My Inquiry
My Account
Texas Instruments TLC5947DAPG4
- Part No.:
- TLC5947DAPG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Datasheet:
-
TLC5947DAPG4.pdf
- Description:
- IC LED DRVR LINEAR 30MA 32HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,648
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TLC5947DAPG4 from Texas Instruments is a 24-channel, constant-current sink LED driver IC with integrated 4-MHz oscillator, 12-bit (4096-step) PWM grayscale control, ±2% channel-to-channel current accuracy, and thermal shutdown protection. It operates from 3.0 V to 5.5 V supply and supports up to 30 V LED power rails - used in high-fidelity static LED displays requiring precise brightness uniformity across large pixel arrays.
For engineers reviewing the TLC5947DAPG4 datasheet, TLC5947DAPG4 pinout, TLC5947DAPG4 application, or TLC5947DAPG4 equivalent, key selection considerations include its 32-pin HTSSOP (DAP) package with PowerPAD™, cascaded SOUT/SIN interface for multi-device daisy-chaining, IREF resistor-based current setting, and grouped 4×6-channel soft-start timing to suppress inrush current and EMI.
Technical Context
The TLC5947DAPG4 implements a fully autonomous PWM timing engine driven by its internal 4-MHz oscillator, eliminating external clock dependencies. Grayscale data (288 bits) are serially loaded via SIN/SCLK, latched on XLAT rising edge, and applied to 24 independent constant-current sinks - each with programmable 0–100% duty cycle resolution in 0.024% steps.
Its noise-reduction architecture staggers turn-on/turn-off of output channels across four 6-channel groups (e.g., OUT0/4/8/12/16/20 → OUT1/5/9/13/17/21 → OUT2/6/10/14/18/22 → OUT3/7/11/15/19/23), limiting peak current slew rate. Thermal shutdown activates at 162°C (typ) junction temperature and auto-recovers after hysteresis threshold is crossed.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | 24 independent constant-current sink outputs (OUT0–OUT23) |
| PWM resolution | 12-bit (4096 grayscale steps), enabling 0.024% brightness granularity |
| Output current | Up to 30 mA per channel, set externally via IREF resistor (e.g., 1.6 kΩ → 30 mA) |
| LED voltage support | Up to 30 V output compliance - enables driving multiple LEDs in series per channel |
| Data rate | 30 MHz standalone SCLK; 15 MHz in cascaded mode (50% duty cycle) |
| Operating temp | –40°C to +85°C ambient, with thermal shutdown active up to 175°C junction |
| Supply voltage | 3.0 V to 5.5 V VCC - compatible with standard logic-level microcontrollers |
Pinout & Package
Package: HTSSOP-32 (DAP) with exposed thermal pad (11.00 mm × 6.20 mm); requires soldered PowerPAD™ for rated thermal performance (RθJA = 32.8°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (GND) | Power ground reference | Primary return path for all output currents and internal logic; must be low-impedance connection to PCB ground plane |
| 2 (BLANK) | Global output enable/disable control | High forces all 24 outputs OFF and resets grayscale counter; low enables PWM operation |
| 3 (SCLK) | Serial data shift clock input | Rising edge clocks 288-bit grayscale data into shift register; falling edge outputs MSB on SOUT |
| 4 (SIN) | Serial grayscale data input | MSB-first 288-bit stream containing 12-bit values for OUT0–OUT23 |
| 5–28 (OUT0–OUT23) | Constant-current sink outputs | Each independently sinks up to 30 mA; open-drain structure allows connection to LED anodes via common VLED rail |
| 29 (SOUT) | Serial data output | Shifts out MSB of grayscale register on SCLK falling edge - enables daisy-chaining to next TLC5947 |
| 30 (XLAT) | Grayscale latch strobe | Rising edge transfers 288-bit data from shift register to grayscale latch; blanks outputs briefly during transfer |
| 31 (IREF) | Current reference node | Connect external resistor between IREF and GND to set full-scale sink current (e.g., 1.2 V / RIREF) |
| 32 (VCC) | Digital and analog supply | 3.0–5.5 V power for logic, oscillator, and current reference circuitry; bypass with ≥0.1 µF ceramic capacitor |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 4-MHz oscillator | Eliminates need for external clock source - simplifies BOM and layout for standalone LED systems |
| Auto display repeat | Continuously cycles grayscale PWM without host intervention - reduces MCU GPIO and timing overhead |
| 4-group staggered turn-on | Reduces peak inrush current by sequencing 6-channel groups with ~15–99 ns inter-group delay - lowers EMI and rail droop |
| Thermal shutdown with hysteresis | Shuts down all outputs at 162°C (typ) junction; restarts automatically when temp falls below 152–157°C - protects against sustained overloads |
| ±2% channel-to-channel accuracy | Ensures consistent LED brightness across 24 channels without per-channel calibration - critical for uniform signage and displays |
Applications
| Static LED Message Boards | Amusement Park Illumination |
|---|---|
Use Scenario: Outdoor alphanumeric message boards using high-brightness RGB LEDs arranged in dense matrices. IC Role / Device Role / Timing Role: Constant-current sink driver providing synchronized 12-bit grayscale control across 24 parallel LED strings per IC, with daisy-chained SOUT→SIN for large-area expansion. Use Value: Enables smooth, flicker-free text animation and color gradients while maintaining brightness uniformity across thousands of pixels - no external clock or PWM controller required. |
Use Scenario: Dynamic lighting effects in ride vehicles and themed environments where rapid brightness transitions and reliability under vibration are essential. IC Role / Device Role / Timing Role: Primary LED dimming engine delivering precise 0–100% intensity control per channel, coordinated via microcontroller SPI-like serial interface. Use Value: Staggered 4-group output activation minimizes audible coil whine and EMI-induced interference with nearby audio/sensor systems. |
| TV Backlighting Modules | Architectural Accent Lighting |
Use Scenario: Edge-lit LCD TV backlights using white LEDs in linear arrays, requiring local dimming zones for contrast enhancement. IC Role / Device Role / Timing Role: Zone-specific current sink controlling 24 individual LED segments per module, with thermal shutdown safeguarding against localized overheating. Use Value: ±2% channel matching ensures uniform luminance across backlight zones - eliminating visible banding in dark scenes. |
