TLC6946 Series

16-channel, 16-bit ES-PWM constant-current LED driver with 32 multiplexing

Catalog

16-channel, 16-bit ES-PWM constant-current LED driver with 32 multiplexing

Part	Internal Switch(s)	Dimming	Mounting Type	Type	Package / Case	Package / Case [custom]	Voltage - Supply (Min) [Min]	Number of Outputs	Operating Temperature [Max]	Operating Temperature [Min]	Topology	Voltage - Supply (Max)	Supplier Device Package
Texas Instruments TLC6946DBQR			Surface Mount	Linear	24-SSOP	0.154 " 3.9 mm	3 V	16	85 °C	-40 °C	Constant Current	5.5 V	24-SSOP
Texas Instruments TLC6946RGER			Surface Mount	Linear	24-VFQFN Exposed Pad		3 V	16	85 °C	-40 °C	Constant Current	5.5 V	24-VQFN (4x4)

Catalog

16-channel, 16-bit ES-PWM constant-current LED driver with 32 multiplexing

Key Features

• Power Supply Voltage RangesVCCVoltage Range: 3 V to 5.5 VVLEDVoltage Range: Up to VCC+ 0.3 V16 Constant-Current-Sink Channels0.3 mA to 25 mA (3 V ≤ VCC≤ 5.5 V)Channel Current Deviation: ±1% (typical)Device Current Deviation: ±1% (typical)Low Knee Voltage: 0.3 V (typical) at 10 mA7-Bit (128 Steps) Global Brightness Control (BC)16-Bit (65,536 Steps) Enhanced Spectrum PWM Grayscale ControlBuilt-In Memory Supports 32 Multiplexing for TLC6946 and 48 Multiplexing for TLC6948LED Display Performance EnhancementLow-Grayscale Uniformity ImprovementLow-Grayscale Coupling Issue EliminationGhosting Removal and Caterpillar EliminationHigh-Speed Serial-Data InterfaceData-Shift Clock: 33 MHz (maximum)Grayscale Control Clock: 33 MHz (maximum)Supports Dual-Edge Grayscale ControlDiagnostics and ProtectionLED-Open Detection (LOD)IREF Resistor Short Protection (ISP)Thermal Shutdown (TSD)Smart Power-Save ModePower Supply Voltage RangesVCCVoltage Range: 3 V to 5.5 VVLEDVoltage Range: Up to VCC+ 0.3 V16 Constant-Current-Sink Channels0.3 mA to 25 mA (3 V ≤ VCC≤ 5.5 V)Channel Current Deviation: ±1% (typical)Device Current Deviation: ±1% (typical)Low Knee Voltage: 0.3 V (typical) at 10 mA7-Bit (128 Steps) Global Brightness Control (BC)16-Bit (65,536 Steps) Enhanced Spectrum PWM Grayscale ControlBuilt-In Memory Supports 32 Multiplexing for TLC6946 and 48 Multiplexing for TLC6948LED Display Performance EnhancementLow-Grayscale Uniformity ImprovementLow-Grayscale Coupling Issue EliminationGhosting Removal and Caterpillar EliminationHigh-Speed Serial-Data InterfaceData-Shift Clock: 33 MHz (maximum)Grayscale Control Clock: 33 MHz (maximum)Supports Dual-Edge Grayscale ControlDiagnostics and ProtectionLED-Open Detection (LOD)IREF Resistor Short Protection (ISP)Thermal Shutdown (TSD)Smart Power-Save Mode

Description

In high-density, fine-pitch LED panel applications, the performance demand for multi-channel LED drivers is increasing to achieve high multiplexing, high PWM resolution, and high refresh rates. To meet strict display quality requirements, the LED drivers must have the ability to solve various issues in different LED-matrix application scenarios. The TLC694x device is a 16-channel, constant-current-sink LED driver. Each channel has an individually adjustable 65,536 steps of PWM grayscale control. The maximum constant-current value of all 16 channels is set by a single external resistor with 128 steps of global brightness control from 0.3 mA to 25 mA. The TLC694x device integrates enhanced circuits to solve the various display issues in fine-pitch LED display applications: the low-grayscale uniformity issue, coupling issue, ghosting issue, and caterpillar issue. The TLC694x device features an LED-open detection function, and the error detection results can be read via a serial data interface port. Thermal shutdown and IREF resistor short protection ensure a higher system reliability. The TLC694x device also has an smart power-save mode that sets the total current consumption to 1 mA (typical) when all outputs are off. In high-density, fine-pitch LED panel applications, the performance demand for multi-channel LED drivers is increasing to achieve high multiplexing, high PWM resolution, and high refresh rates. To meet strict display quality requirements, the LED drivers must have the ability to solve various issues in different LED-matrix application scenarios. The TLC694x device is a 16-channel, constant-current-sink LED driver. Each channel has an individually adjustable 65,536 steps of PWM grayscale control. The maximum constant-current value of all 16 channels is set by a single external resistor with 128 steps of global brightness control from 0.3 mA to 25 mA. The TLC694x device integrates enhanced circuits to solve the various display issues in fine-pitch LED display applications: the low-grayscale uniformity issue, coupling issue, ghosting issue, and caterpillar issue. The TLC694x device features an LED-open detection function, and the error detection results can be read via a serial data interface port. Thermal shutdown and IREF resistor short protection ensure a higher system reliability. The TLC694x device also has an smart power-save mode that sets the total current consumption to 1 mA (typical) when all outputs are off.