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Texas Instruments TPS922052DRRR
- Part No.:
- TPS922052DRRR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
TPS922052DRRR.pdf
- Description:
- 65-V, 2-A BUCK LED DRIVER WITH I
- Quantity:
- Payment:
- Shipping:
Inventory:805
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Product details
Overview
TPS922052DRRR from Texas Instruments is a 4.5V–65V input, non-synchronous buck LED driver with integrated 150mΩ low-side NMOS FET, 3A cycle-by-cycle current limit, and support for inductive fast dimming (IFD). It delivers constant-current LED drive or constant-voltage output for battery charging and TEC control in compact WSON-12 packaging.
For engineers reviewing the TPS922052DRRR datasheet, TPS922052DRRR pinout, TPS922052DRRR application, or TPS922052DRRR equivalent, key selection factors include its 150ns minimum PWM pulse width, hybrid dimming up to 1,000,000:1 at 120Hz, configurable 100kHz–2.2MHz switching frequency, thermal foldback via external resistor, and fault reporting via open-drain FAULT pin.
Technical Context
The TPS922052DRRR uses adaptive off-time current mode control with smart sampling to enable inductive fast dimming (IFD), achieving high dimming accuracy without external MOSFETs. Its error amplifier output (COMP) interfaces with an external RC network to set bandwidth, while the FSET pin sets switching frequency via resistor value - e.g., 59kΩ yields 400kHz.
Dimming mode 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. The device disables spread spectrum (unlike TPS922053/TPS922055), prioritizing brightness stability in low-light operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input voltage range | 4.5V to 63V - supports wide-range industrial and automotive LED power supplies without pre-regulation |
| Output current capability | Up to 2A continuous - limited by thermal design and PCB layout; 3A cycle-by-cycle current limit protects against transient overloads |
| Switching FET RDS(on) | 150mΩ typical - enables high-efficiency operation with minimal conduction loss at rated load |
| Minimum PWM pulse width | 150ns - allows ultra-fast, precise LED brightness control in machine vision and strobe applications |
| Dimming ratio (hybrid, 120Hz) | 1,000,000:1 - achieves deep dimming without visible flicker or color shift in medical/surgical lighting |
| Thermal shutdown threshold | 165°C with 15°C hysteresis - provides robust overtemperature protection while allowing safe derating margins |
| Current sense threshold | 200mV ±3mV - enables accurate, stable LED current regulation across temperature and process variation |
Pinout & Package
TPS922052DRRR is housed in a thermally enhanced 12-pin WSON package (3.0mm × 3.0mm, 0.5mm pitch) with exposed thermal pad connected to PGND/AGND. Pin functions are validated per TI SLVSGG9B datasheet Figure 5-2 and Table 5-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects internally to low-side NMOS drain; ties to inductor and Schottky diode cathode - critical for EMI and thermal layout |
| CSP / CSN | Current sense inputs | Differential pair measuring voltage across external sense resistor; 200mV threshold sets LED current with ±3mV tolerance |
| EN/PWM | Enable / PWM input | Configures device enable state and selects dimming mode; accepts 150ns minimum pulses for direct PWM control |
| ADIM/HD | Analog dimming / hybrid dimming select | Logic-level input determining dimming architecture: low = hybrid, high = PWM-only, PWM signal = analog/flexible |
| FAULT | Open-drain fault indicator | Pulls low on LED open/short, thermal shutdown, or FET fault - enables system-level fault logging without polling |
| FSET | Frequency set input | Resistor-to-AGND sets switching frequency from 100kHz to 2.2MHz; lower frequencies improve efficiency and thermal performance |
| TEMP | Thermal foldback control | Resistor-to-AGND configures thermal foldback curve; direct AGND connection disables foldback |
| VIN | Main power input | Accepts 4.5V–63V; powers internal LDO and switching FET - requires local 10µF ceramic input capacitor |
