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Texas Instruments TPS922055DMTR
- Part No.:
- TPS922055DMTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TPS922055DMTR.pdf
- Description:
- 65-V, 4-A BUCK LED DRIVER WITH I
- Quantity:
- Payment:
- Shipping:
Inventory:1,945
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Product details
Overview
TPS922055DMTR from Texas Instruments is a 65V, 4A non-synchronous buck LED driver with integrated 150mΩ low-side NMOS FET, spread spectrum EMI reduction, and inductive fast dimming (IFD) support. It delivers constant-current LED drive or constant-voltage battery/TEC control across 4.5–63V input, targeting high-precision machine vision strobes and medical surgical lighting.
For engineers reviewing the TPS922055DMTR datasheet, TPS922055DMTR pinout, TPS922055DMTR application, or TPS922055DMTR equivalent, this page provides verified package mapping (VSON-14), confirmed 6A cycle-by-cycle current limit, spread spectrum enablement, hybrid dimming linearity up to 10,000:1 at 4kHz, and thermal foldback configurability via TEMP pin.
Technical Context
The TPS922055DMTR implements adaptive off-time current mode control with smart sampling for inductive fast dimming (IFD), enabling sub-150ns PWM pulse handling and high-accuracy analog/hybrid dimming. Its integrated 150mΩ NMOS supports up to 6A peak current, and the FSET pin sets switching frequency from 100kHz to 2.2MHz with ±7% spread spectrum modulation.
It features dual ground separation (PGND/AGND), LED common-anode topology, and configurable protection including LED open/short, sense resistor fault, thermal foldback (via external RTEMP), and thermal shutdown at 165°C. The FAULT pin provides open-drain fault signaling with immediate response on any detected failure condition.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 63V - Supports wide-input industrial and automotive LED systems without pre-regulation. |
| Max Output Current | 4A continuous / 6A peak - Enables high-brightness LED strings or battery charging up to 24W at 6V output. |
| Switching Frequency | 100kHz–2.2MHz (FSET-programmable) - Allows layout optimization: lower fSW for efficiency, higher fSW for compact magnetics. |
| Dimming Resolution | 2,000:1 (20kHz PWM), 10,000:1 (4kHz PWM), 1,000,000:1 (120Hz PWM) - Achieves ultra-deep dimming for medical imaging and machine vision. |
| Current Sense Threshold | 200mV ±3mV - Enables precise LED current regulation with <±1.5% tolerance using standard 1% RSENSE. |
| Thermal Shutdown | 165°C with 15°C hysteresis - Prevents thermal runaway while allowing safe recovery after transient overload. |
| Spread Spectrum | Enabled (±7%, 2kHz modulation) - Reduces EMI peak emissions by >10dB, easing compliance with CISPR-11 Class B. |
Pinout & Package
VSON-14 package (4.5mm × 3.0mm, 0.5mm pitch) with exposed thermal pad (PGND/AGND). Pin 1 = PGND, Pin 2 = AGND, Pin 3 = VIN, Pin 4 = VCC, Pin 5 = ADIM/HD, Pin 6 = EN/PWM, Pin 7 = FAULT, Pin 8 = TEMP, Pin 9 = FSET, Pin 10 = COMP, Pin 11 = UVP, Pin 12 = CSP, Pin 13 = CSN, Pin 14 = SW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND / AGND | Power & analog ground reference | Separate ground paths minimize noise coupling between power switching and feedback loop; thermal pad must be soldered for thermal performance. |
| VIN | Main power input | Accepts 4.5–63V; powers internal LDO and switch; requires local 10µF ceramic input capacitor near pin. |
| VCC | Internal LDO output | 5.15V ±0.15V regulated supply for logic; requires 1µF capacitor to AGND; soft-start time depends on capacitance value. |
| ADIM/HD | Dimming mode selector & analog input | Pull low for hybrid dimming; apply PWM for analog dimming; determines dimming method at startup based on logic state. |
| EN/PWM | Enable control & PWM input | High = always-on; low = disable; PWM signal enables PWM/hybrid/flexible dimming; minimum 150ns pulse width supported. |
| FAULT | Open-drain fault indicator | Asserts low on LED open/short, thermal fault, or current-limit violation; requires external pull-up for system-level fault detection. |
| TEMP | Thermal foldback configuration | Connect external resistor to AGND to set foldback start temperature (e.g., 20kΩ → 130°C); direct AGND connection disables foldback. |
