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Texas Instruments TPS92001DR
- Part No.:
- TPS92001DR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TPS92001DR.pdf
- Description:
- IC LED DRIVER OFFL TRIAC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,553
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Product details
Overview
TPS92001DR from Texas Instruments is a phase-cut TRIAC-dimmable PWM controller for single-stage LED lighting drivers, supporting isolated and non-isolated topologies. It delivers 0.4-A source / 0.8-A sink gate drive, operates up to 1 MHz, features a 5-V reference output, and includes undervoltage lockout (UVLO) with 10 V turn-on threshold - used in residential A19/E26/GU10/MR16 LED lamp drivers.
For engineers reviewing the TPS92001DR datasheet, TPS92001DR pinout, TPS92001DR application, or TPS92001DR equivalent, this page provides verified functional identity, SOIC-8 package mapping, confirmed UVLO thresholds, oscillator timing parameters, gate driver capability, and real-world dimming interface implementation details.
Technical Context
The TPS92001DR implements fixed-frequency current-mode control using an internal oscillator with programmable rise/fall times via RTC/RTD pins and a timing capacitor (CCT). Its CS pin sums primary current sense and slope compensation against a precise 1-V threshold to reset the PWM latch.
It integrates a totem-pole gate driver optimized for N-channel MOSFETs, full-cycle soft-start via SS pin charging, and a buffered 5-V reference (REF) capable of sourcing up to 6 mA. UVLO ensures safe startup with 10 V turn-on and 8 V turn-off thresholds, and internal clamp limits VDD to 17.5 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| UVLO Turn-On Threshold | 10 V - Ensures reliable startup only after input rail stabilizes above minimum operating voltage. |
| Gate Driver Capability | 0.4-A source / 0.8-A sink - Directly drives medium-power N-MOSFET gates without external buffers. |
| Oscillator Frequency Range | 90–110 kHz - Programmable via RTC, RTD, and CCT; supports EMI-compliant switching in LED drivers. |
| Reference Output | 5 V ±2.5% - Stable, buffered supply for optocouplers or microcontrollers; requires 0.47-µF ceramic bypass. |
| Startup Current | 110 µA - Enables low-power auxiliary supply designs and reduces no-load losses. |
| Maximum Duty Cycle | 70% - Limits conduction time to maintain stability and prevent transformer saturation in flyback designs. |
| CS Comparator Threshold | 0.95 V typical - Sets current regulation point; slope compensation improves loop stability under DCM/PWM transitions. |
Pinout & Package
TPS92001DR is housed in an 8-pin SOIC (D) package (JEDEC MS-012, variation AA), 3.91 mm wide × 4.9 mm long × 1.75 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - CS | Current Sense Input | Summing node for primary current feedback and slope compensation; includes internal 250-Ω discharge FET for leading-edge blanking. |
| 2 - SS | Soft-Start Control | Charged by 6-µA internal current source; 0.4–2 V ramp controls duty-cycle ramp-up; <0.5 V forces shutdown. |
| 3 - RTC | Oscillator Timing (Rise) | Connects to RRTC to set oscillator charging time; senses upper threshold (3.33 V) via RTD during CCT charge cycle. |
| 4 - RTD | Oscillator Timing (Fall) | Connects to RRTD to set oscillator discharge time; senses lower threshold (1.67 V) via RTC during CCT discharge cycle. |
| 5 - GND | Power & Signal Ground | Common reference for all analog and power circuits; must be low-inductance connection to minimize noise coupling. |
| 6 - GD | Gate Driver Output | Totem-pole output driving N-MOSFET gate; requires ≥3.9 Ω series resistor to limit peak current and damp ringing. |
| 7 - VDD | Supply Input | Shunt-clamped at 17.5 V; bypassed with 1-µF ceramic capacitor; powers internal circuitry and gate driver. |
| 8 - REF | 5-V Reference Output | Buffered, low-noise 5-V source (±2.5%); supplies optocoupler LEDs or MCU peripherals; requires 0.47-µF ceramic bypass to GND. |
Key Features
| Feature | Design Value |
|---|---|
| TRIAC Dimming Compatibility | Supports phase-cut AC dimmers without external synchronization circuitry - enables direct retrofit into legacy incandescent fixtures. |
| Single-Stage Design Enablement | Integrates PFC-capable control logic and high-voltage tolerance (17.5 V clamp) - eliminates need for separate PFC controller in cost-sensitive LED drivers. |
| Low Component Count Operation | Requires only RTC, RTD, CCT, CS sense resistor, and REF bypass cap - reduces BOM cost and board area vs. multi-chip solutions. |
| Full-Cycle Soft Start | Internal 6-µA SS current source and voltage-ramped enable sequence prevent inrush current and transformer stress at power-up. |
| Robust EMI Filtering Support | CS pin's integrated 250-Ω NMOS discharge path enables effective high-frequency noise filtering with minimal external RC components. |
Applications
| Residential LED Lamp Drivers | Architectural Wall Washing |
|---|---|
Use Scenario: Driving GU10 or MR16 LED modules in mains-connected downlights with trailing-edge TRIAC dimmers. IC Role / Device Role / Timing Role: Primary PWM controller regulating LED current in non-isolated buck-derived topology with integrated dimming interface. Use Value: Eliminates separate dimmer decoder IC; 70% max duty cycle prevents over-stress in compact thermal envelopes. |
Use Scenario: Powering linear LED strips behind architectural coves with smooth 1–100% dimming range and flicker-free operation. IC Role / Device Role / Timing Role: Fixed-frequency current-mode controller synchronizing LED current to phase-cut AC envelope via CS feedback modulation. Use Value: 100-µA startup current enables use with high-impedance auxiliary supplies; 5-V REF powers local dimming microcontroller. |
| Overhead Office Lighting | Pathway & Sconce Lighting |
