My Inquiry
My Account
Texas Instruments TLC5928RGER
- Part No.:
- TLC5928RGER
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
TLC5928RGER.pdf
- Description:
- IC LED DRIVER LINEAR 35MA 24VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:21,388
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC5928RGER 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 - enabling high-refresh-rate LED video displays and message boards.
For engineers reviewing the TLC5928RGER datasheet, TLC5928RGER pinout, TLC5928RGER application, or TLC5928RGER equivalent, key selection considerations include its QFN-24 package thermal performance, 16-bit serial interface timing (SIN/SCLK/LAT/BLANK), LOD error readback via SOUT, and IREF-resistor-set current accuracy of ±1% channel-to-channel.
Technical Context
The TLC5928RGER implements a 16-bit serial shift register followed by a parallel latch for on/off control of all 16 constant-current sinks. Its LOD circuit monitors each OUTn voltage during active sinking (VOUTn ≤ 0.30 V triggers detection), while PTW activates at junction temperature ≥ +138 °C (typ).
It uses a single external resistor (RIREF) between IREF and GND to set uniform sink current across all channels (2–35 mA range), with line regulation ±0.5%/V and load regulation ±1%/V. All outputs switch synchronously with <8 ns on-time error under 20-ns BLANK control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 3.0 V to 5.5 V - compatible with standard 3.3 V and 5 V logic and power rails |
| Output Current | Up to 35 mA per channel - sufficient for driving medium-brightness LEDs without external amplification |
| Channel Count | 16 independent constant-current sinks - supports full-color RGB modules or segmented signage |
| Data Rate | 35 MHz SCLK - enables >1 kHz refresh for 16-channel PWM with minimal serial overhead |
| LOD Threshold | 0.30 V (typ) - detects open or GND-shorted LEDs while maintaining margin against forward-voltage variation |
| BLANK Pulse Width | 20 ns minimum - ensures precise, jitter-free blanking for high-speed multiplexed displays |
| Thermal Warning | +138 °C junction threshold (typ) - provides early overtemperature indication before thermal shutdown |
Pinout & Package
Package: QFN-24 (RGE), 4 mm × 4 mm, 0.5 mm pitch, exposed thermal pad (not internally connected to GND; must be soldered to PCB ground plane).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SIN | Serial data input | Latches LSB-first 16-bit on/off data into shift register on SCLK rising edge |
| SCLK | Serial clock input | Drives synchronous 16-bit shift; Schmitt-triggered for noise immunity |
| LAT | Latch control input | Transfers shift register contents to output latch; also loads LOD/PTW status into shift register |
| BLANK | Global output enable | Forces all 16 outputs OFF when high; rising edge latches LOD/PTW status into SID register |
| IREF | Current reference terminal | Connects to external resistor to GND; sets all 16 channel currents with ±1% matching |
| SOUT | Serial data output | Shifts out 16-bit LOD/PTW status (MSB first) on SCLK rising edges after BLANK/LAT sequence |
| OUT0–OUT15 | Constant-current sink outputs | Each independently controlled; rated for 17 V max output voltage and 40 mA absolute max |
| VCC / GND | Power supply terminals | VCC powers logic and output drivers; GND reference for IREF, inputs, and thermal pad |
Key Features
| Feature | Design Value |
|---|---|
| LED Open Detection (LOD) | Per-channel voltage monitoring during ON state; reports open/short-to-GND faults via SOUT readback |
| Pre-Thermal Warning (PTW) | Junction temperature monitoring with +138 °C threshold; asserts all SID bits high for immediate system-level alert |
| Low On-Time Error | ±8 ns maximum deviation - ensures uniform brightness in time-multiplexed LED arrays |
| High-Speed Switching | 10 ns typical rise/fall time on OUTn - minimizes switching loss and EMI in high-frequency PWM |
| CMOS Logic Compatibility | VIH = 0.7×VCC, VIL = 0.3×VCC - interoperable with 3.3 V and 5 V microcontrollers without level shifting |
Applications
| LED Video Displays | Message Boards |
|---|---|
Use Scenario: High-resolution outdoor LED panels requiring synchronized 16-channel PWM dimming and fault monitoring. IC Role / Device Role / Timing Role: Constant-current sink driver with serial daisy-chain capability and real-time LOD reporting for pixel-level reliability. Use Value: Enables >1 kHz frame rates with <8 ns channel timing skew and automatic open-LED identification without added sensing circuitry. |
Use Scenario: Modular alphanumeric signage using cascaded LED modules with remote diagnostics. IC Role / Device Role / Timing Role: Serial-controlled 16-output driver with BLANK-synchronized status readback for centralized fault logging. Use Value: Reduces wiring complexity via daisy-chained SIN/SOUT and eliminates manual LED continuity checks through automated LOD detection. |
| Illumination Systems | Industrial Control Panels |
Use Scenario: Architectural lighting strips with uniform color mixing and thermal derating feedback. IC Role / Device Role / Timing Role: Precision current source with PTW flag for dynamic brightness reduction before thermal throttling. Use Value: Maintains consistent lumen output across temperature gradients and prevents LED degradation via proactive thermal management. |
Use Scenario: Operator interface panels with status indicators requiring long-term reliability and failure traceability. IC Role / Device Role / Timing Role: Fault-aware LED driver that reports open-circuit conditions to host MCU via SOUT during routine BLANK cycles. Use Value: Eliminates field service visits for dead-indicator troubleshooting by enabling remote diagnostic readout of all 16 channels. |
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 |
|---|---|---|---|
| TLC5940RHBR | 16-channel, but includes built-in grayscale PWM (12-bit), no LOD/PTW, requires external VREF | Better suited for high-fidelity grayscale display where per-channel intensity control outweighs fault detection | Select when precise PWM dimming is prioritized over open-LED diagnostics and thermal monitoring |
| MAX7219CWG+ | 8-digit/64-LED scan driver with SPI interface, internal clock, no IREF-based current setting | Optimized for 7-segment/matrix displays with integrated decode; lacks per-output voltage tolerance and LOD | Choose for compact numeric/alphanumeric displays where serial simplicity and onboard oscillator reduce BOM count |
Compared with TLC5928RGER, TLC5940RHBR offers superior grayscale resolution but omits fault detection, while MAX7219CWG+ simplifies system integration for digit-based UIs but sacrifices per-channel current programmability and open-LED visibility.