| FSET | Switching frequency programming | Resistor to AGND sets fSW (e.g., 59kΩ = 400kHz); enables EMI optimization and inductor size trade-off. |
| COMP | Error amplifier output | Connect RC network to AGND to set compensation bandwidth; stabilizes current loop across LED string variations and temperature. |
| CSP / CSN | High-side current sense inputs | Differential pair measuring voltage across external RSENSE; 200mV threshold enables accurate current setting with minimal power loss. |
| SW | Switching node | Drives external inductor and catch diode; connects internally to 150mΩ NMOS; requires low-inductance layout to minimize ringing. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables 150ns minimum PWM pulse width and <10µs dimming response time - critical for synchronized machine vision flash timing. |
| Hybrid Dimming Architecture | Combines analog dimming (12.5–100% brightness) with PWM dimming (0–12.5%) to achieve 10,000:1 ratio at 4kHz - eliminates flicker in high-speed inspection. |
| Configurable Thermal Foldback | Adjustable via single resistor on TEMP pin - allows custom thermal derating curves for sealed enclosures or high-ambient environments. |
| Integrated 150mΩ NMOS Switch | Eliminates external MOSFET and gate driver - reduces BOM count, PCB area, and layout complexity for single-layer designs. |
| LED Common-Anode Topology | Supports multi-string configurations with shared anode rail - simplifies wiring in architectural and stage lighting systems. |
| Full Fault Protection Suite | Includes LED open/short, sense resistor fault, cycle-by-cycle current limit, and thermal shutdown - ensures robust operation in unattended applications. |
Applications
| Machine Vision Strobe | Medical Surgical Lighting |
|---|---|
|
Use Scenario: High-speed camera illumination synchronized to exposure windows in automated optical inspection (AOI) systems. IC Role / Device Role / Timing Role: Constant-current LED driver with 150ns PWM edge response and IFD-enabled brightness control. Use Value: Eliminates motion blur by delivering precise, repeatable light pulses aligned to µs-level camera triggers. |
Use Scenario: Adjustable-intensity surgical headlight requiring flicker-free, color-stable illumination during procedures. IC Role / Device Role / Timing Role: Hybrid dimming controller supporting 10,000:1 range at 4kHz to avoid perceptible flicker. Use Value: Enables smooth, silent dimming without audible coil whine or visible artifacts under magnification. |
| Fire Alarm Strobe | LCD Backlighting |
|
Use Scenario: High-intensity emergency strobe compliant with UL 1971 and NFPA 72 visibility requirements. IC Role / Device Role / Timing Role: Instant-on LED driver with CC/CV capability and thermal foldback for sustained pulsing. Use Value: Delivers certified lumen output over full temperature range (-40°C to +85°C ambient) with automatic derating. |
Use Scenario: Energy-efficient edge-lit LCD backlight for industrial HMIs and medical displays. IC Role / Device Role / Timing Role: Constant-current source with analog dimming (256:1) and flexible dimming modes. Use Value: Maintains consistent luminance and color point across 10–100% brightness while minimizing power consumption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS922053DMTR | Same VSON-14 package and spread spectrum, but 3A/6A current limit reduced to 3A typical (vs. 6A typical for TPS922055DMTR). | Lower peak current limits maximum LED string power to ~18W (vs. 24W for TPS922055DMTR); suitable for medium-brightness signage. | Select when thermal budget or cost constraints prioritize lower IOUT and reduced RDS(on) stress. |
| TPS922054DMTR | Same VSON-14 package and 6A current limit, but spread spectrum disabled - higher EMI baseline, no ±7% frequency dithering. | Better low-brightness stability in sensitive analog imaging systems where spread spectrum could induce jitter in timing-critical PWM edges. | Select when EMI filtering is already sufficient and deterministic dimming timing outweighs spectral spreading benefits. |
Compared with TPS922053DMTR and TPS922054DMTR, the TPS922055DMTR uniquely combines 6A current capability with enabled spread spectrum - making it optimal for high-power, EMI-sensitive applications like industrial strobes and medical lighting where both output headroom and EMC compliance are mandatory.
