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Texas Instruments TPS923654DMTR
- Part No.:
- TPS923654DMTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TPS923654DMTR.pdf
- Description:
- 65-V, 4-A BOOST OR BUCK-BOOST LE
- Quantity:
- Payment:
- Shipping:
Inventory:2,861
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Product details
Overview
TPS923654DMTR from Texas Instruments is a 65V, 4A non-synchronous boost/buck-boost LED driver with integrated 150mΩ low-side NMOS FET, 6.5A cycle-by-cycle current limit, and inductive fast dimming (IFD) support. It operates from 4.5V to 63V input, delivers up to 2A/4A LED output depending on topology, and enables ultra-fast PWM dimming with 150ns minimum pulse width - used in high-speed machine vision lighting and medical surgical illumination.
For engineers reviewing the TPS923654DMTR datasheet, TPS923654DMTR pinout, TPS923654DMTR application, or TPS923654DMTR equivalent, key selection criteria include its VSON-14 package thermal performance (RθJA = 39.1°C/W), configurable 100kHz–2.2MHz switching frequency via FSET resistor, hybrid dimming linearity at 20kHz (2,000:1 ratio), and absence of spread spectrum for optimized brightness stability in low-light precision applications.
Technical Context
The TPS923654DMTR implements adaptive off-time current mode control with smart sampling to enable inductive fast dimming (IFD), achieving high dimming accuracy across analog, PWM, hybrid, and flexible modes. Its error amplifier (gM = 265μA/V typical) drives an external compensation network on COMP pin, while CSP/CSN sense node provides 200mV ±3% current threshold with 1.17% duty-cycle resolution in analog dimming.
It integrates full protection: LED open/short detection via OVP pin, sense resistor fault monitoring, cycle-by-cycle current limiting, thermal foldback (configurable via TEMP pin resistor), and thermal shutdown at 165°C. The device supports common-cathode LED configuration and single-layer PCB layout, with VCC LDO (5.15V typical, 47mA limit) powering internal circuitry from VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 63V - supports wide-range industrial and automotive power rails without pre-regulation. |
| Max Output Current | 4A - achievable in buck-boost topology with proper thermal management and layout. |
| Switching FET RDS(on) | 150mΩ - enables high-efficiency operation at 4A with <1W conduction loss at 25°C. |
| Current Limit | 6.5A typical - provides robust overcurrent headroom for transient LED load surges. |
| Dimming Pulse Width | 150ns minimum - ensures precise timing control for strobe and machine vision flash applications. |
| Thermal Shutdown | 165°C with 15°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking. |
| Junction Temperature Range | –40°C to +125°C - qualified for industrial and outdoor lighting environments. |
Pinout & Package
VSON-14 package (4.5mm × 3.0mm, 0.45mm height) with exposed thermal pad for enhanced power dissipation. Pin 14 (SW) connects to inductor and Schottky diode; pins 1 and 2 (PGND/AGND) tie to thermal pad; pin 10 (COMP) requires external RC network for loop stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (14) | Switching node | Internal low-side NMOS drain - connects to inductor and flyback diode; carries high di/dt current. |
| CSP/CSN (13/12) | Current sense differential inputs | Monitor LED current via external sense resistor; 200mV threshold sets full-scale ILED. |
| FSET (9) | Frequency set input | Resistor-to-AGND sets switching frequency from 100kHz to 2.2MHz; determines EMI profile and efficiency trade-off. |
| EN/PWM (6) | Enable / PWM dimming input | High = enable; PWM signal = direct PWM dimming; rising edge triggers startup sequence after UVLO exit. |
| ADIM/HD (5) | Analog/hybrid dimming control | Pull low = hybrid dimming; PWM input = analog dimming; enables 2,000:1 ratio at 20kHz. |
| FAULT (7) | Open-drain fault indicator | Pulls low on LED open/short, thermal fault, or current-limit violation; requires external pull-up for system monitoring. |
| TEMP (8) | Thermal foldback configuration | Resistor-to-AGND sets foldback curve slope; disables foldback when shorted to AGND. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond LED current transitions using adaptive off-time control and smart sampling - critical for machine vision synchronization. |
| Hybrid Dimming Linearity | 2,000:1 dimming ratio at 20kHz PWM frequency with <±1% LED current error across 12.5–100% brightness range. |
| Configurable Thermal Foldback | Adjustable via single resistor on TEMP pin - allows custom derating curves to match heatsink capability and ambient conditions. |
| Common-Cathode LED Support | Eliminates need for high-side current sensing or floating gate drivers - simplifies PCB layout and reduces BOM cost. |
| Single-Layer PCB Compatibility | Optimized pinout and ground separation (PGND/AGND) enable functional designs without inner layers - lowers manufacturing cost. |
Applications
| Machine Vision Lighting | Medical Surgical Illumination |
|---|---|
Use Scenario: High-speed synchronized flash for industrial cameras capturing moving parts at >10k fps. IC Role / Device Role / Timing Role: LED driver with 150ns PWM pulse width control and IFD enabling microsecond-level current rise/fall for motion-free imaging. Use Value: Eliminates motion blur by matching LED on/off timing precisely to camera shutter, enabled by adaptive off-time control and fast current sensing. |
Use Scenario: Adjustable-intensity surgical headlight requiring flicker-free, stepless dimming from 1% to 100% brightness. IC Role / Device Role / Timing Role: Constant-current LED controller supporting hybrid dimming (2,000:1 at 20kHz) and analog dimming (256:1) with no visible artifacts. Use Value: Delivers clinically acceptable smoothness and zero-flicker performance across full dimming range, validated per IEC 62471 photobiological safety. |
| Professional Outdoor Lighting | LCD Backlighting |
