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Texas Instruments TLC5926IPWPR
- Part No.:
- TLC5926IPWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5926IPWPR.pdf
- Description:
- IC LED DRVR LIN 120MA 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:16,076
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Product details
Overview
TLC5926IPWPR from Texas Instruments is a 16-channel constant-current LED sink driver IC designed for high-reliability LED display and lighting systems. It delivers precise, load-voltage-invariant output current (5–120 mA per channel), supports 30 MHz serial clocking, features open-load detection, and operates from 3.0 V to 5.5 V supply - enabling robust LED panel driving in signage and industrial displays.
For engineers reviewing the TLC5926IPWPR datasheet, TLC5926IPWPR pinout, TLC5926IPWPR application, or TLC5926IPWPR equivalent, this page provides verified functional context, validated pin roles, confirmed error-detection behavior, real-world timing constraints, and cross-reference alternatives with documented technical divergence.
Technical Context
The TLC5926IPWPR integrates a 16-bit shift register and parallel output latches to convert serial data into synchronized 16-channel current-sink outputs. Its output stage uses regulated current mirrors referenced to R-EXT, ensuring ±6% inter-channel and inter-device current matching at 10–50 mA.
It supports two operational modes: Normal mode for LED driving via SDI/CLK/LE(ED1)/OE(ED2), and Special mode triggered by OE(ED2) pulse for reading open-load error status via SDO or programming 256-step global current gain. Open-load detection requires active output channels and compares IOUT against 0.5% × IOUT,target.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 independent constant-current sinks, each programmable 5–120 mA via R-EXT resistor |
| Supply voltage | 3.0 V to 5.5 V logic supply; output ports rated to 17 V - enables direct connection to high-VF LED strings |
| Current accuracy | ±6% max between channels and between ICs (10–50 mA range), critical for uniform LED brightness |
| Max clock frequency | 30 MHz - supports fast refresh rates in large LED matrices without data bottleneck |
| Error detection | Open-load detection only (no short-circuit detection); status readable via SDO in Special mode |
| Thermal protection | Global overtemperature shutdown at ~170°C; automatic restart after cooling; error status retained |
| Input interface | Schmitt-trigger inputs on CLK, LE(ED1), OE(ED2), SDI - ensures noise immunity in industrial environments |
Pinout & Package
Packaged in 24-pin HTSSOP (PWP) with 7.80 mm × 4.40 mm body size and exposed thermal pad (to be tied to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return for logic circuitry and current-sink outputs; connects to thermal pad |
| SDI (Pin 2) | Serial data input | Accepts 30 MHz CMOS-level serial data; feeds 16-bit shift register |
| CLK (Pin 3) | Clock input | Rising-edge-triggered; controls bit-shift timing; min pulse width 20 ns |
| LE(ED1) (Pin 4) | Latch enable / Error detect control | High-to-low transition latches shift register to output latch; used with OE(ED2) pulse to enter Special mode |
| OUT0–OUT15 (Pins 5–20) | Constant-current output sinks | Each drives one LED cathode; sinks up to 120 mA; supports 17 V output voltage swing |
| R-EXT (Pin 23) | Current reference input | Connects external resistor to set all 16 output currents simultaneously; tolerance directly impacts accuracy |
| SDO (Pin 22) | Serial data output | Shifts out latched data (Normal mode) or 16-bit error status code (Special mode) |
| OE(ED2) (Pin 21) | Output enable / Error detect trigger | Active-low enables outputs; single-clock pulse initiates Special mode entry |
| VDD (Pin 24) | Logic supply | 3.0–5.5 V power for internal logic; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Enables uniform LED brightness across large arrays without per-channel resistors |
| Open-load detection | Identifies failed/open LED strings during operation; status read via SDO without interrupting display |
| 256-step programmable current gain | Compensates for inter-IC current variation (<1% residual skew), essential for white-balanced RGB panels |
| 30 MHz serial interface | Reduces microcontroller GPIO count and supports cascading multiple drivers for >16-channel systems |
| Thermal shutdown with status retention | Prevents damage during overload; error bits persist post-cooling for diagnostic logging |
Applications
| LED Signage Panels | Industrial HMI Displays |
|---|---|
|
Use Scenario: Outdoor full-color LED video walls requiring consistent brightness and fault monitoring across thousands of LEDs. IC Role / Device Role / Timing Role: Constant-current sink driver with open-load detection; serially controlled via microcontroller SPI interface at ≤30 MHz. Use Value: Eliminates per-LED current-setting resistors, reduces BOM cost, and enables real-time open-LED reporting without display interruption. |
Use Scenario: Factory-floor operator interfaces using high-brightness monochrome LED arrays in dusty, thermally variable environments. IC Role / Device Role / Timing Role: Robust LED driver with Schmitt-trigger inputs and thermal shutdown; driven by industrial PLC or MCU with noise-immune timing. Use Value: Maintains LED visibility under wide temperature swings and prevents field failures via automatic overtemperature response and open-circuit alerts. |
| Architectural LED Lighting | Test Equipment Indicators |
|
Use Scenario: Linear LED strips in commercial buildings where long cable runs cause voltage drop and inconsistent LED drive. IC Role / Device Role / Timing Role: Current-regulated sink with 17 V output headroom; configured via R-EXT for fixed current per segment. Use Value: Delivers stable light output despite varying forward voltage across LED batches and temperature drift. |
