Catalog
8/16-channel LED driver
Key Features
• Drive Capability and Output Counts80 mA (Current Sink) x 16 Bits120 mA (Current Sink) x 8 BitsConstant Current Output Range5 to 80 mA/10 to 120mA (Selectable by MODE Terminal) ( Current Value Setting for All Output Terminals Using External Resistor and Internal Brightness Control Register)Constant Current Accuracy±4% (Maximum Error Between Bits)Voltage Applied to Constant Current Output TerminalsMinimum 0.4 V (Output Current 5 mA to40 mA)Minimum 0.7 V (Output Current 40 to80 mA)256 Gray Scale DisplayPulse Width Control 256 StepsBrightness AdjustmentOutput Current Adjustment for 32 Steps (Adjustment for Brightness Deviation Between LED Modules)8 Steps Brightness Control by 8 Times Speed Gray Scale Control Clock (Brightness Adjustment for Panel)Error Output Signal CheckCheck Error Output Signal Line Such as Protection Circuit When OperatingData Output Timing SelectableSelect Data Output Timing for Shift Register Relative to ClockOVM (Output Voltage Monitor)Monitor Voltage on Constant Current Output Terminals (Detect LED Disconnection and Short Circuit)WDT (Watchdog Timer)Turn Output Off When Scan Signal StoppedTSD (Thermal ShutDown)Turn Output Off When Junction Temperature Exceeds LimitData InputClock Synchronized 8 Bit Parallel Input (Schmitt-Triggered Input)Data OutputClock Synchronized 8 Bit Parallel Output (3-State Output)Input Signal Level...CMOS LevelPower Supply Voltage...4.5 V to 5.5 VMaximum Output Voltage...17 V (Max)Data Transfer Rate...15 MHz (Max)Gray Scale Clock Frequency8 MHz (Max)Operating Free-Air Temperature Range-20°C to 85°C100-Pin HTQFP Package (PD=4.7 W,TA= 25° C)Drive Capability and Output Counts80 mA (Current Sink) x 16 Bits120 mA (Current Sink) x 8 BitsConstant Current Output Range5 to 80 mA/10 to 120mA (Selectable by MODE Terminal) ( Current Value Setting for All Output Terminals Using External Resistor and Internal Brightness Control Register)Constant Current Accuracy±4% (Maximum Error Between Bits)Voltage Applied to Constant Current Output TerminalsMinimum 0.4 V (Output Current 5 mA to40 mA)Minimum 0.7 V (Output Current 40 to80 mA)256 Gray Scale DisplayPulse Width Control 256 StepsBrightness AdjustmentOutput Current Adjustment for 32 Steps (Adjustment for Brightness Deviation Between LED Modules)8 Steps Brightness Control by 8 Times Speed Gray Scale Control Clock (Brightness Adjustment for Panel)Error Output Signal CheckCheck Error Output Signal Line Such as Protection Circuit When OperatingData Output Timing SelectableSelect Data Output Timing for Shift Register Relative to ClockOVM (Output Voltage Monitor)Monitor Voltage on Constant Current Output Terminals (Detect LED Disconnection and Short Circuit)WDT (Watchdog Timer)Turn Output Off When Scan Signal StoppedTSD (Thermal ShutDown)Turn Output Off When Junction Temperature Exceeds LimitData InputClock Synchronized 8 Bit Parallel Input (Schmitt-Triggered Input)Data OutputClock Synchronized 8 Bit Parallel Output (3-State Output)Input Signal Level...CMOS LevelPower Supply Voltage...4.5 V to 5.5 VMaximum Output Voltage...17 V (Max)Data Transfer Rate...15 MHz (Max)Gray Scale Clock Frequency8 MHz (Max)Operating Free-Air Temperature Range-20°C to 85°C100-Pin HTQFP Package (PD=4.7 W,TA= 25° C)
Description
AI
The TLC5904 is a constant current driver incorporating shift register, data latch, and constant current circuitry with current value adjustable and a 256 gray scale display using pulse width control. The output current can be selected as maximum 80 mA with 16 bits or 120 mA with 8 bits, and the current value of constant current output can be set by one external resistor. After this device is mounted on a PCB, the brightness deviation between LED modules (ICs) can be adjusted by external data input, and the brightness control for the panel can be accomplished by the brightness adjustment circuitry. Also, the device incorporates the output voltage monitor (OVM) used for LED open detection (LOD) by monitoring the constant current output. Moreover, the device incorporates watchdog time (WDT) circuitry, which turns the constant current output off when a scan signal is stopped at the dynamic scanning operation, and thermal shutdown (TSD) circuitry, which turns the constant current output off when the junction temperature exceeds the limit.
The TLC5904 is a constant current driver incorporating shift register, data latch, and constant current circuitry with current value adjustable and a 256 gray scale display using pulse width control. The output current can be selected as maximum 80 mA with 16 bits or 120 mA with 8 bits, and the current value of constant current output can be set by one external resistor. After this device is mounted on a PCB, the brightness deviation between LED modules (ICs) can be adjusted by external data input, and the brightness control for the panel can be accomplished by the brightness adjustment circuitry. Also, the device incorporates the output voltage monitor (OVM) used for LED open detection (LOD) by monitoring the constant current output. Moreover, the device incorporates watchdog time (WDT) circuitry, which turns the constant current output off when a scan signal is stopped at the dynamic scanning operation, and thermal shutdown (TSD) circuitry, which turns the constant current output off when the junction temperature exceeds the limit.