| VCC | Internal LDO output | 5.15V ±0.15V regulated supply for internal circuitry; requires 1µF capacitor to AGND for soft-start timing |
| PGND / AGND | Power / analog ground | Separate ground pins minimize noise coupling; thermal pad connects to both - must be soldered to large copper pour |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond LED current transitions without external gate drivers - essential for machine vision flash synchronization |
| Hybrid dimming architecture | Combines analog dimming (12.5–100% brightness) and PWM dimming (0–12.5%) to achieve 1M:1 ratio at 120Hz with no color shift |
| Configurable thermal foldback | External resistor on TEMP pin tailors thermal derating behavior - preserves light output during sustained overload vs. abrupt shutdown |
| Full-system protection suite | Includes LED open/short, CSP/CSN resistor failure, cycle-by-cycle current limit, and thermal shutdown - reduces need for external monitoring circuits |
| Common-anode LED topology support | Eliminates need for high-side current sensing or floating controllers - simplifies PCB routing and lowers BOM cost |
Applications
| Medical Surgical Lighting | Machine Vision Flash |
|---|---|
Use Scenario: High-CRI, flicker-free illumination for endoscopic and surgical procedures requiring precise color rendering and zero temporal artifacts. IC Role / Device Role / Timing Role: Constant-current LED driver with hybrid dimming enabling 1,000,000:1 brightness control at 120Hz - maintains CCT stability across full dimming range. Use Value: Eliminates visible flicker and color shift during slow-motion video capture, meeting IEC 62471 photobiological safety requirements. |
Use Scenario: Synchronized, ultra-brief LED flash triggered by camera shutter signal for high-speed industrial inspection. IC Role / Device Role / Timing Role: Inductive fast dimming (IFD) controller delivering 150ns minimum LED on-pulse - matches CMOS sensor exposure timing with sub-microsecond precision. Use Value: Enables motion-free imaging at >10,000 fps without motion blur, reducing post-processing latency in automated optical inspection (AOI) systems. |
| LCD Backlighting | Battery Charging (CC/CV) |
Use Scenario: Dynamic contrast enhancement in commercial displays using local dimming zones driven by PWM and analog signals. IC Role / Device Role / Timing Role: Dual-mode dimming controller supporting flexible dimming (PWM on EN/PWM + analog on ADIM/HD) for independent zone control. Use Value: Achieves >10,000:1 contrast ratio while maintaining uniform luminance across zones - no external DAC or microcontroller required. |
Use Scenario: Single-chip CC/CV source for Li-ion or lead-acid battery charging in portable medical devices and IoT edge nodes. IC Role / Device Role / Timing Role: Buck converter operating in constant-voltage mode with programmable current limit - replaces dedicated charger ICs in space-constrained designs. Use Value: Reduces bill-of-materials by integrating LED drive and battery charge functionality, with shared current-sense resistor and thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS922052DMTR | VSON-14 package (4.5mm × 3.0mm); identical electrical specs and pinout except for thermal pad configuration and pin count | Better thermal performance (RθJA = 39.1°C/W vs. 47.4°C/W) but requires 14-pin layout; not drop-in compatible with WSON footprint | Select when board space allows larger package and higher power dissipation is needed |
| TPS922053DRRR | Same WSON-12 package and pinout; includes enabled spread spectrum (±7%, 2kHz modulation) for improved EMI compliance | Suitable for noise-sensitive environments (e.g., MRI-adjacent equipment); trades slight brightness ripple for reduced conducted emissions | Choose when EMI certification (CISPR 25 Class 5) is mandatory and brightness stability at lowest dim levels is secondary |
Compared with TPS922052DRRR, TPS922052DMTR offers superior thermal resistance but requires PCB redesign, while TPS922053DRRR provides EMI reduction at the cost of minor low-brightness ripple - neither is pin-compatible without layout changes, and both retain identical dimming architecture and protection features.
