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Texas Instruments TLC5925IDBQR
- Part No.:
- TLC5925IDBQR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC5925IDBQR.pdf
- Description:
- IC LED DRIVER LINEAR 45MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:6,505
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Product details
Overview
TLC5925IDBQR from Texas Instruments is a 16-channel constant-current LED sink driver IC designed for LED display and lighting systems. It features 16 regulated current outputs (3–45 mA), 30-MHz serial clock support, Schmitt-trigger inputs, thermal shutdown protection, and operates from 3 V to 5.5 V supply. It drives LEDs in signage, gaming machines, and white goods where uniform brightness across varying VF is critical.
For engineers reviewing the TLC5925IDBQR datasheet, TLC5925IDBQR pinout, TLC5925IDBQR application, or TLC5925IDBQR equivalent, key selection criteria include output current accuracy (±4% channel-to-channel), Rext-based current tuning, 17-V output voltage capability, fast 100-ns OE response, and SSOP-24 package compatibility with high-density LED panel layouts.
Technical Context
The TLC5925IDBQR integrates a 16-bit serial-in/parallel-out shift register with independent output latches and 16 matched current-sink channels. Each channel delivers stable current regardless of forward voltage variation, enabled by internal current regulation referenced to an external Rext resistor.
It supports daisy-chained operation via SDO/SDI interface, uses rising-edge CLK for data shifting, LE for parallel latch control, and active-low OE for global blanking. Built-in thermal shutdown (150–200°C trip) and 1-kV HBM ESD protection ensure robustness in industrial LED systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sink outputs for driving LEDs in parallel |
| Output Current Range | 3 mA to 45 mA, set precisely via external Rext resistor |
| Current Accuracy | ±4% max channel-to-channel mismatch ensures uniform LED brightness |
| Max Output Voltage | 17 V enables driving multi-LED strings with wide VF spread |
| Clock Frequency | 30 MHz supports high-speed serial data loading for large LED arrays |
| Supply Voltage | 3 V to 5.5 V compatible with both 3.3-V and 5-V logic/system rails |
| Response Time (OE) | 100 ns min enables precise PWM dimming synchronization |
Pinout & Package
Package: SSOP-24 (DBQ), 8.65 mm × 3.90 mm body size, RoHS-compliant, NIPDAU lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for logic and all 16 current-sink outputs |
| SDI (Pin 2) | Serial data input | Accepts 16-bit serial stream synchronized to CLK rising edge |
| CLK (Pin 3) | Clock input | Rising-edge triggered; shifts data into internal 16-bit shift register |
| LE (Pin 4) | Latch enable | Transfers shift register contents to output latches on falling edge |
| OUT0–OUT15 (Pins 5–12, 13–20) | Constant-current sinks | 16 individually controlled outputs; each sinks up to 45 mA |
| VDD (Pin 24) | Power supply | 3 V–5.5 V logic and bias supply; powers internal regulator and logic |
| R-EXT (Pin 23) | Current reference input | Connects external resistor to set all 16 output currents simultaneously |
| SDO (Pin 22) | Serial data output | Provides cascaded data output for daisy-chaining multiple TLC5925ICs |
| OE (Pin 21) | Output enable | Active-low global blanking; disables all outputs within 100 ns |
Key Features
| Feature | Design Value |
|---|---|
| Channel-to-channel current matching | ±4% max ensures consistent LED luminance without per-channel trimming |
| Inter-device current consistency | ±6% max enables predictable brightness across multiple ICs in large displays |
| Output voltage headroom | 17 V allows driving 5–6 white LEDs in series at typical VF (3.0–3.4 V) |
| Thermal protection | Auto-shutdown at 150–200°C prevents damage during overcurrent or poor heatsinking |
| Input noise immunity | Schmitt-trigger inputs reject slow-rising or noisy clock/data signals in industrial environments |
Applications
| Gaming Machine Displays | LED Signage Panels |
|---|---|
Use Scenario: High-reliability, high-brightness alphanumeric and graphic displays in casino floor cabinets. IC Role / Device Role / Timing Role: Constant-current sink driver controlling individual LED segments and pixels in multiplexed matrix layouts. Use Value: ±4% channel matching eliminates visible brightness gradients across large display areas under variable ambient temperature. |
Use Scenario: Outdoor full-color LED video walls requiring long-term luminance stability and thermal resilience. IC Role / Device Role / Timing Role: Primary current sink for red/green/blue subpixels in modular cabinet-based sign systems. Use Value: 17-V output capability supports longer LED strings per channel, reducing wiring complexity and driver count per square meter. |
| White Goods Indicator Lighting | Industrial Control Panel Backlighting |
Use Scenario: Appliance status indicators (washers, dryers, ovens) exposed to temperature cycling and vibration. IC Role / Device Role / Timing Role: Low-power LED driver managing discrete status lights with programmable intensity. Use Value: Rext-based current tuning allows single-BOM flexibility across models with different LED types (e.g., 20-mA vs. 35-mA emitters). |
Use Scenario: Operator interface backlighting in factory HMIs where EMI immunity and long service life are mandatory. IC Role / Device Role / Timing Role: Serially controlled sink driver enabling dynamic brightness adjustment via microcontroller SPI. Use Value: 30-MHz clock and 100-ns OE response support flicker-free PWM dimming synchronized to system timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940IPWP | 16-channel, but adds dot-correction and grayscale PWM (12-bit), higher supply current, TSSOP-28 package | Better suited for high-fidelity grayscale LED video; requires more complex control and layout | Select when precise per-channel grayscale control is required beyond basic on/off or analog dimming |
| STP16CP05MTR | 16-channel sink driver with similar Rext current setting, but no thermal shutdown, lower max output voltage (13 V), SO-24 package | Cost-optimized for fixed-brightness applications where thermal margin is guaranteed | Select for cost-sensitive consumer panels with stable thermal environment and shorter LED strings |
Compared with TLC5925IDBQR, TLC5940IPWP offers advanced grayscale control at higher system complexity, while STP16CP05MTR reduces cost and feature set for thermally benign, low-voltage LED arrays - making TLC5925IDBQR the balanced choice for industrial signage and gaming displays needing reliability, headroom, and simplicity.
