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Texas Instruments TLC5917IPWRG4
- Part No.:
- TLC5917IPWRG4
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5917IPWRG4.pdf
- Description:
- IC LED DRVR LINEAR 120MA 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,988
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Product details
Overview
TLC5917IPWRG4 from Texas Instruments is an 8-channel constant-current LED sink driver IC designed for precision LED current control in display and signage systems. It delivers 3–120 mA per channel with ±3% inter-channel current matching, supports 3.0–5.5 V supply, and features integrated open-load, short-load (TLC5917 only), and overtemperature detection - enabling reliable operation in LED video panels and industrial displays.
For engineers reviewing the TLC5917IPWRG4 datasheet, TLC5917IPWRG4 pinout, TLC5917IPWRG4 application, or TLC5917IPWRG4 equivalent, key selection considerations include its 30-MHz serial interface, error-detection mode via OE(ED2)/LE(ED1), R-EXT–based current programming, and SOIC-16 package compatibility with cascaded LED driver architectures.
Technical Context
The TLC5917IPWRG4 implements an 8-bit shift register with parallel output latches and eight independent constant-current sinks. Its dual-mode operation-Normal Mode for data shifting/latching and Special Mode for error status readback or 256-step global current gain adjustment-is controlled by pulse-width–sensitive transitions on OE(ED2) and level-sensitive logic on LE(ED1).
Each output channel integrates dedicated overtemperature sensing plus open-load detection (triggered when IOUT < 0.5×IOUT,target). The TLC5917 variant uniquely adds short-circuit detection using voltage thresholds (VOUT,TTh = 2.5–3.1 V, VOUT,RTh = 2.2 V), distinguishing it from the TLC5916. All error status bits are serially readable via SDO during Special Mode.
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 inter-channel mismatch at TJ = 25°C |
| Max LED voltage | 20 V - supports multi-LED strings or high-VF LEDs per channel |
| Serial clock frequency | 30 MHz - enables fast update rates for high-refresh LED panels |
| Error detection | Open-load, short-load (TLC5917 only), and per-channel/global overtemperature |
| Supply voltage | 3.0 V to 5.5 V - compatible with both 3.3-V and 5-V controller systems |
Pinout & Package
Package: SOIC-16 (9.90 mm × 3.91 mm, body size nominal). Lead finish: NiPdAu (G4 suffix indicates green, lead-free, RoHS-compliant packaging).
| 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) | Data latch / 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 LED cathode; rated for 20 V max VLED; thermal shutdown per channel |
| 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 in Special Mode; cascades to next device |
| OE(ED2) (Pin 13) | Output enable / mode trigger | Active-low output control; one-clock pulse initiates Special Mode entry |
Key Features
| Feature | Design Value |
|---|---|
| Single-resistor current programming | One R-EXT sets identical 3–120 mA per channel - simplifies BOM and layout vs per-channel resistors |
| 256-step global current gain | Runtime-adjustable gain (1/12 to 127/128) compensates inter-IC current variation to <1% skew |
| Integrated fault detection | Detects open-load, short-load (TLC5917 only), and per-channel/global overtemperature - no external sense circuitry needed |
| 30-MHz serial interface | Enables rapid refresh of 8-channel state in <270 ns - critical for flicker-free video billboards |
| Cascadable architecture | SDI/SDO daisy-chain supports unlimited channel expansion with single controller interface |
Applications
| LED Video Billboards | Industrial Control Panels |
|---|---|
|
Use Scenario: High-brightness outdoor LED matrix displays requiring uniform luminance across thousands of pixels. IC Role / Device Role / Timing Role: Constant-current sink driver for individual LED modules; synchronized via 30-MHz CLK for frame-rate consistency. Use Value: ±3% inter-channel current matching ensures pixel-to-pixel brightness uniformity; open/short detection prevents localized failures from propagating. |
Use Scenario: Operator interface panels in factory automation with status indicators, warning lights, and segmented displays. IC Role / Device Role / Timing Role: LED driver with built-in diagnostics for safety-critical status feedback; operates from 24-V system via local 5-V rail. Use Value: Per-channel overtemperature shutdown protects against LED overheating in enclosed enclosures; error status readback enables predictive maintenance. |
| Gaming Machine Displays | White Goods Indicator Panels |
|
Use Scenario: Dynamic lighting effects and animated icons in slot machines and arcade cabinets requiring rapid LED updates. IC Role / Device Role / Timing Role: Serial-controlled sink driver enabling real-time intensity modulation via 256-step gain control. Use Value: 30-MHz clock supports sub-millisecond frame updates; Schmitt-trigger inputs reject EMI in electrically noisy gaming environments. |
Use Scenario: Appliance status indicators (e.g., washing machine cycle progress, oven temperature) needing long-term reliability and low power. IC Role / Device Role / Timing Role: Low-power LED driver with 3–20 mA programmability and thermal protection for sealed plastic housings. Use Value: R-EXT–based current scaling allows one BOM part to drive diverse LED types; 125°C operating range suits hot appliance interiors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5916IPWR | Lacks short-circuit detection; identical pinout, current range, and interface | Suitable where only open-load/thermal faults require monitoring (e.g., indoor signage) | Select TLC5916IPWR if short-circuit detection is unnecessary and cost optimization is prioritized |
| MAX6966ATL+T | 16-channel, I²C interface, ±2% current accuracy, no built-in short-circuit detection | Better suited for space-constrained designs needing higher channel density and I²C simplicity | Choose MAX6966ATL+T when expanding beyond 8 channels or integrating into I²C-based controller ecosystems |
Compared with TLC5917IPWRG4, TLC5916IPWR omits short-circuit detection but shares identical footprint and programming; MAX6966ATL+T offers double the channels and I²C control at the cost of losing serial-cascade scalability and short-fault coverage.
