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Texas Instruments TPS923653DRRR
- Part No.:
- TPS923653DRRR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 12-WFDFN Exposed Pad
- Datasheet:
-
TPS923653DRRR.pdf
- Description:
- 65-V, 2-A BOOST OR BUCK-BOOST LE
- Quantity:
- Payment:
- Shipping:
Inventory:2,610
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Product details
Overview
TPS923653DRRR from Texas Instruments is a 4.5V–65V input, non-synchronous boost/buck-boost LED driver with integrated 150mΩ low-side NMOS FET, 3A cycle-by-cycle current limit, and spread spectrum EMI reduction. It supports inductive fast dimming (IFD), common-cathode LED topology, and CC/CV operation for lighting and battery charging applications.
For engineers reviewing the TPS923653DRRR datasheet, TPS923653DRRR pinout, TPS923653DRRR application, or TPS923653DRRR equivalent, this device delivers ultra-fast 150ns PWM dimming pulses, hybrid dimming up to 1,000,000:1 at 120Hz, configurable 100kHz–2.2MHz switching, thermal foldback control, and full system protection including LED open/short and thermal shutdown.
Technical Context
The TPS923653DRRR implements adaptive off-time current mode control with smart sampling to enable inductive fast dimming (IFD) and maintain high dimming accuracy across analog, PWM, hybrid, and flexible modes. Its error amplifier output (COMP) interfaces with an external RC network to set loop bandwidth, while the FSET pin configures switching frequency from 100kHz to 2.2MHz via resistor selection.
Spread spectrum modulation (±7%, 2kHz) is enabled on the TPS923653DRRR to reduce EMI peaks without compromising regulation stability. The device uses dual ground pins (PGND and AGND), separate CSP/CSN current sense inputs, and a dedicated FAULT open-drain output that asserts immediately upon detection of LED open, switch fault, or thermal events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 63V - supports wide-range industrial, automotive, and mains-derived supplies without pre-regulation. |
| Output Current Capability | Up to 2A continuous - determined by external RSENSE and thermal design; 3A cycle-by-cycle current limit protects against transient overloads. |
| Switching Frequency | 100kHz to 2.2MHz - adjustable via FSET pin resistor; higher frequencies enable smaller magnetics but increase switching loss. |
| Dimming Resolution | 150ns minimum PWM pulse width - enables precise timing control for strobe, machine vision, and camera flash applications. |
| Thermal Protection | Configurable thermal foldback + 165°C shutdown - RTEMP sets foldback curve; prevents thermal runaway under sustained overload. |
| Current Sense Threshold | 200mV nominal - sets full-scale LED current via RSENSE = 0.2V / ILED; tolerance ±3% ensures accurate constant-current regulation. |
| EMI Reduction | Enabled spread spectrum (±7%, 2kHz) - reduces peak radiated emissions at fundamental and harmonics, easing EMC compliance. |
Pinout & Package
TPS923653DRRR is housed in a thermally enhanced 12-pin WSON package (3.0mm × 3.0mm, 0.5mm pitch) with exposed thermal pad connected to PGND/AGND. This compact, single-layer PCB-compatible footprint supports high-power density designs with efficient heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW | Switching node | Connects internally to low-side NMOS drain; ties to inductor and Schottky diode anode in boost/buck-boost topologies. |
| CSP / CSN | Current sense differential inputs | Measure voltage drop across external RSENSE; 200mV threshold enables precise LED current regulation. |
| VIN | Main power input | Accepts 4.5V–63V; powers internal LDO and switching stage; UVLO triggers at ~3.0V falling edge. |
| VCC | Internal LDO output | 5.15V regulated supply for internal circuitry; requires 1μF capacitor to AGND; soft-start time depends on capacitance. |
| EN/PWM | Enable or PWM dimming input | Pull high for always-on; apply PWM signal for direct dimming; minimum 5μs pulse required to initiate startup sequence. |
| ADIM/HD | Analog/hybrid dimming control | Pull low for hybrid dimming; apply PWM for analog dimming; determines dimming mode configuration at power-up. |
| FAULT | Open-drain fault indicator | Asserts low on LED open/short, switch fault, thermal event, or OVP; requires external pull-up for system-level monitoring. |
| TEMP | Thermal foldback programming | Resistor-to-AGND sets foldback curve slope; direct AGND connection disables foldback. |