Availability
TLC5925IDBQR is available at Aetrix Electronics and suitable for LED signage, gaming machine displays, and white goods indicator lighting requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TLC5925IDBQR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and consumer markets since 1930.
The TLC5925IDBQR belongs to TI's LED driver product line, engineered specifically for high-accuracy, low-noise constant-current sinking in commercial and industrial LED display systems - prioritizing thermal resilience, inter-device consistency, and ease of serial interface integration.
FAQ
What is the maximum output voltage supported by the TLC5925IDBQR?
The TLC5925IDBQR supports a maximum output voltage of 17 V across its OUT0–OUT15 pins. This allows driving longer LED strings - for example, five 3.2-V white LEDs in series - without requiring external boost circuitry. The 17-V rating is specified under recommended operating conditions and remains valid across the full –40°C to +125°C temperature range.
How does the external resistor (R-EXT) set the output current in the TLC5925IDBQR?
The TLC5925IDBQR uses an external resistor connected between the R-EXT pin and GND to set all 16 output currents simultaneously. The relationship is IOUT = (1.21 V / REXT) × 18. For example, a 840-Ω resistor yields ~26 mA per channel, while 1680 Ω yields ~13 mA. This linear scaling provides predictable, board-level current tuning without firmware intervention.
Does the TLC5925IDBQR support daisy-chaining with other LED drivers?
Yes, the TLC5925IDBQR supports daisy-chaining via its SDO (serial data out) and SDI (serial data in) pins. Data shifted into one device's SDI appears at its SDO after 16 clocks, enabling seamless cascade of multiple TLC5925IDBQR units using a single microcontroller SPI interface - essential for large LED matrices requiring >16 outputs.
What is the thermal shutdown behavior of the TLC5925IDBQR?
The TLC5925IDBQR incorporates thermal shutdown that activates between 150°C and 200°C junction temperature, disabling all outputs until junction temperature drops by ≥15°C (hysteresis). This protects the device during sustained overcurrent, poor PCB heatsinking, or ambient temperature excursions - a critical safeguard in enclosed LED signage and gaming cabinet designs.
What package type is used for the TLC5925IDBQR, and what are its key mechanical attributes?
The TLC5925IDBQR uses the SSOP-24 (DBQ) package: 24-pin shrink small-outline package with 0.65-mm lead pitch, 8.65 mm × 3.90 mm body size, and 1.45-mm maximum height. It is RoHS-compliant, has NIPDAU lead finish, and carries JEDEC MSL Level-2 moisture sensitivity rating (1-year floor life at 260°C peak reflow).
TLC5925IDBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 45mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-SSOP
TLC5925IDBQR FAQ
1.How can I place an order for TLC5925IDBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5925IDBQR 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 TLC5925IDBQR reliable?
The price and inventory of TLC5925IDBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5925IDBQR is usually 5 days.
3.What payment methods are accepted for TLC5925IDBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5925IDBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5925IDBQR?
TLC5925IDBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5925IDBQR 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 TLC5925IDBQR?
For technical support, including TLC5925IDBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5925IDBQR requirements.
6.How does Aetrix verify that TLC5925IDBQR is sourced from the original manufacturer or authorized distributors?
All TLC5925IDBQR 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 TLC5925IDBQR meets industry standards.
7.What is the process for return or replacement of TLC5925IDBQR?
All TLC5925IDBQR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5925IDBQR, 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 TLC5925IDBQR part is unused and in its original packaging.
Return procedure for TLC5925IDBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5925IDBQR Tags
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