My Inquiry
My Account
Texas Instruments TLC5928PWR
- Part No.:
- TLC5928PWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5928PWR.pdf
- Description:
- IC LED DRVR LINEAR 35MA 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:5,827
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC5928PWR from Texas Instruments is a 16-channel constant-current LED sink driver with integrated LED open detection (LOD) and pre-thermal warning (PTW). It delivers up to 35 mA per channel, supports 35-MHz serial data transfer, operates from 3.0 V to 5.5 V VCC, and features 20-ns BLANK pulse width - used in high-reliability LED video displays and message boards where fault-aware illumination control is critical.
For engineers reviewing the TLC5928PWR datasheet, TLC5928PWR pinout, TLC5928PWR application, or TLC5928PWR equivalent, key selection considerations include its daisy-chainable serial interface (SIN/SCLK/LAT/BLANK), IREF-set current accuracy (±1% channel-to-channel), LOD/PTW error reporting via SOUT, and TSSOP-24 package thermal performance under sustained LED load conditions.
Technical Context
The TLC5928PWR implements a 16-bit serial shift register followed by a parallel latch for on/off control of each constant-current sink output. Its LOD circuit monitors OUTn voltage during active sinking (VOUTn ≤ 0.30 V triggers detection), while PTW activates at junction temperature ≥ +138 °C (typ), both latched and readable via SOUT on rising BLANK edges.
Current regulation relies on an external resistor (RIREF) tied between IREF and GND, generating a reference voltage of 1.20 V (typ) to set sink current from 2 mA to 35 mA. All 16 outputs switch synchronously with < ±8 ns on-time error, enabling precise PWM dimming in time-critical LED arrays without inter-channel skew.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - compatible with standard logic-level microcontrollers and industrial 3.3 V/5 V systems. |
| Output Current | Up to 35 mA per channel - sufficient to drive high-brightness LEDs directly without external boost stages. |
| LED Open Detection Threshold | 0.30 V (typ) - reliably identifies open or GND-shorted LEDs while maintaining >0.3 V forward drop margin during normal operation. |
| Pre-Thermal Warning Threshold | +138 °C (typ) junction temperature - provides early overtemperature alert before thermal shutdown occurs. |
| Data Transfer Rate | 35 MHz SCLK - enables full 16-bit update in under 460 ns, supporting high-refresh-rate LED panels. |
| BLANK Pulse Width | 20 ns minimum - ensures clean, jitter-free global blanking for synchronized display frame control. |
| Constant-Current Accuracy | ±1% channel-to-channel - minimizes brightness variation across multi-LED segments without per-channel calibration. |
Pinout & Package
TLC5928PWR is housed in a 24-pin TSSOP package (PW suffix), with exposed thermal pad on bottom side requiring PCB GND connection for optimal power dissipation (9.6 mW/°C derating above +25°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SIN | Serial input | Accepts LSB-first 16-bit on/off data; Schmitt-triggered for noise immunity in noisy LED environments. |
| SCLK | Shift clock | Rising-edge synchronized data shift; 35-MHz max rate enables rapid reconfiguration of all 16 channels. |
| LAT | Latch enable | Transfers shift register contents to output latch; must be pulsed once after data load to avoid LOD/PTW overwrite. |
| BLANK | Global output disable | Forces all 16 outputs OFF when high; rising edge latches LOD/PTW status into SID register for readback. |
| IREF | Current reference | Outputs 1.20 V (typ); connects to external resistor to set precise sink current across all channels. |
| SOUT | Serial output | Shifts out LOD/PTW status bits (MSB first) on SCLK rising edges; enables daisy-chained error monitoring. |
| OUT0–OUT15 | Constant-current sinks | Each drives one LED cathode; supports up to 17 V LED supply voltage and tolerates reverse voltage down to –0.3 V. |
| VCC / GND | Power rails | Separate VCC (pin 24) and GND (pin 1) pins minimize supply noise coupling into analog current paths. |
Key Features
| Feature | Design Value |
|---|---|
| 16-channel constant-current sink | Delivers matched 35-mA output per channel with ±1% channel-to-channel accuracy - eliminates LED brightness non-uniformity in large arrays. |
