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Texas Instruments TLC5922DAP
- Part No.:
- TLC5922DAP
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TLC5922DAP.pdf
- Description:
- IC LED DRVR LINEAR 80MA 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,265
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Product details
Overview
TLC5922DAP from Texas Instruments is a 16-channel constant-current LED sink driver with individually programmable 7-bit dot-correction (128 steps) and global on/off control, supporting up to 80 mA per channel, 30 MHz SPI-compatible serial interface, and LED supply voltage up to 17 V - deployed in full-color LED displays and signage requiring precise brightness uniformity.
For engineers reviewing the TLC5922DAP datasheet, TLC5922DAP pinout, TLC5922DAP application, or TLC5922DAP equivalent, key selection criteria include its 32-pin HTSSOP PowerPAD™ package, 128-step per-channel current adjustment, ±1% typical current accuracy, graduated 20-ns output delay staging, and dual-mode serial interface (16-bit On/Off vs. 112-bit dot-correction).
Technical Context
The TLC5922DAP implements two independent 16-bit shift-register paths selected by the MODE pin: low for 16-bit On/Off latching, high for 112-bit (16 × 7-bit) dot-correction data loading. Each output features a dedicated constant-current sink with external IREF resistor setting maximum current (IMAX = 40 × VIREF / RIREF, VIREF ≈ 1.24 V).
Output staging introduces fixed 20-ns delays between adjacent channels (OUT0 to OUT15), reducing inrush current transients and easing PCB bypass capacitor requirements. BLANK provides synchronous global disable independent of register state, while XLAT rising edge latches serial data into respective registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 16 independent constant-current sink outputs |
| Max output current | 80 mA per channel (set via external RIREF, min 600 Ω) |
| Dot-correction resolution | 7-bit per channel (128 linear steps, 0–100% of IMAX) |
| Serial interface speed | 30 MHz clock rate; MSB-first, SPI-compatible protocol |
| Supply voltage range | VCC = 3.0 V to 5.5 V; LED supply up to 17 V at outputs |
| Operating temperature | –20°C to +85°C free-air range |
| Output switching speed | 10 ns rise/fall time (typical, VCC = 5 V) |
Pinout & Package
Package: 32-pin HTSSOP (DAP) with exposed thermal PowerPAD™ die pad - requires soldering to PCB copper for thermal management and electrical grounding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Analog/digital ground return for internal logic and bias circuits |
| BLANK (Pin 2) | Global output enable | High forces all 16 outputs OFF regardless of register state; asynchronous override |
| XLAT (Pin 3) | Data latch control | Rising edge transfers serial data from shift register to output register (On/Off or dot-correction) |
| SCLK (Pin 4) | Serial clock input | Drives internal shift register on rising edge; MODE-selects 16- or 112-bit width |
| SIN (Pin 5) | Serial data input | MSB-first data stream for On/Off or dot-correction registers |
| PGND (Pins 6, 14, 19, 24, 27) | Power ground | Dedicated low-impedance return path for output current sinks |
| OUT0–OUT15 (Pins 7–8, 10–13, 15–16, 17–18, 20–23, 25–26) | Constant-current sink outputs | Each delivers programmable DC current (0–80 mA) to LED cathodes |
| VCC (Pin 32) | Logic supply | Powers internal logic, shift registers, and interface circuitry (3.0–5.5 V) |
| IREF (Pin 31) | Reference current input | Connects external resistor to GND to set max channel current (IOUT = 40 × 1.24 V / RIREF) |
| MODE (Pin 30) | Interface mode select | Low = 16-bit On/Off register; High = 112-bit dot-correction register |
| SOUT (Pin 28) | Serial data output | Enables daisy-chaining multiple TLC5922DAP devices |
| NC (Pin 29) | No connect | Not internally bonded; must be left unconnected |
Key Features
| Feature | Design Value |
|---|---|
| Controlled in-rush current | Graduated 20-ns inter-output delay staging minimizes simultaneous turn-on current spikes |
| Per-channel brightness correction | 7-bit dot-correction (128 steps) compensates for LED binning, aging, and board-level current variation |
| High-accuracy current regulation | ±1% typical channel-to-channel current matching enables uniform LED luminance |
| Thermally enhanced packaging | HTSSOP PowerPAD™ exposes die pad for direct PCB thermal coupling - improves power handling at 85°C ambient |
| Robust serial interface | 30 MHz clock tolerance and CMOS-level I/O simplify microcontroller integration without level-shifting |
Applications
| Monocolor LED Signboard | Full-Color LED Display |
|---|---|
Use Scenario: Outdoor alphanumeric signage using discrete red/green/blue LEDs per pixel, requiring long-term brightness consistency across thousands of nodes. IC Role / Device Role / Timing Role: Constant-current sink driver managing 16 LED segments per IC; dot-correction registers calibrated during factory setup to compensate for LED forward-voltage drift. Use Value: Eliminates manual resistor trimming and enables software-based luminance rebalancing over product lifetime without hardware change. |
Use Scenario: Indoor video wall with RGB surface-mount LEDs, where color fidelity depends on precise per-primary current matching across display tiles. IC Role / Device Role / Timing Role: Pixel-level current controller; each TLC5922DAP drives 16 subpixels (e.g., 5 red + 5 green + 6 blue), synchronized via shared XLAT and BLANK signals. Use Value: ±1% current accuracy ensures ΔE < 3 color deviation across panels; 30 MHz interface supports >120 Hz refresh without frame tearing. |
| Display Backlighting | Multicolor LED Lighting |
Use Scenario: Edge-lit LCD backlight using high-brightness white LEDs arranged in 16-zone arrays for local dimming in commercial monitors. IC Role / Device Role / Timing Role: Zone-level current regulator; BLANK signal modulated at PWM frequencies >200 Hz to avoid audible noise while maintaining flicker-free dimming. Use Value: 80 mA per channel supports high-lumen LEDs; staged output delays prevent 16× peak current surges during zone activation. |