Use Scenario: Streetlight with adaptive dimming based on ambient light and occupancy sensing. IC Role / Device Role / Timing Role: Wide-input (12–60V DC) boost/buck-boost driver supporting 4A output and thermal foldback for enclosure temperature management. Use Value: Maintains consistent lumen output over temperature (-40°C to +85°C ambient) via programmable thermal derating and 125°C junction rating. |
Use Scenario: High-brightness LCD backlight for industrial HMIs requiring CC/CV dual-mode operation. IC Role / Device Role / Timing Role: Dual-mode controller delivering constant current for LEDs and constant voltage for auxiliary circuits (e.g., TCON power). Use Value: Replaces separate CC and CV ICs - reduces board space and enables coordinated power sequencing for display startup reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS923655DMTR | Same VSON-14 package and 6.5A current limit, but includes spread spectrum (±7%, 2kHz modulation) for lower EMI. | Better suited for noise-sensitive environments (e.g., medical imaging electronics), but exhibits slight brightness variation in low-dimming regions. | Select TPS923655DMTR if EMI compliance (CISPR-25 Class 5) is prioritized over absolute dimming stability at <1% duty cycle. |
| TPS923652DMTR | Same VSON-14 package but 3A current limit and no spread spectrum; identical pinout and control interface. | Targeted for lower-power LED arrays (<2A) where thermal margin and cost are primary constraints. | Choose TPS923652DMTR for cost-optimized designs with ≤2A output and no requirement for >4A peak current capability. |
Compared with TPS923654DMTR, TPS923655DMTR adds spread spectrum at the expense of minor brightness ripple in analog dimming, while TPS923652DMTR reduces current capability by 3.5A but retains identical footprint and control logic - enabling scalable design reuse across power tiers.
Availability
TPS923654DMTR is available at Aetrix Electronics and suitable for machine vision systems, medical surgical lighting, outdoor LED luminaires, and LCD backlighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS923654DMTR 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and high-reliability ICs.
The TPS92365x product line is designed for high-performance LED lighting and power conversion applications demanding wide input range, fast dimming, and integrated protection - targeting industrial, medical, and automotive-grade systems.
FAQ
What is the maximum continuous LED output current supported by the TPS923654DMTR?
The TPS923654DMTR supports up to 4A continuous LED output current in buck-boost configuration under proper thermal conditions (TJ ≤ 125°C, RθJA = 39.1°C/W, 4-layer PCB). Its 6.5A typical cycle-by-cycle current limit provides headroom for transient loads. Actual output depends on input voltage, output voltage, inductor selection, and PCB thermal design - refer to Figure 6-1 and Figure 6-2 in the datasheet for derating curves.
Does the TPS923654DMTR support both constant-current and constant-voltage operation?
Yes, the TPS923654DMTR supports dual-mode CC/CV operation. In constant-current mode, it regulates LED current via CSP/CSN sense resistor feedback. In constant-voltage mode, it regulates output voltage using the OVP pin with external resistor divider - enabling use cases like battery charging and TEC control. Mode selection is automatic based on load conditions and feedback configuration.
How does the thermal foldback function work on the TPS923654DMTR?
The TPS923654DMTR's thermal foldback is configured via a resistor between TEMP pin and AGND. A 20kΩ resistor sets foldback start at 130°C; higher resistance delays activation, lower resistance advances it. Once triggered, output current linearly decreases to prevent thermal runaway. The feature is disabled when TEMP is shorted to AGND - allowing full current until thermal shutdown at 165°C.
What dimming methods does the TPS923654DMTR support, and how are they selected?
The TPS923654DMTR supports four dimming modes: PWM (150ns min pulse), analog (256:1), hybrid (2,000:1 at 20kHz), and flexible (1,000,000:1 at 120Hz). Selection is determined at startup by logic states on EN/PWM and ADIM/HD pins per Table 7-2. No register programming is required - configuration is static and hardware-defined via simple GPIO signals.
Is the TPS923654DMTR pin-compatible with other devices in the TPS92365x family?
Yes, the TPS923654DMTR in VSON-14 package shares identical pinout and electrical interface with TPS923652DMTR and TPS923655DMTR. All three support the same control signals, protection features, and external component requirements. Differences are limited to current limit (3A/6.5A/6.5A) and spread spectrum (disabled/enabled/enabled), making them drop-in replacements for power-scaling or EMI optimization.
TPS923654DMTR 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), Step-Up (Boost)
- 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)
TPS923654DMTR FAQ
1.How can I place an order for TPS923654DMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS923654DMTR 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 TPS923654DMTR reliable?
The price and inventory of TPS923654DMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS923654DMTR is usually 5 days.
3.What payment methods are accepted for TPS923654DMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS923654DMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS923654DMTR?
TPS923654DMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS923654DMTR 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 TPS923654DMTR?
For technical support, including TPS923654DMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS923654DMTR requirements.
6.How does Aetrix verify that TPS923654DMTR is sourced from the original manufacturer or authorized distributors?
All TPS923654DMTR 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 TPS923654DMTR meets industry standards.
7.What is the process for return or replacement of TPS923654DMTR?
All TPS923654DMTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS923654DMTR, 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 TPS923654DMTR part is unused and in its original packaging.
Return procedure for TPS923654DMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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