Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Channels | 3 constant-current sinks |
| PWM | 12-bit / 4096-step grayscale |
| Interface | Single-wire EasySet, up to 3 Mbps |
| Current | 2–35 mA/channel at VCC ≤4 V; up to 50 mA above 4 V |
| Output Voltage | Up to 21 V |
| Supply | 3 V to 6 V |
| Cascade | Unlimited-device serial cascading stated |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel |
Product Overview
TLC5973DR targets a single RGB LED cluster or long cascaded strings where wiring count matters. One data wire carries 12-bit values to three constant-current sinks and can be daisy-chained through many devices.
The current ceiling depends on VCC: 50 mA/channel is conditional on VCC above 4 V. A design using 3.3 V should not copy the 50 mA headline.
The 21 V output rating allows series/high-forward-voltage LED arrangements, but the sink voltage/current product determines package heat.
For related devices, see HKEQGOO’s LED Drivers ICs category.
Technical Specifications
| Parameter | Verified Information |
|---|---|
| Manufacturer | Texas Instruments |
| Exact MPN | TLC5973DR |
| Channels | 3 constant-current sinks |
| PWM | 12-bit / 4096-step grayscale |
| Interface | Single-wire EasySet, up to 3 Mbps |
| Current | 2–35 mA/channel at VCC ≤4 V; up to 50 mA above 4 V |
| Output Voltage | Up to 21 V |
| Supply | 3 V to 6 V |
| Cascade | Unlimited-device serial cascading stated |
| Exact Package / Packing | SOIC (D), 8 pins; 2500-piece large reel |
| Manufacturer Status | Active / Production |
| Part Marking | 5973 |
Functional Highlights
Single-wire control minimizes harness traces
EasySet can be attractive in distributed RGB clusters where adding clock/chip-select wires is expensive.
12-bit grayscale supports smoother fades than 8-bit drivers
The benefit is most visible at low brightness, provided LED current matching and optical variation are also controlled.
Design Considerations
- Use the VCC-dependent current limit when choosing R_IREF and LED current.
- Check sink power at the maximum LED supply/output voltage.
- Validate cascade timing/data integrity over the actual physical wiring length.
Product Status and Exact Order Code
Manufacturer status: Active / Production
Texas Instruments lists TLC5973DR as Active / Production; SOIC (D), 8 pins; 2500-piece large tape and reel; −40°C to +125°C; marking 5973.
Related Engineering Resources
Quality & Verification Support
Third-party inspection or testing can be arranged according to customer requirements. Testing fees are borne by the buyer. Additional verification requirements can be discussed before shipment. After an order is placed, physical product, label, packaging, and Date Code photos may be provided where appropriate.
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