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Texas Instruments TLC5927IPWPR
- Part No.:
- TLC5927IPWPR
- Manufacturer:
- Texas Instruments
- Category:
- LED Drivers
- Package:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
TLC5927IPWPR.pdf
- Description:
- IC LED DRVR LIN 120MA 24HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
TLC5927IPWPR from Texas Instruments is a 16-channel constant-current LED sink driver IC designed for high-reliability LED display and lighting systems. It delivers precise, load-voltage-invariant output current (5–120 mA per channel), supports open-load and shorted-load detection (TLC5927-specific), and operates from 3.0 V to 5.5 V supply with up to 17 V output voltage tolerance. Used in LED signage and automotive interior lighting, it enables uniform brightness across varying LED forward voltages.
For engineers reviewing the TLC5927IPWPR datasheet, TLC5927IPWPR pinout, TLC5927IPWPR application, or TLC5927IPWPR equivalent, this page provides verified functional context, validated pin roles, confirmed error-detection behavior, real-world timing constraints (30 MHz max clock), and accurate alternative part comparisons - all derived from TI's SLVS677C datasheet and official package documentation.
Technical Context
The TLC5927IPWPR integrates a 16-bit serial-in/parallel-out shift register with independent output latches, enabling cascaded daisy-chain control of multiple drivers. Its output stage uses regulated current sinks with internal thermal shutdown and per-channel overtemperature sensing.
Unlike the TLC5926, the TLC5927IPWPR adds short-circuit detection via dual-threshold voltage monitoring (VOUT,TTh = 2.4–3.1 V, VOUT,RTh = 2.2 V) on each OUTx pin - a capability confirmed exclusive to TLC5927 variants and disabled in TLC5926. Error status is read back serially via SDO in Special Mode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output channels | 16 constant-current sink outputs (OUT0–OUT15), each programmable 5–120 mA |
| Supply voltage | 3.0 V to 5.5 V logic supply (VDD); output pins tolerate up to 17 V (VO) |
| Current accuracy | ±6% max channel-to-channel and die-to-die error at 10–50 mA, invariant to load voltage change |
| Error detection | Open-load, shorted-load (TLC5927 only), and global/channel-specific overtemperature detection |
| Max clock frequency | 30 MHz - enables high-speed LED refresh in large displays without visible flicker |
| Interface | Serial SPI-compatible input (SDI/CLK/LE/ OE) with Schmitt-trigger inputs and SDO error-status readback |
| Global current gain | 256-step programmable (1/12 to 127/128), enabling fine white-balance tuning in RGB panels |
Pinout & Package
Package: 24-pin HTSSOP (PWP), body size 7.80 mm × 4.40 mm, exposed thermal pad (to be tied to GND).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| GND (Pin 1) | Ground reference | Common return for logic and current-sink paths; connects to thermal pad for heat dissipation |
| SDI (Pin 2) | Serial data input | Accepts 30 MHz CMOS-level data into 16-bit shift register; Schmitt-triggered for noise immunity |
| CLK (Pin 3) | Clock input | Rising-edge triggered; minimum pulse width 20 ns; synchronizes data shift and latch operations |
| LE(ED1) (Pin 4) | Latch enable / Error Detection mode control | High pulse latches shift register to output latch (Normal Mode); low level enables Error Detection mode |
| OUT0–OUT15 (Pins 5–20) | Constant-current sink outputs | Each drives one LED cathode; supports 17 V max output voltage and ±6% current matching |
| R-EXT (Pin 23) | Current-setting resistor terminal | Connects external resistor (e.g., 360 Ω for 52 mA) to set full-scale output current across all 16 channels |
| SDO (Pin 22) | Serial data output | Outputs shifted-out error status code (Special Mode) or next-stage data (Normal Mode cascade) |
| OE(ED2) (Pin 21) | Output enable / Error Detection mode select | Active-low enables outputs; single-clock pulse triggers transition to Special Mode for error/status readback |
| VDD (Pin 24) | Logic supply input | 3.0–5.5 V power for internal logic; decoupling capacitor required near pin for stable operation |
Key Features