| Integrated LED open detection (LOD) | Detects open or GND-shorted LEDs during active sinking (VOUTn ≤ 0.30 V) and reports per-channel faults via SOUT - reduces system-level diagnostic overhead. |
| Pre-thermal warning (PTW) | Flags junction temperature ≥ +138 °C (typ) by setting all SOUT bits high - enables proactive thermal management before device derating or failure. |
| Daisy-chainable serial interface | Single SIN/SCLK/LAT/BLANK/SOUT bus controls multiple TLC5928PWR devices - simplifies routing and reduces MCU GPIO count in multi-segment displays. |
| Low on-time error | ±8 ns maximum mismatch between channel turn-on timing - preserves PWM fidelity and prevents visible banding in high-speed scrolling text. |
Applications
| LED Video Display | Message Board |
|---|---|
Use Scenario: Outdoor full-color LED matrix panel with 16×N pixel modules driven by row/column scanning. IC Role / Device Role / Timing Role: Constant-current sink driver for column cathodes; synchronizes blanking and LOD reporting across daisy-chained units. Use Value: Enables uniform brightness at 35 mA/channel while detecting failed LEDs in real time - reducing maintenance downtime and field service costs. |
Use Scenario: Public transit schedule board using monochrome red/green LED segments updated every 5 seconds. IC Role / Device Role / Timing Role: Serial-controlled LED driver with BLANK-gated refresh and PTW-triggered duty-cycle throttling. Use Value: Prevents thermal runaway during extended operation by lowering segment current upon +138 °C junction detection - extending display lifetime. |
| Illumination Control | Industrial Status Indicator |
Use Scenario: High-bay warehouse lighting with grouped LED strings powered from 12–24 V DC rails. IC Role / Device Role / Timing Role: Precision current source for LED groups; uses IREF resistor to maintain consistent lumen output across temperature. Use Value: Achieves ±1% channel-to-channel current matching - eliminating visible intensity gradients in adjacent light zones. |
Use Scenario: Factory machine HMI panel with 16 discrete status LEDs indicating operational states (run/stop/fault/standby). IC Role / Device Role / Timing Role: Fault-aware LED driver; reads LOD status via SOUT to auto-flag disconnected indicator LEDs. Use Value: Reduces false alarms by distinguishing true hardware failures (open LED) from transient signal glitches - improving operator trust in diagnostics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5940QPWPR | 16-channel, but adds grayscale PWM (12-bit) and dot-correction; requires external VREF; no LOD/PTW. | Better suited for high-fidelity color mixing; lacks built-in fault detection - requires external monitoring circuitry. | Select when precise intensity control outweighs self-diagnostic capability and board space is available for extra components. |
| MAX7219CWG+ | 8-channel, multiplexed LED driver with SPI interface; includes scan-limiting and BCD decode; no current sensing or LOD. | Designed for 7-segment/8×8 matrix use; lower channel count and no open-LED detection limits scalability to large linear arrays. | Choose for compact numeric/alphanumeric displays where integrated decoding and low pin count are prioritized over per-channel current precision. |
Compared with TLC5928PWR, TLC5940QPWPR offers superior grayscale resolution but increases system complexity and cost, while MAX7219CWG+ simplifies design for small displays yet sacrifices channel count, current accuracy, and fault awareness - making TLC5928PWR optimal for medium-to-large LED arrays requiring reliability and minimal external components.
Availability
TLC5928PWR is available at Aetrix Electronics and suitable for LED video displays, message boards, and industrial illumination systems requiring stable component supply, long-term manufacturability, and guaranteed traceability.
Supply support for TLC5928PWR 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 high-reliability ICs for industrial, automotive, and communications markets.
The TLC5928 product line targets LED display and signage applications demanding robust fault detection, precise current matching, and daisy-chain scalability - delivering integrated LOD/PTW functionality without external supervision circuitry.
