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Texas Instruments TPS922055DRRR
- Part No.:
- TPS922055DRRR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
TPS922055DRRR.pdf
- Description:
- 65-V, 4-A BUCK LED DRIVER WITH I
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
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Product details
Overview
TPS922055DRRR from Texas Instruments is a 4A 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 and delivers constant-current regulation for high-brightness lighting and battery charging applications.
For engineers reviewing the TPS922055DRRR datasheet, TPS922055DRRR pinout, TPS922055DRRR application, or TPS922055DRRR equivalent, key selection considerations include its 6A cycle-by-cycle current limit, spread spectrum EMI reduction, 150ns minimum PWM pulse width, hybrid dimming up to 1,000,000:1 at 120Hz, and WSON-12 thermal-pad package for industrial-grade thermal management.
Technical Context
The TPS922055DRRR implements adaptive off-time current-mode control with configurable switching frequency (100kHz–2.2MHz) set via external resistor on FSET pin. Its error amplifier output (COMP) interfaces with an external RC network to tune loop bandwidth and stability across varying LED loads and input conditions.
Inductive Fast Dimming (IFD) is enabled by smart sampling and dual-path dimming logic: analog dimming (8-bit resolution, 256:1) via ADIM/HD pin, and ultra-fast PWM dimming (150ns min pulse) via EN/PWM pin - both coordinated under hybrid or flexible dimming modes for >1M:1 dynamic range at low frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 63V - supports wide-range industrial, automotive, and mains-derived supplies without pre-regulation. |
| Max Output Current | 4A continuous - determined by thermal design and PCB layout; enables high-lumen LED strings or CC/CV battery charging. |
| Current Limit | 6A typical cycle-by-cycle - protects internal FET during startup, short-circuit, or transient overloads. |
| Switching Frequency | 100kHz to 2.2MHz - adjustable via FSET resistor; higher frequencies reduce inductor size, lower frequencies improve efficiency. |
| Dimming Accuracy | Hybrid dimming 1,000,000:1 at 120Hz - achieved by combining analog regulation (high-brightness) and PWM switching (low-brightness). |
| Thermal Protection | Configurable thermal foldback + 165°C shutdown - RTEMP resistor sets foldback curve; thermal pad ensures <47.4°C/W θJA in WSON-12. |
| EMI Reduction | Enabled spread spectrum (±7%, 2kHz modulation) - reduces peak emissions at fundamental and harmonics without external filters. |
Pinout & Package
TPS922055DRRR uses a 12-pin WSON package (3.0mm × 3.0mm) with exposed thermal pad (PGND/AGND). The package supports single-layer PCB routing and high-power density layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects to inductor and Schottky diode; carries high di/dt current; requires tight layout and ground plane coupling. |
| CSP / CSN | Current sense inputs | Differential pair measuring voltage across external RSENSE; 200mV threshold sets full-scale LED current. |
| VIN | Main power input | Accepts 4.5–63V; feeds internal LDO (VCC) and high-side gate drive; requires local 10µF ceramic input capacitor. |
| VCC | Internal LDO output | 5.15V ±0.15V regulated supply; powers internal circuitry; requires 1µF capacitor to AGND for soft-start timing. |
| EN/PWM | Enable & PWM input | Active-high enable; accepts 150ns min PWM pulses for direct dimming control; threshold 0.4V/1.2V logic levels. |
| ADIM/HD | Analog/hybrid dimming select | Pull-low for hybrid dimming; PWM input for analog dimming; high for PWM-only mode; defines dimming architecture at startup. |
| FAULT | Open-drain fault indicator | Asserts low on LED open/short, thermal shutdown, or FET failure; requires external pull-up for system-level fault reporting. |
| FSET | Frequency set input | Resistor-to-AGND sets switching frequency (e.g., 59kΩ = 400kHz); floating pin disables switching. |
| TEMP | Thermal foldback control | Resistor-to-AGND configures foldback curve; direct AGND connection disables foldback. |
| COMP | Error amplifier output | Connects to external RC compensation network; determines loop stability and transient response for current regulation. |
| UVP | LED open-detection threshold | Resistor divider sets LED open-voltage threshold; floating disables UVP protection. |
| PGND / AGND / Thermal Pad | Power & analog ground | Shared thermal pad serves as PGND and AGND; must be soldered to large copper area for thermal and noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables 1,000,000:1 dimming ratio at 120Hz by seamlessly blending analog regulation (12.5–100% brightness) and PWM switching (0–12.5%). |
| Integrated 150mΩ NMOS FET | Eliminates external switch; supports 4A continuous output with minimal conduction loss and simplified BOM. |
| Spread Spectrum EMI Reduction | ±7% frequency dither at 2kHz modulates spectral energy, reducing peak EMI by >10dB and easing compliance with CISPR-25 Class 5. |
| Four Configurable Dimming Modes | Single-pin logic configuration (EN/PWM + ADIM/HD) selects PWM, analog, hybrid, or flexible dimming - no firmware or I²C required. |
| Full System Protection Suite | Includes LED open/short, CSP/CSN resistor fault, thermal foldback, cycle-by-cycle current limit, and thermal shutdown with fault pin assertion. |
Applications
| Machine Vision Lighting | Medical Surgical Lighting |
|---|---|
Use Scenario: High-speed, strobed illumination synchronized to camera exposure for defect detection in automated inspection systems. IC Role / Device Role / Timing Role: Constant-current LED driver with 150ns PWM response enabling precise sub-microsecond flash timing and repeatable intensity. Use Value: Eliminates motion blur and ensures consistent photon delivery across frame rates up to 10kHz using hybrid dimming at 120Hz. |
Use Scenario: Adjustable-intensity surgical headlamps requiring flicker-free, color-stable illumination during prolonged procedures. IC Role / Device Role / Timing Role: Analog dimming controller delivering smooth 256:1 brightness control without audible noise or EMI interference. Use Value: Maintains CCT stability and eliminates PWM-induced visual artifacts through DC-like current regulation with <1% ripple. |
