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Texas Instruments TLC5924DAPR
- Part No.:
- TLC5924DAPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TLC5924DAPR.pdf
- Description:
- IC LED DRIVER LIN 80MA 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,111
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Product details
Overview
TLC5924DAPR from Texas Instruments is a 16-channel constant-current LED sink driver with 7-bit dot correction (128-step brightness adjustment per channel), pre-charge FETs, LED open detection (LOD), and thermal error flag (TEF). It operates from 3.0 V to 5.5 V supply, supports up to 80 mA per channel, and delivers fast switching (10 ns typical rise/fall time) for high-refresh-rate LED displays.
For engineers reviewing the TLC5924DAPR datasheet, TLC5924DAPR pinout, TLC5924DAPR application, or TLC5924DAPR equivalent, key selection criteria include its HTSSOP-32 PowerPAD™ package, serial 30 MHz interface with MODE-selectable ON/OFF vs. dot-correction data modes, integrated LOD/TEF error reporting via open-drain XERR, and single-resistor current setting via IREF.
Technical Context
The TLC5924DAPR implements dual-mode serial control: MODE = L selects 16-bit ON/OFF register latching on XLAT rising edge; MODE = H enables 112-bit dot-correction register loading with level-triggered XLAT. Each output features a programmable constant-current sink (0–80 mA) and a dedicated pre-charge FET tied to BLANK for inrush current control.
Output delay is graduated-OUT0 has no delay, OUT1 adds 20 ns, OUT2 adds 40 ns, up to OUT15 at 300 ns-to limit peak supply current. LOD detection activates when BLANK = L, ON/OFF bit = 1, and OUTn voltage < 0.3 V (typical); TEF triggers at junction temperature ≥160 °C (typical), both pulling XERR low.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 independent constant-current sink outputs (OUT0–OUT15) |
| Max sink current | 80 mA per channel, set by external IREF resistor (600 Ω min) |
| Dot correction | 7-bit per channel (128 steps), adjustable brightness compensation for LED variance |
| Pre-charge FET | Integrated per-output FET enabling dynamic-drive display image quality improvement |
| Error detection | LED open detection (LOD) and thermal error flag (TEF), both reported via open-drain XERR |
| Serial interface | 30 MHz max SCLK; MODE-selectable 16-bit (ON/OFF) or 112-bit (dot correction) data format |
| Supply range | VCC = 3.0 V to 5.5 V; VUP = 3 V to 15 V (pre-charge rail) |
Pinout & Package
Package: 32-pin HTSSOP with PowerPAD™ (DAP), thermally enhanced for high-current LED driving. Exposed thermal pad must be soldered to PCB ground plane per SLMA002 guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| BLANK (Pin 2) | Global output enable/disable control | High forces all OUTn to VUP (off); low enables programmed ON/OFF or dot-correction states |
| XLAT (Pin 3) | Data latch signal | Rising edge latches ON/OFF data (MODE = L); level-high enables dot-correction write (MODE = H) |
| SCLK (Pin 4) | Serial clock input | Rising edge shifts data into internal shift register; frequency up to 30 MHz |
| SIN (Pin 5) | Serial data input | MSB-first input for ON/OFF (16-bit) or dot-correction (112-bit) data packets |
| IREF (Pin 31) | Reference current setting | Connects to GND via external resistor to set max channel current (IMAX = 40 × VIREF/RIREF) |
| XERR (Pin 29) | Error status output | Open-drain output pulled low on LOD or TEF detection; supports wired-OR across multiple ICs |
| VUP (Pins 6, 27) | Pre-charge power supply | Provides pre-charge voltage (3–15 V) to reduce turn-on delay and improve display fidelity |
| OUT0–OUT15 (Pins 7–8, 10–13, 15–16, 17–18, 20–22, 25–26) | Constant-current sink outputs | Each drives one LED cathode; current accuracy ±1% (typ), load regulation ±2%/V |
Key Features
| Feature | Design Value |
|---|---|
| Graduated output delay | 20 ns step between channels (0–300 ns total) limits inrush current and reduces bypass capacitor requirements |
| Integrated LOD circuit | Detects open-circuit LEDs per channel during active drive (BLANK = L, ON bit = 1, VOUT < 0.3 V) |
| Thermal protection | Junction overtemperature flag (TEF) triggers at 160 °C (typ), disabling outputs and asserting XERR |
| Single-resistor current scaling | One external RIREF sets identical max current for all 16 channels, simplifying BOM and layout |
| Cascadable serial interface | SOUT of one device connects directly to SIN of next, enabling multi-chip LED arrays with minimal MCU pins |
Applications
| Monocolor LED Signboard | Fullcolor LED Display |
|---|---|
Use Scenario: Outdoor alphanumeric signage using discrete red/green/blue LED modules arranged in rows/columns. IC Role / Device Role / Timing Role: TLC5924DAPR drives each color sub-pixel as a constant-current sink, synchronized via BLANK and XLAT for row-scanning. Use Value: Dot correction compensates for binning variance across thousands of LEDs; pre-charge FETs eliminate ghosting in high-speed multiplexed operation. | Use Scenario: Indoor video wall with RGB surface-mount LEDs at 10–20 mm pitch, requiring >120 Hz refresh and uniform grayscale. IC Role / Device Role / Timing Role: TLC5924DAPR serves as per-pixel current controller in column-driver architecture, with MODE-switched dot-correction updates between frames. Use Value: 7-bit per-channel adjustment enables precise gamma correction; LOD detection flags dead pixels during factory calibration. |
| LED Backlighting | Multicolor Architectural Lighting |