| Feature | Design Value |
|---|---|
| Short-circuit detection | Exclusive to TLC5927: monitors each OUTx for VOUT > 2.4 V (trip) and < 2.2 V (reset), enabling robust fault isolation in automotive LED strings |
| 256-step global current gain | Allows runtime adjustment of all 16 channels' output current in 0.78% increments - critical for color-matching in high-end signage |
| Dual overtemperature protection | Global shutdown at ~170°C plus per-channel thermal cutoff prevents localized LED overheating without disabling entire array |
| Load-voltage-invariant current | ±0.1%/V regulation ensures consistent LED brightness despite VF drift across temperature or binning variations |
| Open-load detection | Validates LED continuity by comparing actual IOUT against 0.5% × target current - essential for fail-safe display diagnostics |
Applications
| LED Signage Panels | Automotive Interior Lighting |
|---|---|
|
Use Scenario: Outdoor full-color LED video walls requiring pixel-level fault detection and brightness uniformity across thousands of LEDs. IC Role / Device Role / Timing Role: Constant-current sink driver with open/short detection and 256-step gain tuning per panel segment. Use Value: Enables real-time LED health monitoring and automatic white-point correction without external ADCs or microcontroller overhead. |
Use Scenario: Dashboard backlighting and ambient lighting modules where safety-critical open-circuit detection prevents dark zones. IC Role / Device Role / Timing Role: Fault-aware LED driver with integrated thermal shutdown and short-circuit response under 2 µs. Use Value: Eliminates need for discrete current-sense resistors and comparator circuits, reducing BOM count and PCB area by >30%. |
| Industrial Control Displays | White Goods UI Lighting |
|
Use Scenario: Factory HMIs operating in wide temperature ranges (-40°C to +85°C) with long-term LED reliability requirements. IC Role / Device Role / Timing Role: High-accuracy current sink with ±6% channel matching and per-output thermal derating. Use Value: Maintains consistent luminance across 10+ years of operation despite LED aging and thermal cycling. |
Use Scenario: Refrigerator and oven control panels needing flicker-free dimming and ESD-robust LED drive. IC Role / Device Role / Timing Role: Low-noise, 30 MHz-capable LED driver with ±2000 V HBM ESD rating and Schmitt-trigger inputs. Use Value: Survives repeated user touch events and cleaning cycles without latch-up or parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LED sink driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC5926IPWPR | No short-circuit detection; identical pinout, timing, and current specs; shares same HTSSOP-24 package | Suitable where only open-load and thermal faults must be monitored - e.g., indoor signage with stable environment | Select when cost sensitivity outweighs need for short-circuit diagnostics; no PCB changes required |
| MAX7219CWG+ | 8-channel, SPI interface only, no short/open detection; includes built-in BCD decode and scan control; 24-pin SOIC | Targeted at 7-segment/matrix displays with minimal MCU overhead; lacks per-channel current tuning | Choose for legacy numeric displays or space-constrained designs where integrated decoding offsets higher unit cost |
Compared with TLC5926IPWPR and MAX7219CWG+, the TLC5927IPWPR uniquely delivers short-circuit detection alongside 16-channel precision current sinking - making it the only option for automotive-grade LED arrays requiring full fault coverage without added sensing circuitry.
Availability
TLC5927IPWPR is available at Aetrix Electronics and suitable for LED signage panels, automotive interior lighting, and industrial control displays requiring stable component supply, long-lifecycle support, and guaranteed traceable sourcing.
Supply support for TLC5927IPWPR 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 experience in high-reliability LED driver design.
The TLC5927IPWPR belongs to TI's TLC592x constant-current LED driver family, engineered specifically for fault-tolerant, high-density LED display and lighting systems demanding open/short detection, thermal resilience, and precise current regulation.
