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Texas Instruments TPS922052DYYR
- Part No.:
- TPS922052DYYR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-14 Thin, SOT-23 Variant
- Datasheet:
-
TPS922052DYYR.pdf
- Description:
- 65-V, 2-A BUCK LED DRIVER WITH I
- Quantity:
- Payment:
- Shipping:
Inventory:2,885
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Product details
Overview
TPS922052DYYR from Texas Instruments is a 2A non-synchronous buck LED driver with integrated 150mΩ low-side NMOS FET, 4.5V–65V input range, and inductive fast dimming (IFD) capability. It supports common-anode LED configurations, operates up to 2.2MHz switching frequency, and delivers 150ns minimum PWM pulse width for machine vision strobes and medical lighting.
For engineers reviewing the TPS922052DYYR datasheet, TPS922052DYYR pinout, TPS922052DYYR application, or TPS922052DYYR equivalent, this device enables high-accuracy hybrid dimming (up to 1,000,000:1 at 120Hz), CC/CV battery charging, and robust fault handling including LED open/short, thermal foldback, and cycle-by-cycle current limiting.
Technical Context
The TPS922052DYYR implements adaptive off-time current mode control with smart sampling to achieve inductive fast dimming (IFD), enabling precise LED current regulation during rapid PWM transitions without output ripple or settling delay. Its error amplifier output (COMP) interfaces with an external RC network to set loop bandwidth, while FSET pin resistance configures switching frequency from 100kHz to 2.2MHz.
Dimming mode selection is determined at startup by logic states on EN/PWM and ADIM/HD pins: hybrid dimming requires EN/PWM = PWM signal + ADIM/HD = low, analog dimming requires EN/PWM = high + ADIM/HD = PWM signal, and spread spectrum is disabled-distinguishing it from TPS922053/TPS922055 variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 65V - supports wide-range industrial and automotive LED power supplies without pre-regulation. |
| Max Output Current | 2A continuous - set via external sense resistor; full-scale current sense threshold is 200mV. |
| Switching FET RDS(on) | 150mΩ typical - enables high-efficiency operation with minimal conduction loss at 2A load. |
| Min PWM Pulse Width | 150ns - allows ultra-fast strobing for machine vision and camera flash applications. |
| Thermal Protection | Configurable thermal foldback (via TEMP pin) + 165°C shutdown - ensures safe operation under sustained overload. |
| Dimming Accuracy | Hybrid dimming achieves 1,000,000:1 ratio at 120Hz - enables deep dimming in surgical lighting and laser projectors. |
| Junction Temperature Range | –40°C to +125°C - qualified for industrial and outdoor lighting environments. |
Pinout & Package
SOT-23-THN (14-pin) package with exposed thermal pad; 4.2mm × 3.3mm body size; PGND and AGND pins separated for noise-sensitive analog feedback stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND (Pin 1) | Power ground | Low-impedance return path for high-current SW node and internal FET; must connect to thermal pad. |
| AGND (Pin 2) | Analog ground | Reference for COMP, CSP/CSN, UVP, and FSET; isolated from PGND to prevent noise coupling into current sense path. |
| VIN (Pin 3) | Main power input | Accepts 4.5V–65V; powers internal LDO (VCC) and switching FET; UVLO triggers at ~3.0V rising. |
| VCC (Pin 4) | Internal LDO output | 5.15V ±0.15V regulated supply for internal circuitry; requires 1μF capacitor to AGND for soft-start timing. |
| ADIM/HD (Pin 5) | Dimming mode selector | Pull low for hybrid dimming; apply PWM for analog dimming; high for PWM-only mode. |
| EN/PWM (Pin 6) | Enable / PWM input | High = always-on; low = disable; PWM input enables PWM/hybrid dimming; >5μs pulse required for enable. |
| FAULT (Pin 7) | Open-drain fault indicator | Pulled low on LED open/short, thermal fault, or current limit violation; requires external pull-up. |
| TEMP (Pin 8) | Thermal foldback control | Connect resistor to AGND to set foldback curve; direct AGND connection disables foldback. |
| FSET (Pin 9) | Frequency programming | Resistor to AGND sets switching frequency (100kHz–2.2MHz); 59kΩ = 400kHz per datasheet table. |
| COMP (Pin 10) | Error amplifier output | Drives external compensation network (RC) to stabilize current regulation loop bandwidth. |
