Chipone ICND2055 Constant Current Driver


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The ICND2055 is a 16-channel PWM constant current sink LED driver for 1:32 time multiplexing applications (with 16 KB SRAM). The constant-current value of all 16 channels is set by a single external resistor.

ICND2055 converts serial input date into the gray scale of each pixel by a 16-bit shift register.ICND2055 detects individual LED open errors without extra components. ICND2055 also integrated pre-charge circuit for ghosting reduction.

The ICND2055 exploits precise current regulation technology, with both channel-to-channel error and chip-to-chip error less than ±2.0%.


• 16 constant-current output channels

• Support time-multiplexing for 1~32 scans

• Output current setting range:

0.5~25mA×16@VDD=5V constant current output

0.5~18mA×16@VDD=4.2V constant current output

• Current accuracy

Between channel :< ±2.0 %(Max.)

Between ICs :< ±2.0 % (Max.)

• 8 bit current gain:22%~200%

• Fast response of output current:

• Data transfer frequency: fMAX=30MHz(Max)

• Power supply voltage: VDD=3.3~5V

• Operating Temperature: –40°C to +85°C

• Dynamic energy-saving

• Pre-charge for ghosting reduction

• LED open detection

• Enhanced Circuit for Caterpillar Cancelling

• Enhancement: Non-uniformity at low gray scale,

Color shift, low gray mosaics, Dim line at first scan

• Integrating LED protection circuit

• Elimination high contrast coupling an color-cast between modules