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Texas Instruments TLC5922DAPRG4
- Part No.:
- TLC5922DAPRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TLC5922DAPRG4.pdf
- Description:
- IC LED DRVR LINEAR 80MA 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,531
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Product details
Overview
TLC5922DAPRG4 from Texas Instruments is a 16-channel constant-current LED sink driver with 7-bit dot-correction (128-step brightness control per channel), ±1% typical current accuracy, and 0–80 mA per output. It operates from 3.0 V to 5.5 V supply and supports LED supply voltages up to 17 V, enabling use in high-brightness LED signage and display backlighting systems.
For engineers reviewing the TLC5922DAPRG4 datasheet, TLC5922DAPRG4 pinout, TLC5922DAPRG4 application, or TLC5922DAPRG4 equivalent, key selection considerations include its SPI-compatible serial interface, 30 MHz clock rate, programmable output delay staging, thermal PowerPAD™ HTSSOP package, and dual-mode operation (On/Off vs. dot-correction data loading).
Technical Context
The TLC5922DAPRG4 implements two independent 16-bit shift-register paths-On/Off mode (16-bit) and dot-correction mode (112-bit)-selected by the MODE pin. Each output features a dedicated constant-current sink with internal graduated delay (20 ns step between adjacent channels) to suppress inrush current.
Current regulation relies on a single external RIREF resistor tied to the IREF pin, where VIREF = 1.24 V (typical) sets maximum channel current as IOUT = 40 × (VIREF/RIREF). BLANK provides synchronous global output disable, while XLAT latches serial data into either register set on rising edge.
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) |
| Dot-Correction Resolution | 7-bit (128 steps), individually adjustable per channel for brightness uniformity |
| Serial Interface | SPI-compatible, 30 MHz max SCLK, MSB-first, cascading supported via SOUT→SIN |
| Supply Range | VCC = 3.0 V to 5.5 V; LED supply up to 17 V at OUTx pins |
| Output Switching Speed | Tr/Tf = 10 ns (typical) at VCC = 5 V, TA = 60°C |
| Operating Temperature | –20°C to +85°C free-air range |
Pinout & Package
Package: 32-pin HTSSOP (PowerPAD™) with exposed thermal die pad; 8.1 mm × 11.0 mm footprint, 0.65 mm pitch, 1.2 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Analog/digital ground return for logic and bias circuitry |
| BLANK (Pin 2) | Global output enable | High forces all 16 outputs OFF regardless of register state; low enables normal operation |
| 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; determines max data rate (≤30 MHz) |
| SIN (Pin 5) | Serial data input | MSB-first input for On/Off (16-bit) or dot-correction (112-bit) data packets |
| PGND (Pins 6, 14, 19, 24, 27) | Power ground | Dedicated low-impedance return path for output current sinks to minimize noise coupling |
| 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 external LEDs; staged 20 ns delay between adjacent outputs |
| VCC (Pin 32) | Logic supply | Powers internal logic, shift registers, and control circuitry (3.0–5.5 V) |
| IREF (Pin 31) | Reference current setting | Connects to external resistor to set full-scale output current (IOUT = 40 × VIREF/RIREF, VIREF = 1.24 V) |
| MODE (Pin 30) | Function mode select | Low = On/Off register access; High = dot-correction register access; configures shift register width |
| SOUT (Pin 28) | Serial data output | Provides daisy-chain capability: output mirrors SIN after 112 or 16 clocks depending on MODE |
| NC (Pin 29) | No connect | Not internally bonded; must be left floating or grounded per layout best practice |
Key Features
| Feature | Design Value |
|---|---|
| Controlled in-rush current | Graduated 20 ns output turn-on delay per channel reduces peak supply current and eases bypass capacitor sizing |
| ±1% typical current accuracy | Ensures consistent LED brightness across channels and units without per-channel trimming |
| 32-pin HTSSOP with PowerPAD™ | Exposed thermal pad enables efficient heat dissipation for sustained 80 mA/channel operation |
| Dual-mode serial interface | Single MODE pin selects between fast 16-bit On/Off updates or precise 112-bit dot-correction programming |
| CMOS-level I/O compatibility | Supports direct interfacing with 3.3 V or 5 V microcontrollers without level-shifting circuitry |
Applications
| LED Signboard Control | Full-Color Display Backlight |
|---|---|
Use Scenario: Outdoor alphanumeric LED signboards requiring uniform brightness across hundreds of red/green/blue segments under varying ambient temperatures. IC Role / Device Role / Timing Role: Constant-current sink driver managing 16 LED strings per TLC5922DAPRG4; dot-correction compensates for LED binning and aging drift. Use Value: ±1% current matching ensures consistent color point and luminance across modules; BLANK enables synchronized PWM dimming at system level. | Use Scenario: Edge-lit LCD backlight for industrial HMIs where local dimming zones require independent current control per LED string. IC Role / Device Role / Timing Role: 16-channel current sink providing programmable per-zone intensity; cascaded devices support >100 zones via daisy-chained SOUT→SIN. Use Value: 7-bit dot-correction allows fine-grained calibration against optical sensor feedback; 30 MHz interface enables rapid zone update rates (>1 kHz). |
| Monocolor Display Module | Multicolor Architectural Lighting |
