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Texas Instruments TLC5948APWPR
- Part No.:
- TLC5948APWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5948APWPR.pdf
- Description:
- IC LED DRVR LINEAR 60MA 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,180
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Product details
Overview
TLC5948APWPR from Texas Instruments is a 16-channel, 16-bit enhanced-spectrum PWM LED driver with integrated dot correction (7-bit), global brightness control (7-bit), and full self-diagnosis. It delivers sink current from 2 mA to 60 mA per channel (VCC > 3.6 V), supports up to 10 V LED supply, operates from –40°C to +85°C, and features 33 MHz data and grayscale clocks - used in high-fidelity LED video displays requiring precise grayscale uniformity and fault detection.
For engineers reviewing the TLC5948APWPR datasheet, TLC5948APWPR pinout, TLC5948APWPR application, or TLC5948APWPR equivalent, key selection considerations include its 16-bit ES-PWM timing architecture, per-channel DC calibration, thermal shutdown with pre-warning flag, invisible LOD/LSD detection mode, and HTSSOP-24 PowerPAD™ package for thermal management in dense LED arrays.
Technical Context
The TLC5948APWPR implements an enhanced-spectrum (ES) PWM grayscale engine with 65,536-step resolution and synchronized 16-channel output switching. Its 257-bit serial interface supports daisy-chained configuration, auto-display repeat, and display timing reset for flicker-free operation.
It integrates six real-time error detection circuits - LED open (LOD), short (LSD), output leakage (OLD), IREF short (ISF), pre-thermal warning (PTW), and thermal error (TEF) - all readable via SOUT after LAT assertion. Four-channel grouped delay switching mitigates inrush current during power-up sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs (OUT0–OUT15), individually programmable |
| Grayscale resolution | 16-bit (65,536 steps) ES-PWM with auto-refresh and display timing reset |
| Dot correction | 7-bit (128 steps), 0%–100% range per channel to compensate LED binning variance |
| Global brightness control | 7-bit (128 steps), 25%–100% range across all channels for system-level dimming |
| Sink current range | 2 mA to 45 mA (VCC ≤3.6 V); 2 mA to 60 mA (VCC > 3.6 V), set by single RIREF resistor |
| Data transfer rate | 33 MHz SCLK - enables full 16-bit GS + 7-bit DC + 7-bit BC load in <1.2 µs |
| Operating temperature | –40°C to +85°C ambient; junction up to +125°C with thermal shutdown at +150°C |
Pinout & Package
Package: HTSSOP-24 PowerPAD™ (PWP), thermally enhanced 24-pin exposed-pad package with 0.65 mm pitch; bottom-side PowerPAD improves thermal resistance to board (θJB = 21.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Power ground reference | Primary return path for all internal current sinks and logic; connects to PCB ground plane under PowerPAD |
| SIN (Pin 2) | Serial data input | 257-bit shift register LSB input; accepts GS/DC/BC/control data with SCLK rising edge |
| SCLK (Pin 3) | Serial clock input | Drives data shift into 257-bit register; max 33 MHz; controls SOUT timing |
| LAT (Pin 4) | Latch control input | Rising edge latches data into GS or control registers; triggers error flag readout on SOUT |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | 16 independent, voltage-tolerant (up to 10 V) current sinks; support parallel grouping |
| GSCLK (Pin 21) | Grayscale clock input | 33 MHz PWM timing reference; resets GS counter when BLANK = 1 |
| SOUT (Pin 22) | Status/data output | 257-bit register MSB output; serially shifts out LOD/LSD/OLD/TEF/ISF/PTW status bits |
| IREF (Pin 23) | Reference current terminal | Connects to GND via RIREF (0.846–25.4 kΩ) to set max sink current; shorting triggers ISF flag |
| VCC (Pin 24) | Supply voltage | 3.0 V to 5.5 V logic and analog supply; powers internal regulators, drivers, and interface |
Key Features
| Feature | Design Value |
|---|---|
| 16-bit ES-PWM grayscale control | Enables flicker-free, high-dynamic-range LED dimming with 65,536-step resolution and synchronized channel updates |
| Invisible LED fault detection (IDM) | LOD and LSD operate without visible LED flicker or interruption - critical for live video signage |
| Four-channel grouped delay switching | Staggers turn-on of OUT groups to limit peak inrush current and reduce EMI in multi-driver systems |
| Pre-thermal warning (PTW) flag | Asserts at TJ ≈138°C (typ), enabling proactive thermal derating before TEF triggers at 150°C |
| Power-save mode (<100 µA ICC) | Reduces VCC current by >99% while retaining register state - ideal for standby or low-duty-cycle displays |
| Channel-to-channel current accuracy | ±0.6% (typ), ±2% (max) ensures uniform brightness across all 16 outputs without external calibration |
Applications
| LED Video Wall Panels | Outdoor LED Signboards |
|---|---|
Use Scenario: High-resolution indoor video walls with pixel pitch ≤2.5 mm, requiring seamless grayscale continuity and zero visible artifacts. IC Role / Device Role / Timing Role: Primary grayscale driver per 16-LED module; synchronizes GSCLK across daisy-chained devices for frame-aligned PWM. Use Value: 16-bit ES-PWM eliminates contouring; per-channel DC corrects manufacturing variance; invisible LOD/LSD prevents service interruptions. |
Use Scenario: Large-format outdoor signage exposed to wide temperature swings and long duty cycles, needing robust fault reporting and thermal resilience. IC Role / Device Role / Timing Role: Constant-current sink controller for RGB LED clusters; uses PTW/TEF flags for predictive thermal management. Use Value: Pre-thermal warning enables fan speed ramping before shutdown; ±2% channel matching maintains color fidelity across 10,000+ LEDs. |
| Stage Lighting Fixtures | Architectural LED Strips |
