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Texas Instruments TPS92002DGKR
- Part No.:
- TPS92002DGKR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
TPS92002DGKR.pdf
- Description:
- IC LED DRIVER OFFL TRIAC 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,591
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Product details
Overview
TPS92002DGKR from Texas Instruments is a phase-cut TRIAC-dimmable PWM controller for single-stage LED lighting drivers, supporting isolated and non-isolated topologies. It features 15-V UVLO turn-on threshold, 70% maximum duty cycle, 100-kHz switching frequency (with RRTC = 10 kΩ, RRTD = 4.32 kΩ, CCT = 820 pF), 0.4-A source / 0.8-A sink gate driver, and integrated 5-V reference output. It enables residential A19/E26/GU10/MR16 lamp drivers with minimal external components.
For engineers reviewing the TPS92002DGKR datasheet, TPS92002DGKR pinout, TPS92002DGKR application, or TPS92002DGKR equivalent, this page delivers verified technical context, validated pin functions, real-world dimming topology support, and confirmed alternative options for TRIAC-compatible LED driver design.
Technical Context
The TPS92002DGKR implements fixed-frequency current-mode control using an internal oscillator with programmable rise/fall timing via RTC/RTD pins and a timing capacitor (CCT). Its PWM latch resets when the CS pin crosses 1 V, enabling precise primary-side current regulation in flyback or buck configurations.
It integrates full-cycle soft-start via the SS pin (charged by 6-µA internal current source), undervoltage lockout with 15-V turn-on/8.8-V turn-off thresholds, and a totem-pole gate driver optimized for N-channel MOSFETs-capable of 0.4-A sourcing and 0.8-A sinking with <100-ns propagation delay.
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 minimums in TRIAC-dimming systems |
| Max Duty Cycle | 70% - limits conduction time to maintain power factor >0.9 in single-stage off-line designs |
| Oscillator Frequency | 100 kHz - balances EMI suppression and transformer size in residential LED drivers |
| Gate Drive Capability | 0.4-A source / 0.8-A sink - directly drives medium-power MOSFET gates without external buffers |
| Reference Output | 5 V ±2.5% - powers auxiliary circuitry (e.g., microcontroller, optocoupler bias) with ≤2 mV line/load regulation |
| Startup Current | 110 µA - enables operation from high-impedance dimmer leakage paths without pre-bias networks |
| CS Comparator Threshold | 1 V - sets current-sense trip point for primary-side regulation with slope compensation support |
Pinout & Package
VSSOP-8 (DGK) package: 3.0 mm × 3.0 mm body, 1.1 mm max height, 0.65 mm lead pitch, exposed thermal pad (PowerPAD™), RoHS-compliant NiPdAu finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Current Sense Input | Summing node for primary current sense, optocoupler feedback, and slope compensation; includes internal 250-Ω NMOS discharge for leading-edge blanking |
| 2 - SS | Soft-Start Control | Charged by 6-µA internal current source; 0.4–2.0 V range controls duty-cycle ramp-up and enables shutdown below 0.5 V |
| 3 - RTC | Oscillator Timing (Rise) | Connects to RRTC to set positive ramp time; senses CCT voltage at 3.33 V (2/3 VREF) to trigger oscillator discharge phase |
| 4 - RTD | Oscillator Timing (Fall) | Connects to RRTD to set negative ramp time; senses CCT voltage at 1.67 V (1/3 VREF) to trigger oscillator charge phase |
| 5 - GND | Ground Reference | Common return for all analog and power circuits; must be low-inductance connection to minimize noise coupling into CS/SS |
| 6 - GD | Gate Driver Output | Totem-pole output driving N-MOSFET gates; requires ≥3.9 Ω series resistor to limit peak current during fast transitions |
| 7 - VDD | Supply Input | Shunt-regulated at 17.5 V; bypassed with 1-µF ceramic capacitor; supplies internal logic and gate driver |
| 8 - REF | 5-V Reference Output | Buffered 5-V output; requires 0.47-µF ceramic capacitor to GND for stability under load up to 6 mA |
Key Features
| Feature | Design Value |
|---|---|
| TRIAC Phase-Cut Dimming Support | Enables direct interface with standard wall dimmers without auxiliary AC sensing or rectification circuitry |
| Single-Stage Topology Enablement | Integrates PF correction and regulation in one IC, eliminating separate PFC stage for cost-sensitive residential lamps |
| Minimal External Component Count | Requires only two timing resistors, one timing capacitor, one current-sense resistor, and three bypass capacitors for full operation |
| Full-Cycle Soft Start | Prevents inrush current and audible transformer buzz by linearly ramping duty cycle from 0% to 70% over ~10 ms |
| Low Startup Current | 110 µA allows reliable start-up from dimmer-triac leakage currents as low as 100 µA, avoiding false triggering |
Applications
| Residential A19/E26 Integral Lamps | GU10/MR16 Retrofit Bulbs |
|---|---|
|
Use Scenario: Direct replacement of incandescent bulbs in standard E26 sockets with TRIAC-dimmer compatibility. IC Role / Device Role / Timing Role: Primary-side PWM controller regulating LED current in non-isolated buck or isolated flyback topology. Use Value: Eliminates need for secondary-side feedback, reduces BOM count by 4+ components versus optocoupler-based solutions. |
Use Scenario: Compact directional lighting in track heads and recessed downlights with phase-dim capability. IC Role / Device Role / Timing Role: Gate driver and current regulator managing high-side MOSFET in low-side buck configuration. Use Value: 1.1-mm package height enables fit into MR16's tight 12-mm height constraint while maintaining 70% efficiency. |
| Wall Sconces & Pathway Lighting | Architectural Wall Washing |
|
Use Scenario: Outdoor-rated enclosed fixtures requiring wide input range (90–277 VAC) and smooth dimming down to 5%. IC Role / Device Role / Timing Role: Core controller in isolated flyback with TRIAC interface and active PF correction. Use Value: 15-V UVLO prevents flicker during dimmer zero-crossing dropout; 100-kHz switching minimizes audible noise. |
Use Scenario: Linear LED strips mounted behind coves or cornices, powered from centralized 120/277-VAC lines. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller synchronizing multiple drivers via shared RTC/RTD timing network. Use Value: Programmable oscillator allows synchronized switching across multiple TPS92002DGKR units to suppress beat frequencies. |
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 |
|---|---|---|---|
| TPS92001DGKR | 10-V UVLO turn-on (vs. 15 V); identical pinout, timing, and gate drive specs | Better suited for lower-input-voltage DC-fed or universal-input designs where dimmer hold current is marginal | Select TPS92001DGKR when operating from 90–130 VAC inputs or with legacy dimmers exhibiting higher leakage. |
| NCP1014DR2G | Fixed 65-kHz frequency; no TRIAC-dimming interface; integrated 700-V MOSFET; no 5-V reference output | Targets cost-sensitive non-dimmable LED drivers; requires external feedback and lacks soft-start programmability | Choose NCP1014DR2G only for non-dimming, low-BOM-count applications where TRIAC compatibility is unnecessary. |
Compared with TPS92002DGKR, TPS92001DGKR offers lower UVLO for broader dimmer compatibility but reduced margin against brownout; NCP1014DR2G eliminates external MOSFETs but forfeits dimming support and precision reference capability.
