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Texas Instruments TPS923653DMTR
- Part No.:
- TPS923653DMTR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TPS923653DMTR.pdf
- Description:
- 65-V, 2-A BOOST OR BUCK-BOOST LE
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
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Product details
Overview
TPS923653DMTR from Texas Instruments is a 65V, 2A non-synchronous boost/buck-boost LED driver with integrated 150mΩ low-side NMOS FET, 4.5–65V input range, and spread spectrum EMI reduction. It supports inductive fast dimming (IFD), hybrid/flexible dimming up to 1,000,000:1 at 120Hz PWM, and operates across –40°C to +125°C junction temperature for high-reliability lighting and power conversion.
For engineers reviewing the TPS923653DMTR datasheet, TPS923653DMTR pinout, TPS923653DMTR application, or TPS923653DMTR equivalent, this device delivers precise CC/CV control for LED drivers, battery chargers, and TEC controllers - with critical attention to thermal foldback configuration, CSP/CSN current sense accuracy, and FSET resistor-based frequency tuning from 100kHz to 2.2MHz.
Technical Context
The TPS923653DMTR implements adaptive off-time current mode control with smart sampling to enable inductive fast dimming (IFD), achieving <150ns minimum PWM pulse width and high dimming linearity across hybrid modes. Its dual-input dimming logic (EN/PWM and ADIM/HD pins) configures four distinct dimming schemes without external microcontroller intervention.
It integrates constant-current regulation via CSP–CSN differential sensing (200mV reference), configurable overvoltage protection (OVP) using external resistive dividers, and fault reporting through an open-drain FAULT pin. Spread spectrum modulation (±7%, 2kHz) is factory-enabled on this variant to reduce conducted and radiated EMI at fundamental and harmonic frequencies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 65V - supports wide-range industrial, automotive, and AC/DC-derived supplies without pre-regulation. |
| Output Current Capability | 2A continuous - determined by 3A typical cycle-by-cycle current limit and thermal design margin. |
| Switching Frequency Range | 100kHz to 2.2MHz - set via FSET pin resistor; lower frequencies improve efficiency, higher frequencies reduce passive size. |
| Dimming Resolution | Up to 1,000,000:1 at 120Hz - achieved via flexible dimming combining analog and PWM control paths. |
| Current Sense Threshold | 200mV ±3mV - enables accurate LED current regulation with minimal power loss in RSENSE. |
| Thermal Protection | Configurable thermal foldback (via TEMP pin resistor) + 165°C shutdown - ensures safe operation under sustained overload. |
| EMI Reduction | Enabled spread spectrum (±7% center frequency, 2kHz modulation) - reduces peak spectral energy without sacrificing regulation. |
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 and analog ground | Separate ground paths minimize noise coupling; thermal pad connects to both for enhanced heat dissipation. |
| VIN | Main input supply | Accepts 4.5–65V; powers internal LDO and switching FET; UVLO triggers at ~3.0V rising threshold. |
| VCC | Internal LDO output | 5.15V regulated output; requires 1μF capacitor to AGND; soft-start time depends on capacitor value. |
| EN/PWM | Enable or PWM dimming input | Pull high for always-on; apply PWM signal for direct PWM dimming; minimum 150ns pulse width supported. |
| ADIM/HD | Analog/hybrid dimming control | Pull low for hybrid dimming; apply PWM signal for analog dimming; determines dimming mode at startup. |
| FAULT | Fault status output | Open-drain; pulls low on LED open/short, FET fault, thermal shutdown, or OVP - requires external pull-up. |
| TEMP | Thermal foldback configuration | Resistor-to-AGND sets foldback curve slope; direct AGND connection disables foldback. |
| FSET | Switching frequency programming | Resistor-to-AGND selects frequency from 100kHz (232kΩ) to 2.2MHz (9kΩ); no floating allowed. |
| COMP | Error amplifier output | Connect RC network to AGND to set loop bandwidth and stability; critical for transient response. |
| OVP | Overvoltage detection input | Resistive divider from VOUT sets LED open-circuit threshold; enables safe open-wire protection. |
| CSP / CSN | Current sense inputs | Differential pair measuring voltage across external RSENSE; 200mV reference enables precise CC regulation. |
| SW | Switching node | Connects to inductor and Schottky diode; carries high di/dt; requires tight layout and Kelvin routing. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond LED current transitions via adaptive off-time control and accurate current sampling - critical for machine vision strobes. |
| Hybrid Dimming Architecture | Combines analog dimming (12.5–100% brightness) with PWM dimming (0–12.5%) to achieve 1,000,000:1 ratio at 120Hz without flicker or color shift. |
| Integrated Low-Side FET | 150mΩ RDS(on) MOSFET eliminates external switch - reduces BOM count, layout area, and conduction losses in boost/buck-boost topologies. |
| Configurable Thermal Foldback | Adjustable foldback curve via TEMP pin resistor allows trade-off between power derating and thermal safety - avoids abrupt shutdown in thermally constrained enclosures. |
| Full System Protection Suite | Includes LED open/short, sense resistor failure, cycle-by-cycle current limit, thermal shutdown, and fault signaling - enables robust field operation without external supervision. |
Applications
| Machine Vision Strobes | Medical Surgical Lighting |
|---|---|
Use Scenario: High-speed synchronized illumination for industrial cameras capturing moving parts at >10k fps. IC Role / Device Role / Timing Role: LED driver with ultra-fast dimming response (<150ns pulse width) and precise current regulation during brief exposure windows. Use Value: Eliminates motion blur and ensures consistent photon flux per frame via inductive fast dimming (IFD) and hybrid dimming linearity. |
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 controller supporting hybrid dimming up to 1,000,000:1 at 120Hz to avoid perceptible flicker in clinical environments. Use Value: Maintains CCT stability and eliminates stroboscopic effect while enabling smooth, silent brightness adjustment without audible coil whine. |
| Industrial Projector Backlighting | Battery Charging Systems |