Use Scenario: DMX-controlled moving head lights with dynamic color mixing and strobe effects demanding precise current stability. IC Role / Device Role / Timing Role: Current sink for individual red/green/blue/white LED strings; leverages 33 MHz SCLK for rapid reprogramming between scenes. Use Value: 7-bit global BC enables smooth master dimming; 16-bit GS ensures smooth strobe transitions without banding or stepping. |
Use Scenario: Long-run architectural linear strips (≥5 m) with distributed drivers, requiring consistent brightness over distance and temperature gradients. IC Role / Device Role / Timing Role: Localized current regulation per 16-LED segment; uses four-group delay to suppress surge during power-on sequencing. Use Value: Load regulation ±0.1%/V maintains current stability despite line drop; device-to-device accuracy ±4% minimizes inter-segment mismatch. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947PWR | 16-channel, 12-bit PWM only (no ES-PWM), no PTW/TEF, no invisible detection mode | Lacks thermal warning and fault invisibility - suitable for cost-sensitive indoor signage with lower reliability requirements | Choose when 12-bit grayscale suffices and thermal monitoring is handled externally |
| MAX7219CWG+ | 8-channel, 8-bit multiplexed driver with SPI interface; no DC/BC calibration; max 40 mA/channel | Designed for 7-segment/matrix displays, not linear LED strings; lacks diagnostic flags and GSCLK flexibility | Use only for simple alphanumeric or low-density matrix applications - not a functional substitute for TLC5948APWPR |
Compared with TLC5948APWPR, TLC5947PWR offers lower cost but sacrifices thermal foresight and fault transparency, while MAX7219CWG+ targets entirely different topologies and lacks per-channel calibration - neither provides 16-bit ES-PWM or invisible diagnostics required for premium video-grade LED systems.
Availability
TLC5948APWPR is available at Aetrix Electronics and suitable for LED video displays, outdoor signboards, and stage lighting fixtures requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial production programs.
Supply support for TLC5948APWPR 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 communications markets.
The TLC5948A product line was engineered for high-accuracy, fault-resilient LED driving in professional visual systems - emphasizing grayscale fidelity, thermal intelligence, and real-time diagnostics over basic current sinking.
FAQ
What is the maximum sink current per channel for TLC5948APWPR?
The TLC5948APWPR supports 2 mA to 45 mA per channel when VCC ≤ 3.6 V, and 2 mA to 60 mA when VCC > 3.6 V. This is set by the external RIREF resistor (0.846 kΩ to 25.4 kΩ). At VCC = 5.0 V and RIREF = 0.91 kΩ, typical IOLCMax is 55.8 mA. The TLC5948APWPR maintains ±2% channel-to-channel current matching across this full range.
How does the invisible LED fault detection (IDM) work in TLC5948APWPR?
The TLC5948APWPR performs LED open (LOD) and short (LSD) detection without interrupting normal PWM operation - no visible flicker or brightness change occurs. Detection occurs during dedicated blanking intervals within the GS cycle, using internal voltage thresholds (e.g., VLOD0 = 0.30 V typ). Results are stored in status registers and read via SOUT after LAT assertion.
Can TLC5948APWPR be daisy-chained, and what is the maximum number of devices?
Yes, TLC5948APWPR supports serial daisy-chaining via SIN → SOUT connections. Each device consumes 257 bits per frame (16×16-bit GS + 16×7-bit DC + 7-bit BC + control bits). While no hard upper limit is specified, practical constraints include SCLK timing margin and total propagation delay - TI reference designs demonstrate reliable operation with ≥8 devices in chain using 33 MHz SCLK and proper termination.
What thermal protection features does TLC5948APWPR include?
The TLC5948APWPR integrates three thermal safeguards: pre-thermal warning (PTW) flag asserts at TJ ≈138°C (typ), thermal error flag (TEF) triggers at TJ ≈150°C (typ), and thermal shutdown (TSD) activates at TJ = 165°C (min). Hysteresis (THYS = 5–20°C) prevents oscillation. All flags are readable via SOUT, and the HTSSOP-24 PowerPAD™ package achieves θJB = 21.5°C/W for effective board-level heat dissipation.
Does TLC5948APWPR support power-save mode, and how low is the quiescent current?
Yes, TLC5948APWPR includes a dedicated power-save mode activated by writing PSMODE = 110b and BLANK = 1. In this state, all outputs are disabled, internal clocks halted, and VCC supply current drops to ≤40 µA (typ) at +25°C - a >99% reduction versus active mode (ICC3 = 11–14 mA). Register contents, including GS/DC/BC data, are retained.
TLC5948APWPR 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):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 10V
- Current - Output / Channel:
- 60mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TLC5948APWPR FAQ
1.How can I place an order for TLC5948APWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5948APWPR 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 TLC5948APWPR reliable?
The price and inventory of TLC5948APWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5948APWPR is usually 5 days.
3.What payment methods are accepted for TLC5948APWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5948APWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5948APWPR?
TLC5948APWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5948APWPR 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 TLC5948APWPR?
For technical support, including TLC5948APWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5948APWPR requirements.
6.How does Aetrix verify that TLC5948APWPR is sourced from the original manufacturer or authorized distributors?
All TLC5948APWPR 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 TLC5948APWPR meets industry standards.
7.What is the process for return or replacement of TLC5948APWPR?
All TLC5948APWPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5948APWPR, 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 TLC5948APWPR part is unused and in its original packaging.
Return procedure for TLC5948APWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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