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Texas Instruments TPS922055MDMTR
- Part No.:
- TPS922055MDMTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TPS922055MDMTR.pdf
- Description:
- 65-V, 4-A BUCK LED DRIVER WITH I
- Quantity:
- Payment:
- Shipping:
Inventory:2,350
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Product details
Overview
TPS922055MDMTR 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, operates up to 2.2MHz switching frequency with spread spectrum, and delivers 2,000:1 hybrid dimming at 20kHz PWM for high-precision illumination control in machine vision and medical lighting.
For engineers reviewing the TPS922055MDMTR datasheet, TPS922055MDMTR pinout, TPS922055MDMTR application, or TPS922055MDMTR equivalent, this page provides verified functional identity, VSON-14 package mapping, confirmed 6A current limit, thermal foldback configurability, and real-world dimming performance data - all extracted from TI's production-grade SLVSGG9B datasheet (Feb 2025 revision).
Technical Context
The TPS922055MDMTR implements adaptive off-time current mode control with smart sampling to enable inductive fast dimming (IFD), achieving 150ns minimum PWM pulse width and 1,000,000:1 dimming ratio at 120Hz. Its dual-input dimming logic (EN/PWM and ADIM/HD pins) configures four distinct modes - analog, PWM, hybrid, and flexible - without external microcontroller intervention.
It integrates constant-current (CC) and constant-voltage (CV) regulation, supports LED open/short, FET open/short, and thermal shutdown protections, and features a configurable thermal foldback curve via the TEMP pin with –55°C to 125°C operating junction temperature range - extended versus standard 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 rails without pre-regulation. |
| Max Output Current | 4A continuous - enables high-brightness single-string LED arrays or multi-string configurations with external sensing. |
| Current Limit | 6A typical cycle-by-cycle - ensures robust overcurrent protection during transient load or short-circuit events. |
| Switching Frequency | 100kHz to 2.2MHz - adjustable via FSET resistor; higher frequencies reduce inductor size, lower frequencies improve efficiency. |
| Dimming Accuracy | 2,000:1 at 20kHz hybrid mode - achieves precise brightness control for machine vision strobes and surgical lighting. |
| Junction Temp Range | –55°C to 125°C - extended low-temp rating enables operation in cold-storage lighting and outdoor signage. |
| Spread Spectrum | Enabled - ±7% frequency dithering at 2kHz reduces EMI peak emissions and eases EMC compliance. |
Pinout & Package
VSON-14 package (4.5mm × 3.0mm, 0.5mm pitch) with exposed thermal pad; optimized for single-layer PCB layout and high-power density LED driver designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND / AGND | Power & analog ground | Separate ground paths minimize noise coupling between power stage and error amplifier; thermal pad tied to both. |
| VIN | Main input supply | Accepts 4.5V–65V; powers internal LDO and switching FET; UVLO threshold at 3.0V (rising). |
| VCC | Internal LDO output | 5.15V regulated output; requires 1μF capacitor to AGND; soft-start time depends on capacitance value. |
| EN/PWM | Enable or PWM input | Pull high for always-on; apply PWM signal for direct dimming; 150ns min pulse width supported. |
| ADIM/HD | Analog/hybrid dimming control | Pull low for hybrid dimming; apply PWM for analog dimming; determines dimming method at startup. |
| FAULT | Open-drain fault indicator | Asserts low on LED open/short, thermal shutdown, or FET failure; requires external pull-up. |
| TEMP | Thermal foldback setpoint | Resistor-to-AGND sets foldback curve; direct AGND connection disables foldback. |
| FSET | Frequency configuration | Resistor-to-AGND selects switching frequency from 100kHz to 2.2MHz; 59kΩ = 400kHz. |
| COMP | Error amplifier output | Connect RC network to AGND to set loop bandwidth and stability; critical for transient response. |
| CSP / CSN | Current sense inputs | Differential pair senses voltage across external RSENSE; 200mV full-scale reference sets LED current. |
| SW | Switching node | Drives external inductor; connects internally to low-side NMOS; requires low-inductance layout. |
| UVP | LED open detection | Resistor divider sets LED open threshold; floating disables detection. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables 150ns PWM pulses and sub-millisecond brightness transitions - essential for strobe and machine vision timing. |
| Hybrid Dimming Architecture | Combines analog control (12.5–100% brightness) with PWM (0–12.5%) to achieve 1,000,000:1 ratio at 120Hz without flicker. |
| Configurable Thermal Foldback | Adjustable via TEMP pin resistor; prevents thermal runaway while maintaining partial output during overheating. |
| Integrated 150mΩ Low-Side FET | Eliminates external MOSFET and gate driver; reduces BOM count and layout complexity for compact LED drivers. |
| CC/CV Dual-Mode Operation | Supports battery charging and TEC control alongside LED driving - enabling multi-function power stage reuse. |
Applications
| Machine Vision Strobe | Medical Surgical Lighting |
|---|---|
Use Scenario: High-speed camera synchronization requiring microsecond-level LED turn-on/turn-off timing in automated inspection systems. IC Role / Device Role / Timing Role: Primary LED current controller with inductive fast dimming (IFD) enabling 150ns pulse-width accuracy and <1µs transition times. Use Value: Eliminates motion blur in 10k+ fps imaging by delivering deterministic, jitter-free LED drive synchronized to camera trigger signals. |
Use Scenario: Adjustable-intensity surgical headlamps requiring flicker-free, color-stable illumination across 0.01%–100% brightness range. IC Role / Device Role / Timing Role: Constant-current LED driver with hybrid dimming supporting 1,000,000:1 ratio at 120Hz and thermal foldback for safe prolonged operation. Use Value: Enables surgeon-selectable brightness without perceptible flicker or color shift, meeting IEC 60601-2-57 photobiological safety requirements. |
| Outdoor Signage Power Supply | LCD Backlight Driver |