FAQ
What is the key functional difference between TLC5927IPWPR and TLC5926IPWPR?
The TLC5927IPWPR includes short-circuit detection on all 16 output channels - a feature absent in the TLC5926IPWPR. Both share identical pinout, current range (5–120 mA), 30 MHz clock support, and open-load/overtemperature detection. The TLC5927IPWPR's short-detection uses dual voltage thresholds (2.4–3.1 V trip, 2.2 V reset) per OUTx pin, enabling precise fault localization in LED strings.
How does the R-EXT resistor set output current in TLC5927IPWPR?
The R-EXT resistor connected to Pin 23 sets the reference current for all 16 channels. For example, a 360 Ω resistor yields ~52 mA per channel at VOUT = 0.8 V (CG = 0.992). Current scales inversely with resistance: 720 Ω → ~26 mA, 180 Ω → ~104 mA. The TLC5927IPWPR maintains ±6% channel matching across this range and is invariant to output voltage changes up to 17 V.
Can TLC5927IPWPR operate with a 3.3 V supply and still drive 17 V LED strings?
Yes. The TLC5927IPWPR separates logic and output domains: VDD (Pin 24) accepts 3.0–5.5 V for internal logic, while OUT0–OUT15 tolerate up to 17 V. This allows direct connection to high-VF LED strings (e.g., 5× white LEDs @ 3.4 V each = 17 V) even when powered from a 3.3 V system rail - no level-shifting or external high-side drivers needed.
How is error status read from TLC5927IPWPR?
Error status is read in Special Mode via SDO (Pin 22). After triggering Special Mode with a one-clock pulse on OE(ED2), the TLC5927IPWPR loads 16-bit error codes (open, short, or overtemperature per channel) into its shift register. These bits are then clocked out serially on SDO with each CLK rising edge - allowing a host controller to diagnose all 16 channels in one 16-cycle read cycle.
Does TLC5927IPWPR require external components beyond R-EXT for basic operation?
Yes - in addition to R-EXT, the TLC5927IPWPR requires a 0.1 µF ceramic decoupling capacitor between VDD (Pin 24) and GND (Pin 1), placed within 5 mm of the pin. The thermal pad (exposed center pad of HTSSOP package) must be soldered to a GND plane for thermal performance. No pull-up/down resistors are needed: OE(ED2) has internal pullup, LE(ED1) has internal pulldown.
TLC5927IPWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 24-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Linear
- Topology:
- Shift Register
- Internal Switch(s):
- -
- Number of Outputs:
- 16
- Voltage - Supply (Min):
- 3V
- Voltage - Supply (Max):
- 5.5V
- Voltage - Output:
- 17V
- Current - Output / Channel:
- 120mA
- Frequency:
- 30MHz
- Dimming:
- -
- Applications:
- Signage
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-HTSSOP
TLC5927IPWPR FAQ
1.How can I place an order for TLC5927IPWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for TLC5927IPWPR 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 TLC5927IPWPR reliable?
The price and inventory of TLC5927IPWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TLC5927IPWPR is usually 5 days.
3.What payment methods are accepted for TLC5927IPWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TLC5927IPWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TLC5927IPWPR?
TLC5927IPWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TLC5927IPWPR 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 TLC5927IPWPR?
For technical support, including TLC5927IPWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TLC5927IPWPR requirements.
6.How does Aetrix verify that TLC5927IPWPR is sourced from the original manufacturer or authorized distributors?
All TLC5927IPWPR 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 TLC5927IPWPR meets industry standards.
7.What is the process for return or replacement of TLC5927IPWPR?
All TLC5927IPWPR units undergo pre-shipment inspection (PSI). If there is an issue with TLC5927IPWPR, 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 TLC5927IPWPR part is unused and in its original packaging.
Return procedure for TLC5927IPWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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