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Texas Instruments TLC5917IPWR
- Part No.:
- TLC5917IPWR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5917IPWR.pdf
- Description:
- IC LED DRVR LINEAR 120MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,261
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Product details
Overview
TLC5917IPWR from Texas Instruments is an 8-channel constant-current LED sink driver IC designed for precise current control in LED display and lighting systems. It delivers 3–120 mA per channel with ±3% inter-channel current matching, supports 3.0–5.5 V supply, and features open-load, short-load (TLC5917 only), and overtemperature detection - enabling reliable operation in video billboards and gaming machine LED arrays.
For engineers reviewing the TLC5917IPWR datasheet, TLC5917IPWR pinout, TLC5917IPWR application, or TLC5917IPWR equivalent, key selection considerations include its 30-MHz serial interface, error-detection capability via SDO readback, R-EXT-based current programming, and compatibility with cascaded LED driver topologies requiring fault visibility and thermal resilience.
Technical Context
The TLC5917IPWR integrates an 8-bit shift register, output latches, and eight independent constant-current sinks with integrated error sensing circuitry. Its dual-mode operation - Normal Mode for data loading and Special Mode for error status readback or 256-step global current gain adjustment - is controlled by pulse-triggered transitions on OE(ED2) and level-sensitive LE(ED1).
Unlike the TLC5916, the TLC5917IPWR adds short-circuit detection per channel using voltage thresholds (VOUT,TTh = 2.5–3.1 V, VOUT,RTh = 2.2 V), alongside open-load and overtemperature detection. All error flags are stored in an 8-bit status register accessible via serial shift-out on SDO synchronized to CLK.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 8 independent constant-current sink outputs (OUT0–OUT7) |
| Output current range | 3 mA to 120 mA per channel, set by single R-EXT resistor |
| Current accuracy | < ±3% max between channels; < ±6% max between ICs |
| Max LED voltage | 20 V - supports multi-LED strings or high-VF LEDs without external boost |
| Serial clock frequency | Up to 30 MHz - enables fast refresh in high-resolution LED panels |
| Error detection | Open-load, short-load (TLC5917 only), and overtemperature per channel |
| Supply voltage | 3.0 V to 5.5 V - compatible with both 3.3-V and 5-V controller systems |
Pinout & Package
Package: TSSOP-16 (5.00 mm × 4.40 mm, 0.65 mm pitch). Lead-free, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return for logic and current-sink paths; must be low-impedance |
| SDI (Pin 2) | Serial data input | Accepts 3.3/5-V CMOS-level data; Schmitt-trigger input for noise immunity |
| CLK (Pin 3) | Serial clock input | Rising-edge triggered; min pulse width 20 ns; supports up to 30 MHz |
| LE(ED1) (Pin 4) | Latch enable / mode control | Latches shift register to output latch in Normal Mode; selects Special Mode function |
| OUT0–OUT7 (Pins 5–12) | Constant-current sink outputs | Each drives cathode of LED string; rated for 20-V max VLED |
| VDD (Pin 16) | Power supply | 3.0–5.5 V logic and bias supply; decoupling capacitor required near pin |
| R-EXT (Pin 15) | Current-setting reference | Connects external resistor to GND; sets all 8 channels' current simultaneously |
| SDO (Pin 14) | Serial data output | Shifts out error status or configuration data; enables daisy-chaining |
| OE(ED2) (Pin 13) | Output enable / mode select | Active-low output enable; pulse-trigger initiates Special Mode entry |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One R-EXT sets identical 3–120 mA across all 8 channels - simplifies BOM and layout |
| 256-step global current gain | Runtime-adjustable gain (1/12 to 127/128) compensates inter-IC current variation for white balancing |
| Per-channel fault detection | Detects open-load, short-load (TLC5917 only), and overtemperature - each with dedicated status bit |
| 30-MHz daisy-chain interface | Enables high-speed cascading of multiple TLC5917IPWR devices without timing bottlenecks |
| Schmitt-trigger inputs | CLK, SDI, LE(ED1), OE(ED2) tolerate slow-rising/noisy signals - improves system robustness |
Applications
| Video Billboards | Gaming Machine Displays |
|---|---|
|
Use Scenario: High-brightness outdoor LED panels requiring uniform luminance and real-time fault reporting. IC Role / Device Role / Timing Role: Constant-current sink driver with per-pixel open/short detection and thermal shutdown. Use Value: Enables automatic identification of failed LEDs during operation, reducing maintenance downtime and ensuring visual continuity. |
Use Scenario: Animated LED reels and status indicators in casino gaming cabinets with strict EMI and reliability requirements. IC Role / Device Role / Timing Role: Serial-controlled LED driver with 30-MHz update rate and integrated overtemperature protection. Use Value: Supports rapid animation sequences while preventing thermal runaway in enclosed cabinet environments. |
| White Goods UI Panels | Automotive Interior Lighting |
|
Use Scenario: Appliance control panels (ovens, refrigerators) needing consistent LED brightness across temperature ranges. IC Role / Device Role / Timing Role: Precision current sink with ±3% inter-channel matching and thermal derating feedback. Use Value: Maintains color and intensity uniformity despite ambient temperature swings from 0°C to 70°C. |
