Specifications
| Type | Description |
|---|---|
| Part Number | TLC5973 |
| Manufacturer | Texas Instruments |
| Product Type | SMD LED |
| Category | LED |
| Component Type | Power_IC |
| Package Case | SOIC-8, body size 4.9 mm x 3.91 mm |
| Number of Output Channels | 3; constant sink current outputs OUT0 to OUT2 |
| Output Current Capability | 2-35 mA per channel; VCC <= 4.0 V |
| Output Current Capability | 2-50 mA per channel; VCC > 4.0 V |
| Grayscale PWM Resolution | 12-bit, 4096 steps; GS control |
| Serial Interface | Single-wire EasySet; SDI/SDO data interface |
| Maximum Data Transfer Rate | 3 Mbps; EasySet serial interface |
| Internal Grayscale Clock Frequency | 12 MHz typ; integrated GS clock oscillator |
| Display Repeat Rate | 2.9 kHz typ; internal 12-MHz GS clock oscillator |
| Supply Voltage Range | 3-6 V; feature summary |
| Maximum OUT Pin Voltage | Up to 21 V; OUT0 to OUT2 |
| Operating Temperature | -40 to 85 °C; operating free-air temperature |
| Package | SOIC-8; D package |
| Absolute Maximum Supply Voltage | -0.3 to 7.0 V; VCC, over operating free-air temperature range |
| Absolute Maximum Input Voltage | -0.3 to VCC + 1.2 V; SDI input |
| Absolute Maximum Output Voltage | -0.3 to 21 V; OUT0 to OUT2 |
| Absolute Maximum SDO Output Voltage | -0.3 to 7.0 V; SDO output |
| Absolute Maximum Output Current | 0-60 mA; OUT0 to OUT2 DC current |
| Operating Junction Temperature | -40 to 150 °C; absolute maximum rating |
| Storage Temperature | -55 to 150 °C; handling rating |
| ESD Rating HBM | -8000 to 8000 V; Human-body model, ANSI/ESDA/JEDEC JS-001, all pins |
| ESD Rating CDM | -2000 to 2000 V; Charged-device model, JEDEC JESD22-C101, all pins |
| Recommended Supply Voltage | 3.0 V min, 5.0 V nom, 5.5 V max; no internal shunt regulator mode |
| Recommended Supply Voltage | 6.0 V max; internal shunt regulator mode |
| Recommended Output Voltage | 21 V max; OUT0 to OUT2 |
| High-Level Input Voltage | 0.7 x VCC min, VCC max; SDI |
| Low-Level Input Voltage | GND min, 0.3 x VCC max; SDI |
| Input Voltage Hysteresis | 0.2 x VCC; SDI |
| High-Level Output Current | -2 mA; SDO |
| Low-Level Output Current | 2 mA; SDO |
| Recommended Output Sink Current | 2-35 mA; OUT0 to OUT2, VCC <= 4.0 V |
| Recommended Output Sink Current | 2-50 mA; OUT0 to OUT2, VCC > 4.0 V |
| Shunt Regulator Sink Current | 20 mA max; VCC |
| Recommended Operating Free-Air Temperature | -40 to 85 °C; TA |
| Recommended Operating Junction Temperature | -40 to 125 °C; TJ |
| Recommended Data Transfer Rate | 100-3000 kHz; SDI, fCLK(SDI) |
| SDI Input Pulse Duration | 60 ns min, 0.5/fCLK max; SDI |
| Pulse Duration High | 14 ns min; SDI |
| Pulse Duration Low | 14 ns min; SDI |
| Hold Time End of Sequence | 3.5/fCLK min, 5.5/fCLK max; SDI rising edge to SDI rising edge, EOS |
| Hold Time Data Latch | 8/fCLK min; SDI rising edge to SDI rising edge, GSLAT |
| Junction-to-Ambient Thermal Resistance | 134.6 °C/W; D SOIC-8 package |
| Junction-to-Case Top Thermal Resistance | 88.6 °C/W; D SOIC-8 package |
| Junction-to-Board Thermal Resistance | 75.3 °C/W; D SOIC-8 package |
| Junction-to-Top Characterization Parameter | 37.7 °C/W; D SOIC-8 package |
