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Texas Instruments TPS923654HMDMTR
- Part No.:
- TPS923654HMDMTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TPS923654HMDMTR.pdf
- Description:
- 65-V, 4-A BOOST OR BUCK-BOOST LE
- Quantity:
- Payment:
- Shipping:
Inventory:2,897
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Product details
Overview
TPS923654HMDMTR from Texas Instruments is a 65V, 8.5A non-synchronous boost/buck-boost LED driver with integrated low-side NMOS FET (150 mΩ), supporting inductive fast dimming (IFD), analog/PWM/hybrid/flexible dimming modes, and CC/CV operation - used in high-brightness medical lighting, machine vision flash, and LCD backlighting systems requiring precise current regulation and ultra-fast 150 ns PWM pulse handling.
For engineers reviewing the TPS923654HMDMTR datasheet, TPS923654HMDMTR pinout, TPS923654HMDMTR application, or TPS923654HMDMTR equivalent, this page delivers verified specifications, VSON-14 package details, thermal foldback configuration, fault signaling behavior, and dimming mode selection logic confirmed for the exact HMDMTR variant.
Technical Context
The TPS923654HMDMTR implements adaptive off-time current-mode control with configurable switching frequency (100 kHz–2.2 MHz via FSET resistor) and supports common-cathode LED topology with single-layer PCB compatibility. Its 8.5A cycle-by-cycle current limit and –55°C to +125°C operating junction temperature enable robust operation in industrial strobe and surgical lighting environments.
It features dual-input dimming control (EN/PWM and ADIM/HD pins), enabling four distinct dimming modes without external microcontroller intervention. The device uses smart sampling and internal 200 mV current-sense reference to achieve 2,000:1 hybrid dimming ratio at 20 kHz and 1,000,000:1 at 120 Hz - all while maintaining ±1.5% LED current accuracy over temperature and line variations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5 V to 63 V - supports wide-range industrial DC bus and automotive battery inputs without pre-regulation. |
| Max Switch Current Limit | 8.5 A typical - enables direct drive of high-power LED strings up to 4A output with margin for transient surges. |
| Current Sense Threshold | 200 mV ±3 mV - sets LED current via external RSENSE; enables ±1.5% regulation accuracy across temperature. |
| Dimming Pulse Width | 150 ns minimum - allows ultra-fast PWM dimming for machine vision synchronization and flicker-free imaging. |
| Operating Junction Temp | –55°C to +125°C - qualified for extended-temperature industrial and outdoor lighting applications. |
| Switching FET RDS(on) | 150 mΩ typical - reduces conduction loss and thermal stress in high-current boost configurations. |
| Fault Output Type | Open-drain - provides direct interface to MCU GPIO or system supervisor IC for real-time fault reporting. |
Pinout & Package
VSON-14 package (4.5 mm × 3.0 mm, 0.5 mm pitch) with exposed thermal pad; optimized for high-power density and thermal performance (RθJA = 39.1°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects to inductor and Schottky diode; carries full switching current and high dv/dt transients. |
| CSP / CSN | Current sense differential input | Measures LED current via external sense resistor; referenced to 200 mV internal threshold. |
| EN/PWM | Enable / PWM input | Configures startup and selects dimming mode; accepts 150 ns minimum pulses for direct PWM control. |
| ADIM/HD | Analog dimming / hybrid dimming select | Determines dimming architecture: high = PWM-only, low = hybrid, PWM signal = flexible/analog mode. |
| FAULT | Open-drain fault indicator | Pulls low on LED open/short, thermal shutdown, or FET fault; requires external pull-up for system monitoring. |
| TEMP | Thermal foldback programming | Resistor-to-AGND sets foldback curve slope; direct AGND connection disables thermal derating. |
| FSET | Frequency set input | Resistor-to-AGND configures switching frequency from 100 kHz to 2.2 MHz; enables EMI optimization. |
| COMP | Error amplifier output | External RC network sets loop bandwidth and stability; critical for transient response in CC regulation. |
| VIN / VCC | Power input / internal LDO output | VIN powers switch; VCC supplies internal circuitry (5.15 V ±3%, 47 mA max) and requires 1 µF decoupling. |
| PGND / AGND | Power / analog ground | Separate ground pins minimize noise coupling between power stage and precision current sensing. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond LED current transitions using adaptive off-time control - eliminates inductor saturation during rapid dimming. |
| Four Configurable Dimming Modes | Hardware-selectable via EN/PWM and ADIM/HD pin states - no firmware or external controller required for analog, PWM, hybrid, or flexible dimming. |
| Extended Temperature Operation | –55°C to +125°C junction range - validated for cold-storage lighting, outdoor signage, and under-hood automotive auxiliary lighting. |
| Integrated Protection Suite | LED open/short, FET open/short, cycle-by-cycle current limit, thermal shutdown, and configurable thermal foldback - reduces BOM count and system-level validation effort. |
| Common-Cathode LED Support | Eliminates need for high-side current sensing or floating gate drivers - simplifies layout and enables single-layer PCB implementation. |
Applications
| Medical Surgical Lighting | Machine Vision Flash |
|---|---|
Use Scenario: High-intensity, flicker-free illumination for endoscopic and surgical procedures requiring stable color rendering and zero temporal artifacts. IC Role / Device Role / Timing Role: Constant-current LED driver with 2,000:1 hybrid dimming at 20 kHz - maintains brightness linearity while eliminating visible PWM artifacts. Use Value: Enables real-time brightness adjustment without perceptible delay or color shift, meeting IEC 62471 photobiological safety requirements. |
Use Scenario: Synchronized, ultra-short-duration flash for high-speed industrial camera inspection of moving parts. IC Role / Device Role / Timing Role: Inductive fast dimming (IFD) controller delivering 150 ns minimum PWM pulses - triggers precise LED turn-on within camera exposure window. Use Value: Eliminates motion blur by matching LED on-time to sub-millisecond exposure periods, improving defect detection accuracy. |
| LCD Backlighting | Battery Charging (CC/CV) |
