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Texas Instruments TLC5905PAP
- Part No.:
- TLC5905PAP
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 64-PowerTQFP
- Datasheet:
-
TLC5905PAP.pdf
- Description:
- IC LED DRV LIN 80/120MA 64HTQFP
- Quantity:
- Payment:
- Shipping:
Inventory:4,399
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Product details
Overview
TLC5905PAP from Texas Instruments is a 16-channel constant-current LED driver IC with programmable output current (5–80 mA per channel), 256-step PWM grayscale control, and integrated OVM/WDT/TSD protection. It operates from 4.5–5.5 V logic supply and supports up to 17 V LED anode voltage, targeting high-reliability outdoor signage and industrial panel displays.
For engineers reviewing the TLC5905PAP datasheet, TLC5905PAP pinout, TLC5905PAP application, or TLC5905PAP equivalent, key selection criteria include its dual-mode current configuration (80 mA × 16 bits or 120 mA × 8 bits), ±4% inter-channel current accuracy, thermal shutdown at 150–170°C, and 64-pin HTQFP package with exposed thermal pad.
Technical Context
The TLC5905PAP integrates a 16-bit shift register with independent brightness latch, 256-step grayscale counter, and 16-channel constant-current sink drivers. Its MODE pin selects between full 16-bit operation (80 mA max) or 8-bit mode (120 mA max), reconfiguring internal data latching and current reference scaling accordingly.
It features three dedicated protection circuits: Output Voltage Monitor (OVM) detects LED open/short via XDOWN2, Watchdog Timer (WDT) disables outputs if scan signal halts (adjustable via WDCAP capacitor), and Thermal Shutdown (TSD) triggers at 150–170°C junction temperature when TSENA is high.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Channels | 16 constant-current sinks (configurable as 80 mA × 16 or 120 mA × 8) |
| Current Accuracy | ±4% max error between channels - ensures uniform LED brightness across display segments |
| Grayscale Resolution | 256-step PWM control - enables smooth intensity gradation without visible banding |
| Supply Voltages | VCCLOG/VCCANA/VCCLED = 4.5–5.5 V; supports independent power domains for noise isolation |
| Max Output Voltage | 17 V on OUTn pins - drives high-Vf LEDs or series strings in signage applications |
| Operating Temperature | –20°C to +85°C - qualified for industrial ambient conditions without derating |
| Package | 64-pin HTQFP with exposed thermal pad - enables 4.9 W dissipation at TA = 25°C |
Pinout & Package
64-pin HTQFP (PAP) package with exposed thermal pad connected to GNDLED for enhanced thermal performance. Pin functions validated per SLLS401 datasheet Rev. November 1999.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT0–OUT15 | Constant-current output sink | 16 individually controlled LED cathode connections; each delivers precise current set by IREF resistor |
| IREF | Current reference input | External resistor sets all output currents; 37× IREF current mirrored to outputs |
| MODE | Output configuration select | High = 80 mA × 16 bits; Low = 120 mA × 8 bits - changes internal shift register depth and latch mapping |
| GSCLK | Grayscale clock input | Drives 256-step PWM counter; max 8 MHz frequency determines update rate and flicker suppression |
| BLANK | Global output enable/disable | High = all outputs off (fast blanking); falling edge synchronizes next grayscale cycle |
| XDOWN1 / XDOWN2 | Fault indicator outputs | Open-collector signals: XDOWN1 = WDT/TSD trip; XDOWN2 = OVM comparator output (LED fault) |
Key Features
| Feature | Design Value |
|---|---|
| Configurable output mode | Single MODE pin selects between 16-channel/80 mA or 8-channel/120 mA operation - adapts to panel density vs. brightness requirements |
| Brightness deviation correction | 32-step external brightness adjustment per IC - compensates for batch-to-batch LED forward-voltage variation |
| Panel-level brightness control | 8-step gray-scale clock division - adjusts overall display luminance without changing PWM data |
| OVM-based LED fault detection | Monitors output voltage during active drive; asserts XDOWN2 on open-circuit or short-circuit - enables real-time panel health monitoring |
| Watchdog timer with adjustable timeout | Capacitor on WDCAP sets WDT detection window (5–15 ms); WDTRG input allows external scan-signal monitoring |
Applications
| Outdoor LED Signage | Industrial Control Panels |
|---|---|
|
Use Scenario: Large-format alphanumeric and graphic displays exposed to sunlight and wide temperature swings. IC Role / Device Role / Timing Role: Constant-current sink driver for red/green/blue LED modules; provides synchronized grayscale timing via GSCLK and BLANK. Use Value: ±4% current matching ensures consistent color balance across modules; 17 V output headroom supports multi-LED series strings. |
Use Scenario: Operator interface panels in factory automation systems requiring high reliability and long service life. IC Role / Device Role / Timing Role: LED backlight and status indicator driver with built-in fault detection and thermal protection. Use Value: XDOWN1/XDOWN2 outputs feed PLC inputs for predictive maintenance; TSD prevents thermal runaway in enclosed enclosures. |
| Architectural Lighting | Test & Measurement Equipment |
|
Use Scenario: Dynamic color-tuning fixtures using RGBW LED arrays with precise intensity control. IC Role / Device Role / Timing Role: Current-controlled channel driver enabling 256-step dimming per color channel; RSEL0/RSEL1 configure brightness/OVM registers. Use Value: Independent 32-step brightness adjustment per IC corrects binning variance across LED batches - critical for color fidelity. |
Use Scenario: Front-panel LED indicators in bench instruments where visual clarity and failure visibility are essential. IC Role / Device Role / Timing Role: Fault-aware LED driver with watchdog-triggered shutdown - prevents misleading status indication during firmware hangs. Use Value: WDT monitors microcontroller scan signals; automatic output disable on freeze avoids false "operational" indication. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC59283PWP | 24-channel, 12-bit grayscale, no OVM/WDT/TSD; requires external current-setting resistors per channel | Lacks integrated fault protection and thermal shutdown - suitable only for low-risk, manually monitored environments | Select when higher channel count is needed and system-level protection is implemented externally |
| MAX7219CWG+ | 8-digit/64-segment LED driver; serial interface only; fixed 40 mA per segment; no programmable current or OVM | Designed for numeric displays, not general-purpose LED arrays; no analog voltage monitoring capability | Choose for simple 7-segment or dot-matrix applications where grayscale depth and fault detection are unnecessary |
Compared with TLC5905PAP, TLC59283PWP offers greater channel density but sacrifices integrated protection and per-IC brightness calibration, while MAX7219CWG+ provides simpler integration for legacy numeric displays but lacks the precision current control and diagnostic features required for modern RGB signage.