| FSET | Frequency setting input | Resistor-to-AGND selects switching frequency (e.g., 59kΩ = 400kHz); avoids floating to prevent instability. |
| COMP | Error amplifier output | Drives external compensation network (RC); sets loop bandwidth and stability margin for current regulation. |
| OVP | Overvoltage protection input | Resistive divider sets LED string open-circuit detection threshold; prevents overvoltage damage to LEDs. |
| PGND / AGND | Power and analog ground | Separate ground paths minimize noise coupling; thermal pad connects to both; critical for EMI and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| Inductive Fast Dimming (IFD) | Enables sub-microsecond current transitions using adaptive off-time control and smart sampling-critical for strobe and machine vision. |
| Hybrid Dimming (2,000:1–1,000,000:1) | Combines analog dimming (12.5–100% brightness) with PWM dimming (0–12.5%) to achieve ultra-high contrast ratios at low frequencies. |
| Spread Spectrum Modulation | ±7% frequency dither at 2kHz reduces EMI peak amplitude-eliminates need for large input filters in space-constrained designs. |
| Full System Protection Suite | Includes LED open/short, switch FET open/short, RSENSE fault, cycle-by-cycle current limit, thermal foldback, and shutdown with FAULT pin assertion. |
| Common-Cathode LED Support | Allows direct drive of multi-string LED arrays with shared cathode-reduces wiring complexity and improves thermal uniformity. |
| CC/CV Dual-Mode Operation | Regulates constant current for LED driving and constant voltage for battery charging or TEC control-enables multi-function power stage reuse. |
Applications
| Machine Vision Illumination | Medical Surgical Lighting |
|---|---|
Use Scenario: High-speed synchronized illumination for industrial inspection cameras requiring microsecond-level on/off control. IC Role / Device Role / Timing Role: LED driver with 150ns PWM capability and IFD enabling precise strobe timing and minimal latency. Use Value: Eliminates motion blur in high-frame-rate imaging; supports >100kHz flash repetition without thermal saturation. |
Use Scenario: Adjustable-intensity surgical headlamps demanding flicker-free, color-stable illumination across wide dimming ranges. IC Role / Device Role / Timing Role: Constant-current LED controller with hybrid dimming and thermal foldback for safe, stable output. Use Value: Delivers 1,000,000:1 dimming ratio at 120Hz-meets stringent medical requirements for low-frequency flicker avoidance. |
| Fire Alarm Strobe | LCD Backlighting |
Use Scenario: High-intensity emergency strobes requiring rapid, reliable pulsing with long operational life and fail-safe monitoring. IC Role / Device Role / Timing Role: Robust LED driver with integrated FAULT pin, OVP, and thermal shutdown for safety-critical signaling. Use Value: FAULT pin provides immediate system-level fault reporting; spread spectrum reduces EMI interference with alarm sensors. |
Use Scenario: Thin-profile display backlighting needing high efficiency, low EMI, and seamless dimming from full brightness to near-black. IC Role / Device Role / Timing Role: CC/CV-capable driver operating in constant-current mode for LEDs and supporting analog/hybrid dimming. Use Value: Achieves 2000:1 dimming at 20kHz-enables flicker-free, high-resolution brightness control without audible noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS923653DMTR | VSON-14 package (4.5mm × 3.0mm); identical electrical specs and spread spectrum enablement. | Better thermal performance (RθJA = 39.1°C/W vs. 47.4°C/W) and higher power handling in space-constrained layouts. | Select when board layout allows larger footprint and thermal management prioritizes junction-to-ambient conduction. |
| TPS923655DRRR | Same WSON-12 package; 6.5A current limit (vs. 3A); identical spread spectrum and dimming features. | Supports higher-output LED strings or parallel configurations where >2A average current is required. | Choose when scaling output power without changing PCB footprint or control interface is essential. |
Compared with TPS923653DRRR, the TPS923653DMTR offers superior thermal resistance in a larger package, while the TPS923655DRRR doubles current capability in the same WSON-12 footprint-enabling either thermal optimization or power scaling without redesigning control logic or dimming interface.