Use Scenario: Driving PAR30/38 integral LED lamps in commercial ceiling fixtures requiring PF >0.9 and THD <20%. IC Role / Device Role / Timing Role: Core controller in single-stage flyback with valley-switching assist, managing both PFC and regulation via CS and REF feedback paths. Use Value: UVLO hysteresis (2 V) prevents oscillation near brownout; 1-MHz capability allows smaller magnetics for space-constrained troffer designs. |
Use Scenario: Low-power outdoor wall sconces powered from 120 VAC with weather-resistant TRIAC dimming interface. IC Role / Device Role / Timing Role: Gate driver and oscillator core in low-side buck configuration, using GD output to switch high-side MOSFET via bootstrap. Use Value: 0.8-A sink capability ensures fast MOSFET turn-off under cold ambient conditions; SOIC-8 package supports conformal coating. |
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 |
|---|---|---|---|
| TPS92002DR | Higher UVLO turn-on (15 V) and turn-off (8.8 V); otherwise identical pinout, timing, and drive specs. | Better suited for DC-input or high-line AC systems where 10 V UVLO would cause premature shutdown during brownouts. | Select TPS92002DR when input voltage dips below 12 V are expected; retain same layout and external components. |
| NCP1014DR2G | Fixed-frequency current-mode controller with integrated 700 V MOSFET; no REF output or TRIAC dimming support. | Targets ultra-low-cost, non-dimmable LED bulbs; lacks soft-start control, 5-V REF, and CS-based slope compensation. | Choose NCP1014DR2G only for cost-driven, non-dimmable applications where board space permits larger SOIC-8 footprint and no auxiliary bias needed. |
Compared with TPS92002DR, the TPS92001DR offers earlier startup for universal-input designs but less brownout resilience; versus NCP1014DR2G, it adds dimming interface, precision REF, and soft-start - at the cost of requiring an external MOSFET.
Availability
TPS92001DR is available at Aetrix Electronics and suitable for residential LED lamp drivers, architectural wall washing systems, and pathway lighting requiring stable component supply across global production programs.
Supply support for TPS92001DR 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.
The TPS92001DR belongs to TI's general-purpose LED lighting controller product line, designed specifically for cost-effective, TRIAC-dimmable, single-stage AC/DC LED drivers targeting residential and commercial retrofit lamps.
FAQ
What is the UVLO behavior of the TPS92001DR?
The TPS92001DR features undervoltage lockout with a 10 V turn-on threshold and 8 V turn-off threshold, providing 2 V hysteresis. This ensures clean startup once the input rail exceeds 10 V and prevents erratic operation during brownout conditions. The internal clamp limits VDD to 17.5 V, protecting the TPS92001DR from overvoltage stress during transient events.
Can the TPS92001DR drive a high-side N-channel MOSFET directly?
No - the TPS92001DR GD pin is a ground-referenced totem-pole driver optimized for low-side or bootstrapped high-side configurations. To drive a high-side N-MOSFET, a bootstrap circuit with floating supply and gate resistor (≥3.9 Ω) is required. The TPS92001DR does not include high-side level-shifting circuitry.
What timing components set the oscillator frequency of the TPS92001DR?
The TPS92001DR 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 nominal frequency is 100 kHz. Equation fOSC = 0.74 / [CCT × (RRTC + RRTD + 27 pF)] applies per the datasheet.
Does the TPS92001DR support both leading- and trailing-edge TRIAC dimmers?
The TPS92001DR is explicitly characterized for phase-cut TRIAC dimming, including compatibility with standard leading-edge (incandescent-compatible) dimmers. Trailing-edge (electronic low-voltage) dimmer support is not specified in the datasheet and requires validation in the target application circuit due to differences in firing angle detection and hold-current requirements.
How is soft-start implemented on the TPS92001DR?
The TPS92001DR implements full-cycle soft-start via the SS pin: an internal 6-µA current source charges an external capacitor, ramping SS from 0.4 V to 2 V. Below 0.5 V, the GD output is held low; between 1 V and 2 V, duty cycle increases linearly. This prevents inrush current and magnetic core saturation during startup of the TPS92001DR-based converter.
TPS92001DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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 ~ 105°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
TPS92001DR FAQ
1.How can I place an order for TPS92001DR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS92001DR 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 TPS92001DR reliable?
The price and inventory of TPS92001DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS92001DR is usually 5 days.
3.What payment methods are accepted for TPS92001DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS92001DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS92001DR?
TPS92001DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS92001DR 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 TPS92001DR?
For technical support, including TPS92001DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS92001DR requirements.
6.How does Aetrix verify that TPS92001DR is sourced from the original manufacturer or authorized distributors?
All TPS92001DR 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 TPS92001DR meets industry standards.
7.What is the process for return or replacement of TPS92001DR?
All TPS92001DR units undergo pre-shipment inspection (PSI). If there is an issue with TPS92001DR, 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 TPS92001DR part is unused and in its original packaging.
Return procedure for TPS92001DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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