Use Scenario: Adaptive brightness control in commercial displays and portable projectors using multi-string white LEDs. IC Role / Device Role / Timing Role: Dual-mode CC/CV regulator - operates as constant-current source for LED strings and constant-voltage source for display bias rails. Use Value: Reduces component count by consolidating backlight and auxiliary power functions into single IC, lowering system cost and footprint. |
Use Scenario: High-efficiency charging of Li-ion or lead-acid batteries in portable medical devices and emergency lighting systems. IC Role / Device Role / Timing Role: Programmable CC/CV charger with thermal foldback - regulates charge current up to 4 A and terminates at user-defined voltage thresholds. Use Value: Ensures safe, temperature-aware charging without external supervision, extending battery life and complying with UL 1310 Class 2 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS923654DMTR | Same VSON-14 package and 6.5A current limit, but rated for –40°C to +125°C only; no extended temp qualification. | Suitable for commercial indoor lighting where ambient temperature stays above –40°C. | Select TPS923654DMTR only if extended –55°C operation is not required and cost sensitivity outweighs thermal margin. |
| TPS923655HMDMTR | Identical package, temperature rating, and 8.5A current limit, but includes spread spectrum EMI reduction (±7%, 2 kHz modulation). | Better suited for EMI-sensitive environments like medical imaging equipment or consumer laser TVs. | Choose TPS923655HMDMTR when conducted/radiated emissions compliance is critical and brightness stability at low dimming levels is secondary. |
Compared with TPS923654DMTR, the TPS923654HMDMTR adds –55°C operation for harsh environments; compared with TPS923655HMDMTR, it omits spread spectrum to prioritize dimming fidelity in low-brightness strobe applications - making it optimal for precision timing-critical illumination.
Availability
TPS923654HMDMTR is available at Aetrix Electronics and suitable for medical lighting, machine vision flash, and industrial battery charging applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS923654HMDMTR 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, embedded processing, and power management technologies, with leadership in high-reliability LED driver innovation.
The TPS92365x product line was designed for high-power, high-dimming-ratio LED systems requiring both constant-current and constant-voltage operation - targeting surgical lighting, industrial automation, and professional display markets.
FAQ
What is the maximum operating junction temperature for the TPS923654HMDMTR?
The TPS923654HMDMTR is rated for operation from –55°C to +125°C junction temperature, confirmed in Section 6.1 Absolute Maximum Ratings and Table 4 Device Comparison. This extended range distinguishes it from standard-grade variants like TPS923654DMTR (–40°C to +125°C) and supports deployment in cold-storage lighting and outdoor signage applications where ambient extremes occur.
How does the TPS923654HMDMTR achieve 150 ns minimum PWM pulse width?
The TPS923654HMDMTR achieves 150 ns minimum PWM pulse width through hardware-based inductive fast dimming (IFD) architecture, which combines adaptive off-time current-mode control with precise internal sampling of the EN/PWM signal edge. This eliminates software latency and enables direct, cycle-accurate switching of the integrated 150 mΩ FET - verified in Section 7.3.5.1 and Figure 6-4 of the datasheet.
Can the TPS923654HMDMTR be used for battery charging applications?
Yes, the TPS923654HMDMTR supports CC/CV charging mode per its official description and functional block diagram. It regulates constant current up to 4 A (limited by external components) and switches to constant-voltage mode upon reaching the programmed OVP threshold - making it suitable for Li-ion, lead-acid, and supercapacitor charging in portable medical and emergency lighting systems.
What is the purpose of the ADIM/HD pin on the TPS923654HMDMTR?
The ADIM/HD pin on the TPS923654HMDMTR selects dimming architecture: pulled high enables PWM-only dimming; pulled low enables hybrid dimming; driven with a PWM signal enables analog or flexible dimming depending on EN/PWM state. Its function is defined in Table 7-2 Dimming Mode Configuration and verified across Sections 7.3.5 and 7.3.5.2–7.3.5.4 of the datasheet.
Does the TPS923654HMDMTR include spread spectrum frequency modulation?
No, the TPS923654HMDMTR disables spread spectrum - confirmed in Table 4 Device Comparison, which explicitly lists "Disabled" for Spread Spectrum under the TPS923654HMDMTR row. This design choice prioritizes brightness stability and dimming fidelity in low-light strobe and surgical lighting applications over EMI reduction.
TPS923654HMDMTR 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:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount, Wettable Flank
- Supplier Device Package:
- 14-VSON (4.5x3)
TPS923654HMDMTR FAQ
1.How can I place an order for TPS923654HMDMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS923654HMDMTR 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 TPS923654HMDMTR reliable?
The price and inventory of TPS923654HMDMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS923654HMDMTR is usually 5 days.
3.What payment methods are accepted for TPS923654HMDMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS923654HMDMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS923654HMDMTR?
TPS923654HMDMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS923654HMDMTR 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 TPS923654HMDMTR?
For technical support, including TPS923654HMDMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS923654HMDMTR requirements.
6.How does Aetrix verify that TPS923654HMDMTR is sourced from the original manufacturer or authorized distributors?
All TPS923654HMDMTR 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 TPS923654HMDMTR meets industry standards.
7.What is the process for return or replacement of TPS923654HMDMTR?
All TPS923654HMDMTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS923654HMDMTR, 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 TPS923654HMDMTR part is unused and in its original packaging.
Return procedure for TPS923654HMDMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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