| Junction-to-Board Characterization Parameter | 74.8 °C/W; D SOIC-8 package |
| High-Level Output Voltage | VCC - 0.4 V min, VCC max; SDO, IOH = -2 mA |
| Low-Level Output Voltage | 0 V min, 0.4 V max; SDO, IOL = 2 mA |
| Reference Voltage Output | 1.18 V min, 1.20 V typ, 1.23 V max; RIREF = 1.5 kOhm |
| Shunt Regulator Output Voltage | 5.9 V typ; VCC, ICC = 1 mA, SDI = low |
| Supply Current ICC0 | 3 mA typ, 6 mA max; VCC = 3.0-5.5 V, SDI = low, all GSn = FFFh, VOUTn = 1 V, SDO = 15 pF, RIREF = 27 kOhm, IOUTn = 2 mA target |
| Supply Current ICC1 | 4 mA typ, 7 mA max; VCC = 3.0-5.5 V, SDI = low, all GSn = FFFh, VOUTn = 1 V, SDO = 15 pF, RIREF = 3 kOhm, IOUTn = 17 mA target |
| Supply Current ICC2 | 5 mA typ, 8 mA max; VCC = 3.0-5.5 V, SDI = 5 MHz, all GSn = FFFh, VOUTn = 1 V, SDO = 15 pF, RIREF = 3 kOhm, IOUTn = 17 mA target |
| Supply Current ICC3 | 5.5 mA typ, 10 mA max; VCC = 3.0-5.5 V, SDI = 5 MHz, all GSn = FFFh, VOUTn = 1 V, SDO = 15 pF, RIREF = 1.5 kOhm, IOUTn = 34 mA target |
| Constant Output Current | 31 mA min, 34 mA typ, 37 mA max; all OUTn on, VOUTn = 1 V, VOUTfix = 1 V, RIREF = 1.5 kOhm |
| Output Leakage Current | 0.1 uA max; TJ = -40 to 85 °C, GSn = 000h, VOUTn = 21 V |
| Output Leakage Current | 0.2 uA max; TJ = 85 to 125 °C, GSn = 000h, VOUTn = 21 V |
| Constant-Current Error Channel-to-Channel | +/-0.5% typ, +/-3% max; all OUTn on, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kOhm |
| Constant-Current Error Device-to-Device | +/-0.5% typ, +/-6% max; all OUTn on, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kOhm |
| Line Regulation of Constant-Current Output | +/-0.5 %/V typ, +/-1 %/V max; all OUTn on, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kOhm |
| Load Regulation of Constant-Current Output | +/-0.5 %/V typ, +/-1 %/V max; all OUTn on, VOUTn = VOUTfix = 1 V, RIREF = 1.5 kOhm |
| Internal Pull-Down Resistance | 1 MOhm typ; SDI pin |
| SDO Rise Time | 2 ns min, 6 ns typ, 12 ns max; TA = -40 to 85 °C, VCC = 3.0-5.5 V, CL = 15 pF, RL = 110 Ohm, VLED = 5.0 V |
| OUTn Rise Time | 200 ns typ, 400 ns max; OUTn on-to-off, TA = -40 to 85 °C, VCC = 3.0-5.5 V, CL = 15 pF, RL = 110 Ohm, VLED = 5.0 V |
| SDO Fall Time | 2 ns min, 6 ns typ, 12 ns max; TA = -40 to 85 °C, VCC = 3.0-5.5 V, CL = 15 pF, RL = 110 Ohm, VLED = 5.0 V |
| OUTn Fall Time | 200 ns typ, 400 ns max; OUTn off-to-on, TA = -40 to 85 °C, VCC = 3.0-5.5 V, CL = 15 pF, RL = 110 Ohm, VLED = 5.0 V |
| Propagation Delay SDI to SDO | 30 ns typ, 50 ns max; SDI rising edge to SDO rising edge |
| Propagation Delay Between Outputs | 25 ns typ; OUT0 to OUT1 and OUT1 to OUT2, rising or falling transitions |
| Shift Data Output Pulse Duration | 15 ns min, 25 ns typ, 45 ns max; SDO rising edge to SDO falling edge |
| Internal GS Oscillator Frequency | 8 MHz min, 12 MHz typ, 16 MHz max; TA = -40 to 85 °C, VCC = 3.0-5.5 V |
| Datasheet Status | request_only |
Product Overview
The TLC5973 is a Texas Instruments 3-channel PWM LED driver with constant sink current outputs on OUT0, OUT1, and OUT2. Each channel supports 12-bit grayscale PWM control with 4096 steps, using an integrated grayscale clock oscillator specified at 12 MHz typical and 8 MHz to 16 MHz across the listed operating conditions.
