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Texas Instruments TLC5925IPWR
- Part No.:
- TLC5925IPWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5925IPWR.pdf
- Description:
- IC LED DRVR LINEAR 45MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:10,288
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Product details
Overview
TLC5925IPWR from Texas Instruments is a 16-channel constant-current LED sink driver IC designed for LED display and lighting systems. It delivers precise, load-voltage-invariant output current (3–45 mA per channel), features 30-MHz serial clock support, Schmitt-trigger inputs, and thermal shutdown protection. It operates from 3.3 V to 5.5 V supply and drives LEDs up to 17 V output voltage - ideal for high-density LED signage and panel backlighting.
For engineers reviewing the TLC5925IPWR datasheet, TLC5925IPWR pinout, TLC5925IPWR application, or TLC5925IPWR equivalent, key selection considerations include its 16-channel sink architecture, external REXT-based current programming, fast 100 ns OE response, ±4% channel-to-channel current matching, and TSSOP-24 package compatibility with space-constrained LED driver layouts.
Technical Context
The TLC5925IPWR integrates a 16-bit serial-in/parallel-out shift register with independent output latches, enabling cascaded daisy-chain configuration via SDI/SDO. Its output stage uses regulated current sinks with internal reference and feedback, maintaining accuracy across VF variations and temperature (–40°C to +125°C).
Control logic accepts CMOS-level inputs (CLK, LE, OE, SDI) with internal pull-up (OE) and pull-down (LE) resistors. Output enable (OE) provides blanking with <100 ns turn-off delay, while LE latches shifted data into output registers on falling edge - supporting precise PWM dimming synchronization in multi-device arrays.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 independent constant-current sink outputs |
| Output current range | 3 mA to 45 mA per channel, set by external REXT |
| Current accuracy | ±4% max channel-to-channel mismatch at 25°C |
| Supply voltage | 3.0 V to 5.5 V - compatible with both 3.3 V and 5 V logic systems |
| Max output voltage | 17 V - supports high-VF LED strings and common-anode configurations |
| Serial clock frequency | Up to 30 MHz - enables rapid refresh of large LED matrices |
| Thermal shutdown | Activates at 150–200°C junction temperature with 15°C hysteresis |
Pinout & Package
TLC5925IPWR is housed in a 24-pin TSSOP package (7.80 mm × 4.40 mm body size, 0.65 mm pitch), optimized for automated assembly and thermal performance on 4-layer PCBs (RθJA = 87.9°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return path for 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; Schmitt-trigger input ensures noise immunity |
| CLK (Pin 3) | Shift clock input | Rising-edge triggered; supports up to 30 MHz for high-speed data loading |
| LE (Pin 4) | Latch enable | Falling-edge latches 16-bit data from shift register to output latches; internal 500 kΩ pulldown |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each drives one LED cathode; rated for 45 mA continuous, 17 V max output swing |
| R-EXT (Pin 23) | Current-setting reference | Connects external resistor to GND to program IOUT = (1.21 V / REXT) × 18 |
| SDO (Pin 22) | Serial data output | Shifts out MSB of previous data word - enables daisy-chaining multiple TLC5925IPWR devices |
| OE (Pin 21) | Output enable | Active-low global blanking; internal 500 kΩ pullup; <100 ns response enables precise PWM dimming |
| VDD (Pin 24) | Power supply | 3.0–5.5 V input; powers logic and output regulators - bypass with 0.1 µF ceramic near pin |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Enables uniform brightness across multi-LED arrays without individual current-limiting resistors |
| External REXT current programming | Allows precise, board-level tuning of LED intensity (e.g., 13 mA @ 1680 Ω, 26 mA @ 840 Ω) |
| Daisy-chainable serial interface | SDI/SDO pins support unlimited cascading - reduces MCU GPIO count and simplifies layout |
| Thermal shutdown with hysteresis | Protects against overtemperature failure in enclosed LED enclosures or high ambient conditions |
| ESD robustness | 1-kV HBM rating ensures reliability during handling and PCB assembly |
Applications
| LED Signage Panels | Gaming Machine Displays |
|---|---|
Use Scenario: Outdoor and indoor full-color LED video walls using RGB SMD LEDs in 16×N matrix configurations. IC Role / Device Role / Timing Role: Constant-current sink driver controlling LED cathodes; synchronized blanking via OE enables high-refresh-rate PWM dimming. Use Value: ±4% channel matching ensures consistent color balance and eliminates visible banding across panels. |
Use Scenario: Animated front-panel displays and reel illumination in slot machines and arcade cabinets. IC Role / Device Role / Timing Role: Serially controlled LED driver managing dynamic lighting effects; LE and OE support frame-synchronized strobing. Use Value: 30-MHz clock and <100 ns OE response allow rapid pattern updates for responsive game feedback lighting. |
| White Goods Indicator Lighting | Industrial Control Panel Backlighting |
Use Scenario: Status indicators and segmented displays on refrigerators, dishwashers, and washing machines. IC Role / Device Role / Timing Role: Low-power LED driver operating from 3.3 V microcontroller rails; REXT sets safe current for long-life indicator LEDs. Use Value: Thermal shutdown and wide operating temperature (–40°C to +125°C) ensure reliability inside appliance enclosures. |
