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Texas Instruments TLC5948ADBQR
- Part No.:
- TLC5948ADBQR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
TLC5948ADBQR.pdf
- Description:
- IC LED DRIVER LINEAR 60MA 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,349
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Product details
Overview
TLC5948ADBQR from Texas Instruments is a 16-channel, 16-bit enhanced-spectrum PWM LED driver with 7-bit dot correction and 7-bit global brightness control. It delivers constant-current sink outputs (2–60 mA per channel), supports up to 10 V LED supply voltage, operates from 3.0–5.5 V VCC, and features integrated open/short/leakage/thermal error detection for high-reliability LED video displays.
For engineers reviewing the TLC5948ADBQR datasheet, TLC5948ADBQR pinout, TLC5948ADBQR application, or TLC5948ADBQR equivalent, key selection criteria include its 16-bit grayscale resolution, ±0.6% typical channel-to-channel current matching, daisy-chainable serial interface (33 MHz SCLK/GSCLK), self-diagnostic flags (LOD/LSD/TEF/ISF), and SSOP-24 package thermal performance (θJA = 80.4°C/W).
Technical Context
The TLC5948ADBQR implements an enhanced-spectrum PWM (ES-PWM) timing architecture with dual 16-bit grayscale data latches and auto-display repeat functionality. Its 257-bit common shift register accepts serial data via SIN/SCLK, then routes it to either grayscale or control latches based on the MSB value at LAT edge.
Error detection is fully integrated: LED open detection (LOD) uses four programmable threshold codes (0h–3h); LED short detection (LSD) scales with VCC; thermal shutdown triggers at 150°C with 5–20°C hysteresis; and IREF short flag (ISF) activates when IREF is pulled below 0.3 V. All flags are readable via SOUT after LAT assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 constant-current sink outputs (OUT0–OUT15), each individually controllable |
| Grayscale resolution | 16-bit (65,536 steps) ES-PWM for flicker-free, high-fidelity LED intensity control |
| Dot correction | 7-bit (128 steps, 0%–100% range) per channel to compensate LED binning variance |
| Global BC | 7-bit (128 steps, 25%–100% range) to uniformly scale all 16 channels' output current |
| Sink current range | 2–45 mA (VCC ≤3.6 V) or 2–60 mA (VCC >3.6 V), set by single RIREF resistor |
| Data rate | 33 MHz SCLK and GSCLK support fast refresh in large LED arrays (e.g., 1920×1080 panels) |
| Operating temp | –40°C to +85°C ambient, with thermal shutdown at +150°C junction temperature |
Pinout & Package
Package: SSOP-24 (DBQ), 0.154-inch body width, PowerPAD™ not present (PWP variant only). Thermal resistance θJA = 80.4°C/W enables operation at full load without forced air in industrial enclosures.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (1) | Power ground reference | Common return path for all internal current sinks and logic; must be low-impedance |
| SIN (2) | Serial data input | 257-bit shift register LSB entry point; synchronous to SCLK rising edge |
| SCLK (3) | Data shift clock | Drives serial data propagation through shift register; max 33 MHz frequency |
| LAT (4) | Data latch control | Rising edge transfers shift register contents to first GS or control latch based on MSB |
| OUT0–OUT15 (5–20) | Constant-current sink outputs | Each drives one LED cathode; supports parallel connection for higher current per segment |
| GSCLK (21) | Grayscale PWM clock | Controls 16-bit counter for ES-PWM timing; resets to zero when BLANK = 1 |
| SOUT (22) | Serial status output | Shifts out 257-bit status data (LOD/LSD/OLD/TEF/ISF) after LAT assertion |
| IREF (23) | Reference current terminal | RIREF resistor to GND sets max sink current; shorting to GND forces outputs off and asserts ISF |
| VCC (24) | Supply voltage | 3.0–5.5 V logic and analog supply; powers internal reference, logic, and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| Invisible LED fault detection | LOD and LSD operate during active display time without visible flicker or blanking interruption |
| Four-channel grouped delay switching | Reduces inrush current by staggering turn-on of OUT0/7/8/15, OUT1/6/9/14, etc. |
| Pre-thermal warning (PTW) | Asserts flag at 125–150°C junction temperature, enabling proactive thermal derating before shutdown |
| Auto display repeat & refresh | Eliminates external controller overhead for continuous static image display |
| Power-save mode | Reduces VCC current to <40 µA by disabling GSCLK and output drivers while retaining register state |
Applications
| LED Video Displays | LED Signboards |
|---|---|
Use Scenario: High-resolution indoor/outdoor video walls requiring uniform brightness and long-term luminance stability. IC Role / Device Role / Timing Role: Primary grayscale driver for 16 LED pixels per IC; handles 16-bit ES-PWM timing, dot correction, and real-time fault reporting. Use Value: ±0.6% channel-to-channel current matching ensures pixel-level uniformity; LOD/LSD detection prevents hot-spot failures in unattended installations. | Use Scenario: Large-format outdoor signage with variable ambient lighting and extended duty cycles. IC Role / Device Role / Timing Role: Constant-current sink controller managing red/green/blue LED strings; coordinates global brightness scaling across multiple daisy-chained devices. Use Value: 7-bit global BC allows dynamic daylight/nighttime brightness adjustment; thermal shutdown (150°C) protects against enclosure overheating. |
| Architectural Lighting | Stage & Entertainment Lighting |