Use Scenario: Long-run linear LED strips mounted on building facades or interior features, powered from centralized 24–30 V DC supplies. IC Role / Device Role / Timing Role: High-voltage-tolerant (30 V) constant-current driver enabling direct connection to long-string LEDs without additional voltage translation. Use Value: 30 V output compliance supports up to 8–10 white LEDs in series per channel - reducing wiring complexity and driver count per installation. |
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 |
|---|---|---|---|
| TLC5947RHB | Same die, QFN-32 (5.0 × 5.0 mm) package without PowerPAD™; higher RθJA (≈42°C/W unsoldered) | Better suited for space-constrained PCBs where thermal mass is limited and airflow exists | Select TLC5947RHB only if board area is critical and thermal derating can be accommodated; TLC5947DAPG4 preferred for high-power density designs. |
| MAX6967AUG+ | 20-channel, 12-bit PWM driver; 25 mA max per channel; I²C interface instead of serial shift-in; no internal oscillator | Requires external clock and I²C master; lower channel count but smaller footprint (24-pin TSSOP) | Choose MAX6967AUG+ for I²C-based systems with ≤20 channels and tighter board real estate; not drop-in compatible due to interface and pinout differences. |
Compared with TLC5947RHB and MAX6967AUG+, the TLC5947DAPG4 delivers superior thermal performance via PowerPAD™, native serial daisy-chaining, and autonomous operation - making it optimal for high-channel-count, high-reliability LED signage and industrial illumination where layout simplicity and thermal robustness are prioritized.
Availability
TLC5947DAPG4 is available at Aetrix Electronics and suitable for static LED displays, amusement illumination systems, and TV backlighting modules requiring stable component supply, long-term manufacturability, and guaranteed thermal performance under continuous operation.
Supply support for TLC5947DAPG4 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 power management technologies - with decades of expertise in precision LED drivers and industrial-grade IC design.
The TLC5947 product line was engineered specifically for high-channel-count, high-accuracy LED display systems demanding autonomous grayscale control, thermal resilience, and minimal external components - targeting signage, entertainment, and architectural lighting markets.
FAQ
What is the maximum LED forward voltage supported by the TLC5947DAPG4?
The TLC5947DAPG4 supports up to 30 V output compliance across all 24 channels. This allows driving strings of 8–10 standard white LEDs (3.0–3.4 V each) in series per channel without external boost circuitry - verified under recommended operating conditions with VOUTn ≤ 30 V and IOUT ≤ 30 mA.
How does the TLC5947DAPG4 achieve thermal protection?
The TLC5947DAPG4 integrates a thermal shutdown (TSD) circuit that disables all 24 output drivers when junction temperature exceeds 162°C (typical). Outputs automatically resume operation once temperature falls below the hysteresis threshold (≈152–157°C), as confirmed in Section 8.3.3 of the SBVS114B datasheet.
Can the TLC5947DAPG4 operate without an external clock source?
Yes - the TLC5947DAPG4 contains a factory-trimmed 4-MHz internal oscillator (2.4–5.6 MHz range) that drives its PWM timing engine. No external clock is needed for basic grayscale operation, though SCLK remains required for serial data loading. This feature is explicitly documented in the Features and Detailed Description sections of the datasheet.
What is the purpose of the IREF pin on the TLC5947DAPG4?
The IREF pin sets the full-scale constant-current value for all 24 channels via an external resistor to GND. With a typical reference voltage of 1.20 V, a 1.6 kΩ resistor yields 30 mA per channel (IOUT = 1.20 V / RIREF). This single-point adjustment eliminates per-channel calibration and ensures matched current across outputs.
How does the TLC5947DAPG4 reduce electromagnetic interference (EMI)?
The TLC5947DAPG4 reduces EMI by staggering output turn-on/turn-off across four 6-channel groups (e.g., OUT0/4/8/12/16/20 → OUT1/5/9/13/17/21). This 4-channel grouped delay limits simultaneous current slew rate - directly addressing inrush current noise as described in Section 8.3.4 of the SBVS114B datasheet.
TLC5947DAPG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 32-PowerTSSOP (0.240", 6.10mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 24
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 30V
- Current - Output / Channel:
- 30mA
- Frequency:
- 4MHz
- Dimming:
- -
- Applications:
- Backlight
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-HTSSOP
TLC5947DAPG4 FAQ
1.How can I place an order for TLC5947DAPG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5947DAPG4 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 TLC5947DAPG4 reliable?
The price and inventory of TLC5947DAPG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5947DAPG4 is usually 5 days.
3.What payment methods are accepted for TLC5947DAPG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5947DAPG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5947DAPG4?
TLC5947DAPG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5947DAPG4 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 TLC5947DAPG4?
For technical support, including TLC5947DAPG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5947DAPG4 requirements.
6.How does Aetrix verify that TLC5947DAPG4 is sourced from the original manufacturer or authorized distributors?
All TLC5947DAPG4 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 TLC5947DAPG4 meets industry standards.
7.What is the process for return or replacement of TLC5947DAPG4?
All TLC5947DAPG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5947DAPG4, 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 TLC5947DAPG4 part is unused and in its original packaging.
Return procedure for TLC5947DAPG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5947DAPG4 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…