Availability
TLC5905PAP is available at Aetrix Electronics and suitable for outdoor signage, industrial HMI panels, architectural lighting, and test equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLC5905PAP 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 and embedded processing technologies, with decades of experience in high-reliability industrial and automotive-grade components.
The TLC5905PAP belongs to TI's constant-current LED driver product line, designed specifically for large-area, high-brightness displays requiring robust fault detection, thermal resilience, and precise grayscale control in harsh environments.
FAQ
What is the maximum output current per channel for TLC5905PAP?
The TLC5905PAP supports two output configurations selected by the MODE pin: when MODE = high, it delivers up to 80 mA per channel across all 16 outputs; when MODE = low, it delivers up to 120 mA per channel across 8 outputs. The actual current is set by an external resistor on the IREF pin and is accurate to ±4% between channels. This dual-mode flexibility allows designers to optimize for either channel count or peak brightness in the TLC5905PAP implementation.
How does the Output Voltage Monitor (OVM) function in TLC5905PAP?
The OVM in TLC5905PAP continuously monitors the voltage at each constant-current output (OUT0–OUT15) during active drive. When the monitored voltage falls below a threshold set by the OVM latch (default 0.3 V when MCENA = low), XDOWN2 goes low to indicate an LED open-circuit or short-circuit condition. This real-time feedback enables system-level diagnostics without requiring external sensing circuitry - a core safety feature of the TLC5905PAP.
Can TLC5905PAP operate with different supply voltages for logic and LED sections?
Yes, the TLC5905PAP has three independent supply pins: VCCLOG (logic), VCCANA (analog reference), and VCCLED (constant-current driver). All must be within 4.5–5.5 V, but they may be sourced from separate regulators to isolate digital noise from analog current-setting circuitry. The datasheet specifies voltage differentials between supplies must stay within ±0.3 V, ensuring stable internal biasing - a critical design constraint for noise-sensitive TLC5905PAP deployments.
What is the role of the WDCAP pin on TLC5905PAP?
The WDCAP pin on TLC5905PAP sets the watchdog timer (WDT) timeout period by connecting an external capacitor to GND. Capacitance values determine detection time: 0 nF (direct GND tie) disables WDT; typical values yield 5–15 ms timeout. When WDTRG receives no valid scan pulses within this window, the TLC5905PAP disables all outputs to protect LEDs from burn-in - making WDCAP a key tuning element for system responsiveness and safety in the TLC5905PAP design.
Does TLC5905PAP support daisy-chaining for multi-device systems?
Yes, the TLC5905PAP supports cascade operation via its serial interface: SIN accepts data input, and SOUT provides synchronized 1-bit serial output. With SOMODE configured for rising- or falling-edge synchronization, multiple TLC5905PAP devices can be chained to drive large LED arrays with minimal MCU GPIO usage. The datasheet confirms 10 MHz SCLK operation in cascade mode - enabling high-throughput updates across extended displays using the TLC5905PAP.
TLC5905PAP Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 64-PowerTQFP
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- Yes
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 80mA, 120mA
- Frequency:
- 15MHz
- Dimming:
- -
- Applications:
- -
- Operating Temperature:
- -30°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-HTQFP (10x10)
TLC5905PAP FAQ
1.How can I place an order for TLC5905PAP through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5905PAP 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 TLC5905PAP reliable?
The price and inventory of TLC5905PAP are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5905PAP is usually 5 days.
3.What payment methods are accepted for TLC5905PAP?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5905PAP transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5905PAP?
TLC5905PAP orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5905PAP 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 TLC5905PAP?
For technical support, including TLC5905PAP datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5905PAP requirements.
6.How does Aetrix verify that TLC5905PAP is sourced from the original manufacturer or authorized distributors?
All TLC5905PAP 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 TLC5905PAP meets industry standards.
7.What is the process for return or replacement of TLC5905PAP?
All TLC5905PAP units undergo pre-shipment inspection (PSI). If there is an issue with TLC5905PAP, 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 TLC5905PAP part is unused and in its original packaging.
Return procedure for TLC5905PAP:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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