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Texas Instruments TPS92002D
- Part No.:
- TPS92002D
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92002D.pdf
- Description:
- IC LED DRIVER OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:510
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Product details
Overview
TPS92002D from Texas Instruments is a phase-cut TRIAC-dimmable, fixed-frequency current-mode PWM controller for single-stage LED lighting drivers. 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 targets non-isolated buck and isolated flyback topologies in residential A19/E26/GU10 lamps.
For engineers reviewing the TPS92002D datasheet, TPS92002D pinout, TPS92002D application, or TPS92002D equivalent, this page delivers verified functional identity, validated SOIC-8 package mapping, confirmed TRIAC-dimming support with soft-start and slope compensation, real-world UVLO hysteresis (6.2 V), and precise oscillator timing relationships - all critical for dimmable LED driver design validation and BOM selection.
Technical Context
The TPS92002D implements fixed-frequency current-mode control using an internal oscillator with dual-resistor timing (RTC/RTD) and a 1-V current-sense comparator that resets the PWM latch. Its UVLO threshold is set at 15 V (turn-on) with 6.2-V hysteresis, distinguishing it from the TPS92001 (10-V turn-on, 1.65-V hysteresis), enabling higher-input-voltage offline operation.
It integrates a totem-pole gate driver capable of 0.4-A sourcing and 0.8-A sinking, supports full-cycle soft-start via SS pin charging, and provides slope-compensated current sensing through the CS pin with leading-edge blanking. The REF pin delivers a regulated 5-V ±2.5% output (4.75–5.25 V) with ≤2 mV line/load regulation, usable for biasing external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Turn-On Threshold | 15 V - Enables reliable startup in 230-VAC-derived supplies before rectification ripple dips below safe operating level. |
| Maximum Duty Cycle | 70% - Limits peak primary current in flyback designs and prevents transformer saturation under wide input/dimming conditions. |
| Switching Frequency | 100 kHz (typ) - Balances EMI filtering cost and MOSFET switching loss; programmable via RTC/RTD/CCT network. |
| Gate Drive Capability | 0.4-A source / 0.8-A sink - Directly drives N-channel MOSFETs up to ~1 nF gate capacitance with <35 ns rise time. |
| Reference Output | 5.0 V ±2.5% - Stable, low-noise supply for optocoupler bias, microcontroller reset, or auxiliary logic without external regulator. |
| Startup Current | 110 µA (typ) - Minimizes bleed resistor power loss in high-impedance AC-coupled startup circuits. |
| CS Comparator Threshold | 0.95 V - Sets current-sense gain for accurate LED current regulation across temperature and line variations. |
Pinout & Package
TPS92002D is housed in an 8-pin SOIC (D) package (JEDEC MS-012, variation AA), 3.91 mm width, 4.9 mm length, 1.75 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| 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 ramp enables controlled duty-cycle ramp-up and disables output below 0.5 V. |
| 3 - RTC | Oscillator Timing (Rise) | Connects to RRTC to set positive ramp time of internal oscillator; senses CCT voltage at upper threshold (3.33 V). |
| 4 - RTD | Oscillator Timing (Fall) | Connects to RRTD to set negative ramp time; senses CCT voltage at lower threshold (1.67 V); works with RTC for frequency programming. |
| 5 - GND | Power & Signal Ground | Common return for all internal circuits, gate drive, and external decoupling; must be low-inductance connection to PCB ground plane. |
| 6 - GD | Gate Driver Output | Totem-pole output driving external N-MOSFET gate; requires ≥3.9 Ω series resistor to limit peak current and suppress ringing. |
| 7 - VDD | Supply Input | Shunt-regulated at 17.5 V; accepts 21-V max input; bypassed with 1-µF ceramic capacitor directly to GND pin 5. |
| 8 - REF | 5-V Reference Output | Buffered 5-V output (±2.5%) for external bias; requires 0.47-µF ceramic capacitor to GND for stability and noise rejection. |
Key Features
| Feature | Design Value |
|---|---|
| Phase-Cut TRIAC Dimming Support | Enables direct integration with legacy wall dimmers without additional active front-end circuitry; validated in Figures 3 and 4 of SLUSA24A. |
| Full-Cycle Soft Start | Prevents inrush current and audible transformer noise by ramping duty cycle from 0% to 70% over SS pin voltage (1 V → 2 V). |
| Integrated Slope Compensation | Derived from CCT ramp and buffered via external NPN; eliminates subharmonic oscillation in duty cycles >50% without extra components. |
| Low Startup Current | 110 µA typical enables use of high-value, low-power startup resistors (e.g., 1 MΩ) in AC-line-powered applications. |
| Undervoltage Lockout Hysteresis | 6.2 V ensures robust restart after brownout events and prevents erratic operation near UVLO threshold crossing. |
Applications
| Residential LED Lamps | Architectural Wall Washing |
|---|---|
Use Scenario: Driving integral A19, GU10, or MR16 LED lamps directly from 120/230-VAC mains with TRIAC dimmer compatibility. IC Role / Device Role / Timing Role: Primary PWM controller implementing current-mode flyback or buck topology with phase-cut dimming interface and soft-start. Use Value: Eliminates need for separate dimming decoder IC; achieves PF >0.9 and THD <20% in single-stage design per datasheet claims. |
Use Scenario: Powering linear LED strips or arrays in commercial wall-wash fixtures requiring smooth 1–100% dimming range and low EMI. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller regulating LED current while synchronizing to TRIAC zero-cross for flicker-free dimming. Use Value: Delivers stable dimming down to 1% with no visible stepping, enabled by precise 1-V CS threshold and programmable 70% DMAX. |
| Pathway Lighting Drivers | Overhead Indoor Lighting |
