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Texas Instruments TLC5926QPWPRQ1
- Part No.:
- TLC5926QPWPRQ1
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5926QPWPRQ1.pdf
- Description:
- IC LED DRVR LIN 120MA 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,800
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Product details
Overview
TLC5926QPWPRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified 16-channel constant-current LED sink driver for automotive lighting and display systems. It delivers precise 5–120 mA per channel via external R-EXT resistor, maintains current accuracy <±6% (channel-to-channel), supports up to 17 V LED supply (VLED), and operates from 3.0 V to 5.5 V logic supply (VDD). Used in adaptive headlamp modules and segmented dashboard displays.
For engineers reviewing the TLC5926QPWPRQ1 datasheet, TLC5926QPWPRQ1 pinout, TLC5926QPWPRQ1 application, or TLC5926QPWPRQ1 equivalent, key selection criteria include open-load detection capability, 30 MHz serial clock tolerance, thermal shutdown behavior at 150–200 °C, and HTSSOP-24 package compatibility with automotive PCB layout constraints.
Technical Context
The TLC5926QPWPRQ1 integrates a 16-bit shift register, parallel output latches, and 16 independent constant-current sinks with per-channel overtemperature sensing. Its error detection architecture uses dedicated OE(ED2) and LE(ED1) pins to enter Special Mode for reading open-load status bits - no short-circuit detection (unlike TLC5927-Q1).
Current regulation is achieved via external R-EXT tied to internal reference voltage; output current scales linearly with 1/R-EXT while remaining invariant to VLED changes from 1 V to 17 V. Schmitt-trigger inputs ensure noise immunity on CLK, SDI, LE(ED1), and OE(ED2) across –40°C to 125°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VDD Range | 3.0 V to 5.5 V - supports both 3.3 V and 5 V microcontroller interfaces without level-shifting |
| Output Current | 5 mA to 120 mA per channel - set globally by single R-EXT; enables uniform brightness across multi-color LED arrays |
| Current Accuracy | < ±6% (channel-to-channel, 10–50 mA) - ensures consistent luminance without per-channel calibration |
| Max VLED | 17 V - allows driving 5-white-LED strings (≈15 V VF) with margin for ripple and drop |
| CLK Frequency | 30 MHz - enables full 16-bit update in ≤533 ns, critical for flicker-free PWM dimming at >1 kHz |
| Error Detection | Open-load & overtemperature only - status read via SDO in Special Mode; no short-circuit detection (TLC5927 exclusive) |
| Thermal Shutdown | 150–200 °C trip range with 15 °C hysteresis - protects against sustained overcurrent or poor heatsinking in enclosed housings |
Pinout & Package
HTSSOP-24 package (7.80 mm × 4.40 mm) with exposed thermal pad requiring solder connection to GND for thermal performance (RθJA = 42.7 °C/W on 4-layer board).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Reference ground | Common return for logic control and all 16 current sinks; must be low-impedance path to minimize noise coupling |
| SDI (Pin 2) | Serial data input | Accepts 3.3/5 V logic; feeds 16-bit shift register; supports daisy-chaining multiple drivers |
| CLK (Pin 3) | Clock input | Rising-edge triggered; 30 MHz max; Schmitt-triggered for robust timing in noisy automotive environments |
| LE(ED1) (Pin 4) | Latch enable / mode control | Latches shift register to output latch in Normal Mode; selects Error Detection or Current Gain mode in Special Mode |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each drives LED cathode; rated for 120 mA DC, 17 V reverse voltage; floating when disabled |
| R-EXT (Pin 23) | Current-setting reference | Connects external resistor to set all 16 channels' current; value determines IOUT = 12.5 V / REXT |
| SDO (Pin 22) | Serial data output | Shifts out error status bits (open-load/overtemp) or configuration code in Special Mode; enables cascaded readback |
| OE(ED2) (Pin 21) | Output enable / mode trigger | Active-low enables current sinks; one-clock pulse initiates Special Mode entry for diagnostics or gain adjustment |
| VDD (Pin 24) | Logic supply | Powers internal logic and shift register; decoupling capacitor required within 10 mm of pin |
Key Features
| Feature | Design Value |
|---|---|
| 16 independent constant-current sinks | Enables pixel-level control in segmented displays; unused channels may float without affecting others |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - suitable for under-hood and instrument cluster mounting |
| Open-load and overtemperature detection | Per-channel fault reporting via SDO; eliminates need for external sense resistors or monitoring ICs |
| 256-step programmable global current gain | Runtime-adjustable brightness scaling without changing R-EXT hardware - supports dynamic dimming profiles |
| Schmitt-trigger inputs | Ensures reliable CLK/SDI/LE/OE sampling despite slow-rising signals or EMI in vehicle harnesses |
Applications
| Automotive Adaptive Front Lighting | Instrument Cluster Display |
|---|---|
|
Use Scenario: Individual LED control in matrix headlamp units for dynamic beam shaping and glare-free high-beam assist. IC Role / Device Role / Timing Role: Constant-current sink driver managing 16 independent LED segments; synchronized via SPI-like serial interface. Use Value: Enables precise per-pixel current control (5–120 mA) to maintain photometric compliance across temperature and aging - no recalibration needed. |
Use Scenario: Driving multiplexed 7-segment or dot-matrix displays in digital dashboards with variable ambient light conditions. IC Role / Device Role / Timing Role: LED current controller with integrated open-load detection to flag failed segments before driver notification. Use Value: Reduces BOM count by eliminating discrete current-limiting resistors and external fault monitors - improves system MTBF. |
| Commercial Vehicle Signage | White Goods Status Indicators |
|
Use Scenario: High-reliability LED message boards on buses and trucks exposed to vibration, wide temperature swings, and ESD events. IC Role / Device Role / Timing Role: Fault-tolerant LED driver with thermal shutdown and open-load reporting for predictive maintenance alerts. Use Value: Maintains ±6% current matching across channels despite 125°C junction temperatures - prevents visible brightness drift during operation. |
Use Scenario: Multi-color status indicators on refrigerators, washing machines, and ovens requiring long-life, low-maintenance illumination. IC Role / Device Role / Timing Role: Constant-current sink enabling RGB LED mixing with stable color point over 10+ year service life. Use Value: Single R-EXT resistor sets identical current for red/green/blue LEDs - simplifies factory calibration and reduces test time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5927QPWPRQ1 | Includes short-circuit detection (VOUT,TTh = 2.3–3.2 V); otherwise identical pinout, specs, and package | Required where LED string short faults must be distinguished from open faults (e.g., high-density signage with shared VLED rails) | Select TLC5927QPWPRQ1 only if short-circuit diagnostics are mandatory; otherwise TLC5926QPWPRQ1 offers lower cost and same core functionality |
| MAX16832ATP+ | 4-channel, analog current control; no serial interface; requires external PWM for dimming; no fault reporting | Suitable for simple, fixed-brightness LED arrays where channel count and diagnostics are secondary to thermal efficiency | Choose MAX16832ATP+ for cost-sensitive, low-channel-count designs without diagnostic requirements - not a drop-in replacement |
Compared with TLC5927QPWPRQ1, TLC5926QPWPRQ1 omits short-circuit detection but retains identical open-load/thermal diagnostics, timing, and current accuracy - making it optimal for applications where short faults are mitigated by system-level design. Versus MAX16832ATP+, TLC5926QPWPRQ1 provides higher integration, serial control, and comprehensive fault visibility at higher channel density.
Availability
TLC5926QPWPRQ1 is available at Aetrix Electronics and suitable for automotive lighting, instrument cluster displays, and commercial signage requiring stable component supply with AEC-Q100 compliance and extended temperature support.
Supply support for TLC5926QPWPRQ1 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 and embedded processing technologies, with deep expertise in automotive-grade power management and signal chain solutions.
The TLC592x-Q1 product line was designed specifically for high-reliability LED lighting in automotive and industrial environments, emphasizing fault resilience, thermal robustness, and seamless integration with microcontroller-based lighting controllers.
FAQ
What is the maximum output voltage (VLED) rating for the TLC5926QPWPRQ1?
The TLC5926QPWPRQ1 supports up to 17 V at its OUT0–OUT15 pins. This allows driving LED strings with total forward voltage up to ~15 V (e.g., five 3 V white LEDs) while maintaining margin for supply ripple and PCB trace drop. Operation above 17 V risks permanent damage per absolute maximum ratings.
Does the TLC5926QPWPRQ1 support short-circuit detection like the TLC5927-Q1?
No. The TLC5926QPWPRQ1 implements open-load and overtemperature detection only. Short-circuit detection is exclusive to the TLC5927QPWPRQ1 variant, which adds voltage-threshold comparators on each output. If short-circuit reporting is required, TLC5927QPWPRQ1 must be used instead.
How is output current set on the TLC5926QPWPRQ1?
Output current for all 16 channels is set by a single external resistor (R-EXT) connected between the R-EXT pin and GND. The relationship is IOUT ≈ 12.5 V / REXT, yielding 5–120 mA range. For example, 720 Ω gives ~17.4 mA per channel; 360 Ω gives ~34.7 mA.
What package type and thermal requirements apply to the TLC5926QPWPRQ1?
The TLC5926QPWPRQ1 uses the HTSSOP-24 package (7.80 mm × 4.40 mm) with an exposed thermal pad. TI mandates soldering this pad directly to a GND plane for thermal performance - RθJA drops from 63.9 °C/W (1-layer board) to 42.7 °C/W (4-layer board) with proper pad connection.
Can the TLC5926QPWPRQ1 be daisy-chained with other LED drivers?
Yes. The TLC5926QPWPRQ1 supports serial cascade operation using SDI (input) and SDO (output). Data shifts through multiple devices with shared CLK and LE(ED1); OE(ED2) remains common. Up to 32 devices can be chained at 30 MHz clock rate without timing violation.
TLC5926QPWPRQ1 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TLC5926QPWPRQ1 FAQ
1.How can I place an order for TLC5926QPWPRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5926QPWPRQ1 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 TLC5926QPWPRQ1 reliable?
The price and inventory of TLC5926QPWPRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5926QPWPRQ1 is usually 5 days.
3.What payment methods are accepted for TLC5926QPWPRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5926QPWPRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5926QPWPRQ1?
TLC5926QPWPRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5926QPWPRQ1 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 TLC5926QPWPRQ1?
For technical support, including TLC5926QPWPRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5926QPWPRQ1 requirements.
6.How does Aetrix verify that TLC5926QPWPRQ1 is sourced from the original manufacturer or authorized distributors?
All TLC5926QPWPRQ1 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 TLC5926QPWPRQ1 meets industry standards.
7.What is the process for return or replacement of TLC5926QPWPRQ1?
All TLC5926QPWPRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5926QPWPRQ1, 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 TLC5926QPWPRQ1 part is unused and in its original packaging.
Return procedure for TLC5926QPWPRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5926QPWPRQ1 Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
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LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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