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Texas Instruments TLC5926IPWPRG4
- Part No.:
- TLC5926IPWPRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5926IPWPRG4.pdf
- Description:
- IC LED DRVR LIN 120MA 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,287
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Product details
Overview
TLC5926IPWPRG4 from Texas Instruments is a 16-channel constant-current LED sink driver IC designed for LED display and lighting systems requiring precise current regulation, open-load fault detection, and serial daisy-chain control. It delivers 5–120 mA per channel with ±6% inter-channel and inter-device accuracy, operates from 3.0 V to 5.5 V supply, supports up to 30 MHz clock frequency, and features integrated thermal shutdown and error reporting via SDO. It is used in high-reliability LED signage panels where uniform brightness and fault visibility are critical.
For engineers reviewing the TLC5926IPWPRG4 datasheet, TLC5926IPWPRG4 pinout, TLC5926IPWPRG4 application, or TLC5926IPWPRG4 equivalent, this page provides verified technical context, validated pin functions, confirmed current regulation behavior across load voltage variation, real-world error detection timing, and two rigorously cross-checked alternative parts with documented functional distinctions.
Technical Context
The TLC5926IPWPRG4 integrates a 16-bit shift register, parallel output latches, and 16 independent regulated-current sinks-all controlled via three logic inputs (CLK, LE(ED1), OE(ED2)) and one analog reference (R-EXT). Its architecture separates data shifting (serial-in/serial-out) from latching (parallel output enable) and blanking (global output disable), enabling synchronized multi-device cascading without ghosting.
It implements open-load detection by comparing actual output current against a 0.5% × IOUT,target threshold during active drive; error status is read back via SDO in Special Mode. Unlike the TLC5927, it lacks short-circuit detection-only global and per-channel overtemperature shutdown (trip ~170°C) and restart hysteresis (15°C) are supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs (OUT0–OUT15); each independently controllable via serial data latch |
| Output current range | 5 mA to 120 mA per channel, set by external R-EXT resistor; invariant to output voltage changes up to 17 V |
| Current accuracy | ±6% max between channels and between ICs (10–50 mA range); enables consistent LED brightness across arrays |
| Supply voltage | 3.0 V to 5.5 V logic supply (VDD); supports direct interface with 3.3 V or 5 V microcontrollers |
| Max clock frequency | 30 MHz; allows fast refresh of large LED matrices (e.g., 16×16 panels) with minimal frame latency |
| Error detection | Open-load and overtemperature detection only; error status reported serially via SDO in Special Mode |
| Thermal protection | Global shutdown at ~170°C with 15°C hysteresis; individual channel shutdown also available |
Pinout & Package
Package: HTSSOP-24 (7.80 mm × 4.40 mm), thermally enhanced with exposed pad tied to GND.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return for logic and current-sink paths; must be low-impedance connection to minimize noise and thermal rise |
| SDI (Pin 2) | Serial data input | Accepts 3.3 V/5 V CMOS-level data; feeds 16-bit shift register on CLK rising edge |
| CLK (Pin 3) | Clock input | Rising-edge-triggered; minimum pulse width 20 ns; drives shift register and SDO timing |
| LE(ED1) (Pin 4) | Latch enable / mode control | Pulsed low-to-high to latch shift register to output latch; also selects Special Mode (Error Detection/Current Adjust) when combined with OE(ED2) pulse |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each delivers regulated current to LED cathodes; supports up to 17 V anode voltage (e.g., high-VF white LEDs) |
| R-EXT (Pin 23) | Current reference input | Connects external resistor (e.g., 720 Ω for 26 mA); sets all 16 channels identically; tolerance directly impacts absolute current accuracy |
| SDO (Pin 22) | Serial data output | Shifts out latched data or error status code; enables daisy-chaining multiple TLC5926IPWPRG4 devices |
| OE(ED2) (Pin 21) | Output enable / mode control | Active-low enables current sinks; single-clock pulse initiates Special Mode transition; internal pullup ensures safe default-off state |
| VDD (Pin 24) | Logic supply | 3.0–5.5 V power for internal logic and shift register; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Enables uniform LED brightness across large displays without per-channel resistors or calibration |
| Open-load detection | Identifies failed/open LED strings in real time; status readable via SDO-critical for outdoor signage reliability monitoring |
| 256-step programmable global current gain | Allows fine-tuning of all 16 channels simultaneously (1/12 to 127/128 steps); supports white-balancing in RGB panels |
| 30 MHz serial interface | Supports rapid update of full 16-channel state in <533 ns; eliminates visible flicker in high-refresh-rate applications |
| Schmitt-trigger inputs | Ensures noise immunity on CLK, LE(ED1), OE(ED2), and SDI-essential in electrically noisy industrial LED cabinets |
| Thermal shutdown with hysteresis | Prevents damage during sustained overloads or poor heatsinking; automatic recovery avoids system lockup |
Applications
| LED Display Panels | Architectural LED Lighting |
|---|---|
|
Use Scenario: Driving 16×16 pixel monochrome LED matrix in indoor digital signage. IC Role / Device Role / Timing Role: Serial-to-parallel current sink driver; receives SPI-like data from FPGA, latches per-frame intensity values, and sinks current to LED cathodes. Use Value: Eliminates 256 discrete current-limiting resistors; ±6% channel matching ensures uniform pixel luminance across entire panel. |
Use Scenario: Controlling segmented linear LED strips in commercial building façade lighting. IC Role / Device Role / Timing Role: Constant-current sink for grouped LED segments; daisy-chained across multiple PCBs to reduce wiring complexity. Use Value: Open-load detection flags broken segments remotely; 17 V output capability supports long series strings of high-VF white LEDs. |
| Industrial Control Panels | Appliance Status Indicators |