FAQ
What is the maximum LED supply voltage supported by the TLC5928PWR?
The TLC5928PWR supports LED power-supply voltages up to +17 V at its OUT0–OUT15 pins. This allows direct interfacing with common 12 V and 24 V LED string supplies without level-shifting or additional driver stages. The absolute maximum rating is +18 V, but operation at 17 V is specified across the full temperature range (–40°C to +85°C) and ensures reliable long-term performance in the TLC5928PWR.
How does the TLC5928PWR implement LED open detection (LOD)?
The TLC5928PWR monitors the voltage at each OUTn pin while the corresponding channel is actively sinking current. If VOUTn drops to ≤ 0.30 V (typical threshold), the LOD circuit flags that channel as open or shorted to GND. This status is latched on the rising edge of BLANK and shifted out via SOUT - enabling real-time, per-channel fault identification without interrupting normal LED operation in the TLC5928PWR.
Can multiple TLC5928PWR devices be daisy-chained, and how is error data read from the chain?
Yes, TLC5928PWR devices support seamless daisy-chaining: SOUT of one device connects to SIN of the next. To read LOD/PTW status, the controller pulses BLANK (latching error data), then clocks SCLK 16 × N times (where N = number of devices) while reading SOUT - the MSB-first stream contains concatenated 16-bit status words. This architecture maintains full visibility into all devices using only five control lines in the entire TLC5928PWR chain.
What is the role of the IREF pin, and how is output current calculated for the TLC5928PWR?
The IREF pin outputs a stable 1.20 V (typ) reference voltage. Connecting an external resistor (RIREF) between IREF and GND sets the sink current for all 16 channels using IOLC ≈ 42 × (1.20 V / RIREF). For example, a 1.44 kΩ resistor yields ~35 mA. The TLC5928PWR datasheet provides a lookup table confirming this relationship across 2–35 mA, ensuring predictable, resistor-programmable current without trimming or calibration.
Does the TLC5928PWR require external components for thermal management, and what is the recommended PCB layout?
Yes - the TLC5928PWR's TSSOP-24 package includes an exposed thermal pad that must be soldered to a dedicated GND copper area on the PCB (minimum 2 oz. copper). TI specifies 9.6 mW/°C derating above +25°C; insufficient copper area causes premature thermal throttling. Layout best practices include wide, short GND traces to minimize inductance-induced ground bounce during simultaneous 16-channel switching - a critical requirement explicitly called out in the TLC5928PWR datasheet.
TLC5928PWR 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:
- 35mA
- Frequency:
- 35MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
TLC5928PWR FAQ
1.How can I place an order for TLC5928PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5928PWR 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 TLC5928PWR reliable?
The price and inventory of TLC5928PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5928PWR is usually 5 days.
3.What payment methods are accepted for TLC5928PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5928PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5928PWR?
TLC5928PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5928PWR 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 TLC5928PWR?
For technical support, including TLC5928PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5928PWR requirements.
6.How does Aetrix verify that TLC5928PWR is sourced from the original manufacturer or authorized distributors?
All TLC5928PWR 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 TLC5928PWR meets industry standards.
7.What is the process for return or replacement of TLC5928PWR?
All TLC5928PWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5928PWR, 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 TLC5928PWR part is unused and in its original packaging.
Return procedure for TLC5928PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5928PWR Tags
-
BCR402RE6327HTSA1
Infineon Technologies
-
BCR430UXTSA2
Infineon Technologies
-
BCR420UE6433HTMA1
Infineon Technologies
-
BCR420UE6327HTSA1
Infineon Technologies
-
BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
-
HV9910CLG-G
Microchip Technology
-
CL2N8-G
Microchip Technology
-
BCR420UW6-7
Diodes Incorporated
-
BCR421UW6-7
Diodes Incorporated
-
BCR420UFD-7
Diodes Incorporated
-
BCR421UFD-7
Diodes Incorporated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