Availability
TPS922055DMTR is available at Aetrix Electronics and suitable for machine vision strobes, medical surgical lighting, fire alarm systems, and LCD backlighting requiring stable component supply and long-term production continuity.
Supply support for TPS922055DMTR 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 high-reliability LED driver design.
The TPS92205x product line was engineered specifically for high-dynamic-range LED applications demanding precision dimming, wide input range, and integrated protection - targeting industrial, medical, and safety-critical illumination systems.
FAQ
What is the maximum continuous output current supported by the TPS922055DMTR?
The TPS922055DMTR supports 4A continuous output current with 6A cycle-by-cycle current limiting. This rating assumes proper PCB thermal design using the VSON-14 package's exposed thermal pad and operation within the –40°C to +125°C junction temperature range per datasheet Section 6.3.
Does the TPS922055DMTR support spread spectrum frequency modulation?
Yes, the TPS922055DMTR has spread spectrum enabled by default - delivering ±7% frequency dithering at 2kHz modulation rate to reduce EMI peaks. This feature distinguishes it from the TPS922054DMTR (no spread spectrum) and TPS922052DMTR (no spread spectrum), and is confirmed in the Device Comparison Table (Section 4) of the SLVSGG9B datasheet.
How does the TPS922055DMTR achieve 10,000:1 dimming ratio at 4kHz?
The TPS922055DMTR achieves 10,000:1 dimming at 4kHz using hybrid dimming: analog dimming controls brightness from 12.5% to 100%, while PWM dimming handles 0% to 12.5%. This dual-mode architecture avoids low-duty-cycle instability and preserves timing accuracy - a capability explicitly specified for TPS922055DMTR in Section 1 Features and Figure 6-4 of the datasheet.
What package type is used for the TPS922055DMTR, and what are its thermal characteristics?
The TPS922055DMTR uses the VSON-14 package (4.5mm × 3.0mm, 0.5mm pitch) with exposed thermal pad. Its junction-to-board thermal resistance (RθJB) is 14.7°C/W, and junction-to-ambient (RθJA) is 39.1°C/W - values confirmed in Section 6.4 Thermal Information of the SLVSGG9B datasheet and optimized for single-layer PCB layouts with adequate copper pour.
Can the TPS922055DMTR be used for battery charging applications?
Yes, the TPS922055DMTR supports CC/CV charging mode and is explicitly listed for "battery charging" in Section 2 Applications. Its constant-voltage regulation, programmable current limit, thermal foldback, and fault reporting make it suitable for Li-ion or lead-acid charging stages - provided external circuitry meets battery-specific termination and safety requirements.
TPS922055DMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-VDFN 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, Wettable Flank
- Supplier Device Package:
- 14-VSON (4.5x3)
TPS922055DMTR FAQ
1.How can I place an order for TPS922055DMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS922055DMTR 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 TPS922055DMTR reliable?
The price and inventory of TPS922055DMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS922055DMTR is usually 5 days.
3.What payment methods are accepted for TPS922055DMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS922055DMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS922055DMTR?
TPS922055DMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS922055DMTR 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 TPS922055DMTR?
For technical support, including TPS922055DMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS922055DMTR requirements.
6.How does Aetrix verify that TPS922055DMTR is sourced from the original manufacturer or authorized distributors?
All TPS922055DMTR 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 TPS922055DMTR meets industry standards.
7.What is the process for return or replacement of TPS922055DMTR?
All TPS922055DMTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS922055DMTR, 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 TPS922055DMTR part is unused and in its original packaging.
Return procedure for TPS922055DMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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