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Texas Instruments TPS923652DYYR
- Part No.:
- TPS923652DYYR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- SOT-23-14 Thin, SOT-23 Variant
- Datasheet:
-
TPS923652DYYR.pdf
- Description:
- 65-V, 2-A BOOST OR BUCK-BOOST LE
- Quantity:
- Payment:
- Shipping:
Inventory:2,833
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Product details
Overview
TPS923652DYYR from Texas Instruments is a 2A non-synchronous boost/buck-boost LED driver with 4.5V–65V input range, integrated 150mΩ low-side NMOS switch, and inductive fast dimming (IFD) support. It delivers constant-current LED drive or constant-voltage output for battery charging/TEC control, operating up to 2.2MHz switching frequency with configurable thermal foldback and full fault protection. Used in medical lighting, machine vision flash, and LCD backlighting.
For engineers reviewing the TPS923652DYYR datasheet, TPS923652DYYR pinout, TPS923652DYYR application, or TPS923652DYYR equivalent, key selection criteria include its 3A cycle-by-cycle current limit, SOT-23-THN (14-pin) package, 150ns minimum PWM pulse width, common-cathode LED topology support, and absence of spread spectrum-critical for low-noise brightness stability in precision illumination systems.
Technical Context
The TPS923652DYYR 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 output (COMP) interfaces with an external RC network to set loop bandwidth, while FSET pin resistance selects switching frequency from 100kHz to 2.2MHz.
It supports dual-mode operation: constant-current (CC) for LED drive and constant-voltage (CV) for battery charging or TEC control. Protection includes LED open/short detection via OVP and CSP/CSN sensing, cycle-by-cycle current limiting, thermal shutdown at 165°C, and configurable thermal foldback via TEMP pin resistor.
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 | 2A - sustained LED drive capability with integrated 150mΩ MOSFET and 3A cycle-by-cycle current limit. |
| Switching Frequency | 100kHz to 2.2MHz - adjustable via FSET pin resistor; higher frequencies reduce inductor size, lower frequencies improve efficiency. |
| PWM Minimum Pulse Width | 150ns - enables ultra-fast dimming transitions for strobe and machine vision applications. |
| Dimming Ratio (Hybrid) | 2,000:1 at 20kHz - achieves high dynamic range without visible flicker in critical illumination systems. |
| Thermal Shutdown | 165°C with 15°C hysteresis - protects against sustained overload or poor heatsinking in enclosed fixtures. |
| Current Sense Threshold | 200mV ±3mV - precise CC regulation with minimal drift over temperature and line conditions. |
Pinout & Package
SOT-23-THN (14-pin) package, 4.2mm × 3.3mm body size, with exposed thermal pad connected to PGND/AGND. Designed for single-layer PCB layout and common-cathode LED configurations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PGND / AGND | Power & Analog Ground | Separate ground pins minimize noise coupling between power switching and feedback paths; thermal pad enhances thermal dissipation. |
| VIN | Main Input Supply | Accepts 4.5V–63V DC input; powers internal LDO and switching FET; UVLO triggers at ~3.0V rising threshold. |
| VCC | Internal LDO Output | 5.15V ±0.15V regulated supply for internal circuitry; requires 1μF capacitor to AGND for soft-start timing. |
| EN/PWM | Enable / PWM Input | Active-high enable; accepts 150ns minimum PWM pulses for direct dimming control; logic thresholds: 0.4V low / 1.2V high. |
| ADIM/HD | Analog Dimming / Hybrid Select | Configures dimming mode: high = PWM only, low = hybrid, PWM signal = analog/flexible; 6-bit or 8-bit resolution supported. |
| FAULT | Open-Drain Fault Indicator | Pulls low on LED open/short, FET failure, thermal fault, or sense resistor fault; requires external pull-up for system monitoring. |
| TEMP | Thermal Foldback Control | Resistor-to-AGND sets foldback curve start point (e.g., 130°C with 20kΩ); direct AGND connection disables foldback. |
| FSET | Frequency Set Input | Resistor-to-AGND selects switching frequency (e.g., 59kΩ = 400kHz); floating pin not allowed. |
| COMP | Error Amplifier Output | Connects to external compensation network (RC) to stabilize current loop; bandwidth adjusted per application stability needs. |
