16-BIT CONSTANT CURRENT LED SINK DRIVER
DESCRIPTION
The UTC L16B45 is designed for LED displays. UTC L16B45
contains a serial buffer and data latches which convert serial input
data into parallel output format. At UTC L16B45 output stage,
sixteen regulated current ports are designed to provide uniform and
constant current sinks for driving LEDs within a large range of VF
variations.
UTC L16B45 provides users with great flexibility and device
performance while using UTC L16B45 in their system design for
LED display applications, e.g. LED panels. Users may adjust the
output current from 3mA to 45mA through an external resistor, Rext,
which gives users flexibility in controlling the light intensity of LEDs.
UTC L16B45 guarantees to endure maximum 17V at the output
port. The high clock frequency, 25MHz, also satisfies the system
requirements of high volume data transmission.
FEATURES
* 16 constant-current output channels
* Constant output current invariant to load voltage change：
Constant output current range:
3~45mA @ VDD=5V
3~30mA @ VDD=3.3V
* Excellent output current accuracy:
between channels: ±3% (max.),
between ICs: ±6% (max.)
* Output current adjusted through an external resistor
* Fast response of output current, OE (min.): 300ns @ VDD=3.3V
* 25MHz clock frequency
* Schmitt trigger input
* 3.3V, 5V supply voltage |
