Specifications
| Type | Description |
|---|---|
| Part Number | TLC5947 |
| Manufacturer | Texas Instruments |
| Product Type | SMD LED |
| Category | LED |
| Package / Case | HTSSOP-32 DAP 11.00 mm x 6.20 mm; VQFN-32 RHB 5.00 mm x 5.00 mm |
| Number of Output Channels | 24 channels; constant-current sink outputs OUT0 through OUT23 |
| PWM Grayscale Resolution | 12-bit, 4096 steps; per-channel PWM grayscale control |
| Maximum Constant-Current Sink Capability | 30 mA; constant-current sink output capability |
| Recommended Constant Output Sink Current | 2 to 30 mA; OUT0 to OUT23, TA = -40°C to 85°C |
| LED Power-Supply Voltage | Up to 30 V; voltage applied to LED/output side |
| Recommended Output Voltage | 30 V max; voltage applied to OUT0 to OUT23 |
| Supply Voltage | 3.0 to 5.5 V; recommended operating condition |
| Absolute Maximum Supply Voltage | -0.3 to 6.0 V; VCC, over operating free-air temperature range |
| Absolute Maximum Output Current | 38 mA; DC output current, OUT0 to OUT23 |
| Absolute Maximum Output Voltage | -0.3 to 33 V; OUT0 to OUT23 |
| Absolute Maximum Input Voltage | -0.3 to VCC + 0.3 V; SIN, SCLK, XLAT, BLANK |
| Absolute Maximum SOUT Voltage | -0.3 to VCC + 0.3 V; SOUT output voltage |
| Maximum Operating Junction Temperature | 150°C; absolute maximum rating |
| Storage Temperature | -55°C to 150°C; absolute maximum rating |
| Operating Free-Air Temperature | -40°C to 85°C; recommended operating condition |
| Recommended Operating Junction Temperature | -40°C to 125°C; recommended operating condition |
| Channel-to-Channel Current Accuracy | ±2% typ, -4% min, 4% max; all OUTn on, RIREF = 1.6 kΩ, VOUTn = 1 V, VOUTfix = 1 V |
| Device-to-Device Current Accuracy | ±2% typ, -7% min, 7% max; all OUTn on, RIREF = 1.6 kΩ, VOUTn = 1 V, VOUTfix = 1 V |
| Constant Output Current | 27.7 mA min, 30.75 mA typ, 33.8 mA max; all OUTn on, RIREF = 1.6 kΩ, VOUTn = 1 V, VOUTfix = 1 V |
| Ideal Output Current Formula | IOUT(IDEAL) = 41 x 1.20 / RIREF; ideal current calculation using RIREF |
| Reference Voltage Output | 1.16 V min, 1.20 V typ, 1.24 V max; RIREF = 1.6 kΩ |
| Output Leakage Current | 0.1 µA typ; BLANK = high, VOUTn = 30 V, RIREF = 1.6 kΩ, OUT0 to OUT23 |
| Line Regulation | ±1 %/V typ, ±3 %/V max; all OUTn on, RIREF = 1.6 kΩ, VOUTn = 1 V, VOUTfix = 1 V, VCC = 3.0 V to 5.5 V |
| Load Regulation | ±2 %/V typ, ±6 %/V max; all OUTn on, RIREF = 1.6 kΩ, VOUTn = 1 V to 3 V, VOUTfix = 1 V |
| Standalone Data Shift Clock Frequency | 30 MHz max; SCLK, standalone operation |
| Cascade Data Shift Clock Frequency | 15 MHz max; SCLK duty = 50%, cascade operation |
| Internal Oscillator Frequency | 4 MHz; internal oscillator |
| SCLK High-Level Pulse Width | 12 ns min; recommended AC operating condition |
| SCLK Low-Level Pulse Width | 10 ns min; recommended AC operating condition |
| XLAT and BLANK High-Level Pulse Width | 30 ns min; recommended AC operating condition |
| SIN to SCLK Rising Setup Time | 5 ns min; SIN to SCLK rising edge |
| XLAT Rising to SCLK Rising Setup Time | 100 ns min; XLAT rising edge to SCLK rising edge |
| XLAT Rising to BLANK Falling Setup Time | 30 ns min; XLAT rising edge to BLANK falling edge |
| SIN to SCLK Rising Hold Time | 3 ns min; SIN to SCLK rising edge |
| XLAT Rising to SCLK Rising Hold Time | 10 ns min; XLAT rising edge to SCLK rising edge |
| High-Level Input Voltage | 0.7 x VCC to VCC; recommended operating condition |
| Low-Level Input Voltage | GND to 0.3 x VCC; recommended operating condition |
| SOUT High-Level Output Current | -3 mA; recommended operating condition |
| SOUT Low-Level Output Current | 3 mA; recommended operating condition |
| SOUT High-Level Output Voltage | VCC - 0.4 V min, VCC typ; IOH = -3 mA at SOUT |
| SOUT Low-Level Output Voltage | 0.4 V max; IOL = 3 mA at SOUT |
| Input Current | -1 to 1 µA; VIN = VCC or GND at SIN, XLAT, and BLANK |
| Supply Current ICC1 | 0.5 mA typ, 3 mA max; SIN/SCLK/XLAT = low, BLANK = high, VOUTn = 1 V, RIREF = 24 kΩ |
| Supply Current ICC2 | 1 mA typ, 6 mA max; SIN/SCLK/XLAT = low, BLANK = high, VOUTn = 1 V, RIREF = 3.3 kΩ |
