16通道， 12位， ES -PWM ，完全自我诊断LED驱动器，用于7位全局BC LED灯 16-Channel, 12-Bit, ES-PWM, Full Self-Diagnosis LED Driver for 7-Bit Global BC LED Lamp
DESCRIPON
The TLC5949 is a 16-channel, constant-current sink driver. Each channel has an individually-adjustable, pulse width modulation PWM grayscale GS brightness control with 4096 steps. All channels have a 128-step global brightness control BC. BC adjusts brightness deviation with other LED drivers. GS and BC data are accessible with a serial interface port.
The TLC5949 has six error flags: LED open detection LOD, LED short detection LSD, output leakage detection OLD, reference current terminal short flag detection ISF, pre-thermal warning PTW, and thermal error flag TEF. The error detection results can be read with a serial interface port.
FEATURES
• 16 Constant-Current Sink Output Channels
• Sink Current Capability with Maximum BC Data: 2 mA to 45 mA
• Global Brightness Control BC:
– 7-Bit 128 Steps with 25% to 100% Range
• Grayscale Control GS with Enhanced Spectrum or Conventional PWM:
– 12-Bit 4096 Steps
• LED Power-Supply Voltage: Up to 10 V
• VCC: 3.0 V to 3.6 V
• Constant-Current Accuracy:
– Channel-to-Channel: ±0.6% typ, ±2% max
– Device-to-Device: ±1% typ, ±4% max
• Data Transfer Rate: 33 MHz
• Grayscale Control Clock: 33 MHz
• Auto Display Repeat and Auto Data Refresh
• Display Timing Reset
• Power-Save Mode to Minimize VCC Current
• LOD and LSD with Invisible Detection Mode IDM
• Output Leakage Detection OLD
• Current Reference Terminal Short Flag ISF
• Thermal Shutdown TSD and Error Flag TEF
• Pre-Thermal Warning PTW
• Four-Channel Grouped Delay Switching to Prevent Inrush Current
• Operating Temperature: –40°C to +85°C
APPLICATIONS
• LED Video Displays
• LED Signboards