TLC5954 Series

48ch LED driver with global brightness control, LED open/Short Detection and power-Save Mode

Catalog

48ch LED driver with global brightness control, LED open/Short Detection and power-Save Mode

Part	Topology	Type	Number of Outputs	Voltage - Supply (Min) [Min]	Voltage - Supply (Max) [Max]	Package / Case	Mounting Type	Applications	Voltage - Output	Current - Output / Channel	Supplier Device Package	Operating Temperature [Max]	Operating Temperature [Min]	Internal Switch(s)
Texas Instruments TLC5954RTQT	Shift Register	Linear	48	3 V	3.6 V	56-VFQFN Exposed Pad	Surface Mount	Signage	10 V	24.4 mA 34.9 mA	56-QFN (8x8)	85 °C	-40 °C
Texas Instruments TLC5954RTQR	Shift Register	Linear	48	3 V	3.6 V	56-VFQFN Exposed Pad	Surface Mount	Signage	10 V	24.4 mA 34.9 mA	56-QFN (8x8)	85 °C	-40 °C

Catalog

48ch LED driver with global brightness control, LED open/Short Detection and power-Save Mode

Key Features

• 48 Constant-Current Sink Output Channels with On or Off ControlCurrent Capability:34.9 mA for 32 Channels24.4 mA 16ChannelsNo External Resistor for Current SettingMaximum Current Control (MC): 3 Bits (8 Steps)Global Brightness Control (BC) for Each Color Group: 7 Bits (128 Steps), Three GroupsLED Power-Supply Voltage: Up to 10 VVCC = 3.0 V to 3.6 VConstant-Current Accuracy:Channel-to-Channel = ±1% (typ), ±3% (max)Device-to-Device = ±2% (typ), ±4% (max)Data Transfer Rate: 30 MHzBLANK Pulse Duration: 40 ns (min)LED Open Detection (LOD)LED Short Detection (LSD)Power-Save Mode (PSM): 7-µA Consumption, High-Speed RecoveryUndervoltage Lockout Sets Default DataDelayed Switching Minimizes Inrush CurrentOperating Temperature: –40°C to +85°C48 Constant-Current Sink Output Channels with On or Off ControlCurrent Capability:34.9 mA for 32 Channels24.4 mA 16ChannelsNo External Resistor for Current SettingMaximum Current Control (MC): 3 Bits (8 Steps)Global Brightness Control (BC) for Each Color Group: 7 Bits (128 Steps), Three GroupsLED Power-Supply Voltage: Up to 10 VVCC = 3.0 V to 3.6 VConstant-Current Accuracy:Channel-to-Channel = ±1% (typ), ±3% (max)Device-to-Device = ±2% (typ), ±4% (max)Data Transfer Rate: 30 MHzBLANK Pulse Duration: 40 ns (min)LED Open Detection (LOD)LED Short Detection (LSD)Power-Save Mode (PSM): 7-µA Consumption, High-Speed RecoveryUndervoltage Lockout Sets Default DataDelayed Switching Minimizes Inrush CurrentOperating Temperature: –40°C to +85°C

Description

The TLC5954 is a 48-channel, constant-current sink LED driver. Each channel can be turned on or off by writing data to an internal register. The output channels (OUTX) are grouped into three groups of 16 channels. Each channel group (R, G, and B) has a 128-step global brightness control (BC) function. The maximum current value of all 48 channels can be set with an 8-step maximum current control (MC) function. The device has two error flags: LED open detection (LOD) and LED short detection (LSD). The error flags can be read via a serial interface port. The device also has a power-save mode that sets the total current consumption to 7 µA (typ) when all outputs are off. The TLC5954 is a 48-channel, constant-current sink LED driver. Each channel can be turned on or off by writing data to an internal register. The output channels (OUTX) are grouped into three groups of 16 channels. Each channel group (R, G, and B) has a 128-step global brightness control (BC) function. The maximum current value of all 48 channels can be set with an 8-step maximum current control (MC) function. The device has two error flags: LED open detection (LOD) and LED short detection (LSD). The error flags can be read via a serial interface port. The device also has a power-save mode that sets the total current consumption to 7 µA (typ) when all outputs are off.