Availability
TPS922052DRRR is available at Aetrix Electronics and suitable for medical lighting, machine vision flash, LCD backlighting, battery charging, and TEC control applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS922052DRRR 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 TPS92205x product line was designed for high-performance, multi-function LED driving in space-constrained, thermally demanding applications - combining CC/CV operation, advanced dimming, and comprehensive protection in single-chip solutions.
FAQ
What dimming modes does the TPS922052DRRR support, and how are they selected?
The TPS922052DRRR supports four dimming modes: PWM, analog, hybrid, and flexible. Selection occurs at startup based on logic states applied to EN/PWM and ADIM/HD pins. For example, hybrid dimming requires EN/PWM = PWM signal and ADIM/HD = low; analog dimming requires EN/PWM = high and ADIM/HD = PWM signal. All modes are implemented without firmware or external controllers - the TPS922052DRRR handles mode detection and execution autonomously.
Does the TPS922052DRRR support constant-voltage (CV) operation, and for what applications?
Yes, the TPS922052DRRR supports constant-voltage (CV) mode in addition to constant-current (CC) operation. In CV mode, it regulates output voltage for applications including Li-ion battery charging, lead-acid charging, and thermoelectric cooler (TEC) control. The device uses the same CSP/CSN current sense path and COMP compensation network, with mode selection determined by external feedback configuration - no additional components are required to switch between CC and CV operation.
What is the purpose of the FSET pin on the TPS922052DRRR, and how does it affect system design?
The FSET pin on the TPS922052DRRR sets the switching frequency from 100kHz to 2.2MHz via an external resistor to AGND. Lower frequencies (e.g., 100–400kHz) improve efficiency and thermal performance; higher frequencies (e.g., 1–2.2MHz) reduce inductor size and enable compact layouts. The resistor value directly determines frequency - for instance, 59kΩ yields 400kHz - and must be selected considering EMI targets, thermal limits, and passive component availability. The TPS922052DRRR does not require external clock synchronization.
How does the thermal foldback feature work on the TPS922052DRRR, and can it be disabled?
The TPS922052DRRR implements configurable thermal foldback via the TEMP pin: connecting a resistor to AGND sets the foldback starting temperature (e.g., 20kΩ → 130°C), while shorting TEMP to AGND disables foldback entirely. Unlike thermal shutdown (165°C), foldback gradually reduces LED current above the threshold to maintain operation under sustained overload - preserving illumination during temporary thermal stress. This behavior is fully analog and requires no digital interface or configuration registers.
Is the TPS922052DRRR pin-compatible with other members of the TPS92205x family, such as TPS922054DRRR?
No, the TPS922052DRRR is not pin-compatible with TPS922054DRRR. Although both use the WSON-12 package and share identical pin numbering and functions, the TPS922054DRRR has a higher 6A current limit and different internal current-sense threshold scaling - using it as a direct replacement would cause incorrect LED current regulation and potential overcurrent conditions. Always verify current-limit specification and sense-resistor calculation when substituting within the TPS92205x family.
TPS922052DRRR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN Exposed Pad
- 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:
- 12-WSON (3x3)
TPS922052DRRR FAQ
1.How can I place an order for TPS922052DRRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS922052DRRR 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 TPS922052DRRR reliable?
The price and inventory of TPS922052DRRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS922052DRRR is usually 5 days.
3.What payment methods are accepted for TPS922052DRRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS922052DRRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS922052DRRR?
TPS922052DRRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS922052DRRR 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 TPS922052DRRR?
For technical support, including TPS922052DRRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS922052DRRR requirements.
6.How does Aetrix verify that TPS922052DRRR is sourced from the original manufacturer or authorized distributors?
All TPS922052DRRR 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 TPS922052DRRR meets industry standards.
7.What is the process for return or replacement of TPS922052DRRR?
All TPS922052DRRR units undergo pre-shipment inspection (PSI). If there is an issue with TPS922052DRRR, 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 TPS922052DRRR part is unused and in its original packaging.
Return procedure for TPS922052DRRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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