Use Scenario: Benchtop test instruments requiring reliable, low-maintenance status indicators with diagnostic feedback. IC Role / Device Role / Timing Role: Fault-aware LED driver; microcontroller reads SDO during startup to verify all indicator LEDs are connected. Use Value: Reduces field service calls by detecting open LEDs before system deployment and logging faults during operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5927IPWPR | Includes short-circuit detection (TLC5926 lacks this); identical pinout, package, and current specs | Required where LED string short-fault monitoring is mandatory (e.g., automotive interior lighting) | Select TLC5927IPWPR only if short-circuit detection is needed; otherwise TLC5926IPWPR offers lower cost and same core functionality |
| MAX7219CWG+ | 8-channel, multiplexed LED driver with integrated scan controller; no open-load detection; SPI interface only | Targets 7-segment or dot-matrix displays, not continuous-current LED strings | Choose MAX7219CWG+ for character-based displays with built-in decoding; avoid for constant-current linear LED arrays |
Compared with TLC5926IPWPR, TLC5927IPWPR adds short-circuit detection at identical cost and footprint, while MAX7219CWG+ trades channel count and current regulation for display-specific features - making TLC5926IPWPR optimal for scalable, high-accuracy LED string driving where open-load monitoring suffices.
Availability
TLC5926IPWPR is available at Aetrix Electronics and suitable for LED signage, industrial HMI displays, and architectural lighting applications requiring stable component supply, long-term production continuity, and traceable sourcing.
Supply support for TLC5926IPWPR 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 high-reliability components for industrial, automotive, and communications markets.
The TLC5926IPWPR belongs to TI's LED driver product line, engineered specifically for high-channel-count, constant-current LED systems demanding precision brightness control, fault diagnostics, and thermal resilience in demanding environments.
FAQ
What is the maximum output voltage rating for TLC5926IPWPR?
The TLC5926IPWPR output pins (OUT0–OUT15) are rated for up to 17 V. This allows direct connection to LED strings with higher forward voltage drops - such as white or blue LEDs in series - without external voltage translation or clamping circuits. The 17 V rating is independent of the 3.0–5.5 V VDD supply and applies under all operating conditions specified in the datasheet.
Does TLC5926IPWPR support short-circuit detection?
No, TLC5926IPWPR does not support short-circuit detection. That feature is exclusive to the TLC5927 variant. TLC5926IPWPR provides open-load detection and overtemperature protection only. If short-circuit monitoring is required, the pin-compatible TLC5927IPWPR must be used instead - both share identical package, pinout, and current specifications.
How is output current set on TLC5926IPWPR?
Output current on TLC5926IPWPR is set globally via an external resistor (R-EXT) connected to Pin 23. The value determines all 16 channels' current using the formula IOUT = 12.5 V / R-EXT. For example, a 720 Ω resistor sets ~17.4 mA per channel. Current can be fine-tuned further using the 256-step programmable gain register accessed in Special mode.
Can TLC5926IPWPR be cascaded with other drivers?
Yes, TLC5926IPWPR supports daisy-chaining via its SDO (Pin 22) and SDI (Pin 2) pins. Serial data shifts through multiple devices in sequence, enabling expansion beyond 16 channels without additional microcontroller pins. Clock timing must meet minimum pulse width (20 ns) and setup/hold requirements - especially critical when cascading at 30 MHz.
What happens to error status after thermal shutdown on TLC5926IPWPR?
After global thermal shutdown, the TLC5926IPWPR retains the error status in its internal register. The status remains readable via SDO in Special mode even after the device cools and automatically resumes operation - provided the output latch remains enabled. The error bits are cleared only when returning to Normal mode, making persistent fault logging possible.
TLC5926IPWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- -
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 120mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TLC5926IPWPR FAQ
1.How can I place an order for TLC5926IPWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5926IPWPR 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 TLC5926IPWPR reliable?
The price and inventory of TLC5926IPWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5926IPWPR is usually 5 days.
3.What payment methods are accepted for TLC5926IPWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5926IPWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5926IPWPR?
TLC5926IPWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5926IPWPR 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 TLC5926IPWPR?
For technical support, including TLC5926IPWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5926IPWPR requirements.
6.How does Aetrix verify that TLC5926IPWPR is sourced from the original manufacturer or authorized distributors?
All TLC5926IPWPR 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 TLC5926IPWPR meets industry standards.
7.What is the process for return or replacement of TLC5926IPWPR?
All TLC5926IPWPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5926IPWPR, 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 TLC5926IPWPR part is unused and in its original packaging.
Return procedure for TLC5926IPWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5926IPWPR Tags
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