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Texas Instruments TLC5925IPWRG4
- Part No.:
- TLC5925IPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5925IPWRG4.pdf
- Description:
- IC LED DRVR LINEAR 45MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,909
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Product details
Overview
TLC5925IPWRG4 from Texas Instruments is a 16-channel constant-current LED sink driver IC used in LED display and lighting systems. It features serial-to-parallel data conversion via a 16-bit shift register, ±4% channel-to-channel current matching, 3–45 mA adjustable output current via external REXT, and 30 MHz clock support - enabling high-refresh-rate LED panels in gaming machines and signage.
For engineers reviewing the TLC5925IPWRG4 datasheet, TLC5925IPWRG4 pinout, TLC5925IPWRG4 application, or TLC5925IPWRG4 equivalent, key selection criteria include its 16-channel sink architecture, TSSOP-24 package with thermal performance suitable for industrial LED arrays, output voltage headroom up to 17 V, and integrated thermal shutdown protection.
Technical Context
The TLC5925IPWRG4 integrates a 16-bit serial-input shift register followed by parallel-output latches and 16 independent regulated-current sink drivers. Its output stage maintains constant current across wide forward-voltage (VF) variations of connected LEDs, with current set by a single external resistor (REXT) tied to the R-EXT pin.
Control logic includes Schmitt-trigger inputs (CLK, LE, OE, SDI), internal pull-up on OE and pull-down on LE, and cascading capability via SDO-to-SDI daisy-chaining. Propagation delays are as low as 15 ns (OE→OUT) at 5.5 V, supporting precise timing in high-speed LED scanning applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs for driving LEDs in parallel |
| Output current range | 3 mA to 45 mA, set externally via REXT; enables brightness tuning without PWM |
| Current accuracy | < ±4% max channel-to-channel mismatch ensures uniform LED intensity across displays |
| Max output voltage | 17 V allows direct drive of multi-LED strings (e.g., 5× white LEDs @ 3.2 V each) |
| Clock frequency | 30 MHz supports rapid serial loading - ~533 ns per bit, enabling full 16-bit update in < 540 ns |
| Supply voltage | 3.0 V to 5.5 V compatible with both 3.3 V microcontrollers and legacy 5 V systems |
| Thermal shutdown | Activates at 150–200 °C junction temperature, protecting against overcurrent or poor heatsinking |
Pinout & Package
TLC5925IPWRG4 uses a 24-pin TSSOP package (7.80 mm × 4.40 mm body size) with exposed thermal pad; pin pitch is 0.65 mm. The package supports JEDEC Level-1 moisture sensitivity and 260 °C peak reflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for control logic and all 16 output currents; requires low-impedance PCB connection |
| SDI (Pin 2) | Serial data input | Accepts 3.3/5 V logic-level data; feeds shift register on CLK rising edge |
| CLK (Pin 3) | Clock input | Rising-edge triggered; 30 MHz max rate; Schmitt-triggered for noise immunity |
| LE (Pin 4) | Latch enable | Transfers shift register contents to output latches when falling; internal pulldown |
| OUT0–OUT15 (Pins 5–12, 13–20) | Constant-current sinks | Each delivers user-set current to cathode of LED; open-drain structure with 17 V max VDS |
| R-EXT (Pin 23) | Current-setting input | Connects external resistor to GND; sets all 16 outputs identically via IOUT = 1.21 V / REXT × 18 |
| SDO (Pin 22) | Serial data output | Shifts out MSB of register; enables daisy-chaining multiple TLC5925IPWRG4 devices |
| OE (Pin 21) | Output enable | Active-low global blanking; internal pullup; enables fast PWM dimming at system level |
| VDD (Pin 24) | Power supply | 3.0–5.5 V digital and analog supply; bypass capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Eliminates need for individual current-limiting resistors; reduces BOM count and board area in LED matrix designs |
| External REXT-based current setting | Enables precise, temperature-stable current calibration across production batches using one precision resistor |
| 30 MHz serial interface | Supports >18 kHz frame rates for 16×16 LED arrays without visible flicker or ghosting |
| Schmitt-trigger inputs | Rejects noise on CLK, LE, OE, and SDI lines - critical in electrically noisy environments like gaming cabinets |
| Thermal shutdown with hysteresis | Shuts down at ≥175 °C (typical) and restarts at ≥160 °C, preventing latch-up during transient overloads |
Applications
| LED Display Panels | Gaming Machine Displays |
|---|---|
|
Use Scenario: Driving 16×16 red/green/blue LED dot-matrix modules in outdoor signage. IC Role / Device Role / Timing Role: Sink driver providing uniform current to each LED column while row scanning is handled by external multiplexers. Use Value: ±4% channel matching ensures consistent brightness across entire display; 17 V output headroom supports 5-LED series strings. |
Use Scenario: Illuminating animated reels and bonus indicators in casino slot machines. IC Role / Device Role / Timing Role: Constant-current sink controlling LED backlighting and status indicators synchronized to game state transitions. Use Value: Fast 100 ns OE response enables precise strobing for motion blur reduction; 30 MHz clock allows real-time animation updates. |
| Architectural LED Lighting | White Goods UI Panels |
|
Use Scenario: Linear LED strips for under-cabinet and accent lighting in commercial interiors. IC Role / Device Role / Timing Role: Current-regulated sink for distributed LED loads, interfaced via microcontroller SPI bus. Use Value: Adjustable 3–45 mA output accommodates diverse LED VF and luminous flux requirements without redesign. |