Use Scenario: Dashboard backlighting and ambient lighting modules requiring AEC-Q100-aligned fault coverage. IC Role / Device Role / Timing Role: LED driver with open/short detection and overtemperature shutdown for functional safety monitoring. Use Value: Provides diagnostic data via SDO to microcontroller for ASIL-B–aligned lighting health reporting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar constant-current LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5916IPWR | Lacks short-circuit detection; otherwise identical pinout, current range, and interface | Not suitable where LED short-to-VLED faults must be detected (e.g., automotive interior) | Select TLC5916IPWR only when cost sensitivity outweighs need for short-circuit diagnostics |
| MAX7219CWG+ | Integrated SPI interface, on-chip decoding, 8×8 matrix support; no R-EXT current setting | Designed for 7-segment/matrix displays, not general-purpose constant-current sinking | Choose MAX7219CWG+ for alphanumeric displays with minimal MCU overhead; not a drop-in replacement |
Compared with TLC5917IPWR, the TLC5916IPWR omits short-circuit detection but retains identical current accuracy and cascade capability, while the MAX7219CWG+ trades programmable current flexibility for integrated display decoding - making it unsuitable for high-VF or custom LED topology applications.
Availability
TLC5917IPWR is available at Aetrix Electronics and suitable for video billboards, gaming machine displays, and white goods UI panels requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TLC5917IPWR 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 power management and LED driver innovation.
The TLC591x product line was engineered specifically for high-reliability LED display and signage applications demanding precise current regulation, fault visibility, and daisy-chain scalability - not general-purpose switching or logic functions.
FAQ
What is the maximum output voltage rating for TLC5917IPWR?
The TLC5917IPWR supports up to 20 V at its OUT0–OUT7 pins, enabling direct drive of multi-LED strings or high-forward-voltage LEDs without external voltage boosting. This rating is specified under absolute maximum conditions and applies regardless of output current level, provided thermal limits are observed.
How does TLC5917IPWR differ from TLC5916IPWR in fault detection?
The TLC5917IPWR adds short-circuit detection per channel - using VOUT,TTh (2.5–3.1 V) and VOUT,RTh (2.2 V) thresholds - which the TLC5916IPWR lacks. Both share open-load and overtemperature detection, but only TLC5917IPWR reports short-to-VLED faults in its 8-bit error status register accessed via SDO.
Can TLC5917IPWR be used in cascaded configurations?
Yes, the TLC5917IPWR supports daisy-chaining via SDI-to-SDO connections across multiple devices. Its 30-MHz clock tolerance and synchronous SDO timing allow reliable high-speed cascading for large LED arrays - with each device's error status readable in sequence during Special Mode.
What is the role of R-EXT in TLC5917IPWR operation?
R-EXT sets the reference current for all eight output channels. Connected between R-EXT (Pin 15) and GND, its value determines the full-scale sink current (3–120 mA) using TI's defined formula. Changing R-EXT adjusts brightness uniformly across all channels without firmware changes.
Does TLC5917IPWR require external pull-up or pull-down resistors on control pins?
No - LE(ED1) has an internal pulldown and OE(ED2) has an internal pullup, eliminating need for external biasing. However, series termination (e.g., 33 Ω) on CLK and SDI is recommended for high-speed layouts to suppress ringing, especially above 10 MHz.
TLC5917IPWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-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:
- 8
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 20V
- Current - Output / Channel:
- 120mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-TSSOP
TLC5917IPWR FAQ
1.How can I place an order for TLC5917IPWR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5917IPWR 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 TLC5917IPWR reliable?
The price and inventory of TLC5917IPWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5917IPWR is usually 5 days.
3.What payment methods are accepted for TLC5917IPWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5917IPWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5917IPWR?
TLC5917IPWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5917IPWR 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 TLC5917IPWR?
For technical support, including TLC5917IPWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5917IPWR requirements.
6.How does Aetrix verify that TLC5917IPWR is sourced from the original manufacturer or authorized distributors?
All TLC5917IPWR 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 TLC5917IPWR meets industry standards.
7.What is the process for return or replacement of TLC5917IPWR?
All TLC5917IPWR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5917IPWR, 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 TLC5917IPWR part is unused and in its original packaging.
Return procedure for TLC5917IPWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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