| Industrial Battery Charging | LCD Backlighting |
Use Scenario: Constant-current/constant-voltage charging of LiFePO₄ or lead-acid batteries in portable medical or test equipment. IC Role / Device Role / Timing Role: Dual-mode CC/CV regulator leveraging same current-sense architecture used for LED driving. Use Value: Reduces BOM count by reusing LED driver IC for battery charge control - validated down to 0.1A with external RSENSE scaling. |
Use Scenario: High-dynamic-range backlight for industrial displays operating in variable ambient light (e.g., outdoor kiosks, avionics). IC Role / Device Role / Timing Role: Fast-response current source supporting 10,000:1 dimming at 4kHz for local dimming zones. Use Value: Achieves >100,000 nits peak brightness while maintaining black-level integrity via hybrid dimming linearity <±1.5%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS922053DRRR | Same WSON-12 package and 3A current limit; includes spread spectrum but lacks 6A current capability. | Suitable for ≤3A LED strings where EMI is critical but peak current demand is lower. | Select when system thermal budget limits 4A operation and spread spectrum is mandatory. |
| LM3409HVMM/NOPB | External MOSFET driver; 65V max input; no integrated FET; no hybrid dimming or spread spectrum. | Requires external high-side switch and separate dimming circuitry; suited for custom high-efficiency designs. | Choose when board space allows discrete FET placement and full analog/PWM flexibility is needed beyond IFD. |
Compared with TPS922055DRRR, TPS922053DRRR offers identical EMI reduction but lower current capacity, while LM3409HVMM/NOPB provides greater thermal scalability at the cost of BOM complexity and dimming feature depth.
Availability
TPS922055DRRR is available at Aetrix Electronics and suitable for machine vision lighting, medical surgical lighting, and industrial battery charging requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS922055DRRR 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 ICs, with decades of expertise in LED driver innovation and automotive-grade reliability.
The TPS92205x product line was designed for high-dynamic-range, high-reliability LED lighting and dual-mode (CC/CV) power conversion in industrial, medical, and machine vision systems - prioritizing dimming fidelity, thermal robustness, and EMI resilience.
FAQ
What is the maximum continuous output current supported by the TPS922055DRRR?
The TPS922055DRRR supports 4A continuous output current under typical thermal conditions using the WSON-12 package with proper PCB copper area. Its 6A cycle-by-cycle current limit protects against transients, but sustained operation above 4A requires enhanced heatsinking or forced airflow to maintain junction temperature below 125°C.
Does the TPS922055DRRR support constant-voltage (CV) mode for battery charging?
Yes, the TPS922055DRRR supports CC/CV charging mode. When configured with appropriate feedback resistors and UVP settings, it regulates output voltage after reaching programmed current limit - enabling single-chip LiFePO₄ or lead-acid battery charging without external controllers.
How does the spread spectrum feature function in the TPS922055DRRR?
The TPS922055DRRR implements spread spectrum by modulating the switching frequency ±7% around the center value (set by FSET resistor) at 2kHz. This dithers spectral energy, lowering peak EMI amplitude and easing compliance with CISPR-25 and FCC Part 15 requirements without added filtering components.
What is the minimum PWM pulse width the TPS922055DRRR can reliably detect for dimming control?
The TPS922055DRRR supports a minimum PWM pulse width of 150ns on the EN/PWM pin for direct PWM dimming. This enables microsecond-precision strobing in machine vision and high-frequency flicker-free operation - verified across temperature and supply voltage ranges per TI's SLVSGG9B datasheet.
Can the TPS922055DRRR operate with a single-layer PCB layout?
Yes, the TPS922055DRRR supports single-layer PCB design due to its common-anode LED topology and integrated low-side FET. Layout guidelines recommend direct thermal pad soldering to a large copper pour, minimized SW loop area, and separation of analog (COMP, TEMP) and power (SW, VIN) traces - all validated in TI's reference design TIDA-01637.
TPS922055DRRR 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):
- 65V
- Voltage - Output:
- 0V ~ 63V
- Current - Output / Channel:
- 4A
- 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)
TPS922055DRRR FAQ
1.How can I place an order for TPS922055DRRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS922055DRRR 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 TPS922055DRRR reliable?
The price and inventory of TPS922055DRRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS922055DRRR is usually 5 days.
3.What payment methods are accepted for TPS922055DRRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS922055DRRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS922055DRRR?
TPS922055DRRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS922055DRRR 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 TPS922055DRRR?
For technical support, including TPS922055DRRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS922055DRRR requirements.
6.How does Aetrix verify that TPS922055DRRR is sourced from the original manufacturer or authorized distributors?
All TPS922055DRRR 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 TPS922055DRRR meets industry standards.
7.What is the process for return or replacement of TPS922055DRRR?
All TPS922055DRRR units undergo pre-shipment inspection (PSI). If there is an issue with TPS922055DRRR, 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 TPS922055DRRR part is unused and in its original packaging.
Return procedure for TPS922055DRRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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