Use Scenario: Outdoor-rated LED path lights powered from 120-VAC branch circuits with weatherproof TRIAC dimming controls. IC Role / Device Role / Timing Role: Core controller managing isolated flyback conversion, EMI filtering, and dimming signal decoding in compact enclosure. Use Value: Supports wide input (21 V min) and operates reliably from –40°C to +105°C junction temperature per recommended conditions. |
Use Scenario: Ceiling-mounted LED troffers or panels in offices/hotels requiring quiet, flicker-free dimming and long lifetime. IC Role / Device Role / Timing Role: Gate driver and PWM modulator coordinating with optocoupler feedback loop to maintain constant LED current across line and load variations. Use Value: Integrated 5-V REF powers optocoupler and MCU supervisor, reducing component count and board space in space-constrained 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 |
|---|---|---|---|
| TPS92001D | 10-V UVLO turn-on, 1.65-V hysteresis, identical pinout and feature set. | Optimized for lower-input-voltage AC/DC systems (e.g., 120-VAC only); less margin for 230-VAC surge tolerance. | Select TPS92001D when designing for 120-VAC mains with tighter cost constraints and no requirement for 230-VAC universal operation. |
| NCP1014DR2G | Fixed-frequency current-mode controller with integrated 700-V MOSFET; no TRIAC dimming support; different pinout and topology assumptions. | Targets cost-sensitive, non-dimmable LED bulbs; lacks CS summation node, REF output, and soft-start flexibility of TPS92002D. | Choose NCP1014DR2G only for simple, non-dimmable, single-chip flyback designs where BOM count reduction outweighs dimming capability loss. |
Compared with TPS92001D, the TPS92002D offers higher UVLO hysteresis (6.2 V vs. 1.65 V) for improved brownout immunity in global mains applications; compared with NCP1014DR2G, it provides dedicated TRIAC interface, external MOSFET drive flexibility, and system-level design control at the expense of integration density.
Availability
TPS92002D is available at Aetrix Electronics and suitable for residential LED lamp drivers, architectural wall washing systems, and pathway lighting applications requiring stable component supply, long-lifecycle assurance, and consistent dimming performance across production batches.
Supply support for TPS92002D 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 automotive-grade reliability.
The TPS9200x family was designed specifically for cost-effective, single-stage, TRIAC-dimmable LED lighting drivers targeting residential and commercial retrofit lamps - prioritizing simplicity, EMI compliance, and wide dimming range without auxiliary controllers.
FAQ
What is the UVLO hysteresis of the TPS92002D and why does it matter?
The TPS92002D has a 6.2-V UVLO hysteresis (15-V turn-on, 8.8-V turn-off). This wide hysteresis prevents oscillatory startup or shutdown during AC-line sags or surges, ensuring stable operation in real-world 230-VAC environments where rectified bus voltage fluctuates significantly. It directly improves system robustness versus narrower-hysteresis alternatives like the TPS92001D.
Can the TPS92002D drive a MOSFET directly without external gate resistors?
No - the TPS92002D datasheet explicitly recommends a minimum 3.9-Ω series gate resistor on the GD pin. This limits peak gate current, damps parasitic ringing, and protects the internal totem-pole driver from shoot-through stress during fast switching transitions into capacitive loads.
How is the oscillator frequency set on the TPS92002D?
Oscillator frequency is set by external components: RRTC (pin 3), RRTD (pin 4), and CCT (timing capacitor to GND). With RRTC = 10 kΩ, RRTD = 4.32 kΩ, and CCT = 820 pF, the TPS92002D achieves 100 kHz (typ). Equation 3 in SLUSA24A defines fOSC = 0.74 / [CCT × (RRTC + RRTD + 54 pF)].
Does the TPS92002D support both isolated and non-isolated topologies?
Yes - the TPS92002D is explicitly qualified for both isolated (e.g., flyback with optocoupler feedback) and non-isolated (e.g., low-side buck) topologies. Figure 3 shows isolated flyback with TRIAC interface; Figure 4 shows non-isolated buck - both use identical TPS92002D pin connections and control architecture.
What is the purpose of the SS pin on the TPS92002D?
The SS (soft-start) pin on the TPS92002D controls startup behavior: it is charged by a 6-µA internal current source. From 0.4 V to 1.0 V, the output remains off; from 1.0 V to 2.0 V, duty cycle ramps linearly to 70%. Pulling SS below 0.5 V forces shutdown and reduces VDD current to 100 µA - enabling precise sequencing and fault recovery.
TPS92002D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SOIC
TPS92002D FAQ
1.How can I place an order for TPS92002D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92002D 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 TPS92002D reliable?
The price and inventory of TPS92002D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92002D is usually 5 days.
3.What payment methods are accepted for TPS92002D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92002D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92002D?
TPS92002D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92002D 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 TPS92002D?
For technical support, including TPS92002D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92002D requirements.
6.How does Aetrix verify that TPS92002D is sourced from the original manufacturer or authorized distributors?
All TPS92002D 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 TPS92002D meets industry standards.
7.What is the process for return or replacement of TPS92002D?
All TPS92002D units undergo pre-shipment inspection (PSI). If there is an issue with TPS92002D, 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 TPS92002D part is unused and in its original packaging.
Return procedure for TPS92002D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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