Use Scenario: RGBW linear fixtures with precise color mixing and smooth dimming curves. IC Role / Device Role / Timing Role: Per-channel current regulator for individual R/G/B/W LEDs; applies 7-bit dot correction to match forward-voltage variances across LED lots. Use Value: 16-bit grayscale eliminates visible stepping in deep dimming; power-save mode (<40 µA) enables always-on standby with instant wake-up. | Use Scenario: Moving-head and wash lights demanding rapid intensity transitions and fault resilience. IC Role / Device Role / Timing Role: High-speed PWM driver synchronizing with DMX512 or Art-Net controllers via SPI-like serial interface. Use Value: 33 MHz SCLK/GSCLK supports sub-millisecond frame updates; invisible LOD/LSD detection maintains show continuity during live events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5947DBQR | 16-channel, 12-bit grayscale (4096 steps), no ES-PWM; lacks PTW, OLD, and grouped delay switching | Suitable for cost-sensitive signage where 16-bit fidelity and advanced diagnostics are unnecessary | Select when lower grayscale depth and reduced diagnostic coverage are acceptable trade-offs for BOM cost reduction |
| MAX7219CWG+ | 8-channel, 10-bit PWM; integrated scan controller; no dot correction or thermal monitoring | Targeted at 7-segment/matrix displays, not high-fidelity RGB video walls | Choose only for simple alphanumeric or low-resolution matrix applications-not for precision LED video systems |
Compared with TLC5947DBQR and MAX7219CWG+, the TLC5948ADBQR provides superior grayscale fidelity (16-bit vs. 12-/10-bit), comprehensive self-diagnosis (LOD/LSD/OLD/TEF/ISF/PTW), and thermal-aware operation-making it the only option qualified for mission-critical LED video infrastructure.
Availability
TLC5948ADBQR is available at Aetrix Electronics and suitable for LED video displays, architectural lighting, stage lighting, and outdoor signboards requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TLC5948ADBQR 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 digital signal technologies with over 90 years of innovation in power management and signal chain solutions.
The TLC5948A product line was designed specifically for high-reliability, high-fidelity LED video and signage systems requiring precise current matching, real-time fault detection, and robust thermal management in industrial environments.
FAQ
What is the maximum sink current per channel for the TLC5948ADBQR?
The TLC5948ADBQR supports 2–45 mA per channel when VCC ≤3.6 V, and 2–60 mA when VCC >3.6 V. The exact value is set by the external RIREF resistor (e.g., 1.13 kΩ yields 45 mA typical). Current accuracy is ±0.6% typical channel-to-channel matching, verified across –40°C to +85°C ambient temperature.
How does the TLC5948ADBQR handle LED open-circuit faults?
The TLC5948ADBQR performs LED open detection (LOD) using four programmable voltage thresholds (0.25–1.25 V) that are sampled during active display time-ensuring invisible detection without visible flicker. Detected faults are reported in the status data shifted out via SOUT after each LAT pulse, enabling real-time system-level response.
Can the TLC5948ADBQR be daisy-chained, and what is the maximum number of devices?
Yes, the TLC5948ADBQR supports seamless daisy-chaining: SOUT of one device connects to SIN of the next, sharing SCLK, LAT, and GSCLK. There is no hard limit on chain length; practical constraints are total propagation delay and SCLK timing margin. For 33 MHz operation, chains exceeding 10 devices require careful PCB layout to maintain setup/hold times.
What is the function of the IREF pin on the TLC5948ADBQR?
The IREF pin on the TLC5948ADBQR serves as the reference current terminal: connecting a resistor (RIREF) between IREF and GND sets the maximum sink current for all 16 channels. Shorting IREF to GND forces all outputs off and asserts the IREF short flag (ISF) in the status register-providing hardware-level fault indication.
Does the TLC5948ADBQR support power-saving modes, and how much current does it draw?
Yes, the TLC5948ADBQR includes a dedicated power-save mode activated by writing PSMODE = 110b and BLANK = 1. In this state, GSCLK is disabled and output drivers are turned off while retaining register contents, reducing VCC supply current to ≤40 µA at +25°C-ideal for always-on signage with instant wake-up capability.
TLC5948ADBQR 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:
- 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-SSOP
TLC5948ADBQR FAQ
1.How can I place an order for TLC5948ADBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5948ADBQR 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 TLC5948ADBQR reliable?
The price and inventory of TLC5948ADBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5948ADBQR is usually 5 days.
3.What payment methods are accepted for TLC5948ADBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5948ADBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5948ADBQR?
TLC5948ADBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5948ADBQR 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 TLC5948ADBQR?
For technical support, including TLC5948ADBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5948ADBQR requirements.
6.How does Aetrix verify that TLC5948ADBQR is sourced from the original manufacturer or authorized distributors?
All TLC5948ADBQR 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 TLC5948ADBQR meets industry standards.
7.What is the process for return or replacement of TLC5948ADBQR?
All TLC5948ADBQR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5948ADBQR, 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 TLC5948ADBQR part is unused and in its original packaging.
Return procedure for TLC5948ADBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5948ADBQR Tags
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