Use Scenario: Wide-input-range LED driver for highway digital billboards exposed to –40°C to +85°C ambient and 12–48V vehicle/bus power buses. IC Role / Device Role / Timing Role: Buck LED controller with –55°C to 125°C junction rating, spread spectrum EMI reduction, and LED open/short protection. Use Value: Ensures reliable 24/7 operation under extreme thermal cycling and variable input voltage without derating or external supervision. |
Use Scenario: High-efficiency CC/CV source for edge-lit LCD backlights in commercial displays requiring precise luminance control and low ripple. IC Role / Device Role / Timing Role: Dual-mode regulator delivering constant current for LEDs and constant voltage for auxiliary circuits (e.g., TCON power). Use Value: Reduces component count by consolidating backlight and system power rails into one IC, lowering BOM cost and board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS922055DMTR | Same VSON-14 package and spread spectrum, but rated for –40°C to 125°C junction temperature (vs. –55°C for MDMTR). | Suitable for standard industrial environments; not qualified for extended low-temperature deployment. | Select when operating below –40°C is not required and cost optimization is prioritized. |
| TPS922054MDMTR | Same –55°C to 125°C rating and VSON-14 package, but spread spectrum disabled and 6A current limit retained. | Better EMI predictability in noise-sensitive RF environments; no frequency dithering. | Select when strict EMI spectral control is needed and spread spectrum is undesirable. |
Compared with TPS922055MDMTR, TPS922055DMTR trades extended low-temperature capability for lower cost, while TPS922054MDMTR retains the –55°C rating but removes spread spectrum - offering deterministic EMI behavior at the expense of peak emission reduction.
Availability
TPS922055MDMTR is available at Aetrix Electronics and suitable for machine vision strobes, medical surgical lighting, outdoor signage, LCD backlighting, and battery charging applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS922055MDMTR 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 specifically for high-dynamic-range LED illumination systems requiring inductive fast dimming, wide input voltage tolerance, and integrated protection - targeting medical, industrial, and professional lighting markets.
FAQ
What is the maximum continuous output current of the TPS922055MDMTR?
The TPS922055MDMTR delivers 4A continuous LED current with a typical 6A cycle-by-cycle current limit. This rating is validated across its full –55°C to 125°C junction temperature range and supports high-brightness single-string or parallel-string LED configurations using an external sense resistor. The 150mΩ integrated low-side FET enables efficient operation without external switching components.
Does the TPS922055MDMTR support analog dimming, and what resolution does it offer?
Yes, the TPS922055MDMTR supports analog dimming via the ADIM/HD pin with 8-bit resolution (0.4% duty cycle step), enabling 256:1 dimming range. It interprets PWM input at the ADIM/HD pin to adjust the internal 200mV reference proportionally - for example, 10% duty cycle yields ~20mV reference, resulting in ~10% LED current. Minimum ADIM pulse width is 100ns after initial setup.
How does the spread spectrum feature work in the TPS922055MDMTR?
The TPS922055MDMTR implements spread spectrum modulation with ±7% frequency deviation around the configured central switching frequency (set via FSET resistor) and a 2kHz modulation rate. This dithering spreads energy across a wider band, reducing peak EMI amplitudes at the fundamental and harmonics - easing compliance with CISPR-11/32 Class B limits without increasing filter component size or cost.
What is the purpose of the TEMP pin on the TPS922055MDMTR?
The TEMP pin on the TPS922055MDMTR configures the thermal foldback curve by connecting an external resistor to AGND. Different resistor values set distinct foldback onset temperatures and slope characteristics - allowing designers to tailor thermal derating behavior to mechanical layout, heatsinking, and ambient conditions. Leaving the pin floating disables foldback; connecting directly to AGND also disables it.
Can the TPS922055MDMTR be used for battery charging applications?
Yes, the TPS922055MDMTR supports constant-voltage (CV) mode in addition to constant-current (CC) mode, making it suitable for lithium-ion, lead-acid, and TEC control applications. Its wide 4.5V–65V input range, integrated 6A-capable FET, and comprehensive protection suite (including cycle-by-cycle current limit and thermal shutdown) enable robust, single-chip charging solutions without external controllers.
TPS922055MDMTR 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)
TPS922055MDMTR FAQ
1.How can I place an order for TPS922055MDMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS922055MDMTR 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 TPS922055MDMTR reliable?
The price and inventory of TPS922055MDMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS922055MDMTR is usually 5 days.
3.What payment methods are accepted for TPS922055MDMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS922055MDMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS922055MDMTR?
TPS922055MDMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS922055MDMTR 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 TPS922055MDMTR?
For technical support, including TPS922055MDMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS922055MDMTR requirements.
6.How does Aetrix verify that TPS922055MDMTR is sourced from the original manufacturer or authorized distributors?
All TPS922055MDMTR 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 TPS922055MDMTR meets industry standards.
7.What is the process for return or replacement of TPS922055MDMTR?
All TPS922055MDMTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS922055MDMTR, 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 TPS922055MDMTR part is unused and in its original packaging.
Return procedure for TPS922055MDMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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