| UVP (Pin 11) | LED open detection | Resistor divider sets LED open voltage threshold; floating = zero threshold (always detect open). |
| CSP (Pin 12) | Current sense positive | High-side input of differential current sense amplifier; monitors voltage across RSENSE. |
| CSN (Pin 13) | Current sense negative | Low-side input of differential current sense amplifier; referenced to AGND, not PGND. |
| SW (Pin 14) | Switching node | Connects to inductor and Schottky diode cathode; carries high di/dt; requires tight layout and ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond LED current response to PWM edges without output overshoot or settling delay. |
| Hybrid Dimming Architecture | Combines analog dimming (12.5–100% brightness) and PWM dimming (0–12.5%) for 1,000,000:1 ratio at 120Hz. |
| Integrated Low-Side FET | 150mΩ RDS(on) eliminates external MOSFET, reduces BOM count, and supports single-layer PCB design. |
| Common-Anode LED Support | Allows direct connection to high-side constant-voltage rails-ideal for multi-string architectural lighting. |
| Full Fault Protection Suite | Detects LED open/short, sense resistor failure, thermal events, and cycle-by-cycle overcurrent with FAULT pin assertion. |
Applications
| Machine Vision Strobing | Medical Surgical Lighting |
|---|---|
Use Scenario: High-speed inspection systems requiring synchronized, nanosecond-precision LED flashes to freeze motion of moving parts. IC Role / Device Role / Timing Role: Constant-current LED driver with 150ns minimum PWM pulse width and inductive fast dimming for zero-latency current turn-on/off. Use Value: Eliminates motion blur in automated optical inspection (AOI) and semiconductor wafer scanning by delivering repeatable, jitter-free illumination pulses. |
Use Scenario: Adjustable-intensity operating room lights where flicker-free dimming down to 0.0001% brightness is required for pupil adaptation. IC Role / Device Role / Timing Role: Hybrid dimming controller supporting 1,000,000:1 ratio at 120Hz with analog precision above 12.5% and PWM resolution below. Use Value: Enables seamless, imperceptible brightness transitions during critical procedures without visual fatigue or photobiomodulation interference. |
| Industrial Projector Backlight | Battery Charging Source |
Use Scenario: Laser TV and DLP projector systems needing stable, ripple-free LED current for color accuracy and contrast preservation. IC Role / Device Role / Timing Role: Constant-current buck regulator with adaptive off-time control and 200mV current sense reference for <±1% regulation accuracy. Use Value: Maintains consistent luminance across temperature and input voltage variations, preventing grayscale banding and color shift in high-dynamic-range displays. |
Use Scenario: Portable medical devices and handheld test equipment requiring dual-mode CC/CV charging of Li-ion or lead-acid batteries. IC Role / Device Role / Timing Role: Programmable CC/CV source using same current sense and voltage feedback architecture as LED driving mode. Use Value: Reduces component count by reusing the same IC for both illumination and onboard battery management in space-constrained designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS922053DYYR | Same SOT-23-THN package and 3A current limit, but includes enabled spread spectrum (±7%, 2kHz modulation) for EMI reduction. | Better suited for noise-sensitive environments (e.g., IP cameras, audio-visual systems) where conducted EMI must be minimized. | Select TPS922053DYYR when EMI compliance is prioritized over absolute dimming linearity at lowest brightness levels. |
| TPS922054DYYR | Same package but rated for 6A typical current limit and higher 5.2–7A cycle-by-cycle limit; otherwise identical pinout and feature set. | Required for higher-power LED arrays (e.g., stadium lighting, industrial UV curing) demanding >2A continuous output. | Choose TPS922054DYYR only when system-level current demand exceeds 2A and thermal design supports higher dissipation. |
Compared with TPS922052DYYR, TPS922053DYYR adds spread spectrum for lower EMI but may exhibit slightly reduced dimming fidelity at ultra-low duty cycles, while TPS922054DYYR doubles current capability at the cost of higher thermal load and no change in dimming resolution or IFD performance.
