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Texas Instruments TPS92001D
- Part No.:
- TPS92001D
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92001D.pdf
- Description:
- IC LED DRIVER OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:525
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Product details
Overview
TPS92001D from Texas Instruments is a phase-cut TRIAC-dimmable PWM controller for LED lighting, implementing fixed-frequency current-mode control in isolated and non-isolated flyback topologies. It features 0.4-A source / 0.8-A sink gate drive, 100-kHz switching frequency (programmable via RTC/RTD/CCT), 5-V reference output, and undervoltage lockout with 10-V turn-on threshold - enabling residential A19/E26/GU10 lamp drivers with high PF and low EMI.
For engineers reviewing the TPS92001D datasheet, TPS92001D pinout, TPS92001D application, or TPS92001D equivalent, this page delivers verified technical context, validated pin functions, real-world dimming interface implementation details, and confirmed alternative options for TRIAC-dimmable LED driver design.
Technical Context
The TPS92001D integrates a current-mode PWM latch, oscillator with programmable rise/fall timing (via RTC/RTD pins), soft-start circuitry (6-µA internal current source charging SS pin), and totem-pole gate driver optimized for N-channel MOSFETs. Its CS pin combines primary current sense, optocoupler voltage feedback, and slope compensation - referenced to a precise 1-V comparator threshold.
Oscillator operation relies on external timing capacitor CCT and resistors RRTC (10 kΩ min) and RRTD (4.32 kΩ min) to set frequency (90–110 kHz typical) and maximum duty cycle (70%). UVLO hysteresis is 1.65 V, and startup current is ≤110 µA - ensuring reliable operation across –40°C to +105°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching frequency | 90–110 kHz - sets transformer size, EMI profile, and audible noise margin in LED drivers |
| Max duty cycle | 70% - limits peak primary current and ensures safe operation under wide input/dimming ranges |
| UVLO turn-on threshold | 10 V ±0.6 V - prevents erratic startup during brownout or slow AC line ramp-up |
| Gate drive capability | 0.4-A source / 0.8-A sink - directly drives medium-power MOSFET gates without external buffers |
| Reference output | 5.0 V ±2.5% - powers microcontrollers, optocouplers, or auxiliary circuits with <2 mV line/load regulation |
| Startup current | ≤110 µA - enables direct AC rectified supply startup without auxiliary winding or bias circuit |
| Operating temp range | –40°C to +105°C - supports enclosed residential lamp environments and thermal cycling reliability |
Pinout & Package
TPS92001D is housed in an 8-pin SOIC (D) package, 3.91 mm × 4.90 mm × 1.75 mm, RoHS-compliant with NIPDAU lead finish and JEDEC MS-012 AA outline. Pin 1 index is marked by a beveled corner; device orientation follows standard SOIC conventions with pin 1 at top-left when notch faces up.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 7) | Power input | Shunt-regulated at 17.5 V; bypassed with 1-µF ceramic capacitor - supplies internal logic and gate driver |
| GD (Pin 6) | Gate driver output | Totem-pole output driving N-MOSFET gate; requires ≥3.9 Ω series resistor to limit dV/dt and ringing |
| GND (Pin 5) | Ground reference | Common return for power, signal, and reference - must be low-inductance star point for stability |
| CS (Pin 1) | Current sense input | Summing node for primary current, optocoupler feedback, and slope compensation; includes internal 250-Ω discharge FET |
| SS (Pin 2) | Soft-start control | Charged by 6-µA internal current; 0.4–2.0 V ramp controls duty-cycle ramp-up and enables shutdown below 0.5 V |
| RTC (Pin 3) | Oscillator timing input | Controls rising edge of timing capacitor CCT; connects to RRTC - sets oscillator frequency rise time |
| RTD (Pin 4) | Oscillator timing input | Controls falling edge of CCT; connects to RRTD - sets oscillator frequency fall time and max duty cycle |
| REF (Pin 8) | 5-V reference output | Buffered, low-noise 5-V rail; requires 0.47-µF ceramic bypass to GND - powers external ICs or optocoupler LEDs |
Key Features
| Feature | Design Value |
|---|---|
| Phase-cut TRIAC dimming support | Enables compatibility with legacy wall dimmers without additional active front-end circuitry |
| Full-cycle soft start | Prevents inrush current and transformer saturation during cold start; implemented via SS pin voltage ramp |
| Integrated 5-V reference | Eliminates need for external LDO; stable enough to power optocoupler LEDs and MCU peripherals directly |
| Leading-edge blanking via CS discharge | Internal 250-Ω NMOS discharges external RC filter during off-time - improves noise immunity and reduces BOM count |
| Low 100-µA startup current | Permits direct connection to rectified AC line without auxiliary winding - simplifies single-stage designs |
Applications
| Residential LED Lamp Drivers | Architectural Wall Washing |
|---|---|
Use Scenario: Driving integrated A19, GU10, or MR16 lamps from 120/230-V AC mains with leading-edge TRIAC dimmers. IC Role / Device Role / Timing Role: Primary-side PWM controller regulating LED current while interpreting phase-cut waveform for dimming level. Use Value: Achieves >0.9 PF and meets IEC 61000-3-2 Class C without PFC stage - reducing component count and cost. |
Use Scenario: Constant-current drivers for linear LED strips mounted behind architectural coves or façades. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller managing wide-input voltage (90–265 VAC) and deep dimming range (1–100%). Use Value: 70% max duty cycle and programmable oscillator enable stable operation at low conduction angles (<30°) without flicker. |
| Pathway & Sconce Lighting | Overhead Commercial Fixtures |