Use Scenario: High-brightness LCD backlight for outdoor-rated projectors operating from 12–48V DC sources. IC Role / Device Role / Timing Role: Boost/buck-boost CC/CV source delivering stable current to multi-string LED arrays with wide input voltage tolerance. Use Value: Single-chip solution replaces discrete buck-boost + linear regulator combinations - improves efficiency (>90% at 1A) and reduces thermal footprint. |
Use Scenario: 2A CC/CV charging for Li-ion or lead-acid batteries in portable medical devices or backup systems. IC Role / Device Role / Timing Role: Dual-mode controller regulating both LED current and battery voltage via shared CSP/CSN sensing and OVP feedback. Use Value: Enables shared power stage between illumination and charging functions - reduces component count and simplifies system-level thermal management. |
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 3A current limit, but with 6.5A typical FET current limit and enabled spread spectrum. | Higher output capability suits 4A-class LED strings; identical dimming features and pinout. | Select when higher peak current or improved EMI performance is required without changing layout. |
| TPS923652DMTR | Identical VSON-14 package and 3A current limit, but spread spectrum disabled for optimal brightness stability at low duty cycles. | Better suited for applications where EMI is managed externally and ultra-low-brightness PWM fidelity is prioritized. | Choose when minimizing brightness variation at sub-1% dimming levels outweighs EMI reduction needs. |
Compared with TPS923653DMTR, TPS923655DMTR offers higher current headroom for demanding LED loads, while TPS923652DMTR trades spread spectrum for enhanced PWM dimming consistency - all three share identical pinout, thermal design, and control interface.
Availability
TPS923653DMTR is available at Aetrix Electronics and suitable for machine vision strobes, medical surgical lighting, industrial projector backlighting, and battery charging systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS923653DMTR 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 and power conversion solutions.
The TPS92365x product line was designed specifically for high-performance, wide-input-voltage LED drivers requiring inductive fast dimming, hybrid dimming, and integrated CC/CV control - targeting professional lighting, imaging, and portable power applications.
FAQ
What dimming modes does the TPS923653DMTR support, and how are they selected?
The TPS923653DMTR supports four dimming modes: PWM, analog, hybrid, and flexible dimming. Selection occurs at startup based on logic states applied to EN/PWM and ADIM/HD pins - e.g., PWM signal on EN/PWM + high ADIM/HD enables PWM dimming, while PWM on EN/PWM + low ADIM/HD enables hybrid dimming. The TPS923653DMTR uses these pins exclusively for mode configuration without requiring I²C or other serial interfaces.
Does the TPS923653DMTR include spread spectrum EMI reduction, and how is it configured?
Yes, the TPS923653DMTR has spread spectrum enabled by default - unlike TPS923652DMTR - with ±7% frequency deviation and 2kHz modulation. It requires no external components or configuration; the feature is factory-programmed and active whenever the device operates within its specified frequency range. This reduces peak EMI emissions without affecting regulation accuracy or dimming performance.
What is the purpose of the TEMP pin on the TPS923653DMTR, and how is it used?
The TEMP pin on the TPS923653DMTR configures the thermal foldback behavior: connecting a resistor to AGND sets the foldback curve's slope and onset temperature, allowing designers to tailor power derating versus thermal shutdown thresholds. Leaving the pin unconnected disables foldback entirely, while shorting to AGND activates default foldback. This provides flexibility for enclosure-limited thermal environments without requiring external monitoring circuitry.
How does the TPS923653DMTR achieve inductive fast dimming (IFD), and what benefit does it provide?
The TPS923653DMTR achieves inductive fast dimming (IFD) through adaptive off-time current mode control combined with high-speed current sampling and smart timing logic - enabling LED current transitions in under 150ns. This eliminates slow current ramp artifacts in strobe and machine vision applications, ensuring precise photon delivery per exposure window and eliminating motion blur in high-speed imaging.
Can the TPS923653DMTR be used for battery charging, and what protections apply?
Yes, the TPS923653DMTR supports CC/CV charging mode and can regulate both constant current and constant voltage outputs using the same CSP/CSN sense path and OVP feedback. It includes full protection for battery charging: cycle-by-cycle current limiting, thermal shutdown, overvoltage detection, and fault signaling via the open-drain FAULT pin - making it suitable for Li-ion, lead-acid, and supercapacitor charging applications.
TPS923653DMTR 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):
- 63V
- Voltage - Output:
- 0V ~ 63V
- Current - Output / Channel:
- 2A
- 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)
TPS923653DMTR FAQ
1.How can I place an order for TPS923653DMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS923653DMTR 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 TPS923653DMTR reliable?
The price and inventory of TPS923653DMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS923653DMTR is usually 5 days.
3.What payment methods are accepted for TPS923653DMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS923653DMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS923653DMTR?
TPS923653DMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS923653DMTR 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 TPS923653DMTR?
For technical support, including TPS923653DMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS923653DMTR requirements.
6.How does Aetrix verify that TPS923653DMTR is sourced from the original manufacturer or authorized distributors?
All TPS923653DMTR 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 TPS923653DMTR meets industry standards.
7.What is the process for return or replacement of TPS923653DMTR?
All TPS923653DMTR units undergo pre-shipment inspection (PSI). If there is an issue with TPS923653DMTR, 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 TPS923653DMTR part is unused and in its original packaging.
Return procedure for TPS923653DMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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