Use Scenario: Backlighting segmented LCDs and status LEDs on refrigerator control panels. IC Role / Device Role / Timing Role: Low-power LED driver operating from 3.3 V MCU rail with minimal quiescent current (9–12 mA). Use Value: Integrated thermal shutdown protects against enclosure overheating; ESD-rated (1 kV HBM) withstands handling in assembly lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940IPWP | 16-channel, but adds dot-correction (6-bit per channel) and grayscale PWM (12-bit); requires external VREF and more complex timing | Better suited for high-fidelity grayscale displays; not drop-in due to different register map and control protocol | Select TLC5925IPWRG4 when only uniform current control is needed and cost/simplicity are priorities |
| STP16CP05PTR | 16-channel sink with similar REXT current setting, but lower max output voltage (13 V) and no thermal shutdown | Used in consumer electronics where ambient temperature is controlled; lacks protection for industrial signage | Choose TLC5925IPWRG4 for applications requiring 17 V headroom or thermal safety in unventilated enclosures |
Compared with TLC5940IPWP and STP16CP05PTR, the TLC5925IPWRG4 offers the best balance of simplicity, robustness (17 V, thermal shutdown), and compatibility with standard SPI-like interfaces - making it ideal for cost-sensitive, high-reliability LED display systems.
Availability
TLC5925IPWRG4 is available at Aetrix Electronics and suitable for LED display panels, gaming machine illumination, and architectural lighting applications requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for TLC5925IPWRG4 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 ICs, with decades of leadership in LED driver innovation.
The TLC5925IPWRG4 belongs to TI's constant-current LED driver product line, designed specifically for high-channel-count, low-cost LED display and signage applications where uniform brightness and thermal resilience are critical.
FAQ
What is the maximum output voltage rating for the TLC5925IPWRG4?
The TLC5925IPWRG4 supports a maximum output voltage of 17 V across its OUT0–OUT15 pins. This allows driving longer LED strings - for example, five 3.2 V white LEDs in series - without additional voltage boosting circuitry. The rating applies under recommended operating conditions and is validated per TI's absolute maximum specifications.
How is output current set on the TLC5925IPWRG4?
Output current on the TLC5925IPWRG4 is set by an external resistor (REXT) connected between the R-EXT pin (Pin 23) and GND. The relationship is IOUT = (1.21 V / REXT) × 18, yielding 13 mA at 1680 Ω and 26 mA at 840 Ω. This single-resistor method ensures matched current across all 16 channels of the TLC5925IPWRG4.
Does the TLC5925IPWRG4 support daisy-chaining with other devices?
Yes, the TLC5925IPWRG4 supports daisy-chaining via its SDO (Pin 22) and SDI (Pin 2) pins. Serial data shifted into the first device exits SDO and feeds SDI of the next, allowing cascaded configuration of multiple TLC5925IPWRG4 units without additional controller I/O. Clock and latch signals remain shared across the chain.
What package type does the TLC5925IPWRG4 use, and what are its thermal characteristics?
The TLC5925IPWRG4 uses a 24-pin TSSOP (PW) package measuring 7.80 mm × 4.40 mm. Its thermal resistance is RθJA = 87.9 °C/W on a JEDEC 4-layer board, and it includes an exposed thermal pad for enhanced heat dissipation. The device also integrates thermal shutdown that activates between 150 °C and 200 °C junction temperature.
Is the TLC5925IPWRG4 compatible with 3.3 V microcontrollers?
Yes, the TLC5925IPWRG4 operates with a supply voltage range of 3.0 V to 5.5 V and features Schmitt-trigger inputs that accept 3.3 V logic levels directly. Its VIH threshold is 0.7 × VDD, so at 3.3 V VDD, a minimum of 2.31 V is recognized as high - well within typical 3.3 V MCU output swing. No level-shifting is required when interfacing with 3.3 V controllers.
TLC5925IPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 45mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
TLC5925IPWRG4 FAQ
1.How can I place an order for TLC5925IPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5925IPWRG4 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 TLC5925IPWRG4 reliable?
The price and inventory of TLC5925IPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5925IPWRG4 is usually 5 days.
3.What payment methods are accepted for TLC5925IPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5925IPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5925IPWRG4?
TLC5925IPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5925IPWRG4 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 TLC5925IPWRG4?
For technical support, including TLC5925IPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5925IPWRG4 requirements.
6.How does Aetrix verify that TLC5925IPWRG4 is sourced from the original manufacturer or authorized distributors?
All TLC5925IPWRG4 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 TLC5925IPWRG4 meets industry standards.
7.What is the process for return or replacement of TLC5925IPWRG4?
All TLC5925IPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5925IPWRG4, 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 TLC5925IPWRG4 part is unused and in its original packaging.
Return procedure for TLC5925IPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5925IPWRG4 Tags
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