| Supply Current ICC3 | 15 mA typ, 45 mA max; SIN/SCLK/XLAT = low, BLANK = low, VOUTn = 1 V, RIREF = 3.3 kΩ, GSn = FFFh |
| Supply Current ICC4 | 30 mA typ, 90 mA max; SIN/SCLK/XLAT = low, BLANK = low, VOUTn = 1 V, RIREF = 1.6 kΩ, GSn = FFFh |
| Thermal Shutdown Threshold | 150°C min, 162°C typ, 175°C max; junction temperature, specified by design |
| Thermal Shutdown Hysteresis | 5°C min, 10°C typ, 20°C max; junction temperature, specified by design |
| HBM ESD Rating | ±2500 V; human body model per ANSI/ESDA/JEDEC JS-001, all pins |
| CDM ESD Rating | ±500 V; charged device model per JEDEC JESD22-C101, all pins |
| Thermal Resistance Junction-to-Ambient | 32.8°C/W; DAP 32-pin package |
| Thermal Resistance Junction-to-Case Top | 17.1°C/W; DAP 32-pin package |
| Thermal Resistance Junction-to-Board | 17.9°C/W; DAP 32-pin package |
| Thermal Resistance Junction-to-Case Bottom | 1.3°C/W; DAP 32-pin package |
| Datasheet Status | request_only |
Product Overview
The TLC5947 is a Texas Instruments 24-channel PWM LED driver for LED applications. Its OUT0 through OUT23 pins are constant-current sink outputs, and each channel supports 12-bit grayscale PWM control with 4096 steps. The device includes an internal 4 MHz oscillator and supports serial data shifting through SIN, SCLK, XLAT, BLANK, and SOUT interface signals.
Electrical operation is defined around a 3.0 to 5.5 V recommended supply range and up to 30 V on the LED/output side. Recommended constant output sink current is 2 to 30 mA over -40°C to 85°C free-air temperature. With RIREF = 1.6 kΩ and VOUTn = 1 V, constant output current is specified as 27.7 mA min, 30.75 mA typ, and 33.8 mA max.
Package options are HTSSOP-32 DAP 11.00 mm x 6.20 mm and VQFN-32 RHB 5.00 mm x 5.00 mm. Thermal data for the 32-pin DAP package includes 32.8°C/W junction-to-ambient resistance and 1.3°C/W junction-to-case bottom resistance, supporting thermal review during board assembly and LED-current design.
Key Features
- 24 constant-current sink outputs, OUT0 through OUT23
- 12-bit grayscale PWM control with 4096 steps
- 30 mA maximum constant-current sink capability
- 2 to 30 mA recommended output sink current
- Up to 30 V LED/output-side voltage
- 3.0 to 5.5 V recommended supply range
- 30 MHz maximum standalone SCLK frequency
- 15 MHz maximum cascade SCLK frequency
- 4 MHz internal oscillator
- Thermal shutdown threshold of 162°C typical
Typical Applications
- 24-channel LED PWM control
- Constant-current LED sink outputs
- Multi-channel grayscale LED dimming
- Cascaded serial LED driver designs
- 30 V LED output-side designs
- 3.0 to 5.5 V logic systems
- Thermally reviewed DAP package assemblies
Procurement Notes
When requesting a quote for TLC5947, 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 the TLC5947 provide?
The TLC5947 provides 24 constant-current sink output channels, labeled OUT0 through OUT23. Each channel is intended for LED driver use and supports per-channel 12-bit PWM grayscale control.
What PWM resolution is available on each TLC5947 channel?
Each TLC5947 output channel supports 12-bit PWM grayscale control, corresponding to 4096 steps. This applies per channel across the OUT0 through OUT23 constant-current sink outputs.
What supply and output voltages are recommended for TLC5947 operation?
The recommended device supply voltage is 3.0 to 5.5 V. The LED/output side supports up to 30 V, and the recommended voltage applied to OUT0 through OUT23 is 30 V maximum.
What output current range is recommended for the TLC5947?
The recommended constant output sink current range is 2 to 30 mA for OUT0 through OUT23 across TA = -40°C to 85°C. The maximum constant-current sink capability is listed as 30 mA.
Which package options are listed for the TLC5947?
The listed package options are HTSSOP-32 DAP measuring 11.00 mm x 6.20 mm and VQFN-32 RHB measuring 5.00 mm x 5.00 mm. Thermal resistance data is provided for the DAP 32-pin package.
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.