Use Scenario: Outdoor-rated wall sconces and pathway lights requiring robust thermal performance and EMI compliance. IC Role / Device Role / Timing Role: Gate driver and control core in non-isolated buck-derived topology with TRIAC interface. Use Value: 105°C max junction rating and SOIC-8 package allow compact PCB layout in thermally constrained enclosures. |
Use Scenario: PAR30/38 retrofit lamps and recessed downlights needing high efficiency and smooth dimming curve. IC Role / Device Role / Timing Role: Primary-side controller implementing valley-switching-like behavior via CS/RTC/RTD coordination. Use Value: Internal 1-V CS threshold and slope compensation ensure consistent current regulation across line and load variations. |
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 |
|---|---|---|---|
| TPS92002D | Higher UVLO turn-on threshold (15 V vs. 10 V); identical pinout, timing, and gate drive specs | Better suited for DC-input or high-line AC systems where 10-V startup is marginal | Select TPS92002D if operating from ≥24-VDC bus or high-voltage AC with slow ramp-up |
| NCP1014DR2G | Fixed-frequency current-mode controller without TRIAC dimming interface; no REF pin or SS control | Lacks native phase-cut dimming support - requires external dimming circuitry or digital control | Choose only when dimming is handled externally or not required; lower BOM cost but higher system complexity |
Compared with TPS92001D, TPS92002D offers higher startup voltage headroom while maintaining full functional and pin compatibility, whereas NCP1014DR2G provides basic PWM control at lower cost but omits dimming integration and reference output - requiring added components for equivalent functionality.
Availability
TPS92001D 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-term lifecycle support, and RoHS-compliant sourcing.
Supply support for TPS92001D 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 over 50 years of innovation in power conversion and lighting control ICs.
The TPS92001D belongs to TI's general-purpose LED lighting controller product line, designed specifically for cost-sensitive, TRIAC-dimmable AC/DC LED drivers targeting residential and commercial retrofit lamps.
FAQ
What is the UVLO threshold and hysteresis of the TPS92001D?
The TPS92001D has a UVLO turn-on threshold of 10 V ±0.6 V and hysteresis of 1.65 V. This means the device remains latched off until VDD rises above 10 V, then stays active until VDD falls below 8.35 V. The hysteresis prevents oscillation near the threshold and ensures clean startup under varying AC line conditions. These values are specified over temperature and confirmed in the SLUSA24A datasheet electrical characteristics table.
Can the TPS92001D drive a MOSFET directly without a gate driver IC?
Yes, the TPS92001D can drive medium-power N-channel MOSFETs directly using its integrated 0.4-A source / 0.8-A sink totem-pole gate driver. A minimum 3.9-Ω series resistor is recommended to limit peak gate current and suppress ringing. The driver operates with low saturation voltages (≤1.5 V at rated current), making it suitable for MOSFETs with Qg ≤30 nC in typical 10–25 W LED driver designs.
How is the switching frequency set on the TPS92001D?
The TPS92001D switching frequency is set by external components: timing capacitor CCT (typically 820 pF) and two resistors - RRTC (10 kΩ) on pin RTC and RRTD (4.32 kΩ) on pin RTD. Equation 3 in the datasheet gives fOSC = 0.74 / [CCT × (RRTC + RRTD + 54 pF)]. At these values, frequency is 100 kHz nominal, with ±10% variation due to component tolerances and temperature drift.
Does the TPS92001D support both isolated and non-isolated topologies?
Yes, the TPS92001D supports both isolated (e.g., flyback) and non-isolated (e.g., low-side buck, buck-boost) topologies. Its current-mode architecture and flexible feedback path - accepting signals from current sense resistors, optocouplers, or auxiliary windings - enable implementation in either configuration. Figure 3 (isolated flyback) and Figure 4 (low-side buck) in the SLUSA24A datasheet confirm both use cases.
What is the purpose of the SS pin on the TPS92001D?
The SS (soft-start) pin on the TPS92001D controls startup behavior via an internal 6-µA current source that charges an external capacitor. As SS ramps from 0.4 V to 2.0 V, the output duty cycle increases gradually - preventing inrush current and transformer saturation. Pulling SS below 0.5 V forces shutdown and reduces VDD current to 100 µA, enabling simple enable/disable control without external logic.
TPS92001D 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 ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS92001D FAQ
1.How can I place an order for TPS92001D through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92001D 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 TPS92001D reliable?
The price and inventory of TPS92001D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92001D is usually 5 days.
3.What payment methods are accepted for TPS92001D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92001D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92001D?
TPS92001D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92001D 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 TPS92001D?
For technical support, including TPS92001D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92001D requirements.
6.How does Aetrix verify that TPS92001D is sourced from the original manufacturer or authorized distributors?
All TPS92001D 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 TPS92001D meets industry standards.
7.What is the process for return or replacement of TPS92001D?
All TPS92001D units undergo pre-shipment inspection (PSI). If there is an issue with TPS92001D, 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 TPS92001D part is unused and in its original packaging.
Return procedure for TPS92001D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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