| OVP | Overvoltage Protection | Resistor divider sets LED open-circuit detection threshold; prevents overvoltage damage during LED string failure. |
| CSP / CSN | Current Sense Inputs | Differential inputs for external sense resistor; 200mV reference enables accurate CC regulation independent of VIN or VOUT. |
| SW | Switching Node | Connects to inductor and Schottky diode; carries high dv/dt switching waveform; requires tight layout and ground plane. |
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 strobes. |
| Four Dimming Modes | Hardware-configurable via ADIM/HD and EN/PWM pins: PWM (150ns), analog (8-bit), hybrid (2,000:1 @20kHz), flexible (independent ADIM/PWM control). |
| CC/CV Dual-Mode Operation | Supports both constant-current LED drive and constant-voltage battery charging/TEC control from same IC-reduces BOM count in multi-function systems. |
| Full System Protection | Integrated LED open/short, FET open/short, sense resistor fault, thermal shutdown, and cycle-by-cycle current limiting-eliminates need for external fault monitoring. |
| Single-Layer PCB Compatibility | Common-cathode topology and pinout optimized for cost-sensitive designs requiring simplified routing and reduced layer count. |
Applications
| Medical Surgical Lighting | Machine Vision Flash |
|---|---|
Use Scenario: High-intensity, flicker-free illumination for endoscopic and surgical procedures requiring stable color rendering and instant on/off control. IC Role / Device Role / Timing Role: Constant-current LED driver with hybrid dimming mode enabling 2,000:1 dimming ratio at 20kHz-ensuring zero perceptible flicker under high-speed camera capture. Use Value: Eliminates thermal lag and current overshoot during rapid intensity changes, maintaining consistent lumen output and CCT across dimming range. |
Use Scenario: Ultra-short, precisely timed LED bursts synchronized to camera exposure windows in automated inspection systems. IC Role / Device Role / Timing Role: Inductive fast dimming (IFD) controller delivering 150ns minimum PWM pulse width with nanosecond-level current rise/fall times. Use Value: Enables <1µs LED turn-on latency and sub-µs current settling-critical for capturing sharp, motion-blur-free images at >10k fps. |
| LCD Backlighting | Battery Charging |
Use Scenario: Dynamic contrast control in commercial displays using local dimming zones driven by high-efficiency white LED strings. IC Role / Device Role / Timing Role: Constant-current source supporting analog dimming with 8-bit resolution and <15ms VREF response time for smooth brightness transitions. Use Value: Achieves 0.4% duty cycle step resolution and <5ms initial VREF adjustment-enabling imperceptible grayscale ramping without banding artifacts. |
Use Scenario: Single-chip CC/CV charging solution for Li-ion or LiFePO₄ batteries in portable medical or industrial equipment. IC Role / Device Role / Timing Role: Dual-mode regulator operating in CV mode with OVP threshold set via external resistor divider; CC mode uses CSP/CSN sensing. Use Value: Replaces discrete charger IC + LED driver with one device, reducing footprint and eliminating redundant current-sense circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS923653DYYR | Same SOT-23-THN package and 3A current limit, but includes enabled spread spectrum (±7%, 2kHz modulation) for EMI reduction. | Better suited for EMI-sensitive environments (e.g., automotive infotainment backlighting); trades minor brightness ripple for lower conducted emissions. | Select TPS923653DYYR when EMI compliance is prioritized over absolute brightness stability at low dimming levels. |
| TPS923654DRRR | WSON-12 package, 6.5A current limit, same 4.5V–65V input, no spread spectrum-higher power density than TPS923652DYYR. | Targets higher-current LED arrays (e.g., outdoor signage, stage lighting); requires different PCB layout and thermal management. | Choose TPS923654DRRR when >2A output current is required and WSON-12 thermal performance (RθJA = 47.4°C/W) meets system constraints. |
Compared with TPS923653DYYR, the TPS923652DYYR offers superior low-brightness stability due to disabled spread spectrum; compared with TPS923654DRRR, it provides lower-cost, lower-current operation in a thermally robust SOT-23-THN package ideal for space-constrained medical and vision systems.