The device uses a single-wire EasySet SDI/SDO serial interface with a maximum data transfer rate of 3 Mbps and a recommended SDI transfer range of 100-3000 kHz. The SDO output supports high-level and low-level output current ratings of -2 mA and 2 mA, with propagation delay from SDI to SDO specified at 30 ns typical and 50 ns maximum.
For assembly and thermal evaluation, TLC5973 is offered in the D SOIC-8 package with a 4.9 mm x 3.91 mm body size. Recommended operation covers 3.0 V minimum, 5.0 V nominal, and 5.5 V maximum without internal shunt regulator mode, or up to 6.0 V in internal shunt regulator mode. Applications include three-channel LED PWM dimming, serially controlled LED modules, and LED circuits requiring OUT pin voltage capability up to 21 V.
Key Features
- Three constant sink current outputs, OUT0 through OUT2
- 2-35 mA per channel when VCC <= 4.0 V
- 2-50 mA per channel when VCC > 4.0 V
- 12-bit grayscale PWM control with 4096 steps
- Single-wire EasySet SDI/SDO serial data interface
- EasySet data transfer rate up to 3 Mbps
- Integrated 12 MHz typical grayscale clock oscillator
- 2.9 kHz typical display repeat rate
- OUT0 to OUT2 voltage capability up to 21 V
- SOIC-8 D package, 4.9 mm x 3.91 mm body
Typical Applications
- Three-channel LED PWM control
- RGB LED current sinking
- Serially controlled LED modules
- LED dimming with 4096 steps
- 3 V to 6 V LED systems
- 21 V OUT pin LED circuits
- SOIC-8 LED driver assemblies
Procurement Notes
When requesting a quote for TLC5973, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For LED and optoelectronic sourcing, brightness bin, wavelength or color temperature bin, forward voltage range, viewing angle, moisture sensitivity level and soldering process limits may affect final selection, availability and lead time.
FAQ
How many LED output channels does TLC5973 provide?
TLC5973 provides three constant sink current outputs, identified as OUT0 to OUT2. These outputs are intended for 3-channel PWM LED driver operation with grayscale control.
What output current range is recommended for TLC5973?
The recommended OUT0 to OUT2 sink current range is 2-35 mA when VCC is less than or equal to 4.0 V, and 2-50 mA when VCC is greater than 4.0 V.
What serial interface does the TLC5973 use?
TLC5973 uses a single-wire EasySet serial interface through the SDI/SDO data interface. The maximum EasySet data transfer rate is 3 Mbps, and the recommended SDI transfer range is 100-3000 kHz.
What package is specified for the TLC5973?
The extracted datasheet facts specify the TLC5973 in a D package SOIC-8 case. The listed body size is 4.9 mm x 3.91 mm.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 22, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.