方案LED DisplayConstant Current DriverICN2053

ICN2053

LED Display

Description
The ICN2053 is a 16-channel PWM constant current sink LED driver for 1:32 time multiplexing applications. The constant-current value of all 16 channels is set by a single external resistor.
ICN2053 converts serial input date into the gray scale of each pixel by a 16-bit shift register. ICN2053 detects individual LED open errors without extra components. ICN2053 also integrated pre-charge circuit for ghosting reduction.
The ICN2053 exploits precise current regulation technology, with both channel-to-channelerr or and chip-to-chip error less than 2.0%.
Features
16 constant-current output channels
Support time-multiplexing for 1~32 scans
Output current setting range
        0.5~25mA×16@VDD=5V constant currentoutput
        0.5~18mA×16@VDD=4.2V constant currentoutput
        0.5~10mA×16@VDD=3.3V constant currentoutput
Current accuracy
        Between channel :< ±2.0 %(Max.)
        Between ICs :< ±2.0 % (Max.)
8 bit current gain12.5%~200%
Fast response of output current:
        (min):20ns@VDD=5V
Data transfer frequency: fMAX=35MHz(Max)
Power supply voltage: VDD=3.35V
Operating Temperature: –40°C to +85°C
Output current equation
        
Pre-charge for ghosting reduction
LED open detection
Enhanced Circuit for Caterpillar Cancelling

Low-gray scale enhancement

 Integrating LED protection circuit


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