-efficient lamp designs. |
| Leading Edge Blanking via CS | Internal 250-Ω NMOS discharges external RC filter during PWM off-time, improving noise immunity without extra components. |
Applications
| Residential A19/E26 Integral Lamp | GU10/MR16 Directional Lamp |
|---|---|
|
Use Scenario: Compact LED retrofit bulb replacing incandescent A19 with TRIAC dimmer compatibility. IC Role / Device Role / Timing Role: Primary PWM controller regulating constant current through series-connected LEDs using flyback topology. Use Value: Single-stage design eliminates PFC stage, reducing size/cost while meeting ENERGY STAR® THD <20% at 100% load. |
Use Scenario: Low-profile directional lamp (GU10/MR16) requiring high PF (>0.9) and smooth 10–100% dimming range. IC Role / Device Role / Timing Role: Current-mode controller implementing valley-switching flyback with optocoupler feedback for tight regulation. Use Value: 70% max duty cycle and 100-kHz switching enable small magnetics and >90 lm/W efficacy in thermally constrained housings. |
| Wall Sconce Lighting | Architectural Wall Washing |
|
Use Scenario: Indoor wall-mounted sconce with integrated driver and TRIAC dimming for hospitality environments. IC Role / Device Role / Timing Role: Non-isolated buck controller driving mid-power LEDs with analog dimming interface derived from TRIAC phase angle. Use Value: 15-V UVLO prevents flicker during low-phase-angle dimming; 5-V REF powers dimming interface IC with no extra regulator. |
Use Scenario: Linear wall-washer fixture requiring uniform illumination and seamless 1–100% dimming without color shift. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller managing multiple parallel LED strings via secondary-side sensing. Use Value: 0.4-A/0.8-A gate drive supports discrete MOSFETs for scalable current up to 1.5 A; soft start prevents mechanical vibration in long fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED lighting PWM controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS92001DGK | 10-V UVLO turn-on (vs. 15 V), identical pinout, same 70% DMAX and 100-kHz oscillator. | Better suited for lower-input-voltage DC-fed or universal-input designs where early startup is required. | Select TPS92001DGK when operating from 12-V nominal rails or needing earlier activation below 15 V. |
| NCP1014DR2G | Fixed-frequency current-mode controller with integrated 700-V MOSFET; no 5-V REF or TRIAC-specific soft-start logic. | Targets cost-sensitive non-dimmable AC/DC LED drivers; lacks native phase-cut dimming support and external dimming interface. | Choose NCP1014DR2G only for non-dimmable, single-chip flyback designs where BOM reduction outweighs dimming capability. |
Compared with TPS92002DGK, TPS92001DGK offers lower UVLO for wider input compatibility but reduced margin against TRIAC dropout; NCP1014DR2G integrates power switch but sacrifices dimming features and reference output-making TPS92002DGK optimal for TRIAC-dimmable residential LED drivers requiring precision control and auxiliary power.
Availability
TPS92002DGK is available at Aetrix Electronics and suitable for residential LED lamp development, architectural lighting systems, and TRIAC-dimmable wall sconce drivers requiring stable component supply, consistent thermal performance, and long-lifecycle availability.
Supply support for TPS92002DGK 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 lighting solutions.
The TPS9200x family was designed specifically for cost-effective, single-stage TRIAC-dimmable LED drivers targeting residential and commercial retrofit lamps-prioritizing dimming compatibility, thermal robustness, and minimal external component count.
FAQ
What is the UVLO hysteresis of the TPS92002DGK?
The TPS92002DGK has a 6.2-V UVLO hysteresis, with 15-V turn-on and 8.8-V turn-off thresholds. This wide hysteresis prevents oscillatory startup near the dimmer's minimum conduction voltage and ensures clean shutdown during deep dimming. The specification is validated across –40°C to +105°C and appears in the Electrical Characteristics table of the SLUSA24A datasheet for TPS92002DGK.
Can the TPS92002DGK drive a MOSFET directly without a gate driver IC?
Yes, the TPS92002DGK can drive N-channel MOSFETs directly: its GD pin delivers 0.4-A source and 0.8-A sink current with 35-ns rise and 18-ns fall times into 1-nF load. A minimum 3.9-Ω series gate resistor is recommended per the datasheet to limit peak current and suppress ringing. This capability eliminates external buffers in most ≤30-W LED driver designs using TPS92002DGK.
What is the purpose of the SS pin on the TPS92002DGK?
The SS (Soft-Start) pin on the TPS92002DGK controls startup behavior via an internal 6-µA current source charging an external capacitor. As SS ramps from 0.4 V to 2.0 V, the output duty cycle increases linearly from 0% to 70%, preventing inrush current and transformer saturation. If SS drops below 0.5 V, the GD output is inhibited-enabling external fault shutdown. This function is fully documented in the Application Information section of the TPS92002DGK datasheet.
Does the TPS92002DGK support both isolated and non-isolated topologies?
Yes, the TPS92002DGK supports both isolated (e.g., flyback) and non-isolated (e.g., low-side buck) topologies, as confirmed in the device description and Figure 3–4 of the SLUSA24A datasheet. Its current-mode architecture, optocoupler-compatible CS pin, and flexible gate drive allow implementation in either configuration-commonly used in isolated A19 lamps and non-isolated GU10/MR16 designs using TPS92002DGK.
How does the TPS92002DGK achieve TRIAC dimming compatibility?
The TPS92002DGK achieves TRIAC dimming compatibility through three integrated features: (1) low 110-µA startup current enabling high-impedance startup networks that sustain TRIAC holding current, (2) full-cycle soft start preventing misfiring during phase-angle transitions, and (3) UVLO hysteresis tuned to avoid dropout during minimum conduction angles. These are explicitly cited in the FEATURES and APPLICATIONS sections of the TPS92002DGK datasheet.
TPS92002DGK Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- AC DC Offline Switcher
- Topology:
- Flyback, Step-Down (Buck)
- Internal Switch(s):
- No
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- -
- Voltage - Supply (Max):
- 21V
- Voltage - Output:
- 5V
- Current - Output / Channel:
- -
- Frequency:
- 100kHz
- Dimming:
- Triac
- Applications:
- Lighting
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
TPS92002DGK FAQ
1.How can I place an order for TPS92002DGK through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92002DGK 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 TPS92002DGK reliable?
The price and inventory of TPS92002DGK are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92002DGK is usually 5 days.
3.What payment methods are accepted for TPS92002DGK?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92002DGK transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92002DGK?
TPS92002DGK orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92002DGK 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 TPS92002DGK?
For technical support, including TPS92002DGK datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92002DGK requirements.
6.How does Aetrix verify that TPS92002DGK is sourced from the original manufacturer or authorized distributors?
All TPS92002DGK 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 TPS92002DGK meets industry standards.
7.What is the process for return or replacement of TPS92002DGK?
All TPS92002DGK units undergo pre-shipment inspection (PSI). If there is an issue with TPS92002DGK, 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 TPS92002DGK part is unused and in its original packaging.
Return procedure for TPS92002DGK:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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