Use Scenario: Edge-lit LCD TV backlight using white LEDs in linear arrays, controlled for local dimming zones. IC Role / Device Role / Timing Role: TLC5924DAPR sinks current from series-connected LED strings, with BLANK modulated for PWM dimming. Use Value: 80 mA per channel supports high-brightness strings; thermal flag prevents overheating in enclosed bezels. | Use Scenario: Dynamic façade lighting with RGBW LED strips mounted on building exteriors, driven by DMX or proprietary protocols. IC Role / Device Role / Timing Role: TLC5924DAPR acts as distributed current controller per LED group, interfaced via microcontroller with SPI-to-serial bridge. Use Value: Cascaded SOUT→SIN topology minimizes wiring; LOD reporting enables remote fault diagnostics without physical inspection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940RHBR | 16-channel, 12-bit PWM + 6-bit dot correction; no pre-charge FET; requires external VREF | Better grayscale depth (4096 levels), but lacks LOD/TEF and pre-charge for fast-switching displays | Select TLC5940RHBR when higher PWM resolution is critical and thermal/LOD monitoring is handled externally. |
| IS31FL3731-QFLS4 | 18-channel, I²C interface, integrated auto-breathing, no pre-charge FET, max 40 mA/channel | Lower power, simpler interface, but insufficient current and missing pre-charge for high-brightness dynamic displays | Choose IS31FL3731-QFLS4 for compact, low-power indicator panels where 40 mA/channel suffices and I²C is preferred. |
Compared with TLC5924DAPR, TLC5940RHBR offers finer grayscale control but lacks integrated fault detection and pre-charge; IS31FL3731-QFLS4 provides ease of use via I²C yet trades off current capability and dynamic-display optimization.
Availability
TLC5924DAPR is available at Aetrix Electronics and suitable for monocolor signboards, fullcolor video walls, LED backlighting systems, and architectural lighting installations requiring stable component supply, long-term production continuity, and industrial-grade thermal reliability.
Supply support for TLC5924DAPR 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 logic solutions, with decades of expertise in precision power management and interface ICs.
The TLC5924 belongs to TI's high-performance LED driver product line, designed specifically for demanding dynamic-display applications requiring accurate current matching, real-time fault detection, and robust thermal management.
FAQ
What is the maximum continuous output current per channel for the TLC5924DAPR?
The TLC5924DAPR supports a maximum continuous sink current of 80 mA per channel (OUT0–OUT15) under recommended operating conditions (VCC = 3.0–5.5 V, TA = –40°C to 85°C, RIREF ≥ 600 Ω). This value is set by the external resistor on the IREF pin and remains stable across temperature and supply voltage variations within specification.
How does the TLC5924DAPR implement LED open detection (LOD)?
The TLC5924DAPR detects open LEDs when three conditions occur simultaneously: BLANK = low, the corresponding ON/OFF bit = 1, and the output voltage (OUTn) falls below 0.3 V (typical). Detected faults pull the open-drain XERR pin low and can also be read serially via SOUT after latching with XLAT.
Can the TLC5924DAPR be used in cascaded configurations, and how is data routed?
Yes - the TLC5924DAPR supports daisy-chaining: connect SOUT of one device to SIN of the next. Data is shifted MSB-first; the number of bits per device depends on MODE (16 for ON/OFF, 112 for dot correction). Cascading preserves timing integrity and enables large LED arrays with minimal MCU GPIO usage.
What is the role of the VUP pins on the TLC5924DAPR, and what voltage range is supported?
The TLC5924DAPR has two VUP pins (Pins 6 and 27) that supply the pre-charge power rail. VUP must be connected to a 3 V to 15 V source to enable the internal pre-charge FETs, which improve image quality in dynamic-drive LED displays by reducing turn-on delay and eliminating ghosting artifacts.
Does the TLC5924DAPR require external components for basic operation, and which ones are mandatory?
Yes - the TLC5924DAPR requires an external resistor between IREF and GND (≥600 Ω) to set output current, a pull-up resistor on XERR (typically 10 kΩ to VCC), and decoupling capacitors on VCC and VUP (e.g., 100 nF ceramic). The PowerPAD™ thermal pad must also be soldered to a PCB ground plane for thermal performance.
TLC5924DAPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm 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:
- 15V
- Current - Output / Channel:
- 80mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HTSSOP
TLC5924DAPR FAQ
1.How can I place an order for TLC5924DAPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5924DAPR 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 TLC5924DAPR reliable?
The price and inventory of TLC5924DAPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5924DAPR is usually 5 days.
3.What payment methods are accepted for TLC5924DAPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5924DAPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5924DAPR?
TLC5924DAPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5924DAPR 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 TLC5924DAPR?
For technical support, including TLC5924DAPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5924DAPR requirements.
6.How does Aetrix verify that TLC5924DAPR is sourced from the original manufacturer or authorized distributors?
All TLC5924DAPR 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 TLC5924DAPR meets industry standards.
7.What is the process for return or replacement of TLC5924DAPR?
All TLC5924DAPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5924DAPR, 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 TLC5924DAPR part is unused and in its original packaging.
Return procedure for TLC5924DAPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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