Availability
TLC5917IPWRG4 is available at Aetrix Electronics and suitable for LED video billboards, industrial HMI panels, gaming machine displays, and white goods indicator systems requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for TLC5917IPWRG4 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 expertise in precision power and signal chain solutions.
The TLC591x product line was engineered specifically for high-reliability LED display and lighting systems demanding accurate current regulation, robust fault diagnostics, and scalable serial architecture - targeting video panels, signage, and industrial UIs.
FAQ
What is the maximum output voltage rating for TLC5917IPWRG4?
The TLC5917IPWRG4 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 translation. This rating is absolute maximum and applies regardless of output current setting or ambient temperature, provided thermal limits are observed per the datasheet's RθJA values for SOIC-16.
How does short-circuit detection work on TLC5917IPWRG4?
The TLC5917IPWRG4 detects short-circuit conditions by monitoring output voltage: if VOUT ≥ 2.5–3.1 V (trigger threshold), a short is flagged; if VOUT ≤ 2.2 V (return threshold), the fault clears. This detection is active only when the channel is enabled (OE low and latch set), and status is reported in the 8-bit error register readable via SDO in Special Mode.
Can TLC5917IPWRG4 be used in cascaded configurations?
Yes - the TLC5917IPWRG4 supports seamless daisy-chaining: SDI of the first device receives controller data, SDO feeds SDI of the next, and so on. All devices share CLK, LE(ED1), and OE(ED2). The 30-MHz clock and low propagation delay (<95 ns) ensure timing integrity across large chains, making TLC5917IPWRG4 ideal for extended LED video walls.
What is the purpose of the R-EXT pin on TLC5917IPWRG4?
R-EXT (Pin 15) connects an external resistor to GND to set the reference current for all eight output channels. The resulting sink current per channel is IOUT = 12.5 V / REXT, yielding 3–120 mA over REXT = 104 kΩ to 1.04 kΩ. This single-point adjustment eliminates per-channel calibration and ensures matched current across outputs.
Does TLC5917IPWRG4 support programmable current gain?
Yes - the TLC5917IPWRG4 includes a 256-step programmable global current gain register. A configuration code sent via SDI and latched by LE(ED1) in Special Mode adjusts the effective R-EXT reference voltage, scaling output current from 1/12× to 127/128× full scale. This enables fine white-balancing in RGB LED arrays and compensation for inter-IC current variation.
TLC5917IPWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TLC5917IPWRG4 FAQ
1.How can I place an order for TLC5917IPWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5917IPWRG4 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 TLC5917IPWRG4 reliable?
The price and inventory of TLC5917IPWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5917IPWRG4 is usually 5 days.
3.What payment methods are accepted for TLC5917IPWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5917IPWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5917IPWRG4?
TLC5917IPWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5917IPWRG4 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 TLC5917IPWRG4?
For technical support, including TLC5917IPWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5917IPWRG4 requirements.
6.How does Aetrix verify that TLC5917IPWRG4 is sourced from the original manufacturer or authorized distributors?
All TLC5917IPWRG4 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 TLC5917IPWRG4 meets industry standards.
7.What is the process for return or replacement of TLC5917IPWRG4?
All TLC5917IPWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TLC5917IPWRG4, 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 TLC5917IPWRG4 part is unused and in its original packaging.
Return procedure for TLC5917IPWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TLC5917IPWRG4 Tags
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BCR420UE6433HTMA1
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BCR420UFD-7
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