Availability
TPS923652DYYR is available at Aetrix Electronics and suitable for medical lighting, machine vision flash, and LCD backlighting requiring stable component supply, long-term lifecycle support, and traceable sourcing for Class II medical and industrial safety-critical designs.
Supply support for TPS923652DYYR 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 high-reliability LED drivers and power conversion ICs.
The TPS92365x product line was designed specifically for high-dynamic-range, high-efficiency LED illumination and dual-mode (CC/CV) power delivery in medical, industrial, and imaging applications-emphasizing precision dimming, robust protection, and layout simplicity.
FAQ
What dimming modes does the TPS923652DYYR support, and how are they selected?
The TPS923652DYYR supports four hardware-configurable dimming modes: PWM, analog, hybrid, and flexible. Selection is determined at startup by logic states on the ADIM/HD and EN/PWM pins. For example, pulling ADIM/HD low and applying a PWM signal to EN/PWM enables hybrid dimming. The TPS923652DYYR achieves 2,000:1 dimming ratio at 20kHz in hybrid mode, with 150ns minimum pulse width in PWM mode-enabling precise control for machine vision and surgical lighting.
Does the TPS923652DYYR include spread spectrum frequency modulation?
No, the TPS923652DYYR has spread spectrum disabled-unlike the TPS923653DYYR and TPS923655 variants. This design choice prioritizes brightness stability and minimal low-frequency ripple at low dimming levels, making the TPS923652DYYR optimal for applications where visual flicker must be eliminated, such as medical endoscopy and high-speed imaging.
What is the maximum continuous output current capability of the TPS923652DYYR?
The TPS923652DYYR delivers up to 2A continuous LED current using its integrated 150mΩ low-side NMOS switch. Its cycle-by-cycle current limit is specified at 3A typical, providing headroom for transient loads. Thermal performance depends on PCB layout: in SOT-23-THN package with proper copper area, it sustains 2A at ambient temperatures up to 85°C with derating above that-verified in TI's SLVSGH1B datasheet Figure 6-1.
How does the TPS923652DYYR implement thermal protection?
The TPS923652DYYR features dual thermal protection: configurable thermal foldback (via resistor on TEMP pin, starting at 130°C typical) and hard thermal shutdown at 165°C with 15°C hysteresis. Foldback reduces output current gradually before shutdown, allowing graceful degradation in overheated enclosures. Both protections are fully integrated-no external sensors or logic required-and are documented in Section 6.5 and 7.3.4 of the TPS923652DYYR datasheet.
Can the TPS923652DYYR be used for battery charging applications?
Yes, the TPS923652DYYR supports constant-voltage (CV) mode for battery charging, in addition to constant-current (CC) LED driving. In CV mode, the OVP pin sets the output voltage threshold via an external resistor divider, while CSP/CSN sense resistor enables CC mode. This dual-mode capability allows single-IC solutions for devices requiring both LED illumination and onboard battery management-such as portable medical scanners or handheld inspection tools-without redesigning the power stage.
TPS923652DYYR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-14 Thin, SOT-23 Variant
- 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:
- 14-SOT-23-THIN
TPS923652DYYR FAQ
1.How can I place an order for TPS923652DYYR through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS923652DYYR 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 TPS923652DYYR reliable?
The price and inventory of TPS923652DYYR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS923652DYYR is usually 5 days.
3.What payment methods are accepted for TPS923652DYYR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS923652DYYR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS923652DYYR?
TPS923652DYYR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS923652DYYR 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 TPS923652DYYR?
For technical support, including TPS923652DYYR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS923652DYYR requirements.
6.How does Aetrix verify that TPS923652DYYR is sourced from the original manufacturer or authorized distributors?
All TPS923652DYYR 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 TPS923652DYYR meets industry standards.
7.What is the process for return or replacement of TPS923652DYYR?
All TPS923652DYYR units undergo pre-shipment inspection (PSI). If there is an issue with TPS923652DYYR, 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 TPS923652DYYR part is unused and in its original packaging.
Return procedure for TPS923652DYYR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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