Use Scenario: Indoor dot-matrix displays using high-efficiency white LEDs, where thermal derating must be managed across dense PCB layouts. IC Role / Device Role / Timing Role: Primary current driver with PowerPAD™ thermal pad soldered to inner ground plane; XLAT-synchronized updates prevent visual artifacts during animation. Use Value: Exposed thermal pad lowers junction-to-board thermal resistance (θJB), sustaining 80 mA/channel at 85°C ambient without forced air cooling. | Use Scenario: RGBW linear lighting strips for commercial interiors, requiring per-channel current tuning to maintain CCT and CRI across long runs. IC Role / Device Role / Timing Role: Channel-specific current sink enabling independent R/G/B/W drive; MODE pin toggles between global on/off and per-LED brightness correction. Use Value: Single RIREF resistor sets baseline current; 128-step dot-correction corrects for forward voltage spread and thermal droop across 16 LEDs per IC. |
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; integrated grayscale counter; requires external VREF for current setting | Superior grayscale depth (4096 steps) but higher pin count and no native 7-bit dot-correction register | Choose TLC5940RHBR when high-fidelity PWM dimming is required over simple DC current control |
| IS31FL3728-QFLS4-TR | 18-channel, I²C interface, auto-breathing mode, built-in temperature compensation, 8-bit current resolution | Lower max current (45 mA), no cascading support, software-configurable timing modes | Choose IS31FL3728-QFLS4-TR for space-constrained designs needing I²C simplicity and thermal robustness over raw current precision |
Compared with TLC5922DAPRG4, TLC5940RHBR offers deeper grayscale control but lacks its simple 7-bit dot-correction register architecture and requires more complex timing management; IS31FL3728-QFLS4-TR simplifies system integration with I²C but trades off current accuracy (±5%) and peak drive capability for embedded intelligence and smaller footprint.
Availability
TLC5922DAPRG4 is available at Aetrix Electronics and suitable for LED signboard control, full-color display backlighting, monocolor display modules, and multicolor architectural lighting requiring stable component supply and long-term production continuity.
Supply support for TLC5922DAPRG4 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 solutions with broad industrial and automotive portfolio coverage.
The TLC5922 product line delivers high-accuracy, thermally robust constant-current LED drivers optimized for signage, display, and general-purpose lighting applications demanding brightness uniformity and long-term stability.
FAQ
What is the maximum LED supply voltage supported by the TLC5922DAPRG4?
The TLC5922DAPRG4 supports LED supply voltages up to 17 V applied to its OUT0–OUT15 pins. This allows direct connection to common 12 V or 15 V LED bus architectures without external voltage translation, provided the voltage difference between VCC and the LED supply remains within absolute maximum ratings.
How does the MODE pin affect serial data loading in the TLC5922DAPRG4?
The MODE pin selects the active register path in the TLC5922DAPRG4: when MODE = LOW, the 16-bit On/Off register is enabled and SIN accepts 16-bit data; when MODE = HIGH, the 112-bit dot-correction register is selected and SIN accepts 112-bit data. XLAT rising edge latches the loaded data into the respective register.
Can multiple TLC5922DAPRG4 devices be cascaded, and how is data routed?
Yes, multiple TLC5922DAPRG4 devices can be cascaded by connecting the SOUT pin of one device to the SIN pin of the next. Serial data propagates through the chain with each device consuming its assigned bit segment-16 bits for On/Off mode or 112 bits for dot-correction mode-enabling scalable channel expansion without additional controller pins.
What is the purpose of the graduated delay between TLC5922DAPRG4 outputs?
The TLC5922DAPRG4 applies a fixed 20 ns delay increment between successive outputs (e.g., OUT0 = 0 ns, OUT1 = 20 ns, OUT2 = 40 ns). This staged turn-on reduces simultaneous switching current spikes, minimizing supply rail disturbance and easing requirements for bulk and high-frequency decoupling capacitors.
How is output current calibrated on the TLC5922DAPRG4?
Output current on the TLC5922DAPRG4 is calibrated using a single external resistor RIREF connected between IREF (Pin 31) and GND. With VIREF = 1.24 V (typical), full-scale current per channel equals 40 × (1.24 V / RIREF). For 80 mA max, RIREF = 620 Ω (standard value); minimum RIREF is 600 Ω per datasheet.
TLC5922DAPRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TLC5922DAPRG4 FAQ
1.How can I place an order for TLC5922DAPRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5922DAPRG4 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 TLC5922DAPRG4 reliable?
The price and inventory of TLC5922DAPRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5922DAPRG4 is usually 5 days.
3.What payment methods are accepted for TLC5922DAPRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5922DAPRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5922DAPRG4?
TLC5922DAPRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5922DAPRG4 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 TLC5922DAPRG4?
For technical support, including TLC5922DAPRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5922DAPRG4 requirements.
6.How does Aetrix verify that TLC5922DAPRG4 is sourced from the original manufacturer or authorized distributors?
All TLC5922DAPRG4 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 TLC5922DAPRG4 meets industry standards.
7.What is the process for return or replacement of TLC5922DAPRG4?
All TLC5922DAPRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5922DAPRG4, 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 TLC5922DAPRG4 part is unused and in its original packaging.
Return procedure for TLC5922DAPRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5922DAPRG4 Tags
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