Availability
TPS923653DRRR is available at Aetrix Electronics and suitable for machine vision illumination, medical surgical lighting, fire alarm strobes, and LCD backlighting requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TPS923653DRRR 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 delivering analog, embedded processing, and power management solutions with emphasis on reliability, precision, and energy efficiency.
The TPS92365x product line was designed specifically for high-performance LED lighting and multi-mode power conversion-targeting applications demanding ultra-fast dimming, wide input range, and robust protection in compact form factors.
FAQ
What dimming modes does the TPS923653DRRR support?
The TPS923653DRRR supports four distinct dimming modes: analog dimming (256:1), fast PWM dimming (150ns minimum pulse width), hybrid dimming (2,000:1 at 20kHz, up to 1,000,000:1 at 120Hz), and flexible dimming. Mode selection is determined by logic states applied to the EN/PWM and ADIM/HD pins during startup, with no external configuration registers required.
Does the TPS923653DRRR include spread spectrum modulation?
Yes, the TPS923653DRRR has spread spectrum modulation enabled by default-±7% frequency dither at 2kHz-specifically to reduce EMI peak amplitudes and simplify EMC compliance. This feature distinguishes it from the TPS923652 variants, which disable spread spectrum for optimal brightness stability at low light levels.
What is the maximum continuous LED current supported by the TPS923653DRRR?
The TPS923653DRRR supports up to 2A continuous LED current, limited by thermal design and external components. Its 3A cycle-by-cycle current limit provides transient overload protection, while the 150mΩ integrated MOSFET and WSON-12 thermal pad enable efficient power delivery within its 125°C maximum junction temperature rating.
How is thermal protection implemented in the TPS923653DRRR?
The TPS923653DRRR implements dual-stage thermal protection: configurable thermal foldback (via TEMP pin resistor) gradually reduces output current above a user-defined threshold, and hard thermal shutdown activates at 165°C with 15°C hysteresis. Both functions are monitored continuously and reported via the open-drain FAULT pin.
Can the TPS923653DRRR be used for battery charging applications?
Yes, the TPS923653DRRR supports constant-voltage (CV) mode in addition to constant-current (CC) operation, making it suitable for Li-ion, lead-acid, or supercapacitor charging. Its wide 4.5V–63V input range, programmable OVP, and full protection suite-including sense resistor fault detection-enable robust, integrated charging solutions.
TPS923653DRRR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 12-WFDFN 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
- Supplier Device Package:
- 12-WSON (3x3)
TPS923653DRRR FAQ
1.How can I place an order for TPS923653DRRR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS923653DRRR 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 TPS923653DRRR reliable?
The price and inventory of TPS923653DRRR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS923653DRRR is usually 5 days.
3.What payment methods are accepted for TPS923653DRRR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS923653DRRR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS923653DRRR?
TPS923653DRRR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS923653DRRR 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 TPS923653DRRR?
For technical support, including TPS923653DRRR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS923653DRRR requirements.
6.How does Aetrix verify that TPS923653DRRR is sourced from the original manufacturer or authorized distributors?
All TPS923653DRRR 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 TPS923653DRRR meets industry standards.
7.What is the process for return or replacement of TPS923653DRRR?
All TPS923653DRRR units undergo pre-shipment inspection (PSI). If there is an issue with TPS923653DRRR, 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 TPS923653DRRR part is unused and in its original packaging.
Return procedure for TPS923653DRRR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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