Use Scenario: Backlighting for membrane switches and segmented LCDs in factory HMIs and PLC interfaces. IC Role / Device Role / Timing Role: Current-regulated sink driving parallel LED strings; daisy-chained configuration minimizes wiring complexity. Use Value: 17 V output capability supports higher-VF white LEDs while maintaining tight current regulation across supply variation. |
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 includes dot-correction (6-bit per channel) and grayscale PWM (12-bit); requires external VREF and more complex timing | Better suited for high-fidelity grayscale LED displays; not drop-in compatible due to different register map and control protocol | Select when per-channel grayscale correction is required; avoid if only basic constant-current drive is needed |
| STP16CP05PTR | 16-channel sink driver with similar REXT current setting, but lower max output voltage (13 V) and no thermal shutdown | Targeted at cost-sensitive consumer lighting; lacks OE blanking speed (<100 ns) and channel accuracy (±6% typ) | Consider for non-critical indoor applications where 17 V headroom and precision dimming are not required |
Compared with TLC5925IPWR, TLC5940IPWP adds grayscale control at the cost of design complexity and power overhead, while STP16CP05PTR offers lower cost but sacrifices output voltage margin, thermal safety, and current matching - making TLC5925IPWR optimal for industrial-grade LED signage requiring reliability, precision, and ease of integration.
Availability
TLC5925IPWR is available at Aetrix Electronics and suitable for LED signage panels, gaming machine displays, and industrial control panel backlighting requiring stable component supply across extended production lifecycles.
Supply support for TLC5925IPWR 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 connectivity technologies, with decades of experience in LED driver innovation and automotive-grade reliability validation.
The TLC5925IPWR belongs to TI's LED driver product line, engineered specifically for high-channel-count, constant-current LED display and lighting applications demanding precision, thermal resilience, and serial scalability.
FAQ
What is the maximum output voltage supported by the TLC5925IPWR?
The TLC5925IPWR supports a maximum output voltage of 17 V at its OUT0–OUT15 pins. This allows direct driving of high-forward-voltage LED strings (e.g., 4–5 white LEDs in series) without external boost circuitry, and ensures compatibility with common-anode LED panel architectures where the anodes are tied to a higher rail.
How is output current programmed on the TLC5925IPWR?
Output current on the TLC5925IPWR is set by an external resistor (REXT) connected between Pin 23 (R-EXT) and GND. The relationship is IOUT = (1.21 V / REXT) × 18 - yielding, for example, ~13 mA at 1680 Ω and ~26 mA at 840 Ω. This single-resistor method simplifies BOM and enables board-level calibration of LED brightness.
Does the TLC5925IPWR support daisy-chaining with other TLC5925IPWR devices?
Yes, the TLC5925IPWR supports seamless daisy-chaining via its SDI (serial data in) and SDO (serial data out) pins. Data shifted into the first device propagates through subsequent devices, allowing control of dozens of LED channels using only four MCU pins (CLK, LE, OE, SDI). The SDO output is registered and timed to meet setup/hold requirements for cascaded operation.
What is the purpose of the OE (Output Enable) pin on the TLC5925IPWR?
The OE pin on the TLC5925IPWR is an active-low global blanking control that disables all 16 output drivers simultaneously. With a guaranteed response time of ≤100 ns, it enables precise PWM dimming synchronization across multiple TLC5925IPWR devices - critical for flicker-free operation in high-refresh-rate LED displays and video walls.
What package type is used for the TLC5925IPWR, and what are its thermal characteristics?
The TLC5925IPWR uses a 24-pin TSSOP (PW) package measuring 7.80 mm × 4.40 mm. On a JEDEC 4-layer board with no airflow, its junction-to-ambient thermal resistance (RθJA) is 87.9°C/W, and its maximum power dissipation is 1.1 W at TA = 25°C. Its integrated thermal shutdown activates between 150°C and 200°C, protecting against sustained overload conditions.
TLC5925IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-TSSOP (0.173", 4.40mm 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:
- 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
TLC5925IPWR FAQ
1.How can I place an order for TLC5925IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5925IPWR 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 TLC5925IPWR reliable?
The price and inventory of TLC5925IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5925IPWR is usually 5 days.
3.What payment methods are accepted for TLC5925IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5925IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5925IPWR?
TLC5925IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5925IPWR 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 TLC5925IPWR?
For technical support, including TLC5925IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5925IPWR requirements.
6.How does Aetrix verify that TLC5925IPWR is sourced from the original manufacturer or authorized distributors?
All TLC5925IPWR 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 TLC5925IPWR meets industry standards.
7.What is the process for return or replacement of TLC5925IPWR?
All TLC5925IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5925IPWR, 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 TLC5925IPWR part is unused and in its original packaging.
Return procedure for TLC5925IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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