Availability
TPS92002DGKR is available at Aetrix Electronics and suitable for residential LED lamp drivers, architectural wall washers, and pathway lighting systems requiring stable component supply, long-lifecycle assurance, and consistent dimming performance across production batches.
Supply support for TPS92002DGKR 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 reliability validation.
The TPS9200x family was designed specifically for cost-effective, single-stage, TRIAC-dimmable LED drivers targeting residential and commercial retrofit lamps-prioritizing dimmer interoperability, minimal external parts, and thermal robustness in compact form factors.
FAQ
What is the UVLO hysteresis of the TPS92002DGKR?
The TPS92002DGKR has a 6.2-V UVLO hysteresis, with a 15-V turn-on threshold and an 8.8-V turn-off threshold. This wide hysteresis prevents oscillatory startup near the dimmer's minimum conduction voltage and ensures stable operation during AC line sags. The hysteresis is internally fixed and not user-adjustable. The TPS92002DGKR datasheet confirms these values under Recommended Operating Conditions.
Can the TPS92002DGKR drive a high-side MOSFET directly?
No, the TPS92002DGKR gate driver is optimized for low-side or source-follower configurations and cannot directly drive a high-side N-channel MOSFET due to lack of bootstrap or floating supply capability. It supports only grounded-source topologies like non-isolated buck or flyback with low-side switch. For high-side drive, an external level-shifter or dedicated high-side driver is required. This limitation is inherent to the TPS92002DGKR architecture.
What timing components set the oscillator frequency of the TPS92002DGKR?
The TPS92002DGKR oscillator frequency is set by external components: RRTC (pin 3), RRTD (pin 4), and CCT (timing capacitor from RTD to GND). With RRTC = 10 kΩ, RRTD = 4.32 kΩ, and CCT = 820 pF, the nominal frequency is 100 kHz. Equation 3 in the TPS92002DGKR datasheet defines fOSC = 0.74 / [CCT × (RRTC + RRTD + 54 pF)]. All three components must be placed close to the IC for noise immunity.
Does the TPS92002DGKR include built-in overvoltage protection?
The TPS92002DGKR does not include active overvoltage protection on its VDD pin beyond the internal 17.5-V shunt clamp. This clamp protects the IC from transient overvoltage but is not intended as system-level OVP. External circuitry-such as a Zener diode or TVS-must be added at the input to safeguard against sustained overvoltage events exceeding 19 V (absolute max rating). The TPS92002DGKR datasheet specifies VDD absolute max as 19 V.
How is soft-start duration controlled in the TPS92002DGKR?
Soft-start duration in the TPS92002DGKR is determined by the external capacitor on the SS pin and the internal 6-µA current source. A typical 100-nF capacitor yields ~17-ms ramp from 0.4 V to 2.0 V, corresponding to full-duty-cycle enablement. The SS pin voltage controls both initial inhibition (below 0.5 V) and progressive duty-cycle increase (1–2 V range). This behavior is explicitly defined in the TPS92002DGKR PIN FUNCTIONS table.
TPS92002DGKR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
TPS92002DGKR FAQ
1.How can I place an order for TPS92002DGKR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92002DGKR 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 TPS92002DGKR reliable?
The price and inventory of TPS92002DGKR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92002DGKR is usually 5 days.
3.What payment methods are accepted for TPS92002DGKR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92002DGKR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92002DGKR?
TPS92002DGKR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92002DGKR 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 TPS92002DGKR?
For technical support, including TPS92002DGKR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92002DGKR requirements.
6.How does Aetrix verify that TPS92002DGKR is sourced from the original manufacturer or authorized distributors?
All TPS92002DGKR 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 TPS92002DGKR meets industry standards.
7.What is the process for return or replacement of TPS92002DGKR?
All TPS92002DGKR units undergo pre-shipment inspection (PSI). If there is an issue with TPS92002DGKR, 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 TPS92002DGKR part is unused and in its original packaging.
Return procedure for TPS92002DGKR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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