低功耗的16通道恒流LED驱动器 LOW-POWER 16-CHANNEL CONSTANT-CURRENT LED SINK DRIVER
DESCRIPON/ORDERING INFORMATION
The TLC5925 is designed for LED displays and LED lighting applications. The TLC5925 contains a 16-bit shift register and data latches, which convert serial input data into parallel output format. At the TLC5925 output stage, 16 regulated-current ports provide uniform and constant current for driving LEDs within a wide range of VF variations. Used in system design for LED display applications e.g., LED panels, the TLC5925 provides great flexibility and device performance. Users can adjust the output current from 3 mA to 45 mA through an external resistor, Rext, which gives flexibility in controlling the light intensity of LEDs. TLC5925 is designed for up to 17 V
at the output port. The high clock frequency, 30 MHz, also satisfies the system requirements of high-volume data transmission.
The serial data is transferred into TLC5925 via SDI, shifted in the shift register, and transferred out via SDO. LE can latch the serial data in the shift register to the output latch. OE enables the output drivers to sink current.
FEATURES
• 16 Constant-Current Output Channels
• Constant Output Current Invariant to Load Voltage Change
• Excellent Output Current Accuracy:
– Between Channels: < ±4% Max
– Between ICs: < ±6% Max
• Constant Output Current Range: 3 mA to 45 mA
• Output Current Adjusted By External Resistor
• Fast Response of Output Current, OE Min: 100 ns
• 30-MHz Clock Frequency
• Schmitt-Trigger Inputs
• 3.3-V to 5-V Supply Voltage
• Thermal Shutdown for Overtemperature Protection
• ESD Performance: 1-kV HBM
APPLICATIONS
• Gaming Machine / Entertainment
• General LED Applications
• LED Display Systems
• Signs LED Lighting
• White Goods