Use Scenario: Architectural accent lighting with tunable-white or RGBW LED strings, where smooth dimming and color mixing require stable per-channel current control. IC Role / Device Role / Timing Role: Constant-current node controller; cascaded SOUT→SIN connections enable single-controller management of >100 LEDs with minimal GPIO usage. Use Value: 112-bit dot-correction allows per-LED calibration against thermal derating curves, preserving CCT accuracy over 0–85°C ambient range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940PWPR | 16-channel, 12-bit PWM + 6-bit dot-correction; integrated grayscale counter; no BLANK pin - uses GSCLK for global blanking | Requires external PWM timing source; better suited for high-resolution grayscale animation than static brightness correction | Select when needing >4096 grayscale levels per channel and hardware auto-refresh; not drop-in for TLC5922DAP's simple serial latch architecture |
| IS31FL3731-QFLS4-TR | 16×16 matrix driver (256 channels); I²C interface; built-in breathing effects; max 40 mA/channel | Designed for grid-based LED layouts; lacks individual dot-correction per sink - uses global current scaling + PWM | Choose for space-constrained designs needing dense LED arrays without external row/column drivers; lower per-channel current limits suitability for high-brightness signage |
Compared with TLC5922DAP, TLC5940PWPR offers higher grayscale depth but demands more complex timing coordination, while IS31FL3731-QFLS4-TR reduces component count in matrix topologies but sacrifices per-channel analog current tuning precision and maximum drive strength.
Availability
TLC5922DAP is available at Aetrix Electronics and suitable for LED signage, display backlighting, and multicolor lighting applications requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for TLC5922DAP 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 U.S.-based semiconductor company specializing in analog, embedded processing, and power management technologies with broad industrial and automotive qualification coverage.
The TLC5922DAP belongs to TI's LED driver portfolio designed specifically for high-precision, high-channel-count constant-current LED control in commercial signage and professional display systems.
FAQ
What is the maximum LED supply voltage supported by the TLC5922DAP?
The TLC5922DAP supports an LED supply voltage up to 17 V applied to its OUT0–OUT15 pins. This rating is independent of the 3.0–5.5 V VCC logic supply, enabling direct connection to common 12 V or 15 V LED bus architectures without level-shifting circuitry. The device maintains 80 mA sink capability across this full output voltage range.
How does the TLC5922DAP achieve ±1% constant-current accuracy?
The TLC5922DAP achieves ±1% typical channel-to-channel current accuracy through matched internal current mirror architecture and bandgap-referenced IREF voltage (1.24 V ±0.04 V). Accuracy holds across temperature (–20°C to 85°C) and supply voltage (3.0–5.5 V), verified under standardized test conditions with RIREF ≥ 600 Ω and VOUT = 1 V.
Can the TLC5922DAP be used in daisy-chained configurations?
Yes, the TLC5922DAP supports daisy-chaining via its SOUT pin, which outputs shifted data after internal register transfer. Connecting SOUT of one device to SIN of the next enables serial programming of multiple ICs using only three control lines (SCLK, XLAT, BLANK). Cascaded latency scales linearly with device count - e.g., two devices require 224 bits (112 × 2) for full dot-correction load.
What is the purpose of the graduated output delay in the TLC5922DAP?
The TLC5922DAP incorporates fixed 20-ns inter-output delays (OUT0: 0 ns, OUT1: 20 ns, ..., OUT15: 300 ns) to stagger channel turn-on events. This staging reduces peak inrush current by limiting simultaneous switching, lowering required bulk capacitance on the LED supply rail and minimizing conducted EMI during high-speed updates.
Is the PowerPAD™ thermal pad on the TLC5922DAP electrically connected internally?
Yes, the exposed thermal die pad on the TLC5922DAP is internally connected to PGND (power ground) pins. It must be soldered to a PCB copper pour tied to the system power ground plane to ensure both thermal dissipation and proper electrical reference for the output current sinks. Thermal vias beneath the pad improve heat transfer to inner layers.
TLC5922DAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Linear
- Topology:
- -
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 80mA
- Frequency:
- -
- Dimming:
- -
- Applications:
- Backlight, Lighting, Signage
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HTSSOP
TLC5922DAP FAQ
1.How can I place an order for TLC5922DAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5922DAP 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 TLC5922DAP reliable?
The price and inventory of TLC5922DAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5922DAP is usually 5 days.
3.What payment methods are accepted for TLC5922DAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5922DAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5922DAP?
TLC5922DAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5922DAP 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 TLC5922DAP?
For technical support, including TLC5922DAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5922DAP requirements.
6.How does Aetrix verify that TLC5922DAP is sourced from the original manufacturer or authorized distributors?
All TLC5922DAP 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 TLC5922DAP meets industry standards.
7.What is the process for return or replacement of TLC5922DAP?
All TLC5922DAP units undergo pre-shipment inspection (PSI). If there is an issue with TLC5922DAP, 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 TLC5922DAP part is unused and in its original packaging.
Return procedure for TLC5922DAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5922DAP Tags
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BCR402RE6327HTSA1
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BCR430UXTSA2
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BCR420UE6433HTMA1
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BCR420UE6327HTSA1
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BCR421UE6327HTSA1
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LYT1604D-TL
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HV9910CLG-G
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CL2N8-G
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BCR420UW6-7
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BCR421UW6-7
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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