Availability
TLC5928RGER is available at Aetrix Electronics and suitable for LED video displays, message boards, and industrial illumination systems requiring stable component supply, extended temperature operation (–40°C to +85°C), and robust fault diagnostics.
Supply support for TLC5928RGER 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 consumer applications.
The TLC5928 product line was designed specifically for high-channel-count LED driving in demanding visual applications, emphasizing timing precision, thermal awareness, and system-level fault observability - not just current regulation.
FAQ
What is the maximum LED supply voltage supported by the TLC5928RGER?
The TLC5928RGER supports up to 17 V on its OUT0–OUT15 pins, allowing direct connection to common LED strings powered from 12 V or 15 V rails without external voltage translation. This rating holds across the full operating temperature range (–40°C to +85°C) and is validated per absolute maximum specifications in the SBVS120E datasheet.
How does the TLC5928RGER implement LED open detection?
The TLC5928RGER monitors the voltage at each OUTn pin while the corresponding channel is actively sinking current. If VOUTn drops to ≤0.30 V (typ), the LED open detection (LOD) circuit flags that channel in the Status Information Data (SID) register. This status is latched on the rising edge of BLANK and shifted out via SOUT for host MCU readback - enabling per-LED fault isolation without additional sensors.
Can the TLC5928RGER be daisy-chained with other TLC5928 devices?
Yes, the TLC5928RGER supports seamless daisy-chaining: connect SOUT of one device to SIN of the next, share SCLK, LAT, and BLANK lines, and use a single IREF resistor per device. The 16-bit serial interface allows cascading multiple TLC5928RGER units to drive 32, 48, or more LEDs with one microcontroller port - confirmed in TI's SBVS120E typical application circuit.
What is the role of the IREF pin on the TLC5928RGER?
The IREF pin on the TLC5928RGER connects to an external resistor (RIREF) tied to GND, establishing the reference for all 16 constant-current sinks. With a typical internal reference voltage of 1.20 V, RIREF values from 1.44 kΩ (35 mA) to 25.2 kΩ (2 mA) set the per-channel current. Channel-to-channel matching remains within ±1%, ensuring uniform LED brightness across the array.
Does the TLC5928RGER require external components for thermal management?
The TLC5928RGER QFN-24 (RGE) package includes an exposed thermal pad that must be soldered to a PCB copper area connected to GND. No external heatsink is required for typical operation at ≤35 mA/channel and ambient ≤+70°C, but TI specifies 24.8 mW/°C thermal resistance - meaning board-level copper area and layer count directly impact safe power dissipation and junction temperature rise.
TLC5928RGER Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- 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-VQFN (4x4)
TLC5928RGER FAQ
1.How can I place an order for TLC5928RGER through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5928RGER 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 TLC5928RGER reliable?
The price and inventory of TLC5928RGER are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5928RGER is usually 5 days.
3.What payment methods are accepted for TLC5928RGER?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5928RGER transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5928RGER?
TLC5928RGER orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5928RGER 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 TLC5928RGER?
For technical support, including TLC5928RGER datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5928RGER requirements.
6.How does Aetrix verify that TLC5928RGER is sourced from the original manufacturer or authorized distributors?
All TLC5928RGER 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 TLC5928RGER meets industry standards.
7.What is the process for return or replacement of TLC5928RGER?
All TLC5928RGER units undergo pre-shipment inspection (PSI). If there is an issue with TLC5928RGER, 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 TLC5928RGER part is unused and in its original packaging.
Return procedure for TLC5928RGER:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5928RGER 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…