Availability
TPS922052DYYR is available at Aetrix Electronics and suitable for machine vision strobing, medical surgical lighting, industrial projector backlighting, battery charging, and TEC control applications requiring stable component supply across production lifecycles.
Supply support for TPS922052DYYR 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 high-reliability LED drivers and power conversion ICs.
The TPS92205x product line was designed specifically for high-performance LED illumination systems requiring inductive fast dimming, hybrid dimming flexibility, and integrated protection-targeting medical, industrial, and professional lighting markets.
FAQ
What is the maximum supported switching frequency for TPS922052DYYR?
The TPS922052DYYR supports configurable switching frequencies from 100kHz to 2.2MHz via an external resistor on the FSET pin. At 2.2MHz, the minimum off-time remains 100ns, enabling compact magnetics and reduced output ripple. The device maintains stable current regulation across this full range without requiring loop compensation changes.
Does TPS922052DYYR support constant-voltage (CV) mode for battery charging?
Yes, TPS922052DYYR supports CC/CV charging mode. When configured with appropriate external feedback components, it regulates output voltage (e.g., for Li-ion termination) after reaching programmed current limit-enabling dual-use in LED lighting and portable battery-powered systems without additional ICs.
How does the hybrid dimming function work in TPS922052DYYR?
In hybrid dimming mode, TPS922052DYYR uses analog dimming for brightness levels from 12.5% to 100% (8-bit resolution, 0.4% step) and switches to fast PWM dimming below 12.5%. This architecture achieves up to 1,000,000:1 dimming ratio at 120Hz while maintaining smooth transitions and eliminating low-brightness flicker or nonlinearity.
What thermal protection features are implemented in TPS922052DYYR?
TPS922052DYYR includes thermal shutdown at 165°C and configurable thermal foldback via the TEMP pin. A resistor to AGND sets the foldback starting temperature (e.g., 130°C with 20kΩ), allowing gradual current reduction before shutdown-critical for maintaining reliability in enclosed or high-ambient lighting fixtures.
Can TPS922052DYYR drive LEDs in common-anode configuration?
Yes, TPS922052DYYR is explicitly designed for common-anode LED strings. Its low-side NMOS switch connects between the LED cathodes and ground, enabling direct interface to fixed high-voltage rails-reducing system complexity and enabling single-layer PCB layouts in architectural and signage lighting.
TPS922052DYYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-14 Thin, SOT-23 Variant
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- DC DC Regulator
- Topology:
- Step-Down (Buck)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 1
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 63V
- Voltage - Output:
- 0V ~ 63V
- Current - Output / Channel:
- 2A
- Frequency:
- 100kHz ~ 2.2MHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight, Lighting
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOT-23-THIN
TPS922052DYYR FAQ
1.How can I place an order for TPS922052DYYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS922052DYYR 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 TPS922052DYYR reliable?
The price and inventory of TPS922052DYYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS922052DYYR is usually 5 days.
3.What payment methods are accepted for TPS922052DYYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS922052DYYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS922052DYYR?
TPS922052DYYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS922052DYYR 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 TPS922052DYYR?
For technical support, including TPS922052DYYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS922052DYYR requirements.
6.How does Aetrix verify that TPS922052DYYR is sourced from the original manufacturer or authorized distributors?
All TPS922052DYYR 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 TPS922052DYYR meets industry standards.
7.What is the process for return or replacement of TPS922052DYYR?
All TPS922052DYYR units undergo pre-shipment inspection (PSI). If there is an issue with TPS922052DYYR, 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 TPS922052DYYR part is unused and in its original packaging.
Return procedure for TPS922052DYYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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