|
Use Scenario: Backlighting operator interface LEDs in factory HMIs exposed to wide temperature swings. IC Role / Device Role / Timing Role: Current-regulated driver with thermal shutdown; interfaces to ARM Cortex-M MCU via GPIO bit-banged SPI. Use Value: Overtemperature protection prevents LED dimming or failure at 85°C ambient; ±6% inter-IC accuracy maintains consistent indicator brightness across multiple panels. |
Use Scenario: Power-on/status LED array in smart refrigerator control board. IC Role / Device Role / Timing Role: Low-pin-count LED driver replacing discrete transistors and resistors; shares MCU's 3.3 V rail. Use Value: R-EXT-based current setting simplifies BOM; SDO feedback enables firmware verification of LED connectivity during startup self-test. |
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 does not); identical pinout, package, and current specs | Required where LED string short faults must be distinguished from opens (e.g., automotive interior lighting) | Select TLC5927IPWPR only if short-circuit diagnostics are mandatory; otherwise TLC5926IPWPRG4 offers lower cost and same core functionality |
| MAX7219CWG+ | 8-channel vs 16-channel; includes built-in BCD decode, scan limit, intensity control registers; SPI-native interface | Better suited for 7-segment or 8×8 matrix with integrated display control; lacks open-load detection and >120 mA capability | Choose MAX7219CWG+ for simpler 8-output designs with display-specific features; avoid when >8 channels, >120 mA, or open-load reporting are needed |
Compared with TLC5927IPWPR, TLC5926IPWPRG4 omits short-circuit detection but retains identical thermal protection, current accuracy, and daisy-chain capability-making it optimal for cost-sensitive LED signage where open-load visibility suffices. Versus MAX7219CWG+, it doubles channel count and supports higher current and voltage, at the expense of integrated display logic.
Availability
TLC5926IPWPRG4 is available at Aetrix Electronics and suitable for LED display panels, architectural lighting systems, and industrial HMI applications requiring stable component supply, long-term production continuity, and traceable sourcing.
Supply support for TLC5926IPWPRG4 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 ICs for industrial, automotive, and consumer markets.
The TLC5926IPWPRG4 belongs to TI's LED driver portfolio, engineered specifically for high-channel-count, constant-current LED systems demanding fault visibility, thermal resilience, and seamless serial scalability.
FAQ
What is the maximum output voltage the TLC5926IPWPRG4 can handle at its OUT pins?
The TLC5926IPWPRG4 supports up to 17 V at its OUT0–OUT15 pins, enabling direct drive of high-forward-voltage LED strings (e.g., 5-white-LED series at ~3.4 V each). This rating is independent of VDD and applies under both active current-sinking and off-state conditions, ensuring compatibility with common 12 V and 24 V LED power rails when used as a low-side switch.
Does the TLC5926IPWPRG4 support short-circuit detection like the TLC5927?
No, the TLC5926IPWPRG4 does not support short-circuit detection. Its error detection is limited to open-load and overtemperature conditions only. The TLC5927IPWPR adds short-circuit detection using dual voltage thresholds (VOUT,TTh and VOUT,RTh)-a feature absent in the TLC5926IPWPRG4 per TI's device comparison table and functional descriptions.
How is output current set on the TLC5926IPWPRG4, and what resistor value yields 60 mA per channel?
Output current is set by an external resistor R-EXT connected to Pin 23. For 60 mA per channel, use R-EXT = 360 Ω (per TI's Electrical Characteristics tables at VOUT = 0.8 V, CG = 0.992). The relationship is IOUT ≈ 19.2 V / REXT; tighter tolerance resistors (≤1%) improve absolute current accuracy given the ±6% inherent channel matching.
Can multiple TLC5926IPWPRG4 devices be daisy-chained, and how is error status read from the chain?
Yes, multiple TLC5926IPWPRG4 devices can be daisy-chained using SDI → SDO connections. To read error status, the system controller places all devices in Special Mode (via OE(ED2) and LE(ED1) pulses), then clocks 16 bits out of the last device's SDO-each bit corresponds to one channel's open-load or overtemperature status across the entire chain.
What is the function of the LE(ED1) and OE(ED2) pins beyond basic latching and output enable?
LE(ED1) and OE(ED2) serve dual roles: in Normal Mode, LE(ED1) latches shift-register data to outputs and OE(ED2) enables sinking; in Special Mode, their coordinated pulses initiate error reporting or 256-step current gain programming. LE(ED1) has an internal pulldown and OE(ED2) an internal pullup-ensuring defined states during power-up or MCU reset.
TLC5926IPWPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TLC5926IPWPRG4 FAQ
1.How can I place an order for TLC5926IPWPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5926IPWPRG4 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 TLC5926IPWPRG4 reliable?
The price and inventory of TLC5926IPWPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5926IPWPRG4 is usually 5 days.
3.What payment methods are accepted for TLC5926IPWPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5926IPWPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5926IPWPRG4?
TLC5926IPWPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5926IPWPRG4 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 TLC5926IPWPRG4?
For technical support, including TLC5926IPWPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5926IPWPRG4 requirements.
6.How does Aetrix verify that TLC5926IPWPRG4 is sourced from the original manufacturer or authorized distributors?
All TLC5926IPWPRG4 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 TLC5926IPWPRG4 meets industry standards.
7.What is the process for return or replacement of TLC5926IPWPRG4?
All TLC5926IPWPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5926IPWPRG4, 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 TLC5926IPWPRG4 part is unused and in its original packaging.
Return procedure